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Re-map Video Transfer value 5 to 6 

This is seen in some manifests/services for whatever reason. I can't find documentation for this value anywhere. It seems unused in official specifications as of right now. However, it seems in some services/places it is unofficially used as a PAL-version of BT-601 transfer, which makes sense.

Devine's code (and other services) wouldn't care about the difference here so currently it is just implemented as a remap from 5 to 6. In the future it may be changed and actually defined as two seperate BT_601 Transfer enum entries.
This commit is contained in:
rlaphoenix 2024-01-08 23:56:45 +00:00
parent d690ca4d13
commit 2291f90f64
1 changed files with 6 additions and 0 deletions
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6
devine/core/tracks/video.py
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@ -117,6 +117,12 @@ class Video(Track):
YCbCr_BT_2020_and_2100 = 9 # YCbCr BT.2100 shares the same CP
ICtCp_BT_2100 = 14
if transfer == 5:
# While not part of any standard, it is typically used as a PAL variant of Transfer.BT_601=6.
# i.e. where Transfer 6 would be for BT.601-NTSC and Transfer 5 would be for BT.601-PAL.
# The codebase is currently agnostic to either, so a manual conversion to 6 is done.
transfer = 6
primaries = Primaries(primaries)
transfer = Transfer(transfer)
matrix = Matrix(matrix)