Eyevinn / mp4ff / 32614234098

82%

master: 82%

Pull #561

github

feat(mp4): defragment hybrid files with a progressive part

A fragmented file may carry progressive samples in its moov sample
tables before the first fragment. These samples now come first in the
converted output with their chunk structure preserved, and the fragment
samples are appended to the same tracks. Per-track chunk order follows
the sample tables even when stco offsets are not monotone, and the
tracks' chunk runs are interleaved by their input file position.
Hostile sample tables are validated before any count-proportional
allocation, and the progressive payload counts toward the total
payload bound.

The progressive part takes part in overlap resolution like a fragment:
a later fragment that re-declares its decode times supersedes the
progressive samples under the same later-declarer-wins, sample-boundary,
and coverage rules, so no declared content is ever silently dropped. A
track with a progressive prefix starts at decode time zero and anchors
the empty-edit alignment of later-starting fragment-only tracks.

783 of 932 new or added lines in 2 files covered. (84.01%)

21610 of 26467 relevant lines covered (81.65%)

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