#10623: Metadata is written at the end of the process, making piped output miss
metadata
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Reporter: vortex | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: ffmpeg
Version: git-master | Resolution:
Keywords: pipe | Blocked By:
matroska -map |
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by mkver):
The Matroska muxer writes updated metadata (namely proper durations which
is probably the missing metadata you mention) as well as the index ("Cues"
in Matroska-speak) at the end if the output is seekable. The reason for
this restriction is that in order for the metadata to be updated as well
as in order for Cues to be usable, one needs to be able to overwrite some
bytes at the beginning of the file. So I don't really see what could be
done better here.
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Ticket URL: <https://trac.ffmpeg.org/ticket/10623#comment:1>
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