For some reason ffmpeg code I've been using successfully seems to no longer
work (or I somehow I accidentally changed something and didn't realize it)
The results of using the command below produces very low quality results. The
same command run w/o h264_videotoolbox works fine, albeit considerably slower.
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.
Thanks in advance.
Command:
ffmpeg -i [SrcPath] -vcodec h264_videotoolbox -crf 18 -vf format=yuv420p
[DestPath]
Output:
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.17)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared
--enable-pthreads --enable-version3 --enable-avresample --cc=clang
--host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl
--enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus
--enable-librubberband --enable-libsnappy --enable-libtesseract
--enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid
--enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r
--enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr
--enable-videotoolbox --disable-libjack --disable-indev=jack
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '[SrcPath]':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf58.29.100
Duration: 00:05:38.64, start: 0.000000, bitrate: 66306 kb/s
Stream #0:0(eng): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv,
bt470bg/unknown/unknown, progressive), 720x486, 64765 kb/s, 29.97 fps, 29.97
tbr, 11988 tbn, 11988 tbc (default)
Metadata:
handler_name : Apple Video Media Handler
encoder : Lavc58.54.100 prores_ks
Stream #0:1(eng): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, stereo,
s16, 1536 kb/s (default)
Metadata:
handler_name : Apple Sound Media Handler
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.
Stream mapping:
Stream #0:0 -> #0:0 (prores (native) -> h264 (h264_videotoolbox))
Stream #0:1 -> #0:1 (pcm_s16be (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, mp4, to '[DestPath]':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf58.29.100
Stream #0:0(eng): Video: h264 (h264_videotoolbox) (avc1 / 0x31637661),
yuv420p, 720x486, q=2-31, 200 kb/s, 29.97 fps, 11988 tbn, 29.97 tbc (default)
Metadata:
handler_name : Apple Video Media Handler
encoder : Lavc58.54.100 h264_videotoolbox
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 128 kb/s (default)
Metadata:
handler_name : Apple Sound Media Handler
encoder : Lavc58.54.100 aac
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