+
+ AVFormatContext* _format_context = nullptr;
+ std::vector<AVCodecContext*> _codec_context;
+
+ /** AVFrame used for decoding video */
+ AVFrame* _video_frame = nullptr;
+ /** Index of video stream within AVFormatContext */
+ boost::optional<int> _video_stream;
+
+ AVFrame* audio_frame (std::shared_ptr<const FFmpegAudioStream> stream);