Method write_frame

src/FFmpegWriter.cpp:690–729

Write all frames in the queue to the video file.

// Write all frames in the queue to the video file.
void FFmpegWriter::write_frame(std::shared_ptr<Frame> frame) {
	// Flip writing flag
	is_writing = true;

	// Create blank exception
	bool has_error_encoding_video = false;

	// Process audio frame
	if (info.has_audio && audio_st)
		write_audio_packets(false, frame);

	// Process video frame
	if (info.has_video && video_st)
		process_video_packet(frame);

	if (info.has_video && video_st) {
		// Does this frame's AVFrame still exist
		if (av_frames.count(frame)) {
			// Get AVFrame
			AVFrame *frame_final = av_frames[frame];

			// Write frame to video file
			if (!write_video_packet(frame, frame_final)) {
				has_error_encoding_video = true;
			}

			// Deallocate buffer and AVFrame
			av_freep(&(frame_final->data[0]));
			AV_FREE_FRAME(&frame_final);
			av_frames.erase(frame);
		}
	}

	// Done writing
	is_writing = false;

	// Raise exception from main thread
	if (has_error_encoding_video)
		throw ErrorEncodingVideo("Error while writing raw video frame", -1);
}

// Write a block of frames from a reader
void FFmpegWriter::WriteFrame(ReaderBase *reader, int64_t start, int64_t length) {