[BUG] changing colour space with VUI (wrong syntax passed to FFMPEG)

[Selur]

Looking at:
https://ffmpeg.org/ffmpeg-bitstream-filt...5fmetadata
They say to use:

ffmpeg -i INPUT -c copy -bsf:v prores_metadata=color_primaries=bt709:color_trc=bt709:colorspace=bt709 output.mov

Okay, the problem is: bt470bg is only allowed for the primes.

color_primaries

    Set the color primaries. Available values are:

    ‘auto’

        Keep the same color primaries property (default).
    ‘unknown’
    ‘bt709’
    ‘bt470bg’

        BT601 625
    ‘smpte170m’

        BT601 525
    ‘bt2020’
    ‘smpte431’

        DCI P3
    ‘smpte432’

        P3 D65

transfer_characteristics

    Set the color transfer. Available values are:

    ‘auto’

        Keep the same transfer characteristics property (default).
    ‘unknown’
    ‘bt709’

        BT 601, BT 709, BT 2020
    ‘smpte2084’

        SMPTE ST 2084
    ‘arib-std-b67’

        ARIB STD-B67

matrix_coefficients

    Set the matrix coefficient. Available values are:

    ‘auto’

        Keep the same colorspace property (default).
    ‘unknown’
    ‘bt709’
    ‘smpte170m’

        BT 601
    ‘bt2020nc’

=> I'll restrict Hybrid to the values listed in the FFmpeg documentation.

Thanks for the report.
Instead of:

Primes to bt470bg, Transfer to bt709 and Matrix to bt470bg.

use:
Primes to bt470bg, Transfer to bt709 and Matrix to smpte170m.

prores_metadata=color_primaries=bt470bg:color_trc=bt709:colorspace=smpte170m

works fine here.


Cu Selur