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| author | Vishwanath Dixit <vdixit@akamai.com> | 2018-05-07 15:27:51 +0530 |
|---|---|---|
| committer | Karthick Jeyapal <kjeyapal@akamai.com> | 2018-05-29 09:32:11 +0530 |
| commit | 5717cd80dcb825efcbcb0b936a02b755cd2d5f62 (patch) | |
| tree | 8efefe30947bf1a94e6857daf7aef02f01aea019 /doc/muxers.texi | |
| parent | f09635f2a2e653ab5f790b1e9d7a15794745ca30 (diff) | |
| download | ffmpeg-5717cd80dcb825efcbcb0b936a02b755cd2d5f62.tar.gz | |
avformat/movenc: creating producer reference time (PRFT) box
The producer reference time box supplies relative wall-clock times
at which movie fragments, or files containing movie fragments
(such as segments) were produced.
The box is mainly useful in live streaming use cases. A media player
can parse the box and utilize the time fields to measure and improve
the latency during real time playout.
Diffstat (limited to 'doc/muxers.texi')
| -rw-r--r-- | doc/muxers.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/muxers.texi b/doc/muxers.texi index 80c65420ba..33f1f7bbaf 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -1344,6 +1344,16 @@ be negative. This enables the initial sample to have DTS/CTS of zero, and reduces the need for edit lists for some cases such as video tracks with B-frames. Additionally, eases conformance with the DASH-IF interoperability guidelines. +@item -write_prft +Write producer time reference box (PRFT) with a specified time source for the +NTP field in the PRFT box. Set value as @samp{wallclock} to specify timesource +as wallclock time and @samp{pts} to specify timesource as input packets' PTS +values. + +Setting value to @samp{pts} is applicable only for a live encoding use case, +where PTS values are set as as wallclock time at the source. For example, an +encoding use case with decklink capture source where @option{video_pts} and +@option{audio_pts} are set to @samp{abs_wallclock}. @end table @subsection Example |