diff options
| author | Oneric <oneric@oneric.stub> | 2024-04-03 18:24:48 +0200 |
|---|---|---|
| committer | Oneric <oneric@oneric.stub> | 2024-04-03 18:24:49 +0200 |
| commit | db4b720172a426aef183c6912e5847d60250b947 (patch) | |
| tree | c9b6b85e1a58d41b650f71c88dc33762a161669f | |
| parent | e51781341493e0312f0c7fee66372f0365f7b962 (diff) | |
| download | libass-db4b720172a426aef183c6912e5847d60250b947.tar.bz2 libass-db4b720172a426aef183c6912e5847d60250b947.tar.xz | |
Update documentation re subs on HDR
mpv (temporarily) enabling colourspace-matching for HDR videos,
showed by now a noteable amount of subs exist expecting to
remain SDR when placed on HDR video.
After further discussion in #297 we thus decided to revise
the default for subs on HDR to forego exact colour-matches, see:
https://github.com/libass/libass/issues/297#issuecomment-1991497184
| -rw-r--r-- | libass/ass_types.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/libass/ass_types.h b/libass/ass_types.h index 48ee09e..f14a5ff 100644 --- a/libass/ass_types.h +++ b/libass/ass_types.h @@ -232,9 +232,14 @@ typedef struct ass_event { * * Further note all of the above only concerns the RGB values. * Color primaries and transfer charateristics of ASS subtitles - * must always match their associated video. - * (This indeed has some undesirable effects on HDR videos, - * but no mechanism avoiding this is yet standardized.) + * must always match their associated video when placed on top of SDR video. + * + * Subs on HDR video need additional consideration to yield satisfactory results, + * but unfortunately no mechanisms for this are standardized yet. + * Until such mechanisms are introduced and sub files start to enable them, + * all subtitles are to be considered SDR. When placed on top of HDR video + * exact color matching is not relevant and the choice of SDR colorspace + * to render subs in is left to the presenter. */ typedef enum ASS_YCbCrMatrix { YCBCR_DEFAULT = 0, // Header missing |