diff --git a/app/common/CMakeLists.txt b/app/common/CMakeLists.txt
index 930eb2d53..b8627409c 100644
--- a/app/common/CMakeLists.txt
+++ b/app/common/CMakeLists.txt
@@ -35,5 +35,7 @@ set(OLIVE_SOURCES
   common/threadedobject.cpp
   common/timecodefunctions.h
   common/timecodefunctions.cpp
+  common/timerange.h
+  common/timerange.cpp
   PARENT_SCOPE
 )
diff --git a/app/common/timerange.cpp b/app/common/timerange.cpp
new file mode 100644
index 000000000..e4ec160a1
--- /dev/null
+++ b/app/common/timerange.cpp
@@ -0,0 +1,51 @@
+#include "timerange.h"
+
+TimeRange::TimeRange()
+{
+}
+
+TimeRange::TimeRange(const rational &in, const rational &out) :
+  in_(in),
+  out_(out)
+{
+  normalize();
+}
+
+const rational &TimeRange::in() const
+{
+  return in_;
+}
+
+const rational &TimeRange::out() const
+{
+  return out_;
+}
+
+void TimeRange::set_in(const rational &in)
+{
+  in_ = in;
+  normalize();
+}
+
+void TimeRange::set_out(const rational &out)
+{
+  out_ = out;
+  normalize();
+}
+
+void TimeRange::set_range(const rational &in, const rational &out)
+{
+  in_ = in;
+  out_ = out;
+  normalize();
+}
+
+void TimeRange::normalize()
+{
+  // If `out` is earlier than `in`, swap them
+  if (out_ < in_) {
+    rational temp = in_;
+    in_ = out_;
+    out_ = temp;
+  }
+}
diff --git a/app/common/timerange.h b/app/common/timerange.h
new file mode 100644
index 000000000..1ff31992b
--- /dev/null
+++ b/app/common/timerange.h
@@ -0,0 +1,25 @@
+#ifndef TIMERANGE_H
+#define TIMERANGE_H
+
+#include "rational.h"
+
+class TimeRange {
+public:
+  TimeRange();
+  TimeRange(const rational& in, const rational& out);
+
+  const rational& in() const;
+  const rational& out() const;
+
+  void set_in(const rational& in);
+  void set_out(const rational& out);
+  void set_range(const rational& in, const rational& out);
+
+private:
+  void normalize();
+
+  rational in_;
+  rational out_;
+};
+
+#endif // TIMERANGE_H
diff --git a/app/core.cpp b/app/core.cpp
index 01db4d6cf..d85a470ee 100644
--- a/app/core.cpp
+++ b/app/core.cpp
@@ -274,7 +274,7 @@ void Core::CreateNewSequence()
   SequencePtr new_sequence = std::make_shared<Sequence>();
 
   // Set all defaults for the sequence
-  new_sequence->SetDefaultParameters();
+  new_sequence->set_default_parameters();
 
   // Get default name for this sequence (in the format "Sequence N", the first that doesn't exist)
   int sequence_number = 1;
diff --git a/app/dialog/sequence/sequence.cpp b/app/dialog/sequence/sequence.cpp
index da1f9c13d..29a227203 100644
--- a/app/dialog/sequence/sequence.cpp
+++ b/app/dialog/sequence/sequence.cpp
@@ -115,16 +115,16 @@ SequenceDialog::SequenceDialog(Sequence* s, Type t, QWidget* parent) :
   AddFrameRate(rational(60, 1));            // 60 FPS
 
   // Set up available sample rates
-  AddSampleRate(rational(8000, 1));         // 8000 Hz
-  AddSampleRate(rational(11025, 1));        // 11025 Hz
-  AddSampleRate(rational(16000, 1));        // 16000 Hz
-  AddSampleRate(rational(22050, 1));        // 22050 Hz
-  AddSampleRate(rational(24000, 1));        // 24000 Hz
-  AddSampleRate(rational(32000, 1));        // 32000 Hz
-  AddSampleRate(rational(44100, 1));        // 44100 Hz
-  AddSampleRate(rational(48000, 1));        // 48000 Hz
-  AddSampleRate(rational(88200, 1));        // 88200 Hz
-  AddSampleRate(rational(96000, 1));        // 96000 Hz
+  AddSampleRate(8000);         // 8000 Hz
+  AddSampleRate(11025);        // 11025 Hz
+  AddSampleRate(16000);        // 16000 Hz
+  AddSampleRate(22050);        // 22050 Hz
+  AddSampleRate(24000);        // 24000 Hz
+  AddSampleRate(32000);        // 32000 Hz
+  AddSampleRate(44100);        // 44100 Hz
+  AddSampleRate(48000);        // 48000 Hz
+  AddSampleRate(88200);        // 88200 Hz
+  AddSampleRate(96000);        // 96000 Hz
 
   // Set up available channel layouts
   AddChannelLayout(AV_CH_LAYOUT_MONO);
@@ -133,17 +133,17 @@ SequenceDialog::SequenceDialog(Sequence* s, Type t, QWidget* parent) :
   AddChannelLayout(AV_CH_LAYOUT_7POINT1);
 
   // Set values based on input sequence
-  video_width_field_->setValue(sequence_->video_width());
-  video_height_field_->setValue(sequence_->video_height());
+  video_width_field_->setValue(sequence_->video_params().width());
+  video_height_field_->setValue(sequence_->video_params().height());
 
-  int frame_rate_index = frame_rate_list_.indexOf(sequence_->video_time_base().flipped());
+  int frame_rate_index = frame_rate_list_.indexOf(sequence_->video_params().time_base().flipped());
   video_frame_rate_field_->setCurrentIndex(frame_rate_index);
 
-  int sample_rate_index = sample_rate_list_.indexOf(sequence_->audio_time_base().flipped());
+  int sample_rate_index = sample_rate_list_.indexOf(sequence_->audio_params().sample_rate());
   audio_sample_rate_field_->setCurrentIndex(sample_rate_index);
 
   for (int i=0;i<audio_channels_field_->count();i++) {
-    if (audio_channels_field_->itemData(i).toULongLong() == sequence_->audio_channel_layout()) {
+    if (audio_channels_field_->itemData(i).toULongLong() == sequence_->audio_params().channel_layout()) {
       audio_channels_field_->setCurrentIndex(i);
       break;
     }
@@ -169,32 +169,33 @@ void SequenceDialog::accept()
 
 
   // Get the rational at the combobox's index (which will be correct provided AddFrameRate() was used at all time)
-  rational audio_time_base = sample_rate_list_.at(audio_sample_rate_field_->currentIndex()).flipped();
+  int audio_sample_rate = sample_rate_list_.at(audio_sample_rate_field_->currentIndex());
 
   // Get the audio channel layout value
   uint64_t channels = audio_channels_field_->currentData().toULongLong();
 
+  // Generate video and audio parameter structs from data
+  VideoParams video_params = VideoParams(video_width_field_->value(),
+                                         video_height_field_->value(),
+                                         video_time_base);
+
+  AudioParams audio_params = AudioParams(audio_sample_rate,
+                                         channels);
+
   if (make_undoable_) {
 
     // Make undoable command to change the parameters
     SequenceParamCommand* param_command = new SequenceParamCommand(sequence_,
-                                                                   video_width_field_->value(),
-                                                                   video_height_field_->value(),
-                                                                   video_time_base,
-                                                                   audio_time_base,
-                                                                   channels);
+                                                                   video_params,
+                                                                   audio_params,
+                                                                   name_field_->text());
 
     olive::undo_stack.push(param_command);
 
   } else {
     // Set sequence values directly with no undo command
-    sequence_->set_video_width(video_width_field_->value());
-    sequence_->set_video_height(video_height_field_->value());
-    sequence_->set_video_time_base(video_time_base);
-
-    sequence_->set_audio_time_base(audio_time_base);
-    sequence_->set_audio_channel_layout(channels);
-
+    sequence_->set_video_params(video_params);
+    sequence_->set_audio_params(audio_params);
     sequence_->set_name(name_field_->text());
   }
 
@@ -208,11 +209,11 @@ void SequenceDialog::AddFrameRate(const rational &r)
   video_frame_rate_field_->addItem(tr("%1 FPS").arg(r.toDouble()));
 }
 
-void SequenceDialog::AddSampleRate(const rational &rate)
+void SequenceDialog::AddSampleRate(const int &rate)
 {
   sample_rate_list_.append(rate);
 
-  audio_sample_rate_field_->addItem(tr("%1 Hz").arg(rate.toDouble()));
+  audio_sample_rate_field_->addItem(tr("%1 Hz").arg(rate));
 }
 
 void SequenceDialog::AddChannelLayout(int layout)
@@ -239,42 +240,32 @@ void SequenceDialog::AddChannelLayout(int layout)
   audio_channels_field_->addItem(layout_name, layout);
 }
 
-SequenceDialog::SequenceParamCommand::SequenceParamCommand(Sequence *s,
-                                                           const int &width,
-                                                           const int &height,
-                                                           const rational &v_timebase,
-                                                           const rational &a_timebase,
-                                                           const uint64_t &channels,
-                                                           QUndoCommand *parent):
+SequenceDialog::SequenceParamCommand::SequenceParamCommand(Sequence* s,
+                                                           const VideoParams& video_params,
+                                                           const AudioParams& audio_params,
+                                                           const QString& name,
+                                                           QUndoCommand* parent) :
   QUndoCommand(parent),
   sequence_(s),
-  width_(width),
-  height_(height),
-  v_timebase_(v_timebase),
-  a_timebase_(a_timebase),
-  channels_(channels),
-  old_width_(s->video_width()),
-  old_height_(s->video_height()),
-  old_v_timebase_(s->video_time_base()),
-  old_a_timebase_(s->audio_time_base()),
-  old_channels_(s->audio_channel_layout())
+  new_video_params_(video_params),
+  new_audio_params_(audio_params),
+  new_name_(name),
+  old_video_params_(s->video_params()),
+  old_audio_params_(s->audio_params()),
+  old_name_(s->name())
 {
 }
 
 void SequenceDialog::SequenceParamCommand::redo()
 {
-  sequence_->set_video_width(width_);
-  sequence_->set_video_height(height_);
-  sequence_->set_video_time_base(v_timebase_);
-  sequence_->set_audio_time_base(a_timebase_);
-  sequence_->set_audio_channel_layout(channels_);
+  sequence_->set_video_params(new_video_params_);
+  sequence_->set_audio_params(new_audio_params_);
+  sequence_->set_name(new_name_);
 }
 
 void SequenceDialog::SequenceParamCommand::undo()
 {
-  sequence_->set_video_width(old_width_);
-  sequence_->set_video_height(old_height_);
-  sequence_->set_video_time_base(old_v_timebase_);
-  sequence_->set_audio_time_base(old_a_timebase_);
-  sequence_->set_audio_channel_layout(old_channels_);
+  sequence_->set_video_params(old_video_params_);
+  sequence_->set_audio_params(old_audio_params_);
+  sequence_->set_name(old_name_);
 }
diff --git a/app/dialog/sequence/sequence.h b/app/dialog/sequence/sequence.h
index 6ada69f10..c4e53206f 100644
--- a/app/dialog/sequence/sequence.h
+++ b/app/dialog/sequence/sequence.h
@@ -90,7 +90,7 @@ private:
   /**
    * @brief Internal function for adding a selectable sample rate
    */
-  void AddSampleRate(const rational &rate);
+  void AddSampleRate(const int &rate);
 
   /**
    * @brief Internal function for adding a selectable channel layout
@@ -115,7 +115,7 @@ private:
 
   QVector<rational> frame_rate_list_;
 
-  QVector<rational> sample_rate_list_;
+  QVector<int> sample_rate_list_;
 
