Hi Florian,<br><br>Thanks for replying to my message. ffmux_mp4 did not work for me either when I posted the original message. All I got are access unit delimiter RBSP's. An acces unit delimiter RBSP is something like 000000010910 for the I frame, and 000000010030 for the non-I frame.<br> <br>Since the AU delimiter has the same timestamp as the following NAL, I was wondering whether that was a problem. And indeed it was. In the function<style type="text/css"> i { white-space: pre-wrap; }</style> compute_pkt_fields2() in file: /gst-ffmpeg-0.10.9/gst-libs/ext/ffmpeg/libavformat/utils.c<br> <br>I changed the following line to allow two consecutive packets have same time stamp:<br><br> <meta name="qrichtext" content="1"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><style type="text/css"> p, li { white-space: pre-wrap; } </style> <p style="margin: 0px; text-indent: 0px;">#if 1</p> <p style="margin: 0px; text-indent: 0px;"> if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts > pkt->dts){</p> <p style="margin: 0px; text-indent: 0px;">#else</p> <p style="margin: 0px; text-indent: 0px;"> if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){</p> <p style="margin: 0px; text-indent: 0px;">#endif</p> <p style="margin: 0px; text-indent: 0px;"></p><br>Now I can capture video correctly. I am wondering if anyone working on ffmpeg can verify whether this fix is a valid solution. Maybe I should post a separate message on ffmux_mp4.<br> <br>However, this does not solve my problem. I still need to make qtmux work since it supports the audio codec which ffmux_mp4 does not support.<br><br>Thanks,<br>Yiliang<br><br><div class="gmail_quote">On Tue, Nov 24, 2009 at 12:05 AM, florian iragne <span dir="ltr"><<a href="mailto:florian.iragne@viewsurf.com" target="_blank">florian.iragne@viewsurf.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi,<br> <br> Yiliang Bao a écrit :<br> <div>> I got this error:<br> ><br> > gstqtmux.c(1347): gst_qt_mux_add_buffer ():<br> > /GstPipeline:pipeline0/GstQTMux:qtmux0:<br> > Failed to determine time to mux.<br> <br> </div>i got the same error and have had no success using qtmux or mp4mux.<br> <div><br> > I also tried ffmux_mp4. The pipeline can continue, but it looks like that<br> > only the access unit delimiter RBSP is captured.<br> <br> </div>I use ffmux_mp4 with success in my pipeline. Could you provide yours to<br> check what's wrong?<br> <font color="#888888"><br> <br> Florian<br> </font><div><div></div><div><br> ------------------------------------------------------------------------------<br> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day<br> trial. Simplify your report design, integration and deployment - and focus on<br> what you do best, core application coding. Discover what's new with<br> Crystal Reports now. <a href="http://p.sf.net/sfu/bobj-july" target="_blank">http://p.sf.net/sfu/bobj-july</a><br> _______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.sourceforge.net" target="_blank">gstreamer-devel@lists.sourceforge.net</a><br> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a><br> </div></div></blockquote></div><br>