I am trying to create virtual web camera using GStreamer and v4l2loopback. The problem is that I want to use Playbin but the video speed is too fast when I use it. For instance, it happens when I execute the following command:
gst-launch-1.0 -v playbin uri=file:/vagrant/test.avi
video-sink="videoconvert
! videoscale
! video/x-raw,format=YUY2,width=320,height=320
! v4l2sink device=/dev/video0"
Adding "framerate=20/1" to the caps throws "Not negotiated error" while setting it to "30/1" works but doesn't help to fix the issue with the speed.
On the other hand, I am getting normal speed when executing the following command:
gst-launch-1.0 -v filesrc location=/vagrant/test.avi
! avidemux
! decodebin
! videoconvert
! videoscale
! "video/x-raw,format=YUY2,width=320,height=320"
! v4l2sink device=/dev/video0
I tried a lot of combinations with filters from the last example with the Playbin but none of them helped.
Any help would be highly appreciated!