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:

dwg ipu1

The i.MX6 Dual/Quad has two IPUs that support up to three video inputs:

dwg ipu2

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).

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