diff options
| author | Luca Barbato <lu_zero@gentoo.org> | 2014-03-06 17:58:34 +0100 |
|---|---|---|
| committer | Luca Barbato <lu_zero@gentoo.org> | 2014-05-28 22:04:56 +0200 |
| commit | c94e2e85cb6af8a570d8542a830556243bd32873 (patch) | |
| tree | 7f8e6f1ced811150a864bdcfe718705f45469ae5 /doc | |
| parent | 6d212599aa684f30511fb08ca30fe2378405304e (diff) | |
| download | ffmpeg-c94e2e85cb6af8a570d8542a830556243bd32873.tar.gz | |
nut: Support experimental NUT 4 features
Add the low overhead pipe mode and the extended broadcast mode.
Export the options as 'syncponts' since it impacts only that.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/muxers.texi | 17 | ||||
| -rw-r--r-- | doc/nut.texi | 21 |
2 files changed, 38 insertions, 0 deletions
diff --git a/doc/muxers.texi b/doc/muxers.texi index e1c0383eac..2d1f53ccde 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -444,6 +444,23 @@ Alternatively you can write the command as: avconv -benchmark -i INPUT -f null - @end example +@section nut + +@table @option +@item -syncpoints @var{flags} +Change the syncpoint usage in nut: +@table @option +@item @var{default} use the normal low-overhead seeking aids. +@item @var{none} do not use the syncpoints at all, reducing the overhead but making the stream non-seekable; +@item @var{timestamped} extend the syncpoint with a wallclock field. +@end table +The @var{none} and @var{timestamped} flags are experimental. +@end table + +@example +avconv -i INPUT -f_strict experimental -syncpoints none - | processor +@end example + @section ogg Ogg container muxer. diff --git a/doc/nut.texi b/doc/nut.texi index 39a22ff3ea..042c88a3ab 100644 --- a/doc/nut.texi +++ b/doc/nut.texi @@ -17,6 +17,27 @@ subtitle and user-defined streams in a simple, yet efficient, way. It was created by a group of FFmpeg and MPlayer developers in 2003 and was finalized in 2008. +@chapter Modes +NUT has some variants signaled by using the flags field in its main header. + +@multitable @columnfractions .4 .4 +@item BROADCAST @tab Extend the syncpoint to report the sender wallclock +@item PIPE @tab Omit completely the syncpoint +@end multitable + +@section BROADCAST + +The BROADCAST variant provides a secondary time reference to facilitate +detecting endpoint latency and network delays. +It assumes all the endpoint clocks are syncronized. +To be used in real-time scenarios. + +@section PIPE + +The PIPE variant assumes NUT is used as non-seekable intermediate container, +by not using syncpoint removes unneeded overhead and reduces the overall +memory usage. + @chapter Container-specific codec tags @section Generic raw YUVA formats |