Improve performance desktop recording

[Nicolas Dufresne]

Some hints, videobox is very slow, try not using it if possible, you
can replace with videocrop in some cases. You could replace videomixer
with compositor, which is better designed for live. Use the pad
properties on the compositor to place the incoming video in your
composition.

If you have GL, you could try and do the composition using glvideomixer
and other GL elements.

good luck,
Nicolas

Le dimanche 22 novembre 2015 à 01:50 -0800, iiddnn a écrit :
> How can I improve the performance of a desktop recording with
> integrated
> webcam stream?
> I tried the pipeline below, and it works, but the performance is very
> bad.
> Records only a fraction of the frame from the webcam stream. thx
> 
> ####
> gst-launch-1.0  --gst-debug=3 \
> videomixer name=mix \
> ! videoconvert \
> ! queue \
> ! videorate \
> ! vp8enc  min_quantizer=10 max_quantizer=10 cpu-used=2
> deadline=1000000 
> threads=2 \
> ! queue \
> ! mux. pulsesrc \
> ! queue \
> ! audioconvert \
> ! vorbisenc \
> ! queue \
> ! mux. webmmux name=mux \
> ! filesink location=screencast.webm ximagesrc \
> ! mix. v4l2src do-timestamp=true \
> ! video/x-raw,format=YUY2,width=640, height=480, interlaced=false,
> pixel-aspect-ratio=1/1, framerate=30/1 \
> ! videobox border-alpha=0 top=-20 left=-25 \
> ! mix.
> ####
> 
> 
> 
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