<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> </head> <body text="#000000" bgcolor="#ffffff"> <br> <br> -------- Original Message -------- <table class="moz-email-headers-table" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <th valign="BASELINE" align="RIGHT" nowrap="nowrap">Subject: </th> <td>Re: Audio and Video Timestamp or Offset Problems</td> </tr> <tr> <th valign="BASELINE" align="RIGHT" nowrap="nowrap">Date: </th> <td>Tue, 19 Jul 2011 14:05:15 -0500</td> </tr> <tr> <th valign="BASELINE" align="RIGHT" nowrap="nowrap">From: </th> <td>William Metcalf <a class="moz-txt-link-rfc2396E" href="mailto:wmetcalf@niftytv.com"><wmetcalf@niftytv.com></a></td> </tr> <tr> <th valign="BASELINE" align="RIGHT" nowrap="nowrap">To: </th> <td>Wim Taymans <a class="moz-txt-link-rfc2396E" href="mailto:wim.taymans@gmail.com"><wim.taymans@gmail.com></a></td> </tr> </tbody> </table> <br> <br> <pre>Wim, Thank you very much for your quick response. I have a few questions about the min-latency property. The gst-inspect of the appsrc element shows the min-latency property, but it only shows that the property is an int64. Is the latency measured in microseconds, milliseconds, or seconds? Also, what does the min-latency property control? The minimum latency between sent buffers? Thank you again for your help, William On 7/19/2011 1:58 PM, Wim Taymans wrote: > On 07/19/2011 08:50 PM, William Metcalf wrote: >> Hello all, >> >> I am reading in Raw Audio and Raw Video from capture cards, and then >> rendering them directly to my computer. I am able to do this fine, but >> the resulting video is ahead of the audio. My initial thought was to >> start the Audio pipeline, and then wait 2 seconds and start the video >> pipeline. When I executed this code the audio began playing sooner than >> the video as it should, but then the video just played faster until it >> was ahead of the audio again. I then tried pausing 5 seconds before I >> started the video pipeline just to see what would happen, and that time >> the video did the same thing. Because the video always plays ahead of >> the audio at the same rate, I am now thinking this problem is a >> timestamp or offset issue of some sort. Is there any way to adjust the >> Video/Audio offset, or is there a better way to delay the video so that >> it will not speed up and pass the audio? >> >> Here are my pipelines: >> video - appsrc max-bytes = 0 is-live=true typefind=true ! >> "video/x-raw-yuv,format=UYVY,width=720,height=486,framerate=30/1" ! >> autovideosink >> audio - appsrc max-bytes=0 is-live=true typefind=true ! audioparse ! >> autoaudiosink > > You forgot to configure the latency on the appsrc elements. Try > setting the min-latency property. > > Wim >> >> >> Thank you for any help you can offer, >> William >> _______________________________________________ >> gstreamer-devel mailing list >> <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> >> <a class="moz-txt-link-freetext" href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > </pre> </body> </html>