According to the white paper, ProRes files can contain 12-bit RGB video with an optional 16-bit alpha channel. Is there some way to tell whether this alpha channel exists? I believe this video clip is 12-bit RGB with a 16-bit alpha channel, but I am trying to verify that. Ffprobe calls it yuv444p10le. DaVinci Resolve identifies it as 16-bit, probably because it sees the alpha channel and only reports the highest bit depth of any channel.
Also — does ffmpeg support 12-bit RGB? I do not see it listed in “ffmpeg -pix_fmts”. ffprobe -show_streams B002_C037_06288E_prores444XQ_full12.mov ffprobe version N-90742-g0b3c1854cb Copyright (c) 2007-2018 the FFmpeg developers built with gcc 7.3.0 (GCC) configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth libavutil 56. 15.100 / 56. 15.100 libavcodec 58. 19.100 / 58. 19.100 libavformat 58. 13.100 / 58. 13.100 libavdevice 58. 4.100 / 58. 4.100 libavfilter 7. 17.100 / 7. 17.100 libswscale 5. 2.100 / 5. 2.100 libswresample 3. 2.100 / 3. 2.100 libpostproc 55. 2.100 / 55. 2.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'B002_C037_06288E_prores444XQ_full12.mov': Metadata: major_brand : qt minor_version : 537199360 compatible_brands: qt creation_time : 2018-04-17T19:58:27.000000Z Duration: 00:00:01.33, start: 0.000000, bitrate: 1551673 kb/s Stream #0:0(eng): Video: prores (ap4x / 0x78347061), yuv444p10le(bt709, progressive), 3840x2160, 1551663 kb/s, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 24 tbn, 24 tbc (default) Metadata: creation_time : 2018-04-17T19:58:27.000000Z handler_name : Apple Alias Data Handler encoder : Apple ProRes 4444 XQ timecode : 00:00:00:00 Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default) Metadata: creation_time : 2018-04-17T19:58:28.000000Z handler_name : Apple Alias Data Handler reel_name : B002_C037_06288E timecode : 00:00:00:00 Unsupported codec with id 0 for input stream 1 [STREAM] index=0 codec_name=prores codec_long_name=Apple ProRes (iCodec Pro) profile=unknown codec_type=video codec_time_base=1/24 codec_tag_string=ap4x codec_tag=0x78347061 width=3840 height=2160 coded_width=3840 coded_height=2160 has_b_frames=0 sample_aspect_ratio=1:1 display_aspect_ratio=16:9 pix_fmt=yuv444p10le level=-99 color_range=unknown color_space=bt709 color_transfer=bt709 color_primaries=bt709 chroma_location=unspecified field_order=progressive timecode=N/A refs=1 id=N/A r_frame_rate=24/1 avg_frame_rate=24/1 time_base=1/24 start_pts=0 start_time=0.000000 duration_ts=32 duration=1.333333 bit_rate=1551663072 max_bit_rate=N/A bits_per_raw_sample=10 nb_frames=32 nb_read_frames=N/A nb_read_packets=N/A DISPOSITION:default=1 DISPOSITION:dub=0 DISPOSITION:original=0 DISPOSITION:comment=0 DISPOSITION:lyrics=0 DISPOSITION:karaoke=0 DISPOSITION:forced=0 DISPOSITION:hearing_impaired=0 DISPOSITION:visual_impaired=0 DISPOSITION:clean_effects=0 DISPOSITION:attached_pic=0 DISPOSITION:timed_thumbnails=0 TAG:creation_time=2018-04-17T19:58:27.000000Z TAG:language=eng TAG:handler_name=Apple Alias Data Handler TAG:encoder=Apple ProRes 4444 XQ TAG:timecode=00:00:00:00 [/STREAM] [STREAM] index=1 codec_name=unknown codec_long_name=unknown profile=unknown codec_type=data codec_tag_string=tmcd codec_tag=0x64636d74 id=N/A r_frame_rate=0/0 avg_frame_rate=24/1 time_base=1/24 start_pts=0 start_time=0.000000 duration_ts=32 duration=1.333333 bit_rate=24 max_bit_rate=N/A bits_per_raw_sample=N/A nb_frames=1 nb_read_frames=N/A nb_read_packets=N/A DISPOSITION:default=1 DISPOSITION:dub=0 DISPOSITION:original=0 DISPOSITION:comment=0 DISPOSITION:lyrics=0 DISPOSITION:karaoke=0 DISPOSITION:forced=0 DISPOSITION:hearing_impaired=0 DISPOSITION:visual_impaired=0 DISPOSITION:clean_effects=0 DISPOSITION:attached_pic=0 DISPOSITION:timed_thumbnails=0 TAG:creation_time=2018-04-17T19:58:28.000000Z TAG:language=eng TAG:handler_name=Apple Alias Data Handler TAG:reel_name=B002_C037_06288E TAG:timecode=00:00:00:00 [/STREAM] _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".