slow playback in streaming client

[Chuck Crisler]

First, take a wireshark trace on the client to see the rate that the
packets are arriving. Do you really need the h264parse on the server? You
should also add a jitterbuffer on the client between the udpsrc and the
rtph264depay. Is this going over hardwire network or WiFi?

On Sat, Jul 25, 2015 at 10:14 AM, suspension <manusha1980 at gmail.com> wrote:

> I have the following streaming source:
> gst-launch  -v filesrc location=<file.mkv> ! decodebin ! vpuenc codec=6 !
> video/x-h264 ! h264parse ! rtph264pay config-interval=1 pt=96 ! udpsink
> host=224.25.2.55 port=5000
>
> And following client:
> gst-launch udpsrc uri=udp://224.25.2.55:5000  caps="application/x-rtp,
> media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264,
> sprop-parameter-sets=(string)\"Z0JAHqaA1C2QAA\\=\\=\\,aM44gAA\\=\",
> payload=(int)96, ssrc=(uint)2905425995, clock-base=(uint)1674913653,
> seqnum-base=(uint)52583" ! rtph264depay ! ffdec_h264 ! queue !
> autovideosink
>
> This works, but playback speed fluctuates in the client. It plays properly
> for half a second, slows down for a half a second, again plays at normal
> speed and so on.
>
> I have tried following already without any luck.
> Use mpeg4 encoding
> Changing various properties in udpsrc, udpsink, rtph264pay, vpuenc, etc.
> Used loop-back address rather than multicast
> directly streaming H264
>
> What am I doing wrong? It looks like client is running out of data to play.
> The Server pipeline runs in a IMX6 based platform and uses hardware
> accelerated decoder/encoder. The top command in that machine shows very
> little use of CPU.
>
> Sometime I see following warnings in the client machine:
> There may be a timestamping problem, or this computer is too slow.
> WARNING: from element
>
> /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXvImageSink:autovideosink0-actual-sink-xvimage:
> A lot of buffers are being dropped.
> Additional debug info:
> gstbasesink.c(2875): gst_base_sink_is_too_late ():
>
> /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXvImageSink:autovideosink0-actual-sink-xvimage:
>
>
> But my client machine is a modern laptop and should not have any issue
> decoding and displaying this video.
>
> The video in concern is of HD quality.
>
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>
> --
> View this message in context:
> http://gstreamer-devel.966125.n4.nabble.com/slow-playback-in-streaming-client-tp4672848.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
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-- 
___________________________________________________
Name
*Chuck Crisler*

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