On Fri, Feb 21, 2020, at 10:57 AM, MediaMouth wrote: > > The stdout seems to suggest the issue is -crf vs a constant bitrate.. > Codec AVOption crf (Select the quality for constant quality mode) > specified for output file #0 ([DestPath]) has not been used for any > stream. The most likely reason is either wrong type (e.g. a video > option with no video streams) or that it is a private option of some > encoder which was not actually used for any stream. > but I've definitely used -crf in the past with h264_videotoolbox > without an issue.
-crf is not a generic option. It is a "private" option that is only supported by certain encoders including libx264, libx265, libaom-av1, libvpx, and libxavs. I see no mention of this option in libavcodec/videotoolboxenc.c. Generic vs private option description: https://ffmpeg.org/ffmpeg.html#AVOptions You can see the private options offered by h264_videotoolbox with: ffmpeg -h encoder=h264_videotoolbox I have no experience with videotoolbox, and I don't have the necessary hardware to try it, so I can't provide any suggestions other than to investigate the available private options and perhaps try manually providing an appropriate bitrate, such as -b:v 2000k. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
