Revision as of 18:58, 21 January 2025

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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

In the example above, you can see there are 2 cameras accessible as /dev/video0 and /dev/video1

Testing Camera Preview on Display

In the examples below, replace /dev/videoX with an actual camera device, following the Camera Probe section.

VGA 480p 640x480@30fps:

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

NTSC 480p 720x480@30fps:

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

HD 720p 1280x720@30fps:

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

Full HD 1080p 1920x1080@30fps:

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

QSXGA 1944p 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, replace /dev/videoX with an actual camera device, following the Camera Probe section.

VGA 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_640x480.jpg

NTSC 480p 720x480:

# gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=720,height=480 ! jpegenc ! filesink location=/tmp/test_720x480.jpg

HD 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_1280x720.jpg

Full HD 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_1920x1080.jpg

QSXGA 1944p 2592x1944:

# gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=2592,height=1944 ! jpegenc ! filesink location=/tmp/test_2592x1944.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 4: / Line 4: @@
 --> {{#lst:B2QT_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
 --> {{#lst:Debian_Platform_Customization|{{#var:RELEASE_PARAM}}}} <!--
-!-- Set local variables
---> {{#vardefine:VIDEO_DEV | <!--
--->    {{#switch:{{#var:HARDWARE_NAME}} | <!--
--->       DART-MX8M = videoX | <!--
--->       DART-MX8M-PLUS = videoX | <!--
--->       VAR-SOM-MX8 = 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 | <!--
--->       VAR-SOM-MX8 = In the examples below /dev/videoX is either /dev/video0 or /dev/video1 | <!--
--->         <!--
--->    }} <!--
---> }} <!--
 --> {{PageHeader|{{#var:HARDWARE_NAME}} Camera}} {{DocImage|category1=Yocto|category2=Debian}} [[Category:{{#var:HARDWARE_NAME}}]] __toc__
 = Testing MIPI-CSI2 cameras =
@@ Line 48: / Line 31: @@
        /dev/video1
 </pre>
-As you can see above there are 2 cameras accessible as /dev/video0 and /dev/video1
+In the example above, you can see there are 2 cameras accessible as /dev/video0 and /dev/video1
 | {{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M-PLUS |
 <pre>
@@ Line 63: / Line 46: @@
          /dev/video2
 </pre>
-As you can see above there are 2 cameras accessible as /dev/video1 and /dev/video2
+In the example above, you can see there are 2 cameras accessible as /dev/video1 and /dev/video2
 | {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX93 |
 <pre>
@@ Line 73: / Line 56: @@
 	/dev/video0
 </pre>
-As you can see above there is 1 camera accessible as /dev/video0
+In the example above, you can see there is 1 camera accessible as /dev/video0
 |
 <pre>
@@ Line 80: / Line 63: @@
        /dev/video0
 </pre>
-As you can see above there is 1 camera accessible as /dev/video0
+In the example above, you can see there is 1 camera accessible as /dev/video0
 }}}}}}
 == Testing Camera Preview on Display ==
-{{#var:VIDEO_DEV_STR}}
+In the examples below, replace /dev/videoX with an actual camera device, following the [[#Camera_Probe | Camera Probe]] section.
 {{#varexists:USE_KMSSINK |
 {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8M-NANO |
 * HD 720p 1280x720@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=1280,height=720 ! kmssink sync=false can-scale=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=1280,height=720 ! kmssink sync=false can-scale=false
 * Full HD 1080p 1920x1080@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=1920,height=1080 ! kmssink sync=false can-scale=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=1920,height=1080 ! kmssink sync=false can-scale=false
 |
 * NTSC 480p 720x480@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! imxvideoconvert_g2d ! video/x-raw,width=720,height=480 ! kmssink sync=false can-scale=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! imxvideoconvert_g2d ! video/x-raw,width=720,height=480 ! kmssink sync=false can-scale=false
 * HD 720p 1280x720@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! imxvideoconvert_g2d ! video/x-raw,width=1280,height=720 ! kmssink sync=false can-scale=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! imxvideoconvert_g2d ! video/x-raw,width=1280,height=720 ! kmssink sync=false can-scale=false
 * Full HD 1080p 1920x1080@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! imxvideoconvert_g2d ! video/x-raw,width=1920,height=1080 ! kmssink sync=false can-scale=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! imxvideoconvert_g2d ! video/x-raw,width=1920,height=1080 ! kmssink sync=false can-scale=false
 }}
 |
 * VGA 480p 640x480@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=640,height=480 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=640,height=480 ! autovideosink sync=false
 * NTSC 480p 720x480@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=720,height=480 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=720,height=480 ! autovideosink sync=false
 * HD 720p 1280x720@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=1280,height=720 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=1280,height=720 ! autovideosink sync=false
 * Full HD 1080p 1920x1080@30fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false
 {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8M-NANO ||{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX93 ||
 * QSXGA 1944p 2592x1944@15fps:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false
+  # gst-launch-1.0 v4l2src device=/dev/videoX ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false
 }}}}}}
@@ Line 124: / Line 107: @@
 To capture JPEG snapshot run one of the pipelines below depending upon the required picture resolution.
-{{#var:VIDEO_DEV_STR}}
+In the examples below, replace /dev/videoX with an actual camera device, following the [[#Camera_Probe | Camera Probe]] section.
 * VGA 480p 640x480:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} num-buffers=1 ! video/x-raw,width=640,height=480 ! jpegenc ! filesink location=/tmp/test_640x480.jpg
+  # gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=640,height=480 ! jpegenc ! filesink location=/tmp/test_640x480.jpg
 * NTSC 480p 720x480:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} num-buffers=1 ! video/x-raw,width=720,height=480 ! jpegenc ! filesink location=/tmp/test_720x480.jpg
+  # gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=720,height=480 ! jpegenc ! filesink location=/tmp/test_720x480.jpg
 * HD 720p 1280x720:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} num-buffers=1 ! video/x-raw,width=1280,height=720 ! jpegenc ! filesink location=/tmp/test_1280x720.jpg
+  # gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=1280,height=720 ! jpegenc ! filesink location=/tmp/test_1280x720.jpg
 * Full HD 1080p 1920x1080:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} num-buffers=1 ! video/x-raw,width=1920,height=1080 ! jpegenc ! filesink location=/tmp/test_1920x1080.jpg
+  # gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=1920,height=1080 ! jpegenc ! filesink location=/tmp/test_1920x1080.jpg
 {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8M-NANO ||{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX93 ||
 * QSXGA 1944p 2592x1944:
-  # gst-launch-1.0 v4l2src device=/dev/{{#var:VIDEO_DEV}} num-buffers=1 ! video/x-raw,width=2592,height=1944 ! jpegenc ! filesink location=/tmp/test_2592x1944.jpg
+  # gst-launch-1.0 v4l2src device=/dev/videoX num-buffers=1 ! video/x-raw,width=2592,height=1944 ! jpegenc ! filesink location=/tmp/test_2592x1944.jpg
 }}}}

DART-MX8M CSI: Difference between revisions