Gstreamer 1.0 python bindings, how to implement a proper seek event

[Tim-Philipp Müller]

On Thu, 2013-02-28 at 20:25 +0000, Peter Rennert wrote:
> Hi,
> 
> I am starting to test Gstreamer 1.0 with its Python bindings. I simply 
> want to increase the playback speed of the video. In gstreamer 0.10 it 
> worked like this.
> 
>         self.pbRate += 3
>          self.pipeline.send_event(gst.event_new_seek(self.pbRate, 
> gst.FORMAT_TIME,
>              (gst.SEEK_FLAG_SKIP), gst.SEEK_TYPE_NONE, 0,
>              gst.SEEK_TYPE_NONE, 0))
> 
> What would be the equivalent for gstreamer 1.0 and python? Is there some 
> documentation about the bindings somewhere?

Instead of creating a seek event an sending it you could also use
gst_element_seek(), which does the same.

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html#gst-element-seek

The code should then be something like this I think:

  self.pipeline.seek (self.pbRate, Gst.Format.TIME,
      Gst.SeekFlags.SKIP, Gst.SeekType.NONE, 0,
      Gst.SeekType.NONE, 0)

(Though not sure why you have the SKIP flag there, it's not implemented
anywhere yet I think.)

How well that will work will depend a bit on the parser/demuxer in
question. If it doesn't work, please file a bug.

Cheers 
 -Tim