How can I get the best quality movie playback in ShowMacster?
Try to provide “friendly” movie stuff to ShowMacster (and to your CPU): As a starting point: Movies with a size of max. 320×240, 5-10 fps and a codec like “Motion JPEG” (the AVI files most digital still camaras deliver) should work fine. Play around with different parameters (codecs, sizes…). Use “QuickTime Player” to export different formats if you have access to QuicktimePro, otherwise it should be possible to recompress movies with iMovie (“Share… > Quicktime > Compress movie for: Expert Settings”). Remember, that iChat will transmit the video stream with a resolution of only 176×144 pixels and something like 5 to 15 frames per second. So providing a movie in 640×480 fullscreen resolution with 30 fps may be possible, but doesn’t result in better or more fluid video on the other end of the line.