someone was asking about making movies the other day

thought this might help

Norman

FGJpegHttpd Author

Begin forwarded message:

From: Cedric Pinson <[email protected]>
Date: February 1, 2010 6:14:05 PM EST
To: OpenSceneGraph Users <[email protected]>
Subject: Re: [osg-users] Rendering 2 video stream
Reply-To: [email protected], OpenSceneGraph Users <[email protected] >

Hi,
I render a video game based on osg into a video stream, you can have an
idea here http://plopbyte.net/?page_id=6/ you need a firefox plugin to
watch it.

The basic idea works on linux with gstreamer. Dont tested on windows but
because there is gstreamer, maybe it works too.

In the game code i added a thread that write image at a given rate. This
file is written into a file descriptor created with mkfifo.
Then i use a command line when the game is running:
gst-launch-0.10 filesrc location=myfifo ! videoparse width=800
height=600 format=15 framerate=20/1 ! ffmpegcolorspace ! videoscale !
video/x-raw-yuv, width=800, height=600 ! videoflip method=5 ! theoraenc
quality=40  ! oggmux ! gdppay ! tcpserversink port=12000 2>&1 >>log

The advantage using gstreamer is that you can use the codec you want to
encode the video and stream it over the web.

The code is inside this project http://hg.plopbyte.net/pokme/

Cheers,
Cedric

--
Provide OpenGL services around OpenSceneGraph and more
+33 659 598 614 Cedric Pinson mailto:[email protected]
http://www.plopbyte.net


On Mon, 2010-02-01 at 17:39 -0500, [email protected] wrote:
Adrian -
 A way that I've used for that type of functionality is through a
Camera::DrawCallback subclass. You can get the rendered scene through
an (osg::Image) readPixels() call and pass it out through whatever
stream you
like frame by frame.  It isn't extremely fast since it depends on the
readPixels() call, but on a Quadro or the like it has always been 'fast
enough' for my purposes.

 For the video stream output, I can't offer too much advice because I
have usually been happy to work with the raw frames, but you can pretty
much tie whatever you like at that point.

Rudy

On Mon, Feb 01, 2010 at 03:51:27PM +0100, Adrian Egli OpenSceneGraph (3D) wrote:
Hello all,

i am looking for a library or idea how we could render osg into a video
stream?

/adrian

--
********************************************
Adrian Egli

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