   /**
    * @brief A QUndoCommand for setting the parameters on a sequence
@@ -123,11 +123,9 @@ private:
   class SequenceParamCommand : public QUndoCommand {
   public:
     SequenceParamCommand(Sequence* s,
-                         const int& width,
-                         const int& height,
-                         const rational& v_timebase,
-                         const rational& a_timebase,
-                         const uint64_t &channels,
+                         const VideoParams& video_params,
+                         const AudioParams& audio_params,
+                         const QString& name,
                          QUndoCommand* parent = nullptr);
 
     virtual void redo() override;
@@ -135,17 +133,13 @@ private:
   private:
     Sequence* sequence_;
 
-    int width_;
-    int height_;
-    rational v_timebase_;
-    rational a_timebase_;
-    uint64_t channels_;
+    VideoParams new_video_params_;
+    AudioParams new_audio_params_;
+    QString new_name_;
 
-    int old_width_;
-    int old_height_;
-    rational old_v_timebase_;
-    rational old_a_timebase_;
-    uint64_t old_channels_;
+    VideoParams old_video_params_;
+    AudioParams old_audio_params_;
+    QString old_name_;
   };
 };
 
diff --git a/app/node/block/clip/clip.cpp b/app/node/block/clip/clip.cpp
index a0b7a4bc9..029ba5ff1 100644
--- a/app/node/block/clip/clip.cpp
+++ b/app/node/block/clip/clip.cpp
@@ -99,7 +99,7 @@ QList<NodeDependency> ClipBlock::RunDependencies(NodeOutput *output, const ratio
   QList<NodeDependency> deps;
 
   if (output == texture_output() && texture_input_->IsConnected()) {
-    deps.append(NodeDependency(texture_input_->get_connected_output(), SequenceToMediaTime(time)));
+    deps.append(NodeDependency(texture_input_->get_connected_output(), SequenceToMediaTime(time), SequenceToMediaTime(time)));
   }
 
   return deps;
diff --git a/app/node/dependency.cpp b/app/node/dependency.cpp
index a98117a57..c86e1e829 100644
--- a/app/node/dependency.cpp
+++ b/app/node/dependency.cpp
@@ -25,9 +25,15 @@ NodeDependency::NodeDependency() :
 {
 }
 
-NodeDependency::NodeDependency(NodeOutput *node, const rational &time) :
+NodeDependency::NodeDependency(NodeOutput *node, const TimeRange &range) :
   node_(node),
-  time_(time)
+  range_(range)
+{
+}
+
+NodeDependency::NodeDependency(NodeOutput *node, const rational &in, const rational &out) :
+  node_(node),
+  range_(in, out)
 {
 }
 
@@ -36,7 +42,17 @@ NodeOutput *NodeDependency::node() const
   return node_;
 }
 
-const rational& NodeDependency::time() const
+const rational& NodeDependency::in() const
 {
-  return time_;
+  return range_.in();
+}
+
+const rational &NodeDependency::out() const
+{
+  return range_.out();
+}
+
+const TimeRange &NodeDependency::range() const
+{
+  return range_;
 }
diff --git a/app/node/dependency.h b/app/node/dependency.h
index 7fa719173..718c5f6a2 100644
--- a/app/node/dependency.h
+++ b/app/node/dependency.h
@@ -23,20 +23,23 @@
 
 #include <QMetaType>
 
-#include "common/rational.h"
+#include "common/timerange.h"
 #include "node/output.h"
 
 class NodeDependency {
 public:
   NodeDependency();
-  NodeDependency(NodeOutput* node, const rational& time);
+  NodeDependency(NodeOutput* node, const TimeRange& range);
+  NodeDependency(NodeOutput* node, const rational& in, const rational &out);
 
   NodeOutput* node() const;
-  const rational& time() const;
+  const rational& in() const;
+  const rational& out() const;
+  const TimeRange& range() const;
 
 private:
   NodeOutput* node_;
-  rational time_;
+  TimeRange range_;
 };
 
 Q_DECLARE_METATYPE(NodeDependency)
diff --git a/app/node/input/media/media.cpp b/app/node/input/media/media.cpp
index 985edb7d2..3cf4ee5f3 100644
--- a/app/node/input/media/media.cpp
+++ b/app/node/input/media/media.cpp
@@ -173,7 +173,7 @@ QVariant MediaInput::Value(NodeOutput *output, const rational &in, const rationa
       // OpenColorIO v1's color transforms can be done on GPU, which improves performance but reduces accuracy. When
       // online, we prefer accuracy over performance so we use the CPU path instead:
       // NOTE: OCIO v2 boasts 1:1 results with the CPU and GPU path so this won't be necessary forever
-      if (renderer->mode() == olive::RenderMode::kOnline) {
+      if (renderer->params().mode() == olive::RenderMode::kOnline) {
         // Convert to 32F, which is required for OpenColorIO's color transformation
         frame_ = PixelService::ConvertPixelFormat(frame_, olive::PIX_FMT_RGBA32F);
 
@@ -220,15 +220,15 @@ QVariant MediaInput::Value(NodeOutput *output, const rational &in, const rationa
     RenderTexturePtr output_texture = std::make_shared<RenderTexture>();
 
     output_texture->Create(renderer->context(),
-                    renderer->width(),
-                    renderer->height(),
-                    renderer->format(),
-                    RenderTexture::kDoubleBuffer);
+                           renderer->params().width(),
+                           renderer->params().height(),
+                           renderer->params().format(),
+                           RenderTexture::kDoubleBuffer);
 
     // Using the transformation matrix, blit our internal texture (in frame format) to our output texture (in
     // reference format)
 
-    if (renderer->mode() == olive::RenderMode::kOffline) {
+    if (renderer->params().mode() == olive::RenderMode::kOffline) {
       // For offline rendering, OCIO's GPU path is acceptable:
       // NOTE: OCIO v2 boasts 1:1 results with the CPU and GPU path so this won't be necessary forever
 
@@ -259,8 +259,8 @@ QVariant MediaInput::Value(NodeOutput *output, const rational &in, const rationa
     QMatrix4x4 transform;
 
     // Scale texture to a square for incoming matrix transformation
-    transform.scale(2.0f / static_cast<float>(renderer->width() * renderer->divider()),
-                    2.0f / static_cast<float>(renderer->height() * renderer->divider()));
+    transform.scale(2.0f / static_cast<float>(renderer->params().width() * renderer->params().divider()),
+                    2.0f / static_cast<float>(renderer->params().height() * renderer->params().divider()));
 
     // Multiply by input transformation
     transform *= matrix_input_->get_value(in).value<QMatrix4x4>();
@@ -273,7 +273,7 @@ QVariant MediaInput::Value(NodeOutput *output, const rational &in, const rationa
     //transform.scale(media_size, media_size);
 
     // Use pipeline to blit using transformation matrix from input
-    if (renderer->mode() == olive::RenderMode::kOffline) {
+    if (renderer->params().mode() == olive::RenderMode::kOffline) {
       olive::gl::OCIOBlit(pipeline_, ocio_texture_, false, transform);
     } else {
       olive::gl::Blit(pipeline_, false, transform);
diff --git a/app/node/node.cpp b/app/node/node.cpp
index f8374b6f6..d5f361fb5 100644
--- a/app/node/node.cpp
+++ b/app/node/node.cpp
@@ -293,7 +293,7 @@ QList<NodeDependency> Node::RunDependencies(NodeOutput *output, const rational &
         NodeOutput* potential_dep = input->get_connected_output();
 
         if (potential_dep != nullptr) {
-          run_deps.append(NodeDependency(potential_dep, time));
+          run_deps.append(NodeDependency(potential_dep, time, time));
         }
       }
     }
@@ -367,7 +367,7 @@ void Node::Hash(QCryptographicHash *hash, NodeOutput* from, const rational &time
   QList<NodeDependency> deps = RunDependencies(from, time);
   foreach (const NodeDependency& dep, deps) {
     // Hash the connected node
-    dep.node()->parent()->Hash(hash, dep.node(), dep.time());
+    dep.node()->parent()->Hash(hash, dep.node(), dep.in());
   }
 }
 
diff --git a/app/node/output/track/track.cpp b/app/node/output/track/track.cpp
index b6d997b17..2e2209cbc 100644
--- a/app/node/output/track/track.cpp
+++ b/app/node/output/track/track.cpp
@@ -131,7 +131,7 @@ QList<NodeDependency> TrackOutput::RunDependencies(NodeOutput* output, const rat
     ValidateCurrentBlock(time);
 
     if (current_block_ != this) {
-      deps.append(NodeDependency(current_block_->texture_output(), time));
+      deps.append(NodeDependency(current_block_->texture_output(), time, time));
     }
   }
 
diff --git a/app/node/output/viewer/viewer.cpp b/app/node/output/viewer/viewer.cpp
index a82eed662..de21fa3b2 100644
--- a/app/node/output/viewer/viewer.cpp
+++ b/app/node/output/viewer/viewer.cpp
@@ -20,9 +20,7 @@
 
 #include "viewer.h"
 
-ViewerOutput::ViewerOutput() :
-  viewer_width_(0),
-  viewer_height_(0)
+ViewerOutput::ViewerOutput()
 {
   texture_input_ = new NodeInput("tex_in");
   texture_input_->add_data_input(NodeInput::kTexture);
@@ -57,18 +55,6 @@ QString ViewerOutput::Description()
   return tr("Interface between a Viewer panel and the node system.");
 }
 
-const rational &ViewerOutput::Timebase()
-{
-  return timebase_;
-}
-
-void ViewerOutput::SetTimebase(const rational &timebase)
-{
-  timebase_ = timebase;
-
-  emit TimebaseChanged(timebase_);
-}
-
 NodeInput *ViewerOutput::texture_input()
 {
   return texture_input_;
@@ -103,22 +89,27 @@ void ViewerOutput::InvalidateCache(const rational &start_range, const rational &
   SendInvalidateCache(start_range, end_range);
 }
 
-void ViewerOutput::SetViewerSize(const int &width, const int &height)
+const VideoParams &ViewerOutput::video_params()
 {
-  viewer_width_ = width;
-  viewer_height_ = height;
-
-  emit SizeChanged(viewer_width_, viewer_height_);
+  return video_params_;
 }
 
-const int &ViewerOutput::ViewerWidth()
+const AudioParams &ViewerOutput::audio_params()
 {
-  return viewer_width_;
+  return audio_params_;
 }
 
-const int &ViewerOutput::ViewerHeight()
+void ViewerOutput::set_video_params(const VideoParams &video)
 {
-  return viewer_height_;
+  video_params_ = video;
+
+  emit SizeChanged(video_params_.width(), video_params_.height());
+  emit TimebaseChanged(video_params_.time_base());
+}
+
+void ViewerOutput::set_audio_params(const AudioParams &audio)
+{
+  audio_params_ = audio;
 }
 
 rational ViewerOutput::Length()
diff --git a/app/node/output/viewer/viewer.h b/app/node/output/viewer/viewer.h
index 44732a0e6..8b38c3f2a 100644
--- a/app/node/output/viewer/viewer.h
+++ b/app/node/output/viewer/viewer.h
@@ -22,6 +22,8 @@
 #define VIEWER_H
 
 #include "node/node.h"
+#include "render/videoparams.h"
+#include "render/audio/audioparams.h"
 #include "render/rendertexture.h"
 
 /**
@@ -40,9 +42,6 @@ public:
   virtual QString Category() override;
   virtual QString Description() override;
 
-  const rational& Timebase();
-  void SetTimebase(const rational& timebase);
-
   NodeInput* texture_input();
   NodeInput* samples_input();
   NodeInput* length_input();
@@ -52,10 +51,11 @@ public:
 
   virtual void InvalidateCache(const rational &start_range, const rational &end_range, NodeInput *from = nullptr) override;
 
-  void SetViewerSize(const int& width, const int& height);
+  const VideoParams& video_params();
+  const AudioParams& audio_params();
 
-  const int& ViewerWidth();
-  const int& ViewerHeight();
+  void set_video_params(const VideoParams& video);
+  void set_audio_params(const AudioParams& audio);
 
   rational Length();
 
@@ -78,9 +78,9 @@ private:
 
   rational timebase_;
 
-  int viewer_width_;
+  VideoParams video_params_;
 
