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How to display CSI-captured video on MIPI LCD & HDMI at the same time

Question asked by Otto Blom on Dec 2, 2015
Latest reply on Dec 14, 2015 by Yuri Muhin

Hi There,

 

We are using the 3.10.17 Yocto release for our iMX6. Capturing video over the parallel CSI port and displaying it on a MIPI LCD or HDMI works fine, however not at the same time.

 

//MIPI LCD Output

gst-launch tvsrc !  mfw_v4lsink

 

//HDMI Output

gst-launch tvsrc !  mfw_v4lsink device=/dev/video18 disp-width=1920 disp-height=1080

 

We have tried using "tee" or even modifying the tvsrc driver to allow multiple clients, but the CPU usage goes up to 100% and frames are dropped in HD modes.

 

This should be a fairly common scenario so I'm suspecting we are doing something wrong. Any ideas on how this can be accomplished ?

 

Later we need to feed the CSI video to the encoder as well as the LCD & HDMI

 

Any help is appreciated

 

/Otto

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