The i.MX6 CPU video graphics subsystem contains one or two image processing units (IPU) which provide connectivity for cameras.
The i.MX6 Solo/DualLite CPU has one IPU that supports up to two video inputs:
The i.MX6 Dual/Quad has two IPUs that support up to three video inputs:
The ConnectCore 6 SBC has two parallel CSI connectors and one MIPI-CSI-2 connector.
Camera interfaces
Using the camera
Identify the camera
The default ConnectCore 6 SBC device tree defines two Video4Linux capture devices. Each one is assigned to a camera interface:
-
The MIPI camera is assigned video device node
/dev/video0
. -
The parallel camera is assigned video device node
/dev/video1
.
The following examples assume you are using the MIPI camera (/dev/video0 ).
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Preview a camera image using gstreamer
Capture the camera image and preview it using gstreamer:
# gst-launch-1.0 imxv4l2src device=/dev/video0 ! imxv4l2sink
Take a picture with the camera using gstreamer
Capture a still image with the camera and save it using gstreamer:
# gst-launch-1.0 imxv4l2src device=/dev/video0 num-buffers=1 ! jpegenc ! filesink location=sample.jpg
To show the captured image using gstreamer:
# gst-launch-1.0 filesrc location=sample.jpg ! jpegdec ! imagefreeze ! waylandsink
Record a video with the camera using gstreamer
Capture a moving image with the camera and save it using gstreamer:
# gst-launch-1.0 imxv4l2src device=/dev/video0 num-buffers=300 ! 'video/x-raw,format=(string)NV12,width=640,height=480,framerate=(fraction)30/1' ! queue ! vpuenc_h264 ! avimux ! filesink location=output.avi