Revision as of 14:43, 22 April 2021

DART-MX8M Camera

Testing MIPI-CSI2 cameras

Before running any of the pipelines below make sure you have camera(s) connected. i.MX family of processors uses gstreamer as multimedia framework. Please refer to https://gstreamer.freedesktop.org/

Camera Probe

Run the following command to see if you have the camera(s) detected

# v4l2-ctl --list-devices

This should produce the following output

# v4l2-ctl --list-devices
i.MX6S_CSI (platform:30a90000.csi1_bridge):
      /dev/video0

i.MX6S_CSI (platform:30b80000.csi2_bridge):
      /dev/video1

As you can see above there are 2 cameras accessible as /dev/video0 and /dev/video1

Testing Camera Preview on Display

In the examples below /dev/videoX is either /dev/video0 or /dev/video1

480P 640x480@30fps:

# gst-launch-1.0 v4l2src device=/dev/videox ! video/x-raw,width=640,height=480 ! autovideosink sync=false

NTSC 720x480@30fps:

# gst-launch-1.0 v4l2src device=/dev/videox ! video/x-raw,width=720,height=480 ! autovideosink sync=false

720P 1280x720@30fps:

# gst-launch-1.0 v4l2src device=/dev/videox ! video/x-raw,width=1280,height=720 ! autovideosink sync=false

1080P: 1920x1080@30fps:

# gst-launch-1.0 v4l2src device=/dev/videox ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false

QSXGA 2592x1944@15fps:

# gst-launch-1.0 v4l2src device=/dev/videox ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false

Testing Camera JPEG Snapshot

To capture JPEG snapshot run one of the pipelines below depending upon the required picture resolution.
In the examples below /dev/videoX is either /dev/video0 or /dev/video1

480P 640x480:

# gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=640,height=480   ! jpegenc ! filesink location=/tmp/test.jpg

NTSC 720x480:

# gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=720,height=480   ! jpegenc ! filesink location=/tmp/test.jpg

720P 1280x720:

# gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=1280,height=720  ! jpegenc ! filesink location=/tmp/test.jpg

1080P 1920x1080:

# gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=1920,height=1080 ! jpegenc ! filesink location=/tmp/test.jpg

QSXGA 2592x1944:

# gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=2592,height=1944 ! jpegenc ! filesink location=/tmp/test.jpg

Using both cameras simultaneously

The following pipeline is an example of using both cameras simultaneously.
In this example a short video stream from each camera is saved as an MJPEG-encoded AVI file.

# gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=100 ! video/x-raw,width=1920,height=1080 ! jpegenc ! avimux ! filesink location=./test0.avi \
                 v4l2src device=/dev/video1 num-buffers=100 ! video/x-raw,width=1920,height=1080 ! jpegenc ! avimux ! filesink location=./test1.avi

@@ Line 3: / Line 3: @@
 --> {{#lst:Yocto_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
 --> {{#lst:B2QT_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
+!-- Set local variables
+--> {{#vardefine:VIDEO_DEV | <!--
+-->    {{#switch:{{#var:HARDWARE_NAME}} | <!--
+-->       DART-MX8M = videox | <!--
+-->       DART-MX8M-PLUS = videox | <!--
+-->       video0 <!--
+-->    }} <!--
+--> }} <!--
+--> {{#vardefine:VIDEO_DEV_STR | <!--
+-->    {{#switch:{{#var:HARDWARE_NAME}} | <!--
+-->       DART-MX8M = In the examples below /dev/videoX is either /dev/video0 or /dev/video1 | <!--
+-->       DART-MX8M-PLUS = In the examples below /dev/videoX is either /dev/video1 or /dev/video2 | <!--
+-->         <!--
+-->    }} <!--
+--> }} <!--
 --> {{PageHeader|{{#var:HARDWARE_NAME}} Camera}} {{DocImage|category1=Yocto|category2={{#var:HARDWARE_NAME}}}} __toc__
 = Testing MIPI-CSI2 cameras =
@@ Line 52: / Line 67: @@
 {{#varexists:USE_KMSSINK |
-{{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M |
+{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8M-NANO |
-Cooming soon
-| {{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M-PLUS |
-Cooming soon
-| {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8M-NANO |
 * 1280x720@30fps:
   # gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=1280,height=720 ! kmssink sync=false can-scale=false
@@ Line 71: / Line 82: @@
 * 1920x1080@30fps:
   # gst-launch-1.0 v4l2src device=/dev/video0 ! imxvideoconvert_g2d ! video/x-raw,width=1920,height=1080 ! kmssink sync=false can-scale=false
-}}}}}}
+}}
 |
-{{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M |
-In the examples below /dev/videoX is either /dev/video0 or /dev/video1
-* 480P 640x480@30fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=640,height=480 ! autovideosink sync=false
-* NTSC 720x480@30fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=720,height=480 ! autovideosink sync=false
-* 720P 1280x720@30fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=1280,height=720 ! autovideosink sync=false
-* 1080P: 1920x1080@30fps:
+{{#var:VIDEO_DEV_STR}}
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false
-* QSXGA 2592x1944@15fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false
-| {{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M-PLUS |
-In the examples below /dev/videoX is either /dev/video1 or /dev/video2
-* 480P 640x480@30fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=640,height=480 ! autovideosink sync=false
-* NTSC 720x480@30fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=720,height=480 ! autovideosink sync=false
-* 720P 1280x720@30fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=1280,height=720 ! autovideosink sync=false
-* 1080P: 1920x1080@30fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false
-* QSXGA 2592x1944@15fps:
- # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false
-|
 * 480P 640x480@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=640,height=480 ! autovideosink sync=false
 * NTSC 720x480@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=720,height=480 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=720,height=480 ! autovideosink sync=false
 * 720P 1280x720@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=1280,height=720 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=1280,height=720 ! autovideosink sync=false
 * 1080P: 1920x1080@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false
 * QSXGA 2592x1944@15fps:
-  # gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false
-}}}}}}
+}}
 == Testing Camera JPEG Snapshot ==

DART-MX8M CSI: Difference between revisions