Hi Gianni,
like Sergey said, you could try an application external to your own. On
Linux we've also used "istanbul" and ffmpeg [1] before.
If you want to read pixels back you can use one of the approaches in
osgscreencapture. We've experimented with this in a small image
processing framework we have. See the screen_capture_producer and
screen_capture examples here:
http://code.google.com/p/flitr/
It basically attaches (a producer) to an osg::View as a final draw
callback and reads data into a memory buffer. A consumer then streams
this data to disk in another thread. One is obviously limited by either
GPU->CPU speed, mem size or (more likely) disk speed.
cheers
jp
[1] e.g. ffmpeg -f x11grab -r 20 -s 768x768 -i :0.0+4,52 -an -vcodec
mjpeg ...
On 12/05/11 16:42, Sergey Polischuk wrote:
Hi, Gianni
In linux you can use glc for grabbing video from opengl render in realtime.
osgscreencapture-like screen capture takes a lot of time each frame and would
be slow as hell in good resolutions (you can speedup it to some point by
writing to drive created in ram).
11.05.2011, 12:17, "Gianni Ambrosio"<[email protected]>:
Hi All,
I know this topic have been already discussed in the past but I didn't find
clear solution.
Basically I need to save a movie of what is shown in an osgViewer embedded in a
Qt widget.
I gave a rough look at the osgscreencapture example. Is the recommended way to
implement what I need?
Regards
Gianni
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