-  int viewer_height_;
+  AudioParams audio_params_;
 
 };
 
diff --git a/app/project/item/sequence/sequence.cpp b/app/project/item/sequence/sequence.cpp
index ef4ff584b..ba28f41c3 100644
--- a/app/project/item/sequence/sequence.cpp
+++ b/app/project/item/sequence/sequence.cpp
@@ -84,9 +84,7 @@ void Sequence::add_default_nodes()
   NodeParam::ConnectEdge(audio_track_output_->track_output(), timeline_output_->track_input(kTrackTypeAudio));
 
   // Update the timebase on these nodes
-  //video_renderer_processor_->SetCacheName(name());
-  set_video_time_base(video_time_base_);
-  update_video_parameters();
+  set_video_params(video_params_);
 }
 
 Item::Type Sequence::type() const
@@ -107,102 +105,48 @@ QString Sequence::duration()
 
   rational timeline_length = timeline_output_->length_output()->get_value(0, 0).value<rational>();
 
-  int64_t timestamp = olive::time_to_timestamp(timeline_length, video_time_base_);
+  int64_t timestamp = olive::time_to_timestamp(timeline_length, video_params_.time_base());
 
-  return olive::timestamp_to_timecode(timestamp, video_time_base_, olive::CurrentTimecodeDisplay());
+  return olive::timestamp_to_timecode(timestamp, video_params_.time_base(), olive::CurrentTimecodeDisplay());
 }
 
 QString Sequence::rate()
 {
-  return QCoreApplication::translate("Sequence", "%1 FPS").arg(video_time_base_.flipped().toDouble());
+  return QCoreApplication::translate("Sequence", "%1 FPS").arg(video_params_.time_base().flipped().toDouble());
 }
 
-const int &Sequence::video_width()
+const VideoParams &Sequence::video_params()
 {
-  return video_width_;
+  return video_params_;
 }
 
-void Sequence::set_video_width(const int &width)
+void Sequence::set_video_params(const VideoParams &vparam)
 {
-  video_width_ = width;
-
-  update_video_parameters();
-}
-
-const int &Sequence::video_height() const
-{
-  return video_height_;
-}
-
-void Sequence::set_video_height(const int &height)
-{
-  video_height_ = height;
-
-  update_video_parameters();
-}
-
-const rational &Sequence::video_time_base()
-{
-  return video_time_base_;
-}
-
-void Sequence::set_video_time_base(const rational &time_base)
-{
-  video_time_base_ = time_base;
-
-  if (timeline_output_ != nullptr)
-    timeline_output_->SetTimebase(video_time_base_);
+  video_params_ = vparam;
 
   if (viewer_output_ != nullptr)
-    viewer_output_->SetTimebase(video_time_base_);
+    viewer_output_->set_video_params(video_params_);
+
+  if (timeline_output_ != nullptr)
+    timeline_output_->SetTimebase(video_params_.time_base());
 }
 
-const rational &Sequence::audio_time_base()
+const AudioParams &Sequence::audio_params()
 {
-  return audio_time_base_;
+  return audio_params_;
 }
 
-void Sequence::set_audio_time_base(const rational &time_base)
+void Sequence::set_audio_params(const AudioParams &params)
 {
-  audio_time_base_ = time_base;
+  audio_params_ = params;
+
+  if (viewer_output_ != nullptr)
+    viewer_output_->set_audio_params(audio_params_);
 }
 
-const uint64_t &Sequence::audio_channel_layout()
+void Sequence::set_default_parameters()
 {
-  return audio_channel_layout_;
-}
-
-void Sequence::set_audio_channel_layout(const uint64_t &channel_layout)
-{
-  audio_channel_layout_ = channel_layout;
-}
-
-void Sequence::SetDefaultParameters()
-{
-  // FIXME: Make these configurable
-  set_video_width(1920);
-  set_video_height(1080);
-  set_video_time_base(rational(1001, 30000));
-
-  set_audio_time_base(rational(1, 48000));
-  set_audio_channel_layout(AV_CH_LAYOUT_STEREO);
-}
-
-void Sequence::update_video_parameters()
-{
-  /*if (video_renderer_processor_ != nullptr) {
-    // Set renderer's parameters based on sequence's parameters
-    video_renderer_processor_->SetParameters(video_width_,
-                                       video_height_,
-                                       olive::PIX_FMT_RGBA16F, // FIXME: Make this configurable
-                                       olive::RenderMode::kOffline,
-                                       2);
-
-    // Set the "cache name" only here to aid the cache ID's uniqueness
-    video_renderer_processor_->SetCacheName(name());
-  }*/
-
-  if (viewer_output_ != nullptr) {
-    viewer_output_->SetViewerSize(video_width_, video_height_);
-  }
+  // FIXME: Make these configurable (hardcoded)
+  set_video_params(VideoParams(1920, 1080, rational(1001, 30000)));
+  set_audio_params(AudioParams(48000, AV_CH_LAYOUT_STEREO));
 }
diff --git a/app/project/item/sequence/sequence.h b/app/project/item/sequence/sequence.h
index 7b525ab0a..a94ebedae 100644
--- a/app/project/item/sequence/sequence.h
+++ b/app/project/item/sequence/sequence.h
@@ -25,6 +25,7 @@
 #include "node/graph.h"
 #include "node/output/timeline/timeline.h"
 #include "node/output/viewer/viewer.h"
+#include "render/videoparams.h"
 #include "render/video/videorenderer.h"
 #include "project/item/item.h"
 
@@ -53,41 +54,23 @@ public:
   virtual QString duration() override;
   virtual QString rate() override;
 
-  /* VIDEO GETTER/SETTER FUNCTIONS */
+  const VideoParams& video_params();
+  void set_video_params(const VideoParams& vparam);
 
-  const int& video_width();
-  void set_video_width(const int& width);
+  const AudioParams& audio_params();
+  void set_audio_params(const AudioParams& params);
 
-  const int& video_height() const;
-  void set_video_height(const int& height);
-
-  const rational& video_time_base();
-  void set_video_time_base(const rational& time_base);
-
-  /* AUDIO GETTER/SETTER FUNCTIONS */
-
-  const rational& audio_time_base();
-  void set_audio_time_base(const rational& time_base);
-
-  const uint64_t& audio_channel_layout();
-  void set_audio_channel_layout(const uint64_t& channel_layout);
-
-  void SetDefaultParameters();
+  void set_default_parameters();
 
 private:
-  void update_video_parameters();
-
   TimelineOutput* timeline_output_;
   ViewerOutput* viewer_output_;
   TrackOutput* video_track_output_;
   TrackOutput* audio_track_output_;
 
-  int video_width_;
-  int video_height_;
-  rational video_time_base_;
+  VideoParams video_params_;
 
-  rational audio_time_base_;
-  uint64_t audio_channel_layout_;
+  AudioParams audio_params_;
 };
 
 #endif // SEQUENCE_H
diff --git a/app/render/CMakeLists.txt b/app/render/CMakeLists.txt
index a7234a734..f360554ff 100644
--- a/app/render/CMakeLists.txt
+++ b/app/render/CMakeLists.txt
@@ -35,5 +35,7 @@ set(OLIVE_SOURCES
   render/renderframebuffer.cpp
   render/rendertexture.h
   render/rendertexture.cpp
+  render/videoparams.h
+  render/videoparams.cpp
   PARENT_SCOPE
 )
diff --git a/app/render/audio/CMakeLists.txt b/app/render/audio/CMakeLists.txt
index f29c143c9..ba57a7a4d 100644
--- a/app/render/audio/CMakeLists.txt
+++ b/app/render/audio/CMakeLists.txt
@@ -16,6 +16,8 @@
 
 set(OLIVE_SOURCES
   ${OLIVE_SOURCES}
+  render/audio/audioparams.h
+  render/audio/audioparams.cpp
   render/audio/audiorenderer.h
   render/audio/audiorenderer.cpp
   render/audio/audiorendererdownloadthread.h
diff --git a/app/render/audio/audioparams.cpp b/app/render/audio/audioparams.cpp
new file mode 100644
index 000000000..facaaf457
--- /dev/null
+++ b/app/render/audio/audioparams.cpp
@@ -0,0 +1,89 @@
+#include "audioparams.h"
+
+extern "C" {
+#include <libavformat/avformat.h>
+}
+
+AudioParams::AudioParams() :
+  sample_rate_(0),
+  channel_layout_(0)
+{
+}
+
+AudioParams::AudioParams(const int &sample_rate, const uint64_t &channel_layout) :
+  sample_rate_(sample_rate),
+  channel_layout_(channel_layout)
+{
+}
+
+const int &AudioParams::sample_rate() const
+{
+  return sample_rate_;
+}
+
+const uint64_t &AudioParams::channel_layout() const
+{
+  return channel_layout_;
+}
+
+AudioRenderingParams::AudioRenderingParams() :
+  format_(olive::SAMPLE_FMT_INVALID)
+{
+}
+
+AudioRenderingParams::AudioRenderingParams(const int &sample_rate, const uint64_t &channel_layout, const olive::SampleFormat &format) :
+  AudioParams(sample_rate, channel_layout),
+  format_(format)
+{
+}
+
+AudioRenderingParams::AudioRenderingParams(const AudioParams &params, const olive::SampleFormat &format) :
+  AudioParams(params),
+  format_(format)
+{
+}
+
+const olive::SampleFormat &AudioRenderingParams::format() const
+{
+  return format_;
+}
+
+int AudioRenderingParams::time_to_bytes(const rational &time) const
+{
+  Q_ASSERT(is_valid());
+
+  return qFloor(time.toDouble() * sample_rate()) * channel_count() * sample_size();
+}
+
+int AudioRenderingParams::channel_count() const
+{
+  return av_get_channel_layout_nb_channels(channel_layout());
+}
+
+int AudioRenderingParams::sample_size() const
+{
+  switch (format_) {
+  case olive::SAMPLE_FMT_U8:
+    return 1;
+  case olive::SAMPLE_FMT_S16:
+    return 2;
+  case olive::SAMPLE_FMT_S32:
+  case olive::SAMPLE_FMT_FLT:
+    return 4;
+  case olive::SAMPLE_FMT_DBL:
+    return 8;
+  case olive::SAMPLE_FMT_INVALID:
+  case olive::SAMPLE_FMT_COUNT:
+    break;
+  }
+
+  return 0;
+}
+
+bool AudioRenderingParams::is_valid() const
+{
+  return (sample_rate() > 0
+          && channel_layout() > 0
+          && format_ != olive::SAMPLE_FMT_INVALID
+          && format_ != olive::SAMPLE_FMT_COUNT);
+}
diff --git a/app/render/audio/audioparams.h b/app/render/audio/audioparams.h
new file mode 100644
index 000000000..9f657108c
--- /dev/null
+++ b/app/render/audio/audioparams.h
@@ -0,0 +1,42 @@
+#ifndef AUDIOPARAMS_H
+#define AUDIOPARAMS_H
+
+#include <QtMath>
+
+#include "audio/sampleformat.h"
+#include "common/rational.h"
+
+class AudioParams
+{
+public:
+  AudioParams();
+  AudioParams(const int& sample_rate, const uint64_t& channel_layout);
+
+  const int& sample_rate() const;
+  const uint64_t& channel_layout() const;
+
+private:
+  int sample_rate_;
+
+  uint64_t channel_layout_;
+
+};
+
+class AudioRenderingParams : public AudioParams {
+public:
+  AudioRenderingParams();
+  AudioRenderingParams(const int& sample_rate, const uint64_t& channel_layout, const olive::SampleFormat& format);
+  AudioRenderingParams(const AudioParams& params, const olive::SampleFormat& format);
+
+  int time_to_bytes(const rational& time) const;
+  int channel_count() const;
+  int sample_size() const;
+  bool is_valid() const;
+
+  const olive::SampleFormat& format() const;
+
+private:
+  olive::SampleFormat format_;
+};
+
+#endif // AUDIOPARAMS_H
diff --git a/app/render/audio/audiorenderer.cpp b/app/render/audio/audiorenderer.cpp
index b92722390..8e4d8b201 100644
--- a/app/render/audio/audiorenderer.cpp
+++ b/app/render/audio/audiorenderer.cpp
@@ -36,11 +36,7 @@
 AudioRendererProcessor::AudioRendererProcessor(QObject *parent) :
   QObject(parent),
   started_(false),
-  width_(0),
-  height_(0),
-  divider_(1),
   caching_(false),
-  push_time_(-1),
   starting_(false),
   viewer_node_(nullptr)
 {
@@ -63,10 +59,6 @@ void AudioRendererProcessor::SetCacheName(const QString &s)
 
 void AudioRendererProcessor::InvalidateCache(const rational &start_range, const rational &end_range)
 {
-  if (timebase_.isNull()) {
-    return;
-  }
-
   // Adjust range to min/max values
   rational start_range_adj = qMax(rational(0), start_range);
   rational end_range_adj = qMin(viewer_node_->Length(), end_range);
@@ -76,101 +68,45 @@ void AudioRendererProcessor::InvalidateCache(const rational &start_range, const
            << "and"
            << end_range_adj.toDouble();
 
-  // Snap start_range to timebase
-  double start_range_dbl = start_range_adj.toDouble();
-  double start_range_numf = start_range_dbl * static_cast<double>(timebase_.denominator());
-  int64_t start_range_numround = qFloor(start_range_numf/static_cast<double>(timebase_.numerator())) * timebase_.numerator();
-  rational true_start_range(start_range_numround, timebase_.denominator());
+  bool append = true;
 
-  for (rational r=true_start_range;r<=end_range_adj;r+=timebase_) {
-    // Try to order the queue from closest to the playhead to furthest
-    rational last_time = last_time_requested_;
+  for (int i=0;i<cache_queue_.size();i++) {
+    const TimeRange& const_range = cache_queue_.at(i);
 
-    rational diff = r - last_time;
-
-    if (diff < 0) {
-      // FIXME: Hardcoded number
-      // If the number is before the playhead, we still prioritize its closeness but not nearly as much (5:1 in this
-      // example)
-      diff = qAbs(diff) * 5;
-    }
-
-    bool contains = false;
-    bool added = false;
-    QLinkedList<rational>::iterator insert_iterator;
-
-    for (QLinkedList<rational>::iterator i = cache_queue_.begin();i != cache_queue_.end();i++) {
-      rational compare = *i;
-
-      if (!added) {
-        rational compare_diff = compare - last_time;
-
-        if (compare_diff > diff) {
-          insert_iterator = i;
-          added = true;
-        }
+    if (start_range_adj >= const_range.in()
+        && start_range_adj <= const_range.out()) {
+      append = false;
+      if (const_range.out() < end_range_adj) {
+        // Same in point but longer, extend
+        cache_queue_[i].set_out(end_range_adj);
       }
-
-      if (compare == r) {
-        contains = true;
-        break;
+      break;
+    } else if (end_range_adj <= const_range.out()
+               && end_range_adj >= const_range.in()) {
+      append = false;
+      if (const_range.in() > start_range_adj) {
+        // Same out point but longer, extend
+        cache_queue_[i].set_in(start_range_adj);
       }
+      break;
     }
+  }
 
-    if (!contains) {
-      if (added) {
-        cache_queue_.insert(insert_iterator, r);
-      } else {
-        cache_queue_.append(r);
-      }
-    }
+  if (append) {
+    cache_queue_.append(TimeRange(start_range_adj, end_range_adj));
   }
 
   CacheNext();
 }
 
-void AudioRendererProcessor::SetTimebase(const rational &timebase)
-{
-  timebase_ = timebase;
-  timebase_dbl_ = timebase_.toDouble();
-}
-
-void AudioRendererProcessor::SetParameters(const int &width,
-                                      const int &height,
-                                      const olive::PixelFormat &format,
-                                      const olive::RenderMode &mode,
-                                      const int& divider)
+void AudioRendererProcessor::SetParameters(const AudioRenderingParams& params)
 {
   // Since we're changing parameters, all the existing threads are invalid and must be removed. They will start again
   // next time this Node has to process anything.
   Stop();
 
   // Set new parameters
-  width_ = width;
-  height_ = height;
-  format_ = format;
-  mode_ = mode;
-
-  // divider's default value is 0, so we can assume if it's 0 a divider wasn't specified
-  if (divider > 0) {
-    divider_ = divider;
-  }
-
-  CalculateEffectiveDimensions();
-
-  // Regenerate the cache ID
-  GenerateCacheIDInternal();
-}
-
-void AudioRendererProcessor::SetDivider(const int &divider)
-{
-  Q_ASSERT(divider_ > 0);
-
-  Stop();
-
-  divider_ = divider;
-
-  CalculateEffectiveDimensions();
+  params_ = params;
 
   // Regenerate the cache ID
   GenerateCacheIDInternal();
@@ -193,7 +129,7 @@ void AudioRendererProcessor::Start()
   threads_.resize(background_thread_count);
 
   for (int i=0;i<threads_.size();i++) {
-    threads_[i] = std::make_shared<AudioRendererProcessThread>(this, ctx, effective_width_, effective_height_, divider_, format_, mode_);
+    threads_[i] = std::make_shared<AudioRendererProcessThread>(this, params_);
     threads_[i]->StartThread(QThread::LowPriority);
 
     // Ensure this connection is "Queued" so that it always runs in this object's threaded rather than any of the
@@ -207,46 +143,14 @@ void AudioRendererProcessor::Start()
 
   // Connect first thread (master thread) to the callback
   connect(threads_.first().get(),
-          SIGNAL(CachedFrame(RenderTexturePtr, const rational&, const QByteArray&)),
+          SIGNAL(CachedFrame(const QByteArray&, const rational&, const rational&)),
           this,
-          SLOT(ThreadCallback(RenderTexturePtr, const rational&, const QByteArray&)),
+          SLOT(ThreadCallback(const QByteArray&, const rational&, const rational&)),
           Qt::QueuedConnection);
-  connect(threads_.first().get(),
-          SIGNAL(FrameSkipped(const rational&, const QByteArray&)),
-          this,
-          SLOT(ThreadSkippedFrame(const rational&, const QByteArray&)),
-          Qt::QueuedConnection);
-
-  download_threads_.resize(background_thread_count);
-
-  for (int i=0;i<download_threads_.size();i++) {
-    // Create download thread
-    download_threads_[i] = std::make_shared<AudioRendererDownloadThread>(ctx, effective_width_, effective_height_, divider_, format_, mode_);
-    download_threads_[i]->StartThread(QThread::LowPriority);
-
-    connect(download_threads_[i].get(),
-            SIGNAL(Downloaded(const QByteArray&)),
-            this,
-            SLOT(DownloadThreadComplete(const QByteArray&)),
-            Qt::QueuedConnection);
-  }
-
-  last_download_thread_ = 0;
 
   // Restore context now that thread creation is complete
   ctx->makeCurrent(old_surface);
 
-  // Create master texture (the one sent to the viewer)
-  master_texture_ = std::make_shared<RenderTexture>();
-  master_texture_->Create(ctx, effective_width_, effective_height_, format_);
-
-  // Create internal FBO for copying textures
-  copy_buffer_.Create(ctx);
-  copy_buffer_.Attach(master_texture_);
-  copy_pipeline_ = olive::ShaderGenerator::DefaultPipeline();
-
-  cache_frame_load_buffer_.resize(PixelService::GetBufferSize(format_, effective_width_, effective_height_));
-
   started_ = true;
 }
 
@@ -258,26 +162,15 @@ void AudioRendererProcessor::Stop()
 
   started_ = false;
 
-  foreach (AudioRendererDownloadThreadPtr download_thread_, download_threads_) {
-    download_thread_->Cancel();
-  }
-  download_threads_.clear();
-
   foreach (AudioRendererProcessThreadPtr process_thread, threads_) {
     process_thread->Cancel();
   }
   threads_.clear();
-
-  copy_buffer_.Destroy();
-  master_texture_ = nullptr;
-  copy_pipeline_ = nullptr;
-
-  cache_frame_load_buffer_.clear();
 }
 
 void AudioRendererProcessor::GenerateCacheIDInternal()
 {
-  if (cache_name_.isEmpty() || effective_width_ == 0 || effective_height_ == 0) {
+  if (cache_name_.isEmpty() || !params_.is_valid()) {
     return;
   }
 
@@ -285,10 +178,9 @@ void AudioRendererProcessor::GenerateCacheIDInternal()
   QCryptographicHash hash(QCryptographicHash::Sha1);
   hash.addData(cache_name_.toUtf8());
   hash.addData(QString::number(cache_time_).toUtf8());
-  hash.addData(QString::number(width_).toUtf8());
-  hash.addData(QString::number(height_).toUtf8());
-  hash.addData(QString::number(format_).toUtf8());
-  hash.addData(QString::number(divider_).toUtf8());
+  hash.addData(QString::number(params_.sample_rate()).toUtf8());
+  hash.addData(QString::number(params_.channel_layout()).toUtf8());
+  hash.addData(QString::number(params_.format()).toUtf8());
 
   QByteArray bytes = hash.result();
   cache_id_ = bytes.toHex();
@@ -303,9 +195,9 @@ void AudioRendererProcessor::CacheNext()
   // Make sure cache has started
   Start();
 
-  rational cache_frame = cache_queue_.takeFirst();
+  TimeRange cache_frame = cache_queue_.takeFirst();
 
-  qDebug() << "Caching" << cache_frame.toDouble();
+  qDebug() << "Caching" << cache_frame.in().toDouble() << "-" << cache_frame.out().toDouble();
 
   threads_.first()->Queue(NodeDependency(viewer_node_->texture_input()->get_connected_output(), cache_frame), true, false);
 
@@ -317,90 +209,25 @@ QString AudioRendererProcessor::CachePathName(const QByteArray &hash)
   QDir this_cache_dir = QDir(GetMediaCacheLocation()).filePath(cache_id_);
   this_cache_dir.mkpath(".");
 
-  QString filename = QString("%1.exr").arg(QString(hash.toHex()));
+  QString filename = QString("%1.pcm").arg(QString(hash.toHex()));
 
   return this_cache_dir.filePath(filename);
 }
 
-void AudioRendererProcessor::DeferMap(const rational &time, const QByteArray &hash)
-{
-  deferred_maps_.append({time, hash});
-}
-
-bool AudioRendererProcessor::HasHash(const QByteArray &hash)
-{
-  return QFileInfo::exists(CachePathName(hash));
-}
-
-bool AudioRendererProcessor::IsCaching(const QByteArray &hash)
-{
-  cache_hash_list_mutex_.lock();
-
-  bool is_caching = cache_hash_list_.contains(hash);
-
-  cache_hash_list_mutex_.unlock();
-
-  return is_caching;
-}
-
-bool AudioRendererProcessor::TryCache(const QByteArray &hash)
-{
-  cache_hash_list_mutex_.lock();
-
-  bool is_caching = cache_hash_list_.contains(hash);
-
-  if (!is_caching) {
-    cache_hash_list_.append(hash);
-  }
-
-  cache_hash_list_mutex_.unlock();
-
-  return !is_caching;
-}
-
-void AudioRendererProcessor::CalculateEffectiveDimensions()
-{
-  effective_width_ = width_ / divider_;
-  effective_height_ = height_ / divider_;
-}
-
-void AudioRendererProcessor::ThreadCallback(RenderTexturePtr texture, const rational& time, const QByteArray& hash)
+void AudioRendererProcessor::ThreadCallback(const QByteArray& samples, const rational& in, const rational& out)
 {
   // Threads are all done now, time to proceed
   caching_ = false;
 
-  DeferMap(time, hash);
+  int start_offset = params_.time_to_bytes(in);
+  int end_offset = params_.time_to_bytes(out);
 
