[gst-devel] Videomixing two/multiple webcams side by side

[Stefan Kost]

Am 22.05.2010 01:00, schrieb Martin Bisson:
> This question is a bit unrelated to this thread, and I'm new to 
> GStreamer, but what does queue actually do?  Why is it needed in that case?

I creates a thread barrier to decouple the capture threads from the mixing thread.

Stefan

> 
> Thanks,
> 
> Martin
> 
> 
> Kapil Agrawal wrote:
>> In your videobox add border-alpha=0 property , also use queue before 
>> videomixer input of both cameras.
>>
>> for eg.
>>
>> gst-launch-0.10 v4l2src0 ! video/x-raw-yuv,width=320,height=240 ! 
>> videobox left=-320 border-alpha=0 ! queue ! videomixer name=mix ! 
>> ffmpegcolorspace ! xvimagesink  v4l2src1 ! 
>> video/x-raw-yuv,width=320,height=240 ! queue ! mix.
>>
>> best luck
>> Kapil
>>
>> On Sat, May 15, 2010 at 12:37 AM, scottmil <scottmil at gmail.com 
>> <mailto:scottmil at gmail.com>> wrote:
>>
>>
>>     UPDATE:
>>
>>     I've made some progress.  I can get a "wider view" screen and it loads
>>     without crashing but only one camera is shown, though both are
>>     running.  So
>>     I assume one is being displayed under the other, but I cant seem
>>     to get one
>>     on one side and one on the other.
>>
>>     here is the command i'm using:
>>
>>     gst-launch v4l2src device=/dev/video0 ! videobox right=-640 !
>>     video/x-raw-yuv! videomixer name=mix ! ffmpegcolorspace ! xvimagesink
>>     sync=false v4l2src device=/dev/video1 ! queue ! video/x-raw-yuv!
>>     mix. mix.
>>
>>     --
>>     View this message in context:
>>     http://gstreamer-devel.966125.n4.nabble.com/Videomixing-two-multiple-webcams-side-by-side-tp2197804p2217082.html
>>     Sent from the GStreamer-devel mailing list archive at Nabble.com.
>>
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>>
>> -- 
>> twitter handle: @gst_kaps
>> http://www.linkedin.com/in/kapilagrawal
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