I have had a read LD is purley analogue apart from the sound carriers where they can be either CD sampling rate or analogue
Take a look at this before converting to VCD. VCD is a terrible format:
6.2 CD-I and VideoCD: The digital 5" CD-ROM -like laserdiscs
Philips claims CD-I to have a clean and sharp digital picture. Sure. The truth just happens to be that when a film is tried to cram in the same bandwidth that CDs use just for sound, the result is no good. Although the theoretical resolution of CD-I is somewhere around 320x256 pixels (240x256 lines), a transition from black to white can't happen in one pixel. This makes the real resolution look more like 200x180 pixels. This is even worse than VHS, which has a resolution of somewhere near 320x585 pixels (240x585 video lines) for PAL, or 320x482 pixels for NTSC.
When the images are not moving, CD-I appears to have a steady and non-noisy look. But when the picture has much movement, the very low picture data rate of 1.1 Mbits/s makes the picture break into little 8x8 and 16x16 pixel MPEG-1 -compression blocks, which makes any action film look totally disgusting. When you are supposed to be lost in high action, you are lost in compression blocks.
CD-I discs are claimed to be both NTSC and PAL compatible. This is carried out with an evil scheme: the discs are mastered in a way that makes everything appear 10% too flat on PAL TVs and 10% too tall on NTSC TