encoder_sample.cpp

 while(av_read_frame(inputFormatContext, &avPacket) >= 0)
    {
        // Decode Video
        if( videoStreamIndex == avPacket.stream_index)
        {
            int result = decodeVideo(inputVideoDecoderContext, videoFrame, &videoFrameCount, avPacket);
            
            if(result > 0)
            {
                // retime our frame ?               
                if (videoFrame->pts != AV_NOPTS_VALUE)
                    videoFrame->pts =  av_rescale_q(avPacket.pts, outputVideoStream->codec->time_base, outputVideoStream->time_base);
                
                AVPacket encodedPacket;// (AVPacket*)malloc(sizeof(AVPacket));
                av_init_packet(&encodedPacket);
                encodedPacket.data = NULL;
                encodedPacket.size = 0;
                
                result = encodeVideo(outputVideoStream->codec, &encodedPacket, videoFrame);
                
                if(result > 0)
                {
                    int write_ret = av_interleaved_write_frame(outputFormatContext, &encodedPacket);
                    if (write_ret < 0)
                    {
                        fprintf(stderr, "Error writing frame\n");
                    }
                }
            }
        }
        // Decode Audio
        else if(audioStreamIndex == avPacket.stream_index)
        {
            decodeAudio(inputAudioDecoderContext, audioFrame, &audioFrameCount, avPacket);
        }
    }