[bug] colorspace bt709 error for ycgco

[von]

ffmpeg 7.1.1

command:

./ffmpeg7  -y -i de.mp4 -colorspace bt709 -an -f mp4 de-264.mp4

de.mp4:

color_range=tv
color_space=ycgco
color_primaries=bt709
color_transfer=bt709

get error:

Impossible to convert between the formats supported by the filter 'Parsed_null_0' and the filter 'auto_scale_0'
[vf#0:0 @ 0x558741629500] Error reinitializing filters!
[vf#0:0 @ 0x558741629500] Task finished with error code: -38 (Function not implemented)
[vf#0:0 @ 0x558741629500] Terminating thread with return code -38 (Function not implemented)
[vost#0:0/libx264 @ 0x55874165c440] Could not open encoder before EOF
[vost#0:0/libx264 @ 0x55874165c440] Task finished with error code: -22 (Invalid argument)
[vost#0:0/libx264 @ 0x55874165c440] Terminating thread with return code -22 (Invalid argument)
[out#0/mp4 @ 0x55874161db40] 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!

If I remove -colorspace bt709, this works fine.
Please someone help me.

[Balling]

YCgCo is not supported by our code. ​https://trac.ffmpeg.org/ticket/10839#comment:19

[von]

Replying to Balling:

YCgCo is not supported by our code. ​https://trac.ffmpeg.org/ticket/10839#comment:19

How do I use vf_scale in this case? Is there any best practice? I didn't need to consider this issue in previous versions. I just want to upgrade to the latest ffmpeg and change as few parameters as possible.

For other color spaces, it is normal to use the old version of ffmpeg. How can the new version be compatible? For example, in this case:

color_range=pc
color_space=reserved
color_primaries=reserved
color_transfer=smpte170m

I want to know if the error "Impossible to convert between the formats supported by the filter 'ffplay_buffer' and the filter 'auto_scale_0'" when playing YCgCo video is expected?