<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2900.3627" name=GENERATOR></HEAD> <BODY> <DIV>Hi Kapil,</DIV> <DIV> </DIV> <DIV>Adding sync=false does improve playback significantly, going from a slide show to mostly smooth video, but the video still looks slightly choppy when compared to playing the same source locally.  Reading the documentation for the sync parameter, it sounds like the sink will display frames in whatever order they arrive in, so I'm thinking this is not the preferred solution.</DIV> <DIV> </DIV> <DIV>Regards,</DIV> <DIV>Adam</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> From: Kapil Agrawal [mailto:kapil.agl@gmail.com] Sent: 21Jul10 01:19 To: Discussion of the development of GStreamer Subject: Re: [gst-devel] H.264 streaming: choppy video + timestamp warnings </DIV> <DIV></DIV>Adam, Try using sync=false at the end of your decode pipeline. The warning you pointed says that sink is dropping, as it getting late buffers.    Best Kapil <DIV class=gmail_quote>On Wed, Jul 21, 2010 at 12:16 AM, Parisot, Adam <<A href="mailto:Adam.Parisot@barco.com">Adam.Parisot@barco.com</A>> wrote: <BLOCKQUOTE class=gmail_quote style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">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 DISCLAIMER: Unless indicated otherwise, the information contained in this message is privileged and confidential, and is intended only for the use of the addressee(s) named above and others who have been specifically authorized to receive it. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message and/or attachments is strictly prohibited. The company accepts no liability for any damage caused by any virus transmitted by this email. Furthermore, the company does not warrant a proper and complete transmission of this information, nor does it accept liability for any delays. If you have received this message in error, please contact the sender and delete the message. Thank you. <DIV> <DIV></DIV> <DIV class=h5> ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit <A href="http://sprint.com/first" target=_blank>sprint.com/first</A> -- <A href="http://p.sf.net/sfu/sprint-com-first" target=_blank>http://p.sf.net/sfu/sprint-com-first</A> _______________________________________________ gstreamer-devel mailing list <A href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</A> <A href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target=_blank>https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</A> </DIV></DIV></BLOCKQUOTE></DIV> -- <A href="http://www.mediamagictechnologies.com">www.mediamagictechnologies.com</A> (Gstreamer, ffmpeg, Red5, Streaming) twitter handle: @gst_kaps <A href="http://www.linkedin.com/in/kapilagrawal">http://www.linkedin.com/in/kapilagrawal</A> </BLOCKQUOTE>DISCLAIMER: Unless indicated otherwise, the information contained in this message is privileged and confidential, and is intended only for the use of the addressee(s) named above and others who have been specifically authorized to receive it. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message and/or attachments is strictly prohibited. The company accepts no liability for any damage caused by any virus transmitted by this email. Furthermore, the company does not warrant a proper and complete transmission of this information, nor does it accept liability for any delays. If you have received this message in error, please contact the sender and delete the message. Thank you.</BODY></HTML>