[HELP] Unwanted change of contrast

[Selur]

By default Hybrid passes through the luma range (tv/pc) from the source if the luma range of the source is wrongly flagged or detected this problem occurs. (It also can happen if the player used simply ignores the flag.)

Looking at the info of the source sample you shared with me:

colour_description_present : Yes colour_description_present_Source : Container / Stream Color range : Limited colour_range_Source : Container colour_range_Original : Full colour_range_Original_Source : Stream Color primaries : BT.709 colour_primaries_Source : Container / Stream Transfer characteristics : BT.709 transfer_characteristics_Source : Container / Stream Matrix coefficients : BT.709 matrix_coefficients_Source : Container / Stream Codec configuration box : avcC

One can see that the stream is flagged 'PC/Full'-scale, but the container is flagged 'TV/Limited' luma scale.
This is problematic, since this will cause problems with various players, since some will use the stream flag and others will use the container flag.
Atm. Hybrid takes the flag of the container, since this is the flag that should have been set last.
-> I'll add an option to the next release to select whether the stream (Original) scale should be preferred during the analysis.

Atm. when doing no filtering, your problem should be fixed if you simply disable the 'Adjust->Color->Range' and
then set the 'Luma range' to pc range.

Disabling the 'Luma range' filtering is a bad idea, since it gives even more uncertainty to what will happen on playback.

Cu Selur