imx8qmmek mipi camera frame rate

[yibhan]

hi guys,

I am checking imx8qmmek to compare camera preview speed other imx processor.

but, if i check imx8qmmek + mipi-camera(ov5640 minSAS) with below command:

: gst-launch-1.0 v4l2src ! video/x-raw,width=640,height=480 ! waylandsink

: gst-launch-1.0 v4l2src ! video/x-raw,width=640,height=480 ! autovidesink

camera preview speed is about 19 ~ 20fps not 30fps.

linux kernel version is 4.14.98-2.0.0. camera preview speed matter for my project.

For now, preview speed is low.

[igorpadykov]

Hi yibhan

one can try MEK with Demo Image  i.MX 8QuadMax MEK​

gst-launch-1.0 v4l2src ! autovideosink

gst-launch-1.0 v4l2src ! video/x-raw, width=$WIDTH, height=$HEIGHT, framerate=(fraction)&FRAMERATE ! autovideosink

Best regards
igor

[yibhan]

Hi igorpadykov,

I have checked gstreamer command as you recommended, but it still is about 20fps.

[yibhan]

Hi igorpadykov,

Thank you for reply, but, I think 15~20 fps in mipi camera of ov5640 on imx8qmmek demo image is low as you recommanded  .

1. Is there any way to enhance camera preview rate?

2. in case of imx8qpmek, is it available to use v4l2 in folder /unitest. when I checked unitest test application last week, I couldn't use them(such as mxc_v4l2_overlay.out).
: I have used "mx8_v4l2_cap_drm.out -cam 1 -ow 640 -oh 480 -of", but it is just capture function, I'd like to preview camera on display device(LVDS to HDMI)
I want to use capture and display camera capture data it means camera preview. I want to know how to preview camera in imx8qmmek for checking camera
frame rate.

3. it doesn't seem to support mxc_v4l2_overlay.out due to imx8qm structure.

Could please let me know how to use v4l2 test apps in imx8qpmmek?

Thank you