-  if (texture != nullptr) {
-    // We received a texture, time to start downloading it
-    QString fn = CachePathName(hash);
-
-    download_threads_[last_download_thread_%download_threads_.size()]->Queue(texture,
-                                                                             fn,
-                                                                             hash);
-
-    last_download_thread_++;
-  } else {
-    // There was no texture here, we must update the viewer
-    DownloadThreadComplete(hash);
+  // Ensure sample cache is at least large enough for this
+  if (sample_cache_.size() < end_offset) {
+    sample_cache_.resize(end_offset);
   }
 
-  // If the connected output is using this time, signal it to update
-  if (last_time_requested_ == time) {
-    copy_buffer_.Bind();
-    texture->Bind();
-
-    QOpenGLContext::currentContext()->functions()->glViewport(0, 0, master_texture_->width(), master_texture_->height());
-
-    olive::gl::Blit(copy_pipeline_);
-
-    texture->Release();
-    copy_buffer_.Release();
-
-    push_time_ = time;
-
-    emit CachedFrameReady(time);
-  }
+  sample_cache_.replace(start_offset, samples.size(), samples);
 
   CacheNext();
 }
@@ -415,107 +242,53 @@ void AudioRendererProcessor::ThreadRequestSibling(NodeDependency dep)
   }
 }
 
-void AudioRendererProcessor::ThreadSkippedFrame(const rational& time, const QByteArray& hash)
-{
-  caching_ = false;
-
-  DeferMap(time, hash);
-
-  if (!IsCaching(hash)) {
-    DownloadThreadComplete(hash);
-
-    // Signal output to update value
-    emit CachedFrameReady(time);
-  }
-
-  CacheNext();
-}
-
-void AudioRendererProcessor::DownloadThreadComplete(const QByteArray &hash)
-{
-  cache_hash_list_mutex_.lock();
-  cache_hash_list_.removeAll(hash);
-  cache_hash_list_mutex_.unlock();
-
-  for (int i=0;i<deferred_maps_.size();i++) {
-    const HashTimeMapping& deferred = deferred_maps_.at(i);
-
-    if (deferred_maps_.at(i).hash == hash) {
-      // Insert into hash map
-      time_hash_map_.insert(deferred.time, deferred.hash);
-
-      deferred_maps_.removeAt(i);
-      i--;
-    }
-  }
-}
-
 AudioRendererThreadBase* AudioRendererProcessor::CurrentThread()
 {
   return dynamic_cast<AudioRendererThreadBase*>(QThread::currentThread());
 }
 
-RenderInstance *AudioRendererProcessor::CurrentInstance()
+AudioParams *AudioRendererProcessor::CurrentInstance()
 {
   AudioRendererThreadBase* thread = CurrentThread();
 
   if (thread != nullptr) {
-    return thread->render_instance();
+    return thread->params();
   }
 
   return nullptr;
 }
 
-RenderTexturePtr AudioRendererProcessor::GetCachedFrame(const rational &time)
+QByteArray AudioRendererProcessor::GetCachedSamples(const rational &in, const rational &out)
 {
-  last_time_requested_ = time;
-
-  if (push_time_ >= 0) {
-    rational temp_push_time = push_time_;
-    push_time_ = -1;
-
-    if (time == temp_push_time) {
-      return master_texture_;
-    }
-  }
-
-  if (viewer_node_ == nullptr) {
+  if (viewer_node_ == nullptr || in == out) {
     // Nothing is connected - nothing to show or render
     return nullptr;
   }
 
+  if (!params_.is_valid()) {
+    qWarning() << "Invalid parameters";
+    return nullptr;
+  }
+
   if (cache_id_.isEmpty()) {
-    qWarning() << "RendererProcessor has no cache ID";
+    qWarning() << "No cache ID";
     return nullptr;
   }
 
-  if (timebase_.isNull()) {
-    qWarning() << "RendererProcessor has no timebase";
+  if (out < in || in < 0 || out < 0) {
+    qWarning() << "Invalid time requested";
     return nullptr;
   }
 
-  // Find frame in map
-  if (time_hash_map_.contains(time)) {
-    QString fn = CachePathName(time_hash_map_[time]);
+  int start_offset = qMin(params_.time_to_bytes(in), sample_cache_.size());
+  int end_offset = qMin(params_.time_to_bytes(out), sample_cache_.size());
+  int length = end_offset - start_offset;
 
-    if (QFileInfo::exists(fn)) {
-      auto in = OIIO::ImageInput::open(fn.toStdString());
-
-      if (in) {
-        in->read_image(PixelService::GetPixelFormatInfo(format_).oiio_desc, cache_frame_load_buffer_.data());
-
-        in->close();
-
-        master_texture_->Upload(cache_frame_load_buffer_.data());
-
-        return master_texture_;
-      } else {
-        qWarning() << "OIIO Error:" << OIIO::geterror().c_str();
-      }
-    }
+  if (length == 0) {
+    return nullptr;
   }
 
-  return nullptr;
+  return sample_cache_.mid(start_offset, length);
 }
 
 void AudioRendererProcessor::SetViewerNode(ViewerOutput *viewer)
@@ -530,9 +303,6 @@ void AudioRendererProcessor::SetViewerNode(ViewerOutput *viewer)
     connect(viewer_node_, SIGNAL(TextureChangedBetween(const rational&, const rational&)), this, SLOT(InvalidateCache(const rational&, const rational&)));
 
     // FIXME: Hardcoded format and mode
-    SetParameters(viewer_node_->ViewerWidth(),
-                  viewer_node_->ViewerHeight(),
-                  olive::PIX_FMT_RGBA16F,
-                  olive::kOffline);
+    AudioRenderingParams(viewer_node_->audio_params(), olive::SAMPLE_FMT_FLT);
   }
 }
diff --git a/app/render/audio/audiorenderer.h b/app/render/audio/audiorenderer.h
index b3f047d46..e19ca4c49 100644
--- a/app/render/audio/audiorenderer.h
+++ b/app/render/audio/audiorenderer.h
@@ -24,6 +24,7 @@
 #include <QLinkedList>
 #include <QOpenGLTexture>
 
+#include "common/timerange.h"
 #include "node/output/viewer/viewer.h"
 #include "render/pixelformat.h"
 #include "render/rendermodes.h"
@@ -49,8 +50,6 @@ public:
 
   void SetCacheName(const QString& s);
 
-  void SetTimebase(const rational& timebase);
-
   /**
    * @brief Set parameters of the Renderer
    *
@@ -69,28 +68,7 @@ public:
    *
    * Buffer pixel format
    */
-  void SetParameters(const int& width,
-                     const int& height,
-                     const olive::PixelFormat& format,
-                     const olive::RenderMode& mode,
-                     const int &divider = 0);
-
-  void SetDivider(const int& divider);
-
-  /**
-   * @brief Return whether a frame with this hash already exists
-   */
-  bool HasHash(const QByteArray& hash);
-
-  /**
-   * @brief Return whether a frame is currently being cached
-   */
-  bool IsCaching(const QByteArray& hash);
-
-  /**
-   * @brief Check if a frame is currently being cached, and if not reserve it
-   */
-  bool TryCache(const QByteArray& hash);
+  void SetParameters(const AudioRenderingParams &params);
 
   /**
    * @brief Return current instance of a RenderThread (or nullptr if there is none)
@@ -100,21 +78,13 @@ public:
    */
   static AudioRendererThreadBase* CurrentThread();
 
-  static RenderInstance* CurrentInstance();
+  static AudioParams* CurrentInstance();
 
-  RenderTexturePtr GetCachedFrame(const rational& time);
+  QByteArray GetCachedSamples(const rational& in, const rational& out);
 
   void SetViewerNode(ViewerOutput* viewer);
 
-signals:
-  void CachedFrameReady(const rational& time);
-
 private:
-  struct HashTimeMapping {
-    rational time;
-    QByteArray hash;
-  };
-
   /**
    * @brief Allocate and start the multithreaded backend
    */
@@ -137,15 +107,11 @@ private:
    */
   void CacheNext();
 
-  bool ShouldPushTexture(const rational &time);
-
   /**
    * @brief Return the path of the cached image at this time
    */
   QString CachePathName(const QByteArray &hash);
 
-  void DeferMap(const rational &time, const QByteArray &hash);
-
   /**
    * @brief Internal list of RenderProcessThreads
    */
@@ -156,63 +122,28 @@ private:
    */
   bool started_;
 
-  int width_;
-  int height_;
+  AudioRenderingParams params_;
 
-  void CalculateEffectiveDimensions();
-
-  int divider_;
-  int effective_width_;
-  int effective_height_;
-
-  olive::PixelFormat format_;
-
-  olive::RenderMode mode_;
-
-  rational last_time_requested_;
-
-  rational timebase_;
-  double timebase_dbl_;
-
-  QLinkedList<rational> cache_queue_;
+  QList<TimeRange> cache_queue_;
   QString cache_name_;
   qint64 cache_time_;
   QString cache_id_;
 
   bool caching_;
-  QVector<uchar*> cache_frame_load_buffer_;
-
-  QVector<AudioRendererDownloadThreadPtr> download_threads_;
-  int last_download_thread_;
-
-  RenderTexturePtr master_texture_;
-  rational push_time_;
-
-  RenderFramebuffer copy_buffer_;
-  ShaderPtr copy_pipeline_;
-
-  QMap<rational, QByteArray> time_hash_map_;
-
-  QMutex cache_hash_list_mutex_;
-  QVector<QByteArray> cache_hash_list_;
-
-  QList<HashTimeMapping> deferred_maps_;
 
   bool starting_;
 
   ViewerOutput* viewer_node_;
 
+  QByteArray sample_cache_;
+
 private slots:
   void InvalidateCache(const rational &start_range, const rational &end_range);
 
-  void ThreadCallback(RenderTexturePtr texture, const rational& time, const QByteArray& hash);
+  void ThreadCallback(const QByteArray& samples, const rational& in, const rational &out);
 
   void ThreadRequestSibling(NodeDependency dep);
 
-  void ThreadSkippedFrame(const rational &time, const QByteArray &hash);
-
-  void DownloadThreadComplete(const QByteArray &hash);
-
 };
 
 #endif // AUDIORENDERER_H
diff --git a/app/render/audio/audiorendererdownloadthread.cpp b/app/render/audio/audiorendererdownloadthread.cpp
index fc69ebeec..d6bf0538f 100644
--- a/app/render/audio/audiorendererdownloadthread.cpp
+++ b/app/render/audio/audiorendererdownloadthread.cpp
@@ -7,7 +7,7 @@
 #include "common/define.h"
 #include "render/pixelservice.h"
 
-AudioRendererDownloadThread::AudioRendererDownloadThread(QOpenGLContext *share_ctx,
+/*AudioRendererDownloadThread::AudioRendererDownloadThread(QOpenGLContext *share_ctx,
                                                          const int &width,
                                                          const int &height,
                                                          const int &divider,
@@ -125,4 +125,4 @@ void AudioRendererDownloadThread::ProcessLoop()
   }
 
   f->glDeleteFramebuffers(1, &read_buffer_);
-}
+}*/
diff --git a/app/render/audio/audiorendererdownloadthread.h b/app/render/audio/audiorendererdownloadthread.h
index 7cb2222c9..f77a3eb99 100644
--- a/app/render/audio/audiorendererdownloadthread.h
+++ b/app/render/audio/audiorendererdownloadthread.h
@@ -3,7 +3,7 @@
 
 #include "audiorendererthreadbase.h"
 
-class AudioRendererDownloadThread : public AudioRendererThreadBase
+/*class AudioRendererDownloadThread : public AudioRendererThreadBase
 {
   Q_OBJECT
 public:
@@ -44,6 +44,6 @@ private:
 
 };
 
-using AudioRendererDownloadThreadPtr = std::shared_ptr<AudioRendererDownloadThread>;
+using AudioRendererDownloadThreadPtr = std::shared_ptr<AudioRendererDownloadThread>;*/
 
