playing live mpegts stream over udp

[Tim-Philipp Müller]

On Mon, 2012-12-03 at 11:19 +0100, Angel Martin wrote:

Hi Angel,

> To control the jitter you can use gstrtpjitterbuffer. Anyway your
> pipeline seems weird for me (where is the depayloader?):

I was assuming he is sending MPEG-TS over UDP without any additional RTP
payloading. In which case rtpjitterbuffer won't do much (the ts demuxer
should theoretically take care of what the jitterbuffer does), and no
depayloader is required.

 Cheers
  -Tim

> gst-launch udpsrc uri=udp://localhost:5004 caps="application/x-rtp,
> media=(string)video, clock-rate=(int)90000,
> encoding-name=(string)MP2T-ES, payload=(int)33" ! gstrtpjitterbuffer
> latency=200 ! application/x-rtp ! rtpmp2tdepay ! video/mpegts !
> mpegtsdemux ! video/x-h264 ! queue ! decodebin ! autovideosink
> 
> 
> Best,
> 
> 
> Angel
> 
> 2012/11/28 Tim-Philipp Müller <t.i.m at zen.co.uk>
>         On Tue, 2012-11-27 at 20:52 -0800, Sudhirkumar wrote:
>         
>         Hi,
>         
>         > We are able to display an mpeg-stream over udp on DM3730.
>         > The video resolution is 1280x720 with 60fps.
>         >
>         > gst-launch -v udpsrc uri="udp://192.168.10.40:5544" !
>         mpegtsdemux !
>         > h264parse ! TIViddec2 ! queue ! tidisplaysink2
>         >
>         > But, when streaming an video of resolution 640x480 60fps,
>         the video display
>         > is playing with delay.
>         > i.e its taking time to buffer and then play, whereas when
>         streaming an video
>         > of 1280*720 it is playing smoothly.
>         >
>         > Can anyone suggest what could be the issue
>         
>         
>         It might be in TIViddec2, IIRC there is an internal buffer of
>         some sort,
>         and it waits for that to be full before decoding (to be sure
>         it's got at
>         least one frame or something). That was on a different board
>         though, but
>         might still apply. You can put an identity element before
>         TIViddec2 and
>         the video sink to see when the first buffer goes through the
>         pipeline
>         where.
>         
>         Cheers
>          -Tim
>         
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> 
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