[gst-devel] Re : Re : Sending seek events to correct pipelines

[Wim Taymans]

On Fri, 2008-11-14 at 15:50 +0000, Albert Costa wrote:
> Thanks Wim, 
> I've tried as follows for testing:
>  
> [create and set all the elements and properties...]
> gst_bin_add_many(GST_BIN(pipeline), filesrc1, decodebin1,
> ffmpegcolorspace1, directdrawsink1, filesrc2, decodebin2,
> ffmpegcolorspace2, directdrawsink2, NULL);
> [link filesrc1, decodebin1, ffmpegcolorspace1, directdrawsink1
> together, and filesrc2, decodebin2, ffmpegcolorspace2, directdrawsink2
> together as distinct lines]
> gst_element_set_state (pipeline, GST_STATE_PLAYING);
> 
>  
> 
> then
> 
> gst_element_send_event (pipeline, seek_event); -> ok but both filesrc1
> & filesrc2 get the seek event (not what I want)
> 
> 
> gst_element_send_event (filesrc1, seek_event); -> not sent (returns 0)
> gst_element_send_event (decodebin1, seek_event); -> sent (returns 1)
> but nothing happens (seek not handled)
>  
> I don't know why this won't work, but if I understand what you wrote
> in the first reply, there's no way to set the seek only on one of the
> lines.

Yes there is, send the event to the relevant sink.

Wim

> Regards,
> Al
>  
> 
> ______________________________________________________________________
> De : Wim Taymans <wim.taymans at gmail.com>
> À : Discussion of the development of GStreamer
> <gstreamer-devel at lists.sourceforge.net>
> Envoyé le : Vendredi, 14 Novembre 2008, 15h23mn 32s
> Objet : Re: [gst-devel] Re : Sending seek events to correct pipelines
> 
> On Fri, 2008-11-14 at 14:13 +0000, Albert Costa wrote:
> > Hi Wim,
> > is there any way of sending the event to only the specific element
> > (one of the filesrc elements in my case) I need?
> > If I try to send the seek with gst_element_send_event
> > (pipeline1.source, seek_event) (where pipeline1.source would of
> course
> > be my video source), then it seems the event is not sent (returns
> > false). Sending to pipeline1 itself returns ok, but seems not to be
> > taken into account anyway.
> > Regards,
> > Al
> 
> You can send the event to any element that is driving the pipeline,
> which may or may not be the source. In a typical playback pipeline,
> the
> demuxer is pushing data into the pipeline.
> 
> Wim
> 
> > 
> > > However I want to send specific seek events for each pipeline (to
> > > access specific parts of the video files I play). If I use
> > > gst_element_send_event (mainpipeline, my_seek_event) then I got
> one
> > of
> > > the file beeing seek, but it is not sure which line received the
> > > event. And if I use gst_element_send_event (pipeline1,
> > > my_seek_event_1) and gst_element_send_event (pipeline2,
> > > my_seek_event_2) then it seems that none of the events is catched
> > nor
> > > processed.
> > 
> > Sending the event to a pipeline/bin will send the event to all sinks
> > (or
> > bins with sinks in them) so both pipelines should receive the event.
> > 
> > 
> >
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