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doc/muxers: document mov faststart option.

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Clément Bœsch 2012-10-21 15:21:21 +02:00
parent c0d56bf8a4
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1 changed files with 6 additions and 1 deletions
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doc/muxers.texi
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@ -252,7 +252,8 @@ See also the @ref{framemd5} muxer.
The mov/mp4/ismv muxer supports fragmentation. Normally, a MOV/MP4 The mov/mp4/ismv muxer supports fragmentation. Normally, a MOV/MP4
file has all the metadata about all packets stored in one location file has all the metadata about all packets stored in one location
(written at the end of the file, it can be moved to the start for (written at the end of the file, it can be moved to the start for
better playback using the @command{qt-faststart} tool). A fragmented better playback by adding @var{faststart} to the @var{movflags}, or
using the @command{qt-faststart} tool). A fragmented
file consists of a number of fragments, where packets and metadata file consists of a number of fragments, where packets and metadata
about these packets are stored together. Writing a fragmented about these packets are stored together. Writing a fragmented
file has the advantage that the file is decodable even if the file has the advantage that the file is decodable even if the
@ -310,6 +311,10 @@ more efficient), but with this option set, the muxer writes one moof/mdat
pair for each track, making it easier to separate tracks. pair for each track, making it easier to separate tracks.
This option is implicitly set when writing ismv (Smooth Streaming) files. This option is implicitly set when writing ismv (Smooth Streaming) files.
@item -movflags faststart
Run a second pass moving the moov atom on top of the file. This
operation can take a while, and will not work in various situations such
as fragmented output, thus it is not enabled by default.
@end table @end table
Smooth Streaming content can be pushed in real time to a publishing Smooth Streaming content can be pushed in real time to a publishing