[Live-devel] Live555 RTSP server ---- libav packet->pts always 0

[David Cassany Viladomat]

Hi franco,

I think the issue you are experimenting is more related to FFMPEG or LIBAV
than Live555. I am trying achieve the same you are tyring to, however I
don't have much time to dedicate to it. Up to now I am using the same
approach you suggested (using the current system time in PTS == 0 and
starting to increase it with PTS units) with some sort of success, however
I don't like this hacky solution, I am pretty sure there is a better
approach.

After digging a while I managed to find timing information in
AVFormatContext struct of FFMPEG. Get the RTSPState from priv_data, then
from there get the RTSPStream and then the RTPDemux. RTPDemuxContext
structure has RTCP information and timestamps, I believe there you can find
some sort of absolute timestamp.

I hope it is useful, and I'd be pleased to know if you managed to solve it
this way, as I am on the same way too ;)

Regards,
David


2016-03-08 14:25 GMT+01:00 Franco Miceli <franco at radixcast.com>:

> Hello,
>
> I have implemented a live streamer based on live555 and am using a
> receiver based on libav.
>
> The live stream is received and played back correctly.
>
> My issue is that, although I set a time value to the presentation time
> (fPresentationTime) in live555, the pts of the packet is always 0 when
> I receive the packet with av_read_frame.
>
> Should I be setting fPresentationTime in some particuar way (using
> getTimeOfDay now)?
> Is there any way I can test this with the openRTSP player?
>
> Thanks for any help.
>
> Regards,
>
> --
> Eng. Franco Miceli
> _______________________________________________
> live-devel mailing list
> live-devel at lists.live555.com
> http://lists.live555.com/mailman/listinfo/live-devel
>
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