[FFmpeg-user] Position of Images and Audio in a Video File

[Stefan de Konink]

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