[gst-devel] Start recording from a webcam already playing

[René Stadler]

Marc wrote:
> Hi,
> 
> I am trying to build an application more or less like Cheese 
> (http://projects.gnome.org/cheese/). However I would like to switch from 
> just showing the webcam to a recording state "smoothly" when the user 
> press the record button.
> 
> So far I have tried the following approaches without succes:
> 
>    1. Changing location property of filesink while playing (from
>       /dev/null to a real path). This is not possible (filesink tells me
>       so).
>    2. Open 2 different pipelines both of them pointing to the same
>       v4l2src (no success since only one pipeline can access the webcam
>       at once).
> 
> Since these approaches were not working I tried to set the pipeline to 
> STATE_NULL, change the location of the filesink, and then set the 
> pipeline to STATE_PLAYING again. However, when setting the pipeline to 
> STATE_NULL, no STATE_CHANGE event is thrown. Is this the expected behavior ?
> 
> Any ideas ? Can the smooth "play-to-record" be accomplished with GStreamer ?
> 
> Thank you
> PD. For the record: I am programming in Python and the pipeline I am 
> trying to manage is the following:
> 
> gst-launch-0.10 v4l2src ! tee name=videoout ! queue ! videorate ! 
> video/x-raw-yuv,fps=15 ! queue ! theoraenc quality=60 ! queue ! muxout. 
> pulsesrc ! audio/x-raw-int,rate=22000,channels=1,width=16 ! queue ! 
> audioconvert ! vorbisenc ! queue ! muxout. oggmux name=muxout ! filesink 
> location=test.ogg videoout. ! queue ! ffmpegcolorspace ! ximagesink
> 
> -- 
> Marc S.
> 

I added an element called "camerabin" to gst-plugins-bad today, I think it is 
exactly what you are looking for.

-- 
Regards,
   René Stadler