 #endif // AUDIORENDERERDOWNLOADTHREAD_H
diff --git a/app/render/audio/audiorendererprocessthread.cpp b/app/render/audio/audiorendererprocessthread.cpp
index 6e8970086..53ace48af 100644
--- a/app/render/audio/audiorendererprocessthread.cpp
+++ b/app/render/audio/audiorendererprocessthread.cpp
@@ -23,13 +23,8 @@
 #include "audiorenderer.h"
 
 AudioRendererProcessThread::AudioRendererProcessThread(AudioRendererProcessor* parent,
-                                             QOpenGLContext *share_ctx,
-                                             const int &width,
-                                             const int &height,
-                                             const int &divider,
-                                             const olive::PixelFormat &format,
-                                             const olive::RenderMode &mode) :
-  AudioRendererThreadBase(share_ctx, width, height, divider, format, mode),
+                                                       const AudioRenderingParams &params) :
+  AudioRendererThreadBase(params),
   parent_(parent),
   cancelled_(false)
 {
@@ -93,49 +88,20 @@ void AudioRendererProcessThread::ProcessLoop()
     NodeOutput* output_to_process = path_.node();
     Node* node_to_process = output_to_process->parent();
 
-    texture_ = nullptr;
-
     QList<Node*> all_deps;
-    bool has_hash = false;
-    bool can_cache = true;
 
-    if (!sibling_) {
-      node_to_process->Lock();
+    QList<NodeDependency> deps = node_to_process->RunDependencies(output_to_process, path_.in());
 
-      all_deps = node_to_process->GetDependencies();
-      foreach (Node* dep, all_deps) {
-        dep->Lock();
-      }
-
-      // Check hash
-      QCryptographicHash hasher(QCryptographicHash::Sha1);
-      node_to_process->Hash(&hasher, output_to_process, path_.time());
-      hash_ = hasher.result();
-
-      has_hash = parent_->HasHash(hash_);
-      can_cache = false;
-    }
-
-    if (!has_hash){
-
-      if ((can_cache = parent_->TryCache(hash_))) {
-
-        QList<NodeDependency> deps = node_to_process->RunDependencies(output_to_process, path_.time());
-
-        // Ask for other threads to run these deps while we're here
-        if (!deps.isEmpty()) {
-          for (int i=1;i<deps.size();i++) {
-            emit RequestSibling(deps.at(i));
-          }
-        }
-
-        // Get the requested value
-        texture_ = output_to_process->get_value(path_.time(), path_.time()).value<RenderTexturePtr>();
-
-        render_instance()->context()->functions()->glFinish();
+    // Ask for other threads to run these deps while we're here
+    if (!deps.isEmpty()) {
+      for (int i=1;i<deps.size();i++) {
+        emit RequestSibling(deps.at(i));
       }
     }
 
+    // Get the requested value
+    QByteArray samples = output_to_process->get_value(path_.in(), path_.out()).toByteArray();
+
     if (!sibling_) {
       foreach (Node* dep, all_deps) {
         dep->Unlock();
@@ -144,12 +110,7 @@ void AudioRendererProcessThread::ProcessLoop()
       node_to_process->Unlock();
     }
 
-    if (can_cache) {
-      // We cached this frame, signal that it will need to be downloaded to disk
-      emit CachedFrame(texture_, path_.time(), hash_);
-    } else {
-      // This hash already exists, no need to cache, just map it
-      emit FrameSkipped(path_.time(), hash_);
-    }
+    // Signal that we cached some samples
+    emit CachedSamples(samples, path_.in(), path_.out());
   }
 }
diff --git a/app/render/audio/audiorendererprocessthread.h b/app/render/audio/audiorendererprocessthread.h
index a02ab0643..91b728c4f 100644
--- a/app/render/audio/audiorendererprocessthread.h
+++ b/app/render/audio/audiorendererprocessthread.h
@@ -30,11 +30,7 @@ class AudioRendererProcessThread : public AudioRendererThreadBase
   Q_OBJECT
 public:
   AudioRendererProcessThread(AudioRendererProcessor* parent,
-                        QOpenGLContext* share_ctx,
-                        const int& width,
-                        const int& height, const int &divider,
-                        const olive::PixelFormat& format,
-                        const olive::RenderMode& mode);
+                             const AudioRenderingParams &params);
 
   bool Queue(const NodeDependency &dep, bool wait, bool sibling);
 
@@ -47,19 +43,13 @@ protected:
 signals:
   void RequestSibling(NodeDependency dep);
 
-  void CachedFrame(RenderTexturePtr texture, const rational& time, const QByteArray& hash);
-
-  void FrameSkipped(const rational& time, const QByteArray& hash);
+  void CachedSamples(const QByteArray& samples, const rational& in, const rational& out);
 
 private:
   AudioRendererProcessor* parent_;
 
   NodeDependency path_;
 
-  QByteArray hash_;
-
-  RenderTexturePtr texture_;
-
   QAtomicInt cancelled_;
 
   bool sibling_;
diff --git a/app/render/audio/audiorendererthreadbase.cpp b/app/render/audio/audiorendererthreadbase.cpp
index e1544c424..7045de398 100644
--- a/app/render/audio/audiorendererthreadbase.cpp
+++ b/app/render/audio/audiorendererthreadbase.cpp
@@ -22,16 +22,14 @@
 
 #include <QDebug>
 
-AudioRendererThreadBase::AudioRendererThreadBase(QOpenGLContext *share_ctx, const int &width, const int &height, const int &divider, const olive::PixelFormat &format, const olive::RenderMode &mode) :
-  share_ctx_(share_ctx),
-  render_instance_(width, height, divider, format, mode)
+AudioRendererThreadBase::AudioRendererThreadBase(const AudioRenderingParams &params) :
+  params_(params)
 {
-  connect(share_ctx_, SIGNAL(aboutToBeDestroyed()), this, SLOT(Cancel()));
 }
 
-RenderInstance *AudioRendererThreadBase::render_instance()
+AudioParams *AudioRendererThreadBase::params()
 {
-  return &render_instance_;
+  return &params_;
 }
 
 void AudioRendererThreadBase::run()
@@ -39,23 +37,11 @@ void AudioRendererThreadBase::run()
   // Lock mutex for main loop
   mutex_.lock();
 
-  render_instance_.SetShareContext(share_ctx_);
-
-  // Allocate and create resources
-  bool started = render_instance_.Start();
-
   // Signal that main thread can continue now
   WakeCaller();
 
-  if (started) {
-
-    // Main loop (use Cancel() to exit it)
-    ProcessLoop();
-
-  }
-
-  // Free all resources
-  render_instance_.Stop();
+  // Main loop (use Cancel() to exit it)
+  ProcessLoop();
 
   // Unlock mutex before exiting
   mutex_.unlock();
diff --git a/app/render/audio/audiorendererthreadbase.h b/app/render/audio/audiorendererthreadbase.h
index 5e6e72872..b5ddfb8d3 100644
--- a/app/render/audio/audiorendererthreadbase.h
+++ b/app/render/audio/audiorendererthreadbase.h
@@ -26,21 +26,16 @@
 #include <QThread>
 #include <QWaitCondition>
 
+#include "audioparams.h"
 #include "node/node.h"
-#include "render/renderinstance.h"
 
 class AudioRendererThreadBase : public QThread
 {
   Q_OBJECT
 public:
-  AudioRendererThreadBase(QOpenGLContext* share_ctx,
-                     const int& width,
-                     const int& height,
-                     const int& divider,
-                     const olive::PixelFormat& format,
-                     const olive::RenderMode& mode);
+  AudioRendererThreadBase(const AudioRenderingParams &params);
 
-  RenderInstance* render_instance();
+  AudioParams* params();
 
   void StartThread(Priority priority = InheritPriority);
 
@@ -61,9 +56,7 @@ protected:
 private:
   void WakeCaller();
 
-  QOpenGLContext* share_ctx_;
-
-  RenderInstance render_instance_;
+  AudioRenderingParams params_;
 
 };
 
diff --git a/app/render/renderinstance.cpp b/app/render/renderinstance.cpp
index c22f80765..e575e8d17 100644
--- a/app/render/renderinstance.cpp
+++ b/app/render/renderinstance.cpp
@@ -24,17 +24,9 @@
 
 #include "render/gl/shadergenerators.h"
 
-RenderInstance::RenderInstance(const int& width,
-                               const int& height,
-                               const int& divider,
-                               const olive::PixelFormat& format,
-                               const olive::RenderMode& mode) :
+RenderInstance::RenderInstance(const VideoRenderingParams& params) :
   share_ctx_(nullptr),
-  width_(width),
-  height_(height),
-  format_(format),
-  mode_(mode),
-  divider_(divider)
+  params_(params)
 {
   // Create offscreen surface
   surface_.create();
@@ -82,7 +74,7 @@ bool RenderInstance::Start()
   buffer_.Create(ctx_);
 
   // Set viewport to the compositing dimensions
-  ctx_->functions()->glViewport(0, 0, width_, height_);
+  ctx_->functions()->glViewport(0, 0, params_.width(), params_.height());
   ctx_->functions()->glEnable(GL_BLEND);
 
   // Set up default pipeline
@@ -122,29 +114,9 @@ QOpenGLContext *RenderInstance::context()
   return ctx_;
 }
 
-const int &RenderInstance::width() const
+const VideoRenderingParams &RenderInstance::params() const
 {
-  return width_;
-}
-
-const int &RenderInstance::height() const
-{
-  return height_;
-}
-
-const int &RenderInstance::divider() const
-{
-  return divider_;
-}
-
-const olive::PixelFormat &RenderInstance::format() const
-{
-  return format_;
-}
-
-const olive::RenderMode &RenderInstance::mode() const
-{
-  return mode_;
+  return params_;
 }
 
 ShaderPtr RenderInstance::default_pipeline() const
diff --git a/app/render/renderinstance.h b/app/render/renderinstance.h
index 12e488cf0..4229b9f83 100644
--- a/app/render/renderinstance.h
+++ b/app/render/renderinstance.h
@@ -28,6 +28,7 @@
 #include "render/gl/shaderptr.h"
 #include "render/renderframebuffer.h"
 #include "render/rendermodes.h"
+#include "render/videoparams.h"
 
 /**
  * @brief An object containing all resources necessary for each thread to support hardware accelerated rendering
@@ -40,11 +41,7 @@
 class RenderInstance : public QObject
 {
 public:
-  RenderInstance(const int& width,
-                 const int& height,
-                 const int& divider,
-                 const olive::PixelFormat& format,
-                 const olive::RenderMode& mode);
+  RenderInstance(const VideoRenderingParams &params);
 
   virtual ~RenderInstance() override;
 
@@ -80,15 +77,7 @@ public:
 
   QOpenGLContext* context();
 
-  const int& width() const;
-
-  const int& height() const;
-
-  const int& divider() const;
-
-  const olive::PixelFormat& format() const;
-
-  const olive::RenderMode& mode() const;
+  const VideoRenderingParams& params() const;
 
   ShaderPtr default_pipeline() const;
 
@@ -101,15 +90,7 @@ private:
 
   RenderFramebuffer buffer_;
 
-  int width_;
-
-  int height_;
-
-  olive::PixelFormat format_;
-
-  olive::RenderMode mode_;
-
-  int divider_;
+  VideoRenderingParams params_;
 
   ShaderPtr default_pipeline_;
 };
diff --git a/app/render/video/videorenderer.cpp b/app/render/video/videorenderer.cpp
index fb694892c..3bda31620 100644
--- a/app/render/video/videorenderer.cpp
+++ b/app/render/video/videorenderer.cpp
@@ -36,9 +36,6 @@
 VideoRendererProcessor::VideoRendererProcessor(QObject *parent) :
   QObject(parent),
   started_(false),
-  width_(0),
-  height_(0),
-  divider_(1),
   caching_(false),
   push_time_(-1),
   starting_(false),
@@ -63,7 +60,7 @@ void VideoRendererProcessor::SetCacheName(const QString &s)
 
 void VideoRendererProcessor::InvalidateCache(const rational &start_range, const rational &end_range)
 {
-  if (timebase_.isNull()) {
+  if (!params_.is_valid()) {
     return;
   }
 
