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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi,<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 my effort to write a src element, and to mix the outgoing buffers with a video stream(at the moment, I just have 1 stream, I’ll had the media later on), I need to timestamp those buffers.<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>So I tried two things:<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>First I tried calling gst_base_src_do_timestamp, but it seems to have no effect. My outgoing buffers are still not timestamped. I tried to give a clock to the source element using the gst_system_clock_obtain, or getting one from the pipeline with no chance…<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Secondly I tried timestamping the outgoing buffer myself. Wath I did is in the start, call set_clock with the system clock, and call set_base_time with time from the same clock. The in the create function I set PTSand DTS to current_time – base_time. This is not far from work, but still it seem the video sink drops a lot of frame and the display is not updated very often.<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>Any advice on how to properly set my time stamps (videomixer seems to need those).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Also, when I query the position to my pipeline, it changes only when the video sink drop frames and display a new 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>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Eric T.<o:p></o:p></span></p></div></body></html>