Camera Guide¶
Note
To enable camera support when building Yocto images see:
- QS8M with Raspi camera: local.conf section in NXP Yocto BSP.
- Basler cameras: Basler Camera in NXP Yocto BSP.
Camera Enablement¶
| Module | Camera | Precompiled Image | Yocto Enablement |
|---|---|---|---|
| QS8M-MQ00 | RaspberryPi Camera | n.a. | Raspi Camera |
| QSXM-MM60 | Basler daA2500-60mci | qsxm-mm60-basler in Download Area | Basler Camera |
| QSXP-ML81 | Basler daA3840-30mc | qsxp-ml81-basler in Download Area | Basler Camera |
Camera DTB¶
When your Yocto build has finished you will get different dtbs in deploy directory.
The following table gives an overview.
| Module | Camera Supported | .dtb Files |
|---|---|---|
| qs8m-mq00 on qsbase2 | RaspberryPi Camera | imx8mm-qs8m-mq00-qsbase2-dsi83-cam.dtb imx8mm-qs8m-mq00-qsbase2-raspi-display-cam.dtb |
| qsxm-mm60 on qsbase3 | Basler daA2500-60mci | imx8mm-qsxm-mm60-qsbase3-basler.dtb |
| qsxp-ml81 on qsbase3 | Basler daA3840-30mc | imx8mp-qsxp-ml81-qsbase3-basler.dtb |
Use the specific dtb file when booting Linux.
Note
You can change the baseboard variable in U-Boot to get the specific dtb loaded from eMMC.
EXAMPLE
setenv baseboard qsbase2-raspi-display-cam
Notice: 'fdt_file' changed from 'imx8mm-qs8m-mq00-qsbase2.dtb' to 'imx8mm-qs8m-mq00-qsbase2-raspi-display-cam.dtb'
Stream Camera¶
To stream a camera live video on your weston desktop follow the instructions written below.
| Module | Camera Stream |
|---|---|
| qs8m-mq00 | gst-launch-1.0 -v v4l2src ! "video/x-bayer,format=rggb,width=640,height=480,framerate=30/1" ! \
bayer2rgb ! videoconvert ! autovideosink sync=false
|
| qsxm-mm60, qsxp-ml81 | Start pylon viewer from serial Terminal: export DISPLAY=:0; pylon
Enable the camera and click on the camera icon to stream a live video. Live-stream the camera with gstreamer: gst-launch-1.0 -v v4l2src device=/dev/video2 ! waylandsink
You can also record the camera stream using the VPU: gst-launch-1.0 v4l2src device=/dev/video2 ! \
"video/x-raw, format=NV12, width=1920, height=1080, framerate=30/1" ! \
vpuenc_h264 ! mpegtsmux name=mux ! filesink location=test_1080.ts
|