hm97019
Posts: 1
Joined: Tue Jan 12, 2021 4:22 am

Pi 4 raspivid dual screen preview

Tue Jan 12, 2021 4:43 am

Hi,

I started learning linux and pi system not long ago.
I am working with pi camera v2 and raspivid for live-view but having issue with preview. I want to display preview on the second, HDMI-2, display of RPi4 but it seems that it is not included in document how to. Is there a way to do so or is it not supported yet?

And is there other program that are similar to raspivid other than fswebcam?

ethanol100
Posts: 667
Joined: Wed Oct 02, 2013 12:28 pm

Re: Pi 4 raspivid dual screen preview

Tue Jan 12, 2021 12:32 pm

There was this commit. I think it can be done by just adding "-dn 7" to raspivid to display the preview on the second HDMI monitor.

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HermannSW
Posts: 4269
Joined: Fri Jul 22, 2016 9:09 pm
Location: Eberbach, Germany
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Re: Pi 4 raspivid dual screen preview

Tue Jan 12, 2021 6:51 pm

You can send output to different displays with python as well.
Any you can have two active at same time camera preview windows, one per display, with python:
viewtopic.php?f=43&t=232991&p=1582997&h ... w#p1582997
Image
https://stamm-wilbrandt.de/2wheel_balancing_robot
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://github.com/Hermann-SW/raspiraw
https://stamm-wilbrandt.de/en/Raspberry_camera.html

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