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Used by some proprietary software for their fragmented files. Adds some support for multi-stream fragmented files Flow is as follows. 1. The first 'fragment' is written as a self-contained fragmented mdat+moov complete with an edit list and durations, tags, etc. 2. Subsequent fragments are written with a mdat+moof and each stream is interleaved as data arrives (currently ignoring the interleave-* properties). data-offsets in both the traf and the trun ensure data is read from the correct place on demuxing. Data/chunk offsets are also kept for writing out the final moov. 3. On finalisation, the initial moov is invalidated to a hoov and the size of the first mdat is extended to cover the entire file contents. Then a moov is written as regularly would in moov-at-end mode (the default). This results in a file that is playable throughout while leaving a finalised file on completion for players that do not understand fragmented mp4. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/643> |
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