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** text segments should be allowed to overlap in time | ** text segments should be allowed to overlap in time | ||
** it must be allowed to have time segments without text (discontinuous codec) | ** it must be allowed to have time segments without text (discontinuous codec) | ||
** there should be a way to specify adaptable layout of overlay text, in particular relative positioning | |||
* Audio tracks should: | * Audio tracks should: | ||
edits