Hi,
Due to playout requirements (sequential access) it is typically made
available as interleaved blocks. But it can also be completely independent
tracks, and synchronised by the meta description for example with SMIL.
You might want to review a well documented container format such as
Matroska https://matroska.org/index.html or OGG
https://xiph.org/ogg/doc/oggstream.html
--
Stefan
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