how to change sources while pipeline is on PLAYING state?

Tim-Philipp Müller t.i.m at zen.co.uk
Sat Sep 14 08:59:33 PDT 2013


On Wed, 2013-09-11 at 18:32 +0100, narcisse doudieu siewe wrote:

Hi,

> you should read the gstreamer doc available at its website!!!

Not that I disagree, but that's not a very useful thing to suggest,
without providing at least some more details, such as what documents,
and what topics to read up on...

Cheers
 -Tim

> 
> ______________________________________________________________________
> De : Lautaro Woites <lauchapc87 at gmail.com>
> À : Discussion of the development of and with GStreamer
> <gstreamer-devel at lists.freedesktop.org> 
> Envoyé le : Mercredi 11 septembre 2013 17h01
> Objet : how to change sources while pipeline is on PLAYING state?
> 
> 
> Hi all again.
> 
> I'm using gstreamer 0.10.36 and I have a pipeline like this:
> 
> filesrc ! decodebin2 ! valve ! queue2, ! videorate ! video_scale !
> xvimagesink
> 
> I'm trying to change the filesrc/decoder when the pipeline is on
> PLAYING state. I've tried the following:
> 
> 1) create the new filesrc and decoder
> 
> 2) close the valve
> 
> 3) set filesrc and decoder on NULL state
> 
> 4) remove the filesrc and decoder from the pipeline
> 
> 5) add the new filesrc and decoder to the pipeline
> 
> 6) link them and set to playing
> 
> This doesn't work for me (the video freezes when I remove the
> filesrc).
> 
> I've also tried to send a FLUSH_STOP event before step 6). This work
> better but:
> 
> * The sources have started to change but they hasn't started from the
> beginning. For example, if I change the filesrc in second 10, the new
> filesrc starts playing from second 10.
> 
> * and almost in every source change  the video freezes notoriously
> 
> I still don't know if this the correct/standard way to do this. Can
> someone help me? 
> 
>  Thanks in advance
>  
> 
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> 
> 
> 
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