ast->codec->bit_rate = ast->codec->sample_rate * 8;
avpriv_set_pts_info(vst, 64, msecs_per_frame, 1000000);
+ vst->avg_frame_rate = av_inv_q(vst->time_base);
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_id = AV_CODEC_ID_MOTIONPIXELS;