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Edge2 MIPI Camera Usage
Linux
Edge2 CAM3 support 4K@60fps record. If your hardware version is V13, the CAM2 also can support 4K@60fps record.
Check Hardware Version
$ cat /proc/cmdline
V13 will show like hwver=EDGE2.V13
Due to the different hardware versions, CAM2 is set to 4K@30fps by default. This is for compatibility with non-V13 hardware versions to ensure proper operation. If your device supports 4K@60fps, you can enable this mode by adding an overlay file.
$ sudo vi /boot/dtb/rockchip/rk3588s-khadas-edge2.dtb.overlay.env fdt_overlays=cam2-4lane
Upgrade System
Please follow the documentation to upgrade your system to latest version.
Video Node
You can find the video nodes from the table below.
| Video Node(5.10.66) | Video Node(5.10.160 and later) | |
|---|---|---|
| CAM1 | /dev/video33 | /dev/video42 |
| CAM2 | /dev/video24 | /dev/video33 |
| CAM3 | /dev/video42 | /dev/video51 |
Record Video with Gstreamer
kernel 5.10.66
Record video from CAM1:
gst-launch-1.0 v4l2src device=/dev/video33 io-mode=dmabuf num-buffers=300 ! mpph264enc ! h264parse ! qtmux ! filesink location=/tmp/video33.mp4
Record video from CAM2:
gst-launch-1.0 v4l2src device=/dev/video24 io-mode=dmabuf num-buffers=300 ! mpph264enc ! h264parse ! qtmux ! filesink location=/tmp/video24.mp4
Record video from CAM3:
gst-launch-1.0 v4l2src device=/dev/video42 io-mode=dmabuf num-buffers=300 ! mpph264enc ! h264parse ! qtmux ! filesink location=/tmp/video42.mp4
Other version
Record video from CAM1:
gst-launch-1.0 v4l2src device=/dev/video42 io-mode=dmabuf num-buffers=300 ! video/x-raw,format=NV12,width=3840,height=2160,framerate=30/1 ! mpph264enc ! h264parse ! qtmux ! filesink location=/tmp/video42.mp4
Record video from CAM2:
gst-launch-1.0 v4l2src device=/dev/video33 io-mode=dmabuf num-buffers=300 ! video/x-raw,format=NV12,width=3840,height=2160,framerate=30/1 ! mpph264enc ! h264parse ! qtmux ! filesink location=/tmp/video33.mp4
For 4K@60fps, framerate should be set 60/1
Record video from CAM3:
gst-launch-1.0 v4l2src device=/dev/video51 io-mode=dmabuf num-buffers=600 ! video/x-raw,format=NV12,width=3840,height=2160,framerate=60/1 ! mpph264enc ! h264parse ! qtmux ! filesink location=/tmp/video51.mp4
Capture Frame with V4L2 Utils
Follow the steps below to install v4l-utils:
sudo apt update sudo apt install v4l-utils
kernel 5.10.66
Capture frame from CAM1:
v4l2-ctl -d /dev/video33 --set-fmt-video=width=3840,height=2160,pixelformat=NV12 --stream-mmap=3 --stream-skip=3 --stream-to=/tmp/data33.yuv --stream-count=1 --stream-poll
Capture frame from CAM2:
v4l2-ctl -d /dev/video24 --set-fmt-video=width=3840,height=2160,pixelformat=NV12 --stream-mmap=3 --stream-skip=3 --stream-to=/tmp/data24.yuv --stream-count=1 --stream-poll
Capture frame from CAM3:
v4l2-ctl -d /dev/video42 --set-fmt-video=width=3840,height=2160,pixelformat=NV12 --stream-mmap=3 --stream-skip=3 --stream-to=/tmp/data42.yuv --stream-count=1 --stream-poll
Other version
Capture frame from CAM1:
v4l2-ctl -d /dev/video42 --set-fmt-video=width=3840,height=2160,pixelformat=NV12 --stream-mmap=3 --stream-skip=3 --stream-to=/tmp/data42.yuv --stream-count=1 --stream-poll
Capture frame from CAM2:
v4l2-ctl -d /dev/video33 --set-fmt-video=width=3840,height=2160,pixelformat=NV12 --stream-mmap=3 --stream-skip=3 --stream-to=/tmp/data33.yuv --stream-count=1 --stream-poll
Capture frame from CAM3:
v4l2-ctl -d /dev/video51 --set-fmt-video=width=3840,height=2160,pixelformat=NV12 --stream-mmap=3 --stream-skip=3 --stream-to=/tmp/data51.yuv --stream-count=1 --stream-poll
It will capture a 3840×2160 NV12 format frame to file /tmp/dataXX.yuv.
Preview the file:
$ ffplay -f rawvideo -pixel_format nv12 -video_size 3840x2160 /tmp/dataXX.yuv
Android
