backward seeking
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Anybody know why backward seeking causes playback to hang?
gst_element_seek(m_bin, -2.0 , GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT, GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_SET, curpos*GST_MSECOND); Am I calling this wrong? Keep your kids safer online with Windows Live Family Safety. Help protect your kids. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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On Thu, 2008-07-24 at 20:52 +0000, Ash wrote:
> Anybody know why backward seeking causes playback to hang? > > gst_element_seek(m_bin, -2.0 , GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | > GST_SEEK_FLAG_KEY_UNIT, > GST_SEEK_TYPE_SET, 0, > GST_SEEK_TYPE_SET, curpos*GST_MSECOND); > > Am I calling this wrong? > > > ______________________________________________________________________ not implemented everywhere yet. You should check the return value from gst_element_seek - was the seek refused? J. -- Jan Schmidt <[hidden email]> ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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The seek returns true but just hangs. Are there any other messages I can see as to what is really happening in the pipeline? > From: [hidden email] > To: [hidden email] > Date: Fri, 25 Jul 2008 00:08:46 +0100 > Subject: Re: [gst-devel] backward seeking > > On Thu, 2008-07-24 at 20:52 +0000, Ash wrote: > > Anybody know why backward seeking causes playback to hang? > > > > gst_element_seek(m_bin, -2.0 , GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | > > GST_SEEK_FLAG_KEY_UNIT, > > GST_SEEK_TYPE_SET, 0, > > GST_SEEK_TYPE_SET, curpos*GST_MSECOND); > > > > Am I calling this wrong? > > > > > > ______________________________________________________________________ > Whether reverse playback works depends on the container & codecs - it's > not implemented everywhere yet. You should check the return value from > gst_element_seek - was the seek refused? > > J. > -- > Jan Schmidt <[hidden email]> > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel Time for vacation? WIN what you need. Enter Now! ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Hi!
If you set the start time at 0, a backward seeking will try to seek to negatives values. It will place your stream at 0 mseconds and then it will try to go backward witch is imposible as it's the end of the stream. Try changing your start time to curpos*GST_MSECOND. It will seek to a new position with positive values and your stream will be played backward to the 0 position. 2008/7/25 Ash <[hidden email]>:
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Hello,
I actually noticed that and changed my call to: ret = gst_element_seek (m_bin, -1.0 * speed/1000, GST_FORMAT_TIME, m_seekflags, GST_SEEK_TYPE_SET, curpos*GST_MSECOND, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE); But this still hangs, whether the rate is -1.0 or -2.0. Is there anything wrong with this? Date: Fri, 25 Jul 2008 18:11:23 +0200 From: [hidden email] To: [hidden email] Subject: Re: [gst-devel] backward seeking Hi! If you set the start time at 0, a backward seeking will try to seek to negatives values. It will place your stream at 0 mseconds and then it will try to go backward witch is imposible as it's the end of the stream. Try changing your start time to curpos*GST_MSECOND. It will seek to a new position with positive values and your stream will be played backward to the 0 position. 2008/7/25 Ash <[hidden email]>:
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In reply to this post by Andoni Morales
Has any developer out there gotten backward seek (negative rate) to work with GST_FORMAT_TIME?
Date: Fri, 25 Jul 2008 18:11:23 +0200 From: [hidden email] To: [hidden email] Subject: Re: [gst-devel] backward seeking Hi! If you set the start time at 0, a backward seeking will try to seek to negatives values. It will place your stream at 0 mseconds and then it will try to go backward witch is imposible as it's the end of the stream. Try changing your start time to curpos*GST_MSECOND. It will seek to a new position with positive values and your stream will be played backward to the 0 position. 2008/7/25 Ash <[hidden email]>:
Keep your kids safer online with Windows Live Family Safety. Help protect your kids. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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On Fri, 2008-07-25 at 20:08 +0000, Ash wrote:
> Has any developer out there gotten backward seek (negative rate) to > work with GST_FORMAT_TIME? What demuxer and which decoders are you trying this with? Cheers -Tim ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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I am using automatic playbin and tried it on avi files , mpeg files, wmv files and all exhibit the same behavior. Is there a particular demux/decoder that you know works for sure?
> From: [hidden email] > To: [hidden email] > Date: Fri, 25 Jul 2008 21:27:26 +0100 > Subject: Re: [gst-devel] backward seeking > > On Fri, 2008-07-25 at 20:08 +0000, Ash wrote: > > Has any developer out there gotten backward seek (negative rate) to > > work with GST_FORMAT_TIME? > > What demuxer and which decoders are you trying this with? > > Cheers > -Tim > > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel Time for vacation? WIN what you need. Enter Now! ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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In reply to this post by Ash-25
On Fri, Jul 25, 2008 at 08:08:49PM +0000, Ash wrote:
> Has any developer out there gotten backward seek (negative rate) to work with GST_FORMAT_TIME? Yep. gint64 start_pos, stop_pos; if (rate > 0) { start_pos = new_pos; stop_pos = -1; // or whatever > new_pos } else { start_pos = 0; // or whatever < new_pos stop_pos = new_pos; } if (!gst_element_seek (pipeline, rate, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH, GST_SEEK_TYPE_SET, start_pos, GST_SEEK_TYPE_SET, stop_pos)) { g_message ("Seek failed"); } I've only had luck with ogg-vorbis and ogg-theora. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Thank you Rov. I have similar results in that ogg files work with backward seek, but no luck with mpeg1/mpeg2/wmv/mp3. Any idea what the problem is? Is it just not developed yet?
> From: [hidden email] > To: [hidden email] > Date: Sat, 26 Jul 2008 10:55:24 -0400 > Subject: Re: [gst-devel] backward seeking > > On Fri, Jul 25, 2008 at 08:08:49PM +0000, Ash wrote: > > Has any developer out there gotten backward seek (negative rate) to work with GST_FORMAT_TIME? > > Yep. > > gint64 start_pos, stop_pos; > if (rate > 0) { > start_pos = new_pos; > stop_pos = -1; // or whatever > new_pos > } else { > start_pos = 0; // or whatever < new_pos > stop_pos = new_pos; > } > if (!gst_element_seek (pipeline, rate, > GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH, > GST_SEEK_TYPE_SET, start_pos, > GST_SEEK_TYPE_SET, stop_pos)) { > g_message ("Seek failed"); > } > > I've only had luck with ogg-vorbis and ogg-theora. > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel Use video conversation to talk face-to-face with Windows Live Messenger. Get started. ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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