IMX CSI: Difference between revisions
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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 = | ||
== Camera Probe == | == Camera Probe == | ||
Make sure the camera is connected, and boot the board.<br> | |||
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> | ||
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