reimplemented export process

app/codec/encoder.cpp

@@ -232,7 +232,7 @@ void EncodingParams::Save(QXmlStreamWriter *writer) const
 Encoder* Encoder::CreateFromID(const QString &id, const EncodingParams& params)
 {
   Q_UNUSED(id)
-  
+
   return new FFmpegEncoder(params);
 }
 

app/codec/encoder.h

@@ -122,6 +122,11 @@ public:
 
   virtual void Close() = 0;
 
+  virtual PixelFormat::Format GetDesiredPixelFormat() const
+  {
+    return PixelFormat::PIX_FMT_INVALID;
+  }
+
 private:
   EncodingParams params_;
 

app/codec/ffmpeg/ffmpegencoder.h

@@ -47,6 +47,11 @@ public:
 
   virtual void Close() override;
 
+  virtual PixelFormat::Format GetDesiredPixelFormat() const override
+  {
+    return video_conversion_fmt_;
+  }
+
 private:
   /**
    * @brief Handle an error