@@ -78,11 +75,11 @@ void VideoRendererProcessor::InvalidateCache(const rational &start_range, const
 
   // Snap start_range to timebase
   double start_range_dbl = start_range_adj.toDouble();
-  double start_range_numf = start_range_dbl * static_cast<double>(timebase_.denominator());
-  int64_t start_range_numround = qFloor(start_range_numf/static_cast<double>(timebase_.numerator())) * timebase_.numerator();
-  rational true_start_range(start_range_numround, timebase_.denominator());
+  double start_range_numf = start_range_dbl * static_cast<double>(params_.time_base().denominator());
+  int64_t start_range_numround = qFloor(start_range_numf/static_cast<double>(params_.time_base().numerator())) * params_.time_base().numerator();
+  rational true_start_range(start_range_numround, params_.time_base().denominator());
 
-  for (rational r=true_start_range;r<=end_range_adj;r+=timebase_) {
+  for (rational r=true_start_range;r<=end_range_adj;r+=params_.time_base()) {
     // Try to order the queue from closest to the playhead to furthest
     rational last_time = last_time_requested_;
 
@@ -129,48 +126,14 @@ void VideoRendererProcessor::InvalidateCache(const rational &start_range, const
   CacheNext();
 }
 
-void VideoRendererProcessor::SetTimebase(const rational &timebase)
-{
-  timebase_ = timebase;
-  timebase_dbl_ = timebase_.toDouble();
-}
-
-void VideoRendererProcessor::SetParameters(const int &width,
-                                      const int &height,
-                                      const olive::PixelFormat &format,
-                                      const olive::RenderMode &mode,
-                                      const int& divider)
+void VideoRendererProcessor::SetParameters(const VideoRenderingParams& params)
 {
   // Since we're changing parameters, all the existing threads are invalid and must be removed. They will start again
   // next time this Node has to process anything.
   Stop();
 
   // Set new parameters
-  width_ = width;
-  height_ = height;
-  format_ = format;
-  mode_ = mode;
-
-  // divider's default value is 0, so we can assume if it's 0 a divider wasn't specified
-  if (divider > 0) {
-    divider_ = divider;
-  }
-
-  CalculateEffectiveDimensions();
-
-  // Regenerate the cache ID
-  GenerateCacheIDInternal();
-}
-
-void VideoRendererProcessor::SetDivider(const int &divider)
-{
-  Q_ASSERT(divider_ > 0);
-
-  Stop();
-
-  divider_ = divider;
-
-  CalculateEffectiveDimensions();
+  params_ = params;
 
   // Regenerate the cache ID
   GenerateCacheIDInternal();
@@ -193,7 +156,7 @@ void VideoRendererProcessor::Start()
   threads_.resize(background_thread_count);
 
   for (int i=0;i<threads_.size();i++) {
-    threads_[i] = std::make_shared<RendererProcessThread>(this, ctx, effective_width_, effective_height_, divider_, format_, mode_);
+    threads_[i] = std::make_shared<RendererProcessThread>(this, ctx, params_);
     threads_[i]->StartThread(QThread::LowPriority);
 
     // Ensure this connection is "Queued" so that it always runs in this object's threaded rather than any of the
@@ -221,7 +184,7 @@ void VideoRendererProcessor::Start()
 
   for (int i=0;i<download_threads_.size();i++) {
     // Create download thread
-    download_threads_[i] = std::make_shared<VideoRendererDownloadThread>(ctx, effective_width_, effective_height_, divider_, format_, mode_);
+    download_threads_[i] = std::make_shared<VideoRendererDownloadThread>(ctx, params_);
     download_threads_[i]->StartThread(QThread::LowPriority);
 
     connect(download_threads_[i].get(),
@@ -238,14 +201,14 @@ void VideoRendererProcessor::Start()
 
   // Create master texture (the one sent to the viewer)
   master_texture_ = std::make_shared<RenderTexture>();
-  master_texture_->Create(ctx, effective_width_, effective_height_, format_);
+  master_texture_->Create(ctx, params_.effective_width(), params_.effective_height(), params_.format());
 
   // Create internal FBO for copying textures
   copy_buffer_.Create(ctx);
   copy_buffer_.Attach(master_texture_);
   copy_pipeline_ = olive::ShaderGenerator::DefaultPipeline();
 
-  cache_frame_load_buffer_.resize(PixelService::GetBufferSize(format_, effective_width_, effective_height_));
+  cache_frame_load_buffer_.resize(PixelService::GetBufferSize(params_.format(), params_.effective_width(), params_.effective_height()));
 
   started_ = true;
 }
@@ -277,7 +240,7 @@ void VideoRendererProcessor::Stop()
 
 void VideoRendererProcessor::GenerateCacheIDInternal()
 {
-  if (cache_name_.isEmpty() || effective_width_ == 0 || effective_height_ == 0) {
+  if (cache_name_.isEmpty() || !params_.is_valid()) {
     return;
   }
 
@@ -285,10 +248,10 @@ void VideoRendererProcessor::GenerateCacheIDInternal()
   QCryptographicHash hash(QCryptographicHash::Sha1);
   hash.addData(cache_name_.toUtf8());
   hash.addData(QString::number(cache_time_).toUtf8());
-  hash.addData(QString::number(width_).toUtf8());
-  hash.addData(QString::number(height_).toUtf8());
-  hash.addData(QString::number(format_).toUtf8());
-  hash.addData(QString::number(divider_).toUtf8());
+  hash.addData(QString::number(params_.width()).toUtf8());
+  hash.addData(QString::number(params_.height()).toUtf8());
+  hash.addData(QString::number(params_.format()).toUtf8());
+  hash.addData(QString::number(params_.divider()).toUtf8());
 
   QByteArray bytes = hash.result();
   cache_id_ = bytes.toHex();
@@ -307,7 +270,7 @@ void VideoRendererProcessor::CacheNext()
 
   qDebug() << "Caching" << cache_frame.toDouble();
 
-  threads_.first()->Queue(NodeDependency(viewer_node_->texture_input()->get_connected_output(), cache_frame), true, false);
+  threads_.first()->Queue(NodeDependency(viewer_node_->texture_input()->get_connected_output(), cache_frame, cache_frame), true, false);
 
   caching_ = true;
 }
@@ -358,12 +321,6 @@ bool VideoRendererProcessor::TryCache(const QByteArray &hash)
   return !is_caching;
 }
 
-void VideoRendererProcessor::CalculateEffectiveDimensions()
-{
-  effective_width_ = width_ / divider_;
-  effective_height_ = height_ / divider_;
-}
-
 void VideoRendererProcessor::ThreadCallback(RenderTexturePtr texture, const rational& time, const QByteArray& hash)
 {
   // Threads are all done now, time to proceed
@@ -485,12 +442,12 @@ RenderTexturePtr VideoRendererProcessor::GetCachedFrame(const rational &time)
   }
 
   if (cache_id_.isEmpty()) {
-    qWarning() << "RendererProcessor has no cache ID";
+    qWarning() << "No cache ID";
     return nullptr;
   }
 
-  if (timebase_.isNull()) {
-    qWarning() << "RendererProcessor has no timebase";
+  if (!params_.is_valid()) {
+    qWarning() << "Invalid parameters";
     return nullptr;
   }
 
@@ -502,7 +459,7 @@ RenderTexturePtr VideoRendererProcessor::GetCachedFrame(const rational &time)
       auto in = OIIO::ImageInput::open(fn.toStdString());
 
       if (in) {
-        in->read_image(PixelService::GetPixelFormatInfo(format_).oiio_desc, cache_frame_load_buffer_.data());
+        in->read_image(PixelService::GetPixelFormatInfo(params_.format()).oiio_desc, cache_frame_load_buffer_.data());
 
         in->close();
 
@@ -529,10 +486,7 @@ void VideoRendererProcessor::SetViewerNode(ViewerOutput *viewer)
   if (viewer_node_ != nullptr) {
     connect(viewer_node_, SIGNAL(TextureChangedBetween(const rational&, const rational&)), this, SLOT(InvalidateCache(const rational&, const rational&)));
 
-    // FIXME: Hardcoded format and mode
-    SetParameters(viewer_node_->ViewerWidth(),
-                  viewer_node_->ViewerHeight(),
-                  olive::PIX_FMT_RGBA16F,
-                  olive::kOffline);
+    // FIXME: Hardcoded format, mode, and divider
+    SetParameters(VideoRenderingParams(viewer_node_->video_params(), olive::PIX_FMT_RGBA16F, olive::kOffline, 2));
   }
 }
diff --git a/app/render/video/videorenderer.h b/app/render/video/videorenderer.h
index d12f3f125..0eae2479f 100644
--- a/app/render/video/videorenderer.h
+++ b/app/render/video/videorenderer.h
@@ -49,8 +49,6 @@ public:
 
   void SetCacheName(const QString& s);
 
-  void SetTimebase(const rational& timebase);
-
   /**
    * @brief Set parameters of the Renderer
    *
@@ -69,13 +67,7 @@ public:
    *
    * Buffer pixel format
    */
-  void SetParameters(const int& width,
-                     const int& height,
-                     const olive::PixelFormat& format,
-                     const olive::RenderMode& mode,
-                     const int &divider = 0);
-
-  void SetDivider(const int& divider);
+  void SetParameters(const VideoRenderingParams &params);
 
   /**
    * @brief Return whether a frame with this hash already exists
@@ -156,24 +148,10 @@ private:
    */
   bool started_;
 
-  int width_;
-  int height_;
-
-  void CalculateEffectiveDimensions();
-
-  int divider_;
-  int effective_width_;
-  int effective_height_;
-
-  olive::PixelFormat format_;
-
-  olive::RenderMode mode_;
+  VideoRenderingParams params_;
 
   rational last_time_requested_;
 
-  rational timebase_;
-  double timebase_dbl_;
-
   QLinkedList<rational> cache_queue_;
   QString cache_name_;
   qint64 cache_time_;
diff --git a/app/render/video/videorendererdownloadthread.cpp b/app/render/video/videorendererdownloadthread.cpp
index 0d9966cdb..f936495b9 100644
--- a/app/render/video/videorendererdownloadthread.cpp
+++ b/app/render/video/videorendererdownloadthread.cpp
@@ -8,12 +8,8 @@
 #include "render/pixelservice.h"
 
 VideoRendererDownloadThread::VideoRendererDownloadThread(QOpenGLContext *share_ctx,
-                                                         const int &width,
-                                                         const int &height,
-                                                         const int &divider,
-                                                         const olive::PixelFormat &format,
-                                                         const olive::RenderMode &mode) :
-  VideoRendererThreadBase(share_ctx, width, height, divider, format, mode),
+                                                         const VideoRenderingParams& params) :
+  VideoRendererThreadBase(share_ctx, params),
   cancelled_(false)
 {
 }
@@ -49,17 +45,17 @@ void VideoRendererDownloadThread::ProcessLoop()
 
   DownloadQueueEntry entry;
 
-  int buffer_size = PixelService::GetBufferSize(render_instance()->format(),
-                                                render_instance()->width(),
-                                                render_instance()->height());
+  int buffer_size = PixelService::GetBufferSize(render_instance()->params().format(),
+                                                render_instance()->params().width(),
+                                                render_instance()->params().height());
 
   QVector<uchar> data_buffer;
   data_buffer.resize(buffer_size);
 
-  PixelFormatInfo format_info = PixelService::GetPixelFormatInfo(render_instance()->format());
+  PixelFormatInfo format_info = PixelService::GetPixelFormatInfo(render_instance()->params().format());
 
