[Matroska-devel] Fwd: [Cellar] Depth offsets for subtitles in case of 3D MVC tracks in MKV files

Moritz Bunkus via Matroska-devel matroska-devel at lists.matroska.org
Mon Feb 29 10:04:25 CET 2016


> CodecState is per Cluster, though, not per Track,

This is wrong. CodecState is a child element of BlockGroup. It's effect
as it's been meant to be understood so far is to replace CodecPrivate
for that track from that BlockGroup onwards (until another BlockGroup
with CodecState comes along). So it _could_ be used for changing Z-depth
values for individual subtitle frames. However, as it's supposed to
replace CodecPrivate I don't think it would be a good fit for Z-depth
data as Z-depth data is additional data that changes on a frame-by-frame
basis; it doesn't invalidate the existing CodecPrivate data.

CodecState was meant for situations in which e.g. a whole new set of
SEIs/PPSs come along.

I'd prefer new elements, or maybe BlockAddition.

Kind regards,
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