<html><head><style type="text/css"></style></head><body><div style="font-family:'times new roman', 'new york', times, serif;font-size:12pt"><div>Hi Andoni,</div><div>thanks for the tip. In fact, the seek itself is running fine, once it is active. My issue is that the pipeline starts playing from 0 before the seek really occurs, thus displaying a few frames before it moves to expected position. I've tried to seek before setting the pipeline to GST_STATE_PLAYING (put the pipe in GST_STATE_PAUSED, then seek, then set to GST_STATE_PLAYING) but it doesn't work. Is there a way to position the stream to a given seek pos before it actually starts to play?</div><div>Al</div><div style="font-family:times new roman, new york, times, serif;font-size:12pt"> <div style="font-family:arial, helvetica, sans-serif;font-size:13px"><hr size="1">De : Andoni Morales <ylatuya@gmail.com> À : Discussion of the development of GStreamer <gstreamer-devel@lists.sourceforge.net> Envoyé le : Mercredi, 8 Avril 2009, 12h27mn 41s Objet : Re: [gst-devel] question on seek 2009/4/8 Albert Costa <<a ymailto="mailto:costa_albert@yahoo.fr" href="mailto:costa_albert@yahoo.fr">costa_albert@yahoo.fr</a>>: > Hi All, > I have a simple question: I have an application where I want to display only > a subset of a video. My pipeline can be resumed to 'filesrc ! decodebin ! > ffmegcolorspace ! queue ! directdrawsink'. To see only a part of the video, > I use following : > GstEvent* seek_event; > seek_event = gst_event_new_seek (1.0, GST_FORMAT_TIME, >                 (GstSeekFlags) (GST_SEEK_FLAG_SEGMENT | > GST_SEEK_FLAG_FLUSH), >                 GST_SEEK_TYPE_SET, start_time, >                 GST_SEEK_TYPE_SET, stop_time); >               gst_element_set_state(m_pipeline, GST_STATE_PLAYING); >               gst_element_get_state(m_pipeline, NULL, NULL, > GST_CLOCK_TIME_NONE); >               gst_element_send_event(m_pipeline, seek_event); > where start/stop_time are values for the start and end positions in my file. > Everything works fine, except for the fact that just before displaying the > video at position start (and then playing up to stop position), I do see the > first (0) frame of the video. > Is there a way to avoid this and have the pipeline really starting from the > position I want? Maybe using this method is simpler: gst_element_seek (m_pipeline, 1.0,           GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE,           GST_SEEK_TYPE_SET, start_time,           GST_SEEK_TYPE_SET, stop_time); If you want accuracy in the seek, you should use the flag GST_SEEK_FLAG_ACCURATE. The seek  is slower but much more accurate. Andoni > Regards, > Al > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > High Quality Requirements in a Collaborative Environment. > Download a free trial of Rational Requirements Composer Now! > <a href="http://p..sf.net/sfu/www-ibm-com" target="_blank">http://p.sf.net/sfu/www-ibm-com</a> > _______________________________________________ > gstreamer-devel mailing list > <a ymailto="mailto:gstreamer-devel@lists.sourceforge.net" href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> > <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> > > ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! <a href="http://p.sf.net/sfu/www-ibm-com" target="_blank">http://p.sf.net/sfu/www-ibm-com</a> _______________________________________________ gstreamer-devel mailing list <a ymailto="mailto:gstreamer-devel@lists.sourceforge.net" href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </div></div><div style="position:fixed"></div></div> </body></html>