   // Set up OIIO::ImageSpec for compressing cached images on disk
-  OIIO::ImageSpec spec(render_instance()->width(), render_instance()->height(), kRGBAChannels, format_info.oiio_desc);
+  OIIO::ImageSpec spec(render_instance()->params().width(), render_instance()->params().height(), kRGBAChannels, format_info.oiio_desc);
   spec.attribute("compression", "dwaa:200");
 
   while (!cancelled_) {
diff --git a/app/render/video/videorendererdownloadthread.h b/app/render/video/videorendererdownloadthread.h
index bc6f291c2..556d4d6be 100644
--- a/app/render/video/videorendererdownloadthread.h
+++ b/app/render/video/videorendererdownloadthread.h
@@ -8,11 +8,7 @@ class VideoRendererDownloadThread : public VideoRendererThreadBase
   Q_OBJECT
 public:
   VideoRendererDownloadThread(QOpenGLContext* share_ctx,
-                         const int& width,
-                         const int& height,
-                         const int &divider,
-                         const olive::PixelFormat& format,
-                         const olive::RenderMode& mode);
+                         const VideoRenderingParams &params);
 
   void Queue(RenderTexturePtr texture, const QString &fn, const QByteArray &hash);
 
diff --git a/app/render/video/videorendererprocessthread.cpp b/app/render/video/videorendererprocessthread.cpp
index 67f7f79d1..f28906cdc 100644
--- a/app/render/video/videorendererprocessthread.cpp
+++ b/app/render/video/videorendererprocessthread.cpp
@@ -24,12 +24,8 @@
 
 RendererProcessThread::RendererProcessThread(VideoRendererProcessor* parent,
                                              QOpenGLContext *share_ctx,
-                                             const int &width,
-                                             const int &height,
-                                             const int &divider,
-                                             const olive::PixelFormat &format,
-                                             const olive::RenderMode &mode) :
-  VideoRendererThreadBase(share_ctx, width, height, divider, format, mode),
+                                             const VideoRenderingParams &params) :
+  VideoRendererThreadBase(share_ctx, params),
   parent_(parent),
   cancelled_(false)
 {
@@ -109,7 +105,7 @@ void RendererProcessThread::ProcessLoop()
 
       // Check hash
       QCryptographicHash hasher(QCryptographicHash::Sha1);
-      node_to_process->Hash(&hasher, output_to_process, path_.time());
+      node_to_process->Hash(&hasher, output_to_process, path_.in());
       hash_ = hasher.result();
 
       has_hash = parent_->HasHash(hash_);
@@ -120,7 +116,7 @@ void RendererProcessThread::ProcessLoop()
 
       if ((can_cache = parent_->TryCache(hash_))) {
 
-        QList<NodeDependency> deps = node_to_process->RunDependencies(output_to_process, path_.time());
+        QList<NodeDependency> deps = node_to_process->RunDependencies(output_to_process, path_.in());
 
         // Ask for other threads to run these deps while we're here
         if (!deps.isEmpty()) {
@@ -130,7 +126,7 @@ void RendererProcessThread::ProcessLoop()
         }
 
         // Get the requested value
-        texture_ = output_to_process->get_value(path_.time(), path_.time()).value<RenderTexturePtr>();
+        texture_ = output_to_process->get_value(path_.in(), path_.in()).value<RenderTexturePtr>();
 
         render_instance()->context()->functions()->glFinish();
       }
@@ -146,10 +142,10 @@ void RendererProcessThread::ProcessLoop()
 
     if (can_cache) {
       // We cached this frame, signal that it will need to be downloaded to disk
-      emit CachedFrame(texture_, path_.time(), hash_);
+      emit CachedFrame(texture_, path_.in(), hash_);
     } else {
       // This hash already exists, no need to cache, just map it
-      emit FrameSkipped(path_.time(), hash_);
+      emit FrameSkipped(path_.in(), hash_);
     }
   }
 }
diff --git a/app/render/video/videorendererprocessthread.h b/app/render/video/videorendererprocessthread.h
index ef1ed9fc8..bf5b51275 100644
--- a/app/render/video/videorendererprocessthread.h
+++ b/app/render/video/videorendererprocessthread.h
@@ -31,10 +31,7 @@ class RendererProcessThread : public VideoRendererThreadBase
 public:
   RendererProcessThread(VideoRendererProcessor* parent,
                         QOpenGLContext* share_ctx,
-                        const int& width,
-                        const int& height, const int &divider,
-                        const olive::PixelFormat& format,
-                        const olive::RenderMode& mode);
+                        const VideoRenderingParams &params);
 
   bool Queue(const NodeDependency &dep, bool wait, bool sibling);
 
diff --git a/app/render/video/videorendererthreadbase.cpp b/app/render/video/videorendererthreadbase.cpp
index 6c53c11c7..602d7a229 100644
--- a/app/render/video/videorendererthreadbase.cpp
+++ b/app/render/video/videorendererthreadbase.cpp
@@ -22,9 +22,9 @@
 
 #include <QDebug>
 
-VideoRendererThreadBase::VideoRendererThreadBase(QOpenGLContext *share_ctx, const int &width, const int &height, const int &divider, const olive::PixelFormat &format, const olive::RenderMode &mode) :
+VideoRendererThreadBase::VideoRendererThreadBase(QOpenGLContext *share_ctx, const VideoRenderingParams &params) :
   share_ctx_(share_ctx),
-  render_instance_(width, height, divider, format, mode)
+  render_instance_(params)
 {
   connect(share_ctx_, SIGNAL(aboutToBeDestroyed()), this, SLOT(Cancel()));
 }
diff --git a/app/render/video/videorendererthreadbase.h b/app/render/video/videorendererthreadbase.h
index 879db21ce..592017d3d 100644
--- a/app/render/video/videorendererthreadbase.h
+++ b/app/render/video/videorendererthreadbase.h
@@ -33,12 +33,7 @@ class VideoRendererThreadBase : public QThread
 {
   Q_OBJECT
 public:
-  VideoRendererThreadBase(QOpenGLContext* share_ctx,
-                     const int& width,
-                     const int& height,
-                     const int& divider,
-                     const olive::PixelFormat& format,
-                     const olive::RenderMode& mode);
+  VideoRendererThreadBase(QOpenGLContext* share_ctx, const VideoRenderingParams& params);
 
   RenderInstance* render_instance();
 
diff --git a/app/render/videoparams.cpp b/app/render/videoparams.cpp
new file mode 100644
index 000000000..84210f6ed
--- /dev/null
+++ b/app/render/videoparams.cpp
@@ -0,0 +1,93 @@
+#include "videoparams.h"
+
+VideoParams::VideoParams() :
+  width_(0),
+  height_(0)
+{
+
+}
+
+VideoParams::VideoParams(const int &width, const int &height, const rational &time_base) :
+  width_(width),
+  height_(height),
+  time_base_(time_base)
+{
+}
+
+const int &VideoParams::width() const
+{
+  return width_;
+}
+
+const int &VideoParams::height() const
+{
+  return height_;
+}
+
+const rational &VideoParams::time_base() const
+{
+  return time_base_;
+}
+
+VideoRenderingParams::VideoRenderingParams() :
+  format_(olive::PIX_FMT_INVALID)
+{
+}
+
+VideoRenderingParams::VideoRenderingParams(const int &width, const int &height, const rational &time_base, const olive::PixelFormat &format, const olive::RenderMode& mode, const int &divider) :
+  VideoParams(width, height, time_base),
+  format_(format),
+  mode_(mode),
+  divider_(divider)
+{
+  calculate_effective_size();
+}
+
+VideoRenderingParams::VideoRenderingParams(const VideoParams &params, const olive::PixelFormat &format, const olive::RenderMode& mode, const int& divider) :
+  VideoParams(params),
+  format_(format),
+  mode_(mode),
+  divider_(divider)
+{
+  calculate_effective_size();
+}
+
+const int &VideoRenderingParams::divider() const
+{
+  return divider_;
+}
+
+const int& VideoRenderingParams::effective_width() const
+{
+  return effective_width_;
+}
+
+const int& VideoRenderingParams::effective_height() const
+{
+  return effective_height_;
+}
+
+const olive::PixelFormat &VideoRenderingParams::format() const
+{
+  return format_;
+}
+
+const olive::RenderMode &VideoRenderingParams::mode() const
+{
+  return mode_;
+}
+
+void VideoRenderingParams::calculate_effective_size()
+{
+  effective_width_ = width() / divider_;
+  effective_height_ = height() / divider_;
+}
+
+bool VideoRenderingParams::is_valid() const
+{
+  return (width() > 0
+          && height() > 0
+          && !time_base().isNull()
+          && format_ != olive::PIX_FMT_INVALID
+          && format_ != olive::PIX_FMT_COUNT);
+}
diff --git a/app/render/videoparams.h b/app/render/videoparams.h
new file mode 100644
index 000000000..f2ada83cf
--- /dev/null
+++ b/app/render/videoparams.h
@@ -0,0 +1,50 @@
+#ifndef VIDEOPARAMS_H
+#define VIDEOPARAMS_H
+
+#include "common/rational.h"
+#include "pixelformat.h"
+#include "rendermodes.h"
+
+class VideoParams
+{
+public:
+  VideoParams();
+  VideoParams(const int& width, const int& height, const rational& time_base);
+
+  const int& width() const;
+  const int& height() const;
+  const rational& time_base() const;
+
+private:
+  int width_;
+  int height_;
+  rational time_base_;
+
+};
+
+class VideoRenderingParams : public VideoParams {
+public:
+  VideoRenderingParams();
+  VideoRenderingParams(const int& width, const int& height, const rational& time_base, const olive::PixelFormat& format, const olive::RenderMode& mode, const int& divider = 1);
+  VideoRenderingParams(const VideoParams& params, const olive::PixelFormat& format, const olive::RenderMode& mode, const int& divider = 1);
+
+  const int& divider() const;
+  const int& effective_width() const;
+  const int& effective_height() const;
+
+  bool is_valid() const;
+  const olive::PixelFormat& format() const;
+  const olive::RenderMode& mode() const;
+
+private:
+  void calculate_effective_size();
+
+  olive::PixelFormat format_;
+  olive::RenderMode mode_;
+
+  int divider_;
+  int effective_width_;
+  int effective_height_;
+};
+
+#endif // VIDEOPARAMS_H
diff --git a/app/widget/viewer/viewer.cpp b/app/widget/viewer/viewer.cpp
index 7aa98d040..51faab723 100644
--- a/app/widget/viewer/viewer.cpp
+++ b/app/widget/viewer/viewer.cpp
@@ -97,8 +97,6 @@ void ViewerWidget::SetTimebase(const rational &r)
   controls_->SetTimebase(r);
 
   playback_timer_.setInterval(qFloor(r.toDouble()));
-
-  video_renderer_->SetTimebase(r);
 }
 
 const double &ViewerWidget::scale()
@@ -154,12 +152,12 @@ void ViewerWidget::ConnectViewerNode(ViewerOutput *node)
   UpdateTextureFromNode(GetTime());
 
   if (viewer_node_ != nullptr) {
-    SetTimebase(viewer_node_->Timebase());
+    SetTimebase(viewer_node_->video_params().time_base());
 
     connect(viewer_node_, SIGNAL(TimebaseChanged(const rational&)), this, SLOT(SetTimebase(const rational&)));
     connect(viewer_node_, SIGNAL(SizeChanged(int, int)), this, SLOT(SizeChangedSlot(int, int)));
 
-    SizeChangedSlot(viewer_node_->ViewerWidth(), viewer_node_->ViewerHeight());
+    SizeChangedSlot(viewer_node_->video_params().width(), viewer_node_->video_params().height());
   }
 
   video_renderer_->SetViewerNode(viewer_node_);
diff --git a/app/widget/viewer/viewer.h b/app/widget/viewer/viewer.h
index 378e58768..182fb7969 100644
--- a/app/widget/viewer/viewer.h
+++ b/app/widget/viewer/viewer.h
@@ -30,6 +30,7 @@
 
 #include "common/rational.h"
 #include "node/output/viewer/viewer.h"
+#include "render/audio/audiorenderer.h"
 #include "render/video/videorenderer.h"
 #include "viewerglwidget.h"
 #include "viewersizer.h"
@@ -112,6 +113,8 @@ private:
 
   VideoRendererProcessor* video_renderer_;
 
+  AudioRendererProcessor* audio_renderer_;
+
   ViewerSizer* sizer_;
 
   ViewerGLWidget* gl_widget_;