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  1. I'm trying to convert the video to mp4, but it seems that ffmpeg is not able to infer colorspace value (could be something else too), which seems to be "unknown". I've attached the file containing frame details. I'm not an expert, but I've tried explicitly setting the color values (color_space, color_primaries, color_transfer), but still faced the same issue. Faced similar issue with some other videos too. I'll be grateful if someone can help me with this

    ffmpeg -y -i -crf 23  -vcodec h264 -acodec aac -ar 44100 -b:a 192k -pix_fmt yuv420p -strict -2  -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2:color=white@0.0" -movflags +faststart output.mp4
    ffmpeg version 7.0.1


    ffmpeg version 7.0.1 Copyright (c) 2000-2024 the FFmpeg developers
      built with Apple clang version 15.0.0 (clang-1500.3.9.4)
      configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/7.0.1 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
      libavutil      59.  8.100 / 59.  8.100
      libavcodec     61.  3.100 / 61.  3.100
      libavformat    61.  1.100 / 61.  1.100
      libavdevice    61.  1.100 / 61.  1.100
      libavfilter    10.  1.100 / 10.  1.100
      libswscale      8.  1.100 /  8.  1.100
      libswresample   5.  1.100 /  5.  1.100
      libpostproc    58.  1.100 / 58.  1.100
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '':
        major_brand     : qt  
        minor_version   : 0
        compatible_brands: qt  
        creation_time   : 2024-06-08T05:18:31.000000Z
        encoder         : Lavf61.1.100
      Duration: 00:00:01.01, start: 0.000000, bitrate: 950910 kb/s
      Stream #0:0[0x1](und): Video: prores (HQ) (apch / 0x68637061), yuv422p10le(progressive), 3840x2160, 926658 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn (default)
            creation_time   : 2024-06-08T05:18:31.000000Z
            handler_name    : Core Media Video
            vendor_id       : FFMP
            timecode        : 00:00:00:00
      Stream #0:1[0x2](eng): Data: none (tmcd / 0x64636D74), 0 kb/s
            creation_time   : 2024-06-08T05:18:31.000000Z
            handler_name    : Core Media Time Code
            timecode        : 00:00:00:00
    [out#0/mp4 @ 0x600001e58180] Codec AVOption b (set bitrate (in bits/s)) 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 (libx264))
    Press [q] to stop, [?] for help
    [graph 0 input from stream 0:0 @ 0x600001c40000] Value 234.000000 for parameter 'colorspace' out of range [0 - 14]
    [graph 0 input from stream 0:0 @ 0x600001c40000] Error setting option colorspace to value 234.
    [graph 0 input from stream 0:0 @ 0x600001c40000] Error applying generic filter options.
    [vf#0:0 @ 0x60000195c000] Error reinitializing filters!
    [vf#0:0 @ 0x60000195c000] Task finished with error code: -34 (Result too large)
    [vf#0:0 @ 0x60000195c000] Terminating thread with return code -34 (Result too large)
    [vost#0:0/libx264 @ 0x123e065a0] Could not open encoder before EOF
    [vost#0:0/libx264 @ 0x123e065a0] Task finished with error code: -22 (Invalid argument)
    [vost#0:0/libx264 @ 0x123e065a0] Terminating thread with return code -22 (Invalid argument)
    [out#0/mp4 @ 0x600001e58180] Nothing was written into output file, because at least one of its streams received no packets.
    frame=    0 fps=0.0 q=0.0 Lsize=       0KiB time=N/A bitrate=N/A speed=N/A    
    Conversion failed!
    Image Attached Files
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  2. Some changes in ffmpeg recently broke a bunch of things . Non standard colorimetery flags (or absence of) cause massive problems currently

    A workaround is to use a prores bitstream filter , or older ffmpeg version until it gets fixed. Developers are aware, several related bug reports have been filed

    ffmpeg -bsf:v  prores_metadata=color_primaries=bt709:color_trc=bt709:colorspace=bt709 -i ...
    Note that the documentation is wrong; the switches are color_primaries, color_trc, colorspace ; not transfer_characteristics, matrix_coefficients
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