Colors Information missing on a video

[salvo00786]

Hi... I am trying the new Topaz Video AI and on some files I have this problem:

no ICC profile found, will write nclx/nclc colour info instead.

I have found the problem:

All the files that don't have these information written on the files have this problem:

Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

How can I write these information on a MP4 / MKV file?

[ProWo]

Try this

ffmpeg -i input.mp4 -c copy -color_primaries bt709 -color_trc bt709 -colorspace bt709 -color_range tv output.mp4

[salvo00786]

Thanks, I tried, but the only information added to the output are these:

FromStats_BitRate : 83057384
FromStats_Duration : 01:51:19.005000000
FromStats_FrameCount : 400340
FromStats_StreamSize : 69342595879

[jagabo]

Don't those stats have to be added at the bitstream filter level when remuxing?

https://ffmpeg.org/ffmpeg-bitstream-filters.html#h264_005fmetadata

something like:

ffmpeg -i input.mp4 -c copy -bsf:v h264_metadata=colour_primaries=1:transfer_characteristics=1:matrix_coefficients=1:video_full_range_flag=0 output.mp4

I don't know what values are correct. You'll have to look them up (or just experiment). And if it's not h.264 you'll have to specify the correct bitstream filter (hevc_metadata, prores-metadata, etc.).

<edit>
After a little experimentation: 1 is BT.709 for color_primaries, transfer_characteristics, and matrix_coefficients. 0 is limited range for video_full_range_flag. Values may be different for different bsf's. Above command line modified to reflect this.

MediaInfo report from an unflagged h.264 video remuxed with the above command line:

Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

</edit>

[ProWo]

You're right, jagabo (as you usually are)
Your command line should work for avc.

[salvo00786]

Yes, thank you, your command line worked.