<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <meta name="Generator" content="Microsoft Exchange Server"> <style></style> </head> <body> <meta content="text/html; charset=UTF-8"> <style type="text/css" style="">  </style> <div dir="ltr"> <div id="x_divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Arial,Helvetica,sans-serif"> <p>Hello, Anton</p> <p><br> </p> <p>I don`t believe gstreamer have solution fro this. It can not know about specific features of your hardware.</p> <p><br> </p> <p>As a solution, can you feed pipeline with "silence" audio during cleaning of the video buffer?</p> <p><br> </p> <p>Mikl</p> </div> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> gstreamer-devel <gstreamer-devel-bounces@lists.freedesktop.org> on behalf of Anton Protopopov <aspsk2@gmail.com><br> <b>Sent:</b> Wednesday, February 15, 2017 6:03:02 PM<br> <b>To:</b> gstreamer-devel@lists.freedesktop.org<br> <b>Subject:</b> Audio/video synchronization with pre-buffered video</font> <div> </div> </div> </div> <font size="2"><span style="font-size:10pt;"> <div class="PlainText">Hello everyone,<br> <br> I have a pipeline with live H264 video source and live AAC audio<br> source muxed together using mpegtsmux. One problem with this pipeline<br> is that the video encoder hardware can buffer some number of frames,<br> so when I am creating and setting a pipeline to PLAYING state, there<br> could be already, say, 1-2 seconds of video buffered. Audio is not<br> buffered in hardware. So when the pipeline is set to the PLAYING<br> state, video source produces a set of frames with almost the same time<br> stamps and several first seconds of video are corrupted (they contain<br> old video frames with some audio frames). Is there a way to<br> synchronize such sources without dropping video frames?<br> <br> Thanks,<br> Anton<br> _______________________________________________<br> gstreamer-devel mailing list<br> gstreamer-devel@lists.freedesktop.org<br> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> </div> </span></font> </body> </html>