[gst-devel] How to let cheese switch between video mode and photo mode without interupting video

[Stefan Kost]

Hi,

Jaap A. Haitsma schrieb:
> Hi,
> 
> I guess some of you are familiar with the cheese webcam program [1]
> Cheese used to have two pipelines (one for taking a picture and one
> for recording a video). We refactored that code and made one pipeline
> to which we connect a photo_bin or video encoding bin to the pipeline
> depending on if we are in video or photo mode.
> 
> In order to do that we need to stop and start the pipeline. Therefore
> the video is interupted
> 
> So what we would like is have 2 pipelines running.

What about running one pipeline with a switch element. I haven't used it yet
myself. If that does not work using a tee and pad blocking could also work.

Stefan

> 
> One that is always grabbing and displaying the video. That pipeline
> can  use a handoff signal so we can receive all the frames in a
> callback.
> 
> Taking a picture is trivial in that case. Just store a one of the frames.
> 
> The second pipeline encodes the video. That pipeline is started when
> recording of video is started/stopped when the user presses the
> appropriate buttons. This pipeline should get it's input frames from
> a callback. The question now is how do you push the frames we receive
> in the callback in the encoding pipeline?
> 
> Or maybe there is a better way to achieve no video interuptions in
> some other way
> 
> Thanks
> 
> Jaap
> 
> 
> 
> 
> 
> Jaap
> 
> [1] http://www.gnome.org/projects/cheese/
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2005.
> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel