streaming recorded TS over UDP

[Tim Müller]

On Tue, 2019-04-16 at 17:22 +0200, Lajos Okos wrote:

Hi Lajos,

> I have a recorded HLS stream created with hlssink2 that I would like
> to stream with the below pipeline:
> 
> gst-launch-1.0 \
>   2   souphttpsrc location=http://.../.../playlist.m3u8 ! \
>   3   hlsdemux ! \
>   4   tsparse set-timestamps=true ! \
>   5   rtpmp2tpay ! \
>   6   udpsink sync=true host=239.211.8.222 port=1234
> 
> I can play the multicast stream from the pipeline with VLC more or
> less ok, although time to time the picture freezes and I lose audio. 
> 
> Configuring some logging for tsparse, I can see that it pushes
> buffers out with quite a large variation in duration. Sometimes the
> buffers have duration of 5-6 seconds other time they are just a
> fraction of a second. Checking the stream in Wireshark the bitrate of
> the player's multicast stream varies a lot. Is there a way to keep
> the duration of the pushed buffers from tsparse low? I guess the
> large variation of the output bitrate is due to the fact that the
> elements following tsparse underrun but this is just guessing. Any
> suggestions on how to change the pipeline that the output bitrate
> stays more or less static with just a reasonable variation?
> 
> Many thanks for your suggestions!

If you suspect that the elements following tsparse underrun, then a
generous queue might help (queue max-size-time=30000000000 max-size-
bytes=0 max-size-buffers=0 or somesuch perhaps).

Cheers
 Tim

-- 
Tim Müller, Centricular Ltd - http://www.centricular.com