Programming the camera: Difference between revisions
(Getting started with the camera (plus inprogress notes)) |
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gst-launch-0.10 v4l2src ! ffmpegcolorspace ! pngenc ! filesink location=foo.png |
gst-launch-0.10 v4l2src ! ffmpegcolorspace ! pngenc ! filesink location=foo.png |
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You'll need to run the above command in either a terminal in the developer console or one of the virtual terminals (e.g. <tt>ctrl-alt-f1</tt>). Note this means you don't need the Sugar GUI to be running to access the camera. |
You'll need to run the above command in either a terminal in the developer console (<tt>alt-=</tt>) or one of the virtual terminals (e.g. <tt>ctrl-alt-f1</tt>). Note this means you don't need the Sugar GUI to be running to access the camera. |
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You can view the PNG image created as a result of the command in the Web activity. |
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Now, let's try and get some video on the screen: |
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gst-launch-0.10 v4l2src ! ximagesink |
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===== Camera ===== |
===== Camera ===== |
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* Have to script v4l2 via gstreamer to capture a single frame from the camera. See sugar/shell/intro/glive.py for sample code |
* Have to script v4l2 via gstreamer to capture a single frame from the camera. See sugar/shell/intro/glive.py for sample code |
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* Try this from the command line: <tt>gst-launch-0.10 v4l2src ! ffmpegcolorspace ! pngenc ! filesink location=foo.png</tt> |
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===== Camera-as-video-camera (v4l2?) ===== |
===== Camera-as-video-camera (v4l2?) ===== |
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* Is a regular v4l2 device available via gstreamer (gst module) |
* Is a regular v4l2 device available via gstreamer (gst module) |
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Revision as of 15:20, 13 April 2007
This page explores how to interact with the laptop's built-in video camera.
Getting started
First, let's see the quickest way we can capture a still image from the camera--using a GStreamer command-line tool:
gst-launch-0.10 v4l2src ! ffmpegcolorspace ! pngenc ! filesink location=foo.png
You'll need to run the above command in either a terminal in the developer console (alt-=) or one of the virtual terminals (e.g. ctrl-alt-f1). Note this means you don't need the Sugar GUI to be running to access the camera.
You can view the PNG image created as a result of the command in the Web activity.
Now, let's try and get some video on the screen:
gst-launch-0.10 v4l2src ! ximagesink
Unlike the first command this command will only work when executed in a terminal in the developer console. The resulting video will appear behind the developer console window so you'll need to move the developer console window aside to see the video.
Camera
- Have to script v4l2 via gstreamer to capture a single frame from the camera. See sugar/shell/intro/glive.py for sample code
Camera-as-video-camera (v4l2?)
- Is a regular v4l2 device available via gstreamer (gst module)