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AOM-DB3500 Video In(MIPI CSI0/CSI1)——Camera

Contents​

  • 1Camera
  • 2
  • 3View Resolution
  • 4Set Resolution
  • 5Preview Camera
  • 6Camera Photography
  • 7Camera Screen Recording

Camera​

AOM-3821 has two MIPI-CSI camera ports.

Peripheral: ROM-EC50 + CRK8F4403-V1 (IMX415) Cable: 39-pin 0.3mm pitch, unidirectional FPC. The USB on ROM-EC50 requires external 5V power supply to ensure the camera's voltage level.

MIPI-CSI camera ports
Camera Number
Camera1
Camera2

View Resolution​

Taking port 22 as an example, you can enter the following instructions to view information such as the resolution, pixel format, Field, Number of planes, Flags, Colorspace, Transfer Function, YCbCr/HSV Encoding, Quantization, Bytes per Line and Size Image.

# v4l2-ctl -d /dev/video22 --get-fmt-video
Format Video Capture Multiplanar:
 Width/Height : 3840/2160
 Pixel Format : 'NV12' (Y/UV 4:2:0)
 Field : None
 Number of planes : 1
 Flags :
 Colorspace : sRGB
 Transfer Function : Rec. 709
 YCbCr/HSV Encoding: Rec. 709
 Quantization : Full Range
 Plane 0 :
 Bytes per Line : 3840
 Size Image : 12441600 

Set Resolution​

Taking port 22 as an example, you can enter the following commands to set the resolution to 1920*1080.

# v4l2-ctl -d /dev/video22 --set-fmt-video=width=1920,height=1080,\pixelformat='NV12'

Preview Camera​

Taking port 22 as an example, you can set the preview of the camera video by using the following command.

# export DISPLAY=:0.0
# export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib/aarch64-linux-gnu/
gstreamer-1.0
#gst-launch-1.0 v4l2src device=/dev/video22 \! video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1 \! xvimagesink

Camera Photography​

Taking port 22 as an example, the following command can be used to take a camera photo, and the save address is picture.jpg in the current directory.

# gst-launch-1.0 v4l2src device=/dev/video22 num-buffers=1 \
! video/x-raw,format=NV12,width=1920,height=1080 ! jpegenc ! filesink location= picture.jpg

Camera Screen Recording​

Taking port 22 as an example, the following command can be used to record videos with the camera, and the save address is video.mp4 in the current directory.

# gst-launch-1.0 -e \
v4l2src device=/dev/video22 \
! video/x-raw,format=NV12,width=1920,height=1080,framerate=25/1 \
! videoconvert \
! x264enc bitrate=5000 speed-preset=ultrafast tune=zerolatency \
! h264parse \
! mp4mux \
! filesink location= video.mp4