[BUG] MKV Advanced Video Signaling Options Have No Effect

[potejan]

This is strange... I can confirm that ULYO and "advanced signaling" matrix+primaries+transfer bt.709 works fine.

MediaInfo:
Color primaries                          : BT.709
Transfer characteristics                : BT.709
Matrix coefficients                      : BT.709
ffprobe:
yuv420p(tv, bt470bg/bt709/bt709)

However, ULYO and "advanced signaling" matrix+primaries SMPTE 170M and transfer bt.709 does not work:

MediaInfo:
Color primaries                          : BT.601 NTSC
Transfer characteristics                : BT.709
Matrix coefficients                      : BT.601                   // <-- this should be "NTSC", otherwise it is BT.470BG
ffprobe:
yuv420p(tv, bt470bg/smpte170m/bt709)                 // <-- as noted above, matrix becomes PAL, but we want it to be NTSC like the primaries

Please try this scenario and let me know if you can repro. If not, I promise I will send debug logs immediately.

Thanks!