[gst-devel] H.264 streaming: choppy video + timestamp warnings

Kapil Agrawal kapil.agl at gmail.com
Wed Jul 21 07:19:26 CEST 2010


Try using sync=false at the end of your decode pipeline.
The warning you pointed says that sink is dropping, as it getting late


On Wed, Jul 21, 2010 at 12:16 AM, Parisot, Adam <Adam.Parisot at barco.com>wrote:

> Hi all,
> I'm trying to develop a GStreamer-based application to receive and
> display H.264 video from a network source.  The protocol is not
> particularly important.  I've tried raw UDP with MPEG-TS encapsulation
> as well as RTP with no encapsulation and I'm seeing the same performance
> issue in both cases.
> Video starts skipping badly shortly after initiating playback and I see
> these warnings from GStreamer:
> > 0:00:03.165877350 21089       0xb09010 WARN                basesink
> gstbasesink.c:2686:gst_base_sink_is_too_late:<sink> warning: A lot of
> buffers are being dropped.
> > 0:00:03.165917755 21089       0xb09010 WARN                basesink
> gstbasesink.c:2686:gst_base_sink_is_too_late:<sink> warning: There may
> be a timestamping problem, or this computer is too slow.
> I can stream point-to-point between two instances of VLC just fine, so I
> don't think there's an inherent problem with the hardware or network.
> My pipeline looks like this (for UDP + MPEG-TS):
> > udpsrc port=8200 caps="video/mpegts" \
> >   ! mpegtsdemux \
> >   ! ffdec_h264 \
> >   ! glimagesink
> I have tried inserting a queue at various points in the pipeline and an
> "h264parse" element before the decoder, but neither brings any
> noticeable improvement.
> Also, the GStreamer core and good/bad/ugly plugin sets are all at the
> latest released revisions.
> Can anyone offer any insight as to what might be causing this behavior?
> --
> Regards,
> Adam
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www.mediamagictechnologies.com (Gstreamer, ffmpeg, Red5, Streaming)
twitter handle: @gst_kaps
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