[cyberbeing]

Originally Posted by sneaker_ger

What does this entail?

I remember the discussion on the libass tracker and it seemed like devs were at a loss on how to handle the issue of HDR.

To be safe, I'd recommend thinking of the current support as BT.2020 SDR only. This release basically only adds support for the 'TV.2020' & 'PC.2020' 'YCbCr Matrix' tags. This was just something which was long overdue to be added to XySubFilter. Originally it was defined in v1.0.5 of SubRenderIntf.h released back in 2013(!), but nobody ever got around to adding support to XySubFilter. With this release, BT.601, BT.709, and BT.2020 are now supported.

Similar to the situation back when BT.709 support was added to xy-VSFilter, if you're authoring an ass script using the BT.2020 matrix, please tag 'YCbCr Matrix' of 'TV.2020' or 'PC.2020' appropriately so it will be handled correctly in the future. If you notice any bugs with BT.2020 authored scripts, please report them.