<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang="DE" link="#0563C1" vlink="#954F72"> <div class="WordSection1"> Hello guys,<o:p></o:p> <o:p> </o:p> i’ve encountered a very strange behavior while streaming from a v4l2src to a kmssink (or glimagesink) by using vaapi-components for decoding. The problem is, that the streaming starts for 2 seconds, then freezes for 2 seconds and continues again for 2 seconds and so on. This effect is only noticeable when using vaapi-components. If I use a pipeline with simply software decoding, the stream is displayed fluently. <o:p></o:p> <o:p> </o:p> My sending pipeline is constructed as follows:<o:p></o:p> <o:p> </o:p> gst-launch-1.0 v4l2src io-mode=dmabuf device=/dev/video$(($1+4)) ! video/x-raw,format=YV12,width=720,height=576 ! v4l2h264enc ! rtph264pay ! udpsink host=${IP} port=55555<o:p></o:p> <o:p> </o:p> Setting pipeline to PAUSED ...<o:p></o:p> Pipeline is live and does not need PREROLL ...<o:p></o:p> Setting pipeline to PLAYING ...<o:p></o:p> New clock: GstSystemClock<o:p></o:p> Redistribute latency...<o:p></o:p> <o:p> </o:p> The erroneous reading pipeline looks like this:<o:p></o:p> <o:p> </o:p> gst-launch-1.0 udpsrc port=55555 caps="application/x-rtp,media=(string)video,clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! rtph264depay ! vaapih264dec ! vaapipostproc width=720 height=576 ! glimagesink<o:p></o:p> <o:p> </o:p> Setting pipeline to PAUSED ...<o:p></o:p> Pipeline is live and does not need PREROLL ...<o:p></o:p> Got context from element 'vaapipostproc0': gst.vaapi.Display=context, gst.vaapi.Display=(GstVaapiDisplay)"$GstVaapiDisplayDRM$\ vaapidisplaydrm1";<o:p></o:p> Setting pipeline to PLAYING ...<o:p></o:p> New clock: GstSystemClock<o:p></o:p> Redistribute latency...<o:p></o:p> WARNING: from element /GstPipeline:pipeline0/GstKMSSink:kmssink0: A lot of buffers are being dropped.<o:p></o:p> Additional debug info:<o:p></o:p> ../libs/gst/base/gstbasesink.c(3005): gst_base_sink_is_too_late (): /GstPipeline:pipeline0/GstKMSSink:kmssink0:<o:p></o:p> There may be a timestamping problem, or this computer is too slow.<o:p></o:p> WARNING: from element /GstPipeline:pipeline0/GstKMSSink:kmssink0: A lot of buffers are being dropped.<o:p></o:p> Additional debug info:<o:p></o:p> ../libs/gst/base/gstbasesink.c(3005): gst_base_sink_is_too_late (): /GstPipeline:pipeline0/GstKMSSink:kmssink0:<o:p></o:p> There may be a timestamping problem, or this computer is too slow.<o:p></o:p> <o:p> </o:p> If I run the following pipeline on the same system, the stream is presented fluently without any problems:<o:p></o:p> <o:p> </o:p> gst-launch-1. 0 udpsrc port=55555 caps=\"application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96\" ! rtph264depay ! avdec_h264 ! decodebin ! videoconvert ! kmssink<o:p></o:p> <o:p> </o:p> I’m not sure what exactly the problem is. Maybe the timestamping mechanism in vaapi has a different behavior then in the avdec_h264 as the log message says? I’ve also changed log levels but I couldn’t find anything helpful. <o:p></o:p> <o:p> </o:p> Any help for further diagnostics is highly appreciated. <o:p></o:p> <o:p> </o:p> Kind regards<o:p></o:p> Michael<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> </div> <div style="background-color:#FFFFFF"> Bitte beachten / Please note! <div style="font-size:12pt; line-height:10pt; font-family:'times roman',serif;"> ******************************************************************************* AGCO GmbH Sitz der AGCO GmbH: Johann-Georg-Fendt-Str.4, 87616 Marktoberdorf, Germany Registergericht Amtsgericht Kempten HRB 10327 Geschäftsführer: Christoph Groeblinghoff, Ingrid Bussjaeger-Martin, Dr. Heribert Reiter, Ekkehart Glaeser Vorsitzender des Aufsichtsrates: Torsten Dehner ******************************************************************************* Diese E-Mail ist nur für den Empfänger bestimmt, an den es gerichtet ist und kann vertrauliches bzw. unter das Berufsgeheimnis fallendes Material enthalten. 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