AW: AW: 1000 hours offset in timestamp of h264 stream

[Nicolas Dufresne]

Le lundi 31 mai 2021 à 11:16 +0000, Winand Appelhoff via gstreamer-devel a
écrit :
> mpegtsmux interprets the first incoming timestamp as 0 ( the start-time-
> selection property defaults to zero)
> same goes for flvmux
> so basically both muxer offset the timestamps by default

Not entirely accurate, the muxers uses stream-time, which is a time scale
converted using the Segment. See gst_segment* APIs.

> 
> Von: gstreamer-devel <gstreamer-devel-bounces at lists.freedesktop.org> im
> Auftrag von Marianna S. Buschle via gstreamer-devel <
> gstreamer-devel at lists.freedesktop.org>
> Gesendet: Montag, 31. Mai 2021 12:49
> An: gstreamer-devel at lists.freedesktop.org <
> gstreamer-devel at lists.freedesktop.org>
> Cc: Marianna S. Buschle <msb at qtec.com>
> Betreff: Re: AW: 1000 hours offset in timestamp of h264 stream 
> After a lot of digging I have managed to find the bug related to this 1000
> hours offset:
> https://github.com/GStreamer/gst-plugins-ugly/blob/master/ext/x264/gstx264enc.c#L1383
> 
> So I can see how x264 is adding the offset and why.
> 
> But so far I haven't found how other elements are ignoring/removing this
> offset.
> 
> I can see that if I add `mpegtsmux ! tsdemux` to the pipeline after the
> `h264parse` the offset seems to be removed by the `mux` and things then work
> as expected.
> 
> But I cant really see how it is doing it or how I should go about properly
> fixing the interpipe elements.
> 
> So far my backup plan is to, as you say, to try re-timstamp the frames by
> subtracting the offset...
> 
> 
> 
> --
> Sent from: http://gstreamer-devel.966125.n4.nabble.com/
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