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imx8 gstreamer artefacts when using textoverlay with glvideomixer

Question asked by Ondrej Bilka on Mar 6, 2018
Latest reply on Mar 12, 2018 by Ondrej Bilka


We want to display output of several cameras with some captions on imx8 eval board. We have problem that if in pipeline below one waves over text there will be artefacts in form of black lines. 

Similar pipeline where we omit glvideomixer renders correctly.

Is this bug or should we add captions in different way?


START='rtspsrc location="rtsp://'$IP'/axis-media/media.amp?videocodec=h264&h264profile=main&resolution='$RX'x'$RY'&fps='$FPS'" latency='$RTSP_LATENCY' ! rtph264depay ! h264parse ! '

gst-launch-1.0 glvideomixer name=m sink_1::xpos=20 sink_1::width=300 sink_1::height=300 sink_1::ypos=20 sink_2::xpos=400 sink_2::width=300 sink_2::height=300 sink_2::ypos=100 ! glimagesink \
$START vpudec ! textoverlay text="foobar" ! m.sink_1 \
$START vpudec ! m.sink_2