MX8 CSI: Difference between revisions
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{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8X | = Testing MIPI-CSI2 and parallel CSI cameras = | = Testing MIPI-CSI2 cameras =}} | {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8X | = Testing MIPI-CSI2 and parallel CSI cameras = | = Testing MIPI-CSI2 cameras =}} | ||
Make sure you have the camera(s) connected to the board before booting it and running any of the pipelines below .<br> | |||
Please refer to https://gstreamer.freedesktop.org/ | The i.MX family of SOCs uses gstreamer as a multimedia framework. Please refer to https://gstreamer.freedesktop.org/ | ||
== Camera Probe == | == Camera Probe == | ||
Run the following command to | Run the following command to list the detected camera devices | ||
# v4l2-ctl --list-devices | # v4l2-ctl --list-devices | ||
| Line 34: | Line 34: | ||
/dev/video4 | /dev/video4 | ||
</pre> | </pre> | ||
There are 2 cameras accessible as /dev/video0 and /dev/video1. The first one is MIPI-CSI2 camera attached to VAR-EXT-CB8 expansion board, the second one is parallel CSI camera attached to VCAM-5640P expansion board. | There are 2 cameras accessible as /dev/video0 and /dev/video1. The first one is a MIPI-CSI2 camera attached to the VAR-EXT-CB8 expansion board, the second one is a parallel CSI camera attached to the VCAM-5640P expansion board. | ||
| | | | ||
On VAR-SOM-MX8 it should produce the following output | On VAR-SOM-MX8 it should produce the following output | ||
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/dev/video3 | /dev/video3 | ||
</pre> | </pre> | ||
There is | There is one camera accessible as /dev/video0, attached to the VAR-EXT-CB8 expansion board. | ||
<br>On SPEAR-MX8 this should produce the following output: | <br> | ||
On SPEAR-MX8 this should produce the following output: | |||
<pre> | <pre> | ||
# v4l2-ctl --list-devices | # v4l2-ctl --list-devices | ||
| Line 75: | Line 76: | ||
/dev/video4 | /dev/video4 | ||
</pre> | </pre> | ||
There | There are two cameras accessible as /dev/video0 and /dev/video1, both attached to the VAR-EXT-CB8 expansion board. | ||
}} | }} | ||
| Line 82: | Line 83: | ||
In the examples below /dev/video1 can be used instead of /dev/video0 on boards with 2 cameras. | In the examples below /dev/video1 can be used instead of /dev/video0 on boards with 2 cameras. | ||
* | * 480p (640x480): | ||
# 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/video0 ! video/x-raw,width=640,height=480 ! autovideosink sync=false | ||
* NTSC 720x480: | * NTSC (720x480): | ||
# 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/video0 ! video/x-raw,width=720,height=480 ! autovideosink sync=false | ||
* | * 720p (1280x720): | ||
# 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/video0 ! video/x-raw,width=1280,height=720 ! autovideosink sync=false | ||
* | * 1080p (1920x1080): | ||
# 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/video0 ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false | ||
* QSXGA 2592x1944: | * QSXGA (2592x1944): | ||
# 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/video0 ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false | ||
{{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8X | | {{#ifeq: {{#var:HARDWARE_NAME}} | VAR-SOM-MX8X | | ||
{{note|Note: | {{note|Note: The parallel camera interface maximal framerate at the 1920x1080 and 2592x1944 resolutions is 7.5fps|info}} | ||
}} | }} | ||
== Testing Camera JPEG Snapshot == | == Testing Camera JPEG Snapshot == | ||
To capture JPEG snapshot run one of the pipelines below depending upon the required picture resolution. | To capture a JPEG snapshot run one of the pipelines below, depending upon the required picture resolution.<br> | ||
In the examples below /dev/video1 can be used instead of /dev/video0 on boards with 2 cameras. | |||
* 480p (640x480): | |||
* | |||
# gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=1 ! video/x-raw,width=640,height=480 ! jpegenc ! filesink location=/tmp/test.jpg | # gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=1 ! video/x-raw,width=640,height=480 ! jpegenc ! filesink location=/tmp/test.jpg | ||
* NTSC 720x480: | * NTSC (720x480): | ||
# gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=1 ! video/x-raw,width=720,height=480 ! jpegenc ! filesink location=/tmp/test.jpg | # gst-launch-1.0 v4l2src device=/dev/video0 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/video0 num-buffers=1 ! video/x-raw,width=1280,height=720 ! jpegenc ! filesink location=/tmp/test.jpg | # gst-launch-1.0 v4l2src device=/dev/video0 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/video0 num-buffers=1 ! video/x-raw,width=1920,height=1080 ! jpegenc ! filesink location=/tmp/test.jpg | # gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=1 ! video/x-raw,width=1920,height=1080 ! jpegenc ! filesink location=/tmp/test.jpg | ||
* QSXGA 2592x1944: | * 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 | # gst-launch-1.0 v4l2src device=/dev/video0 num-buffers=1 ! video/x-raw,width=2592,height=1944 ! jpegenc ! filesink location=/tmp/test.jpg | ||
Revision as of 13:33, 11 November 2019
Camera
Testing MIPI-CSI2 cameras
Make sure you have the camera(s) connected to the board before booting it and running any of the pipelines below .
The i.MX family of SOCs uses gstreamer as a multimedia framework. Please refer to https://gstreamer.freedesktop.org/
Camera Probe
Run the following command to list the detected camera devices
# v4l2-ctl --list-devices
On VAR-SOM-MX8 it should produce the following output
# v4l2-ctl --list-devices
vpu B0 (platform:):
/dev/video12
/dev/video13
mxc-isi (platform:58100000.isi.0):
/dev/video0
/dev/video1
mxc-jpeg decoder (platform:58400000.jpegdec):
/dev/video2
mxc-jpeg decoder (platform:58450000.jpegenc):
/dev/video3
There is one camera accessible as /dev/video0, attached to the VAR-EXT-CB8 expansion board.
On SPEAR-MX8 this should produce the following output:
# v4l2-ctl --list-devices
vpu B0 (platform:):
/dev/video12
/dev/video13
mxc-isi (platform:58100000.isi.0):
/dev/video0
/dev/video2
mxc-isi (platform:58140000.isi.4):
/dev/video1
mxc-jpeg decoder (platform:58400000.jpegdec):
/dev/video3
mxc-jpeg decoder (platform:58450000.jpegenc):
/dev/video4
There are two cameras accessible as /dev/video0 and /dev/video1, both attached to the VAR-EXT-CB8 expansion board.
Testing Camera Preview on Display
In the examples below /dev/video1 can be used instead of /dev/video0 on boards with 2 cameras.
- 480p (640x480):
# gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480 ! autovideosink sync=false
- NTSC (720x480):
# gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=720,height=480 ! autovideosink sync=false
- 720p (1280x720):
# gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=1280,height=720 ! autovideosink sync=false
- 1080p (1920x1080):
# gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=1920,height=1080 ! autovideosink sync=false
- QSXGA (2592x1944):
# gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=2592,height=1944 ! autovideosink sync=false
Testing Camera JPEG Snapshot
To capture a JPEG snapshot run one of the pipelines below, depending upon the required picture resolution.
In the examples below /dev/video1 can be used instead of /dev/video0 on boards with 2 cameras.
- 480p (640x480):
# gst-launch-1.0 v4l2src device=/dev/video0 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/video0 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/video0 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/video0 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/video0 num-buffers=1 ! video/x-raw,width=2592,height=1944 ! jpegenc ! filesink location=/tmp/test.jpg
Using 2 cameras simultaneously
The following pipeline is an example of using 2 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