Revision as of 12:29, 2 November 2020

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 24: / Line 24: @@
 </pre>
 As you can see above there are 2 cameras accessible as /dev/video0 and /dev/video1
+| {{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M-PLUS |
+<pre>
+ev ():
+        /dev/v4l-subdev0
+mxc-isi-cap (platform:32e00000.isi:cap_devic):
+        /dev/video1
+mxc-isi-m2m (platform:32e00000.isi:m2m_devic):
+        /dev/video0
+mxc-isi-cap (platform:32e02000.isi:cap_devic):
+        /dev/video2
+</pre>
+As you can see above there are 2 cameras accessible as /dev/video1 and /dev/video2
 |
 <pre>
@@ Line 31: / Line 46: @@
 </pre>
 As you can see above there is 1 camera accessible as /dev/video0
-}}
+}}}}
 == Testing Camera Preview on Display ==
@@ Line 37: / Line 52: @@
 {{#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:
+ # 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:
@@ Line 67: / Line 99: @@
 * QSXGA 2592x1944@15fps:
   # gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false
-}}
+}}}}
 == Testing Camera JPEG Snapshot ==
@@ Line 73: / Line 105: @@
 {{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M |
 <br>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
+| {{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M-PLUS |
+<br>In the examples below /dev/videoX is either /dev/video1 or /dev/video2
 * 480P 640x480:
@@ Line 103: / Line 152: @@
 * QSXGA 2592x1944:
   # gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=1 ! video/x-raw,width=2592,height=1944 ! jpegenc ! filesink location=/tmp/test.jpg
-}}
+}}}}
 {{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M |
 == Using both cameras simultaneously ==
@@ Line 112: / Line 161: @@
   # 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
+|{{#ifeq: {{#var:HARDWARE_NAME}} | DART-MX8M-PLUS |
+== Using both cameras simultaneously ==
+The following pipeline is an example of using both cameras simultaneously.<br>
+In this example a short video stream from each camera is saved as an H.264-encoded AVI file.
+ # gst-launch-1.0 v4l2src device=/dev/video1 num-buffers=100 ! video/x-raw,width=1920,height=1080 ! vpuenc_h264 ! avimux ! filesink location=./test0.avi \
+                  v4l2src device=/dev/video2 num-buffers=100 ! video/x-raw,width=1920,height=1080 ! vpuenc_h264 ! avimux ! filesink location=./test1.avi
 |
-}}
+}}}}

DART-MX8M CSI: Difference between revisions