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two camera preview at the same time on i.mx8m

Question asked by Richard Hu on Jul 17, 2018
Latest reply on Sep 30, 2018 by Rita Wang

Hello, Sir:

 

Our board have two MIPI-CSI2 interfaces and I can have two camera preview separately (not the same time).

 

I'm trying to enable two camera preview simultaneously on HDMI on i.mx8m.

I use gstreamer to output to waylandsink or kmssink but can't get it work.

 

The software is Yocto rocko (linux 4.9.88 BSP).

 

I refer to

https://medium.com/@petehouston/play-two-webcams-in-mjpg-format-simultaneously-using-gstreamer-2302ca91504

to give instruction:

gst-launch-1.0 tee name=splitter \
v4l2src io-mode=2 device=/dev/video0 \
! video/x-raw,width=640, height=480 \
! waylandsink splitter. v4l2src io-mode=2 device=/dev/video1 \
! video/x-raw,width=640, height=480 \
! waylandsink splitter.

refer to

https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=207953&p=1287530#p1288133

to give instruction:

gst-launch-1.0 -vv \
v4l2src io-mode=2 device=/dev/video0 ! \
videobox autocrop=true border-alpha=0 top=-70 bottom=-70 right=-220 ! \
videomixer name=mix ! \
video/x-raw,width=640, height=480 ! \
waylandsink \
v4l2src io-mode=2 device=/dev/video1 ! \
videobox autocrop=true border-alpha=0 top=-70 bottom=-70 left=-220 ! \
mix.

 

Is there any way to preview two MIPI-CSI2 camera at the same time?

 

Thank you~!

 

BR,

 

Richard

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