IMX CSI: Difference between revisions
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== Testing Camera Loopback / Camera | == 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). | The below pipelines are suitable for the fslc based Yocto releases for the VAR-SOM-MX7 (Yocto Morty and newer). |
Revision as of 12:03, 5 October 2018
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
Run below command to see if you have got the camera detected
# v4l2-ctl --list-devices
This should output below
i.MX6S_CSI (platform:30710000.csi): /dev/video1 pxp (pxp_v4l2_out): /dev/video0
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
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
Example: 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