Combining 2 Video Streams Side by Side, Getting Choppy Results

[Jim Ruxton]

I am trying to combine 2 video streams. One from my laptop camera and 
one from an external webcam. I'm using the following pipeline and 
getting very choppy results. Neither my CPU or GPU seem to be working 
hard. Any ideas how to make this less choppy?

*./gst-launch-1.0 v4l2src device=/dev/video**4**! videoscale ! videoconvert ! video/x-raw,format=YUY2, framerate=30/1, 
width=***640***, height=***480****! ****alpha********alpha=1***! videobox border-alpha=0 left=-640 ! videomixer name=Mix ! 
videoconvert ! autovideosink v4l2src device=/dev/video***2***! videoscale ! videoconvert ! video/x-raw, format=YUY2, framerate=30/1, 
width=***640***, height=***480****! ****alpha********alpha=1***! videobox border-alpha=0 right=-640 ! Mix.*

Thanks,

Jim


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