Difference between revisions of "video 4 linux 2 notes"
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<pre> | <pre> | ||
gst-launch v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480,framerate=60/1' ! xvimagesink | gst-launch v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480,framerate=60/1' ! xvimagesink | ||
| + | </pre> | ||
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| + | == Capture video and modify settings at the same time == | ||
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| + | Start `guvcview` with the '''--control_only''' option to display a GUI dialog to edit camera settings. This will work while another video display or capture application is already running. | ||
| + | <pre> | ||
| + | guvcview --control_only --device=/dev/video0 | ||
</pre> | </pre> | ||
Revision as of 15:31, 10 June 2011
Contents
V4L2 -- Video For Linux Version Two
UVC
For a list of cameras that support UVC see the official Linux UVC site. Full UVC support in Linux:
I have been using a Logitech HD Pro Webcam C910, USB Device ID: 046d:0821, for my tests.
Gstreamer
Gstreamer is fast replacing all my other command-line tools for handling video.
1920x1080: This will have a low frame-rate since it will essentially max-out the USB bandwidth. It's useful for capturing individual frames without compression.
gst-launch v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=1920,height=1080' ! xvimagesink
This will capture at a higher framerate, but it will undersample the pixels so you will get an effective 320x240 resolution.
gst-launch v4l2src device=/dev/video0 ! 'video/x-raw-yuv,width=640,height=480,framerate=60/1' ! xvimagesink
Capture video and modify settings at the same time
Start `guvcview` with the --control_only option to display a GUI dialog to edit camera settings. This will work while another video display or capture application is already running.
guvcview --control_only --device=/dev/video0
