2 for VCD, SVCD, or PAL DVD; ac3 is most commonly used for DVD. PCM audio may also be used for DVD, but this is mostly a big waste of space.... to 384 for SVCD; up to 1536 for DVD, but commonly used values range from 192 kbps for stereo to 384 kbps... r VCD; mpeg2video for SVCD; mpeg2video is usually used for DVD but you may also use mpeg1video for CIF resolutions.
* keyint: Used to set the GOP size. 18 for 30fps material, or 15
