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{{PageHeader|VAR-SOM-MX7 - Camera}} {{DocImage|category1=VAR-SOM-MX7|category2=Yocto}} __toc__
{{PageHeader|VAR-SOM-MX7 - Camera}} {{DocImage|category1=VAR-SOM-MX7|category2=Yocto}} __toc__
= Testing our MIPI cameras =
= Testing our MIPI cameras =
Before you start any of below pipeline make sure you have camera connected. IMX family of processor uses gstreamer as multimedia framework.
Please refer to https://gstreamer.freedesktop.org/


== Camera Probe ==
== Camera Probe ==
 
Make sure the camera is connected, and boot the board.<br>
Run below command to see if you have got the camera detected
Then, run the below command to verify the camera was detected successfully:
  # v4l2-ctl --list-devices
  # v4l2-ctl --list-devices


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</pre>
</pre>
As you can see above i.MX6S_CSI (platform:30710000.csi): is camera and pxp (pxp_v4l2_out): pixel procesing engine for overlay on display
In the output seen above, "i.MX6S_CSI" is the camera, and "pxp" is the i.MX Pixel Processing Pipeline.


== i.MX platform specific gstreamer plugins ==
== i.MX platform specific gstreamer plugins ==
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* For 2592x1944:
* For 2592x1944:
  # gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=4 num-buffers=1 ! jpegenc ! filesink location=/tmp/test.jpg
  # gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=4 num-buffers=1 ! jpegenc ! filesink location=/tmp/test.jpg
= References =
* The GStreamer [https://gstreamer.freedesktop.org/ website]
* The gstreamer-imx [https://github.com/Freescale/gstreamer-imx/blob/master/README.md README]
* The gstreamer-imx [https://github.com/Freescale/gstreamer-imx/blob/master/docs/faq.md FAQ]

Revision as of 12:26, 5 October 2018

VAR-SOM-MX7 - Camera

Testing our MIPI cameras

Camera Probe

Make sure the camera is connected, and boot the board.
Then, run the below command to verify the camera was detected successfully:

# v4l2-ctl --list-devices

This should output below

i.MX6S_CSI (platform:30710000.csi):
        /dev/video1

pxp (pxp_v4l2_out):
        /dev/video0

In the output seen above, "i.MX6S_CSI" is the camera, and "pxp" is the i.MX Pixel Processing Pipeline.

i.MX platform specific gstreamer plugins

Run below command to verify you have the i.MX7 platform specific gstreamer plugins installed on your system:

# gst-inspect-1.0  | grep "imx"
imxpxp:  imxpxpvideotransform: Freescale PxP video transform
imxpxp:  imxpxpvideosink: Freescale PxP video sink
imxv4l2videosrc:  imxv4l2videosrc: V4L2 CSI Video Source
imxaudio:  imxmp3audioenc: Freescale i.MX MP3 encoder
imxaudio:  imxuniaudiodec: Freescale i.MX uniaudio decoder

Gstreamer example 1: Testing Camera Loopback / Camera preview on the display

The below pipelines are suitable for the fslc based Yocto releases for the VAR-SOM-MX7 (Yocto Morty and newer).

  • For 640x480@30fps:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=0 ! imxpxpvideosink
  • For 720x480@30fps:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=1 ! imxpxpvideosink
  • For 1280x720@30fps :
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=2 ! imxpxpvideosink
  • For 1920x1080@30fps:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=3 ! imxpxpvideosink
  • For 2592x1944@15fps:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=4 ! imxpxpvideosink

Gstreamer example 2: Taking a JPEG snapshot from the camera

To capture and encode a JPEG snapshot from the camera, run one of the below pipelines depending on the wanted resolution:

  • For 640x480:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=0 num-buffers=1 ! jpegenc ! filesink location=/tmp/test.jpg
  • For 720x480:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=1 num-buffers=1 ! jpegenc ! filesink location=/tmp/test.jpg
  • For 1280x720:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=2 num-buffers=1 ! jpegenc ! filesink location=/tmp/test.jpg
  • For 1920x1080:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=3 num-buffers=1 ! jpegenc ! filesink location=/tmp/test.jpg
  • For 2592x1944:
# gst-launch-1.0 imxv4l2videosrc device=/dev/video1  imx-capture-mode=4 num-buffers=1 ! jpegenc ! filesink location=/tmp/test.jpg

References