viewer: allow switching open sequences

app/codec/ffmpeg/ffmpegencoder.cpp

@@ -75,7 +75,6 @@ void FFmpegEncoder::WriteAudio(const AudioRenderingParams &pcm_info, const QStri
                                   reinterpret_cast<const uint8_t**>(&input_data_array),
                                   samples_needed);
 
-      //qDebug() << "swr_convert returned" << converted << "samples";
       frame->pts = sample_counter;
 
       sample_counter += converted;

app/codec/ffmpeg/ffmpegframecache.cpp

@@ -65,14 +65,9 @@ void FFmpegFrameCache::Client::accessed(int i)
 
 void FFmpegFrameCache::Client::remove_old_frames(qint64 older_than)
 {
-  //int counter = 0;
-
   while (!frames_.isEmpty() && frames_.first().accessed < older_than) {
     FFmpegFrameCache::Release(frames_.takeFirst().frame);
-    //counter++;
   }
-
-  //qDebug() << "  * Removed" << counter << "frames";
 }
 
 Frame* FFmpegFrameCache::Get(const VideoRenderingParams &params)