Screen presenter application in an RTP stream using JMF - very slow..

I am trying to build a screen presenter application using JMF. I got the AVTransmit2 code to run with the Screen grabber data source. I use the following calls
java AVTransmit2 screen://0,0,160,120/10 224.122.122.122 2222
- java AVReceive2 224.122.122.122/2222
The AVReceive does receive the screen data stream in RTP, but either there are too many artifacts(h263) or it is too slow(JPEG format). Is there a way to optimize the screen grabber data source or the encoding somehow to make this more efficient?

ucla_jatt wrote:
The AVReceive does receive the screen data stream in RTP, but either there are too many artifacts(h263) or it is too slow(JPEG format). Is there a way to optimize the screen grabber data source or the encoding somehow to make this more efficient?It's not really a question of efficiency, most likely.
You're probably trying to broadcast a very, very high resolution video (your screen is probably a minimum of 1024x768) at a very, very high framerate (30 fps, I'd bet).
A DVD runs at 640x480 at around 30 frames per second.
You're trying to broadcast a video feed with over two and a half times as much visual information as a DVD has, and that's before you throw in that a DVD is encoded using MPEG4 compression.
In the end, you're probably trying to broadcast 754,974,720 bits per second (1024x768x32(bit color)x30(fps)), or roughly trying to dump 1 CD-RWs worth of data to your network card per second...
You want it to work well, you're going to need to decrease both the framerate and transcode the full-size video down into a smaller size...
Or you can go into the DataSource code and modify the resolution of the screen capture image before it's compiled into the video. That would also work.

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