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<p class="MsoNormal"><span lang="EN-US">Hello everyone,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a system that provides me with raw encoded video frames on demand, current encodings are H264, MJPEG and H265.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am creating a buffer for each frame and using Appsrc as the entry point into a pipeline to render them. The pipelines are created in code but their launch line equivalents are shown below<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US">appsrc caps=”video/x-h264” format=time block=true is-live=true | queue | h264parse | avdec_h264 | autovideosink<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US">appsrc caps=”image/jpeg” format=time block=true is-live=true | queue | jpegdec | autovideosink<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:36.0pt"><span lang="EN-US">appsrc caps=”video/x-h265” format=time block=true is-live=true | queue | h265parse | avdec_h265 | autovideosink<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In addition to the video data the application also provides a couple of timestamps, one for the current frame and one for the next.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From this information, I can determine the duration of each frame and add this to the buffer that I push into Appsrc (code snippet below)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Using GstSharp V1.16.0 with gstreamer v1.16.0 (code based on the appsrc example in the Application Development Manual, from the Pipeline Manipulation section)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> buffer.PTS = _timestamp;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> var duration = </span><span style="font-size:9.5pt;font-family:Consolas;color:black">Gst.Util.Uint64Scale(durationInMs, Gst.Constants.SECOND, 1000);</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> buffer.duration = duration;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> _timestamp += duration<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> var flowReturn = appsrc.PushBuffer(buffer)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This all works fine when pushing h264 and mjpeg frames but I am having no luck with H265, video appears frozen for long periods interspersed with brief playback of a few frames.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">Any help or information would be appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kind Regards<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Jon<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PS<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have found that H265 works if I let appsrc do the timestamping. However, this breaks h264 and mjpeg, they appear to play as fast as the frames can be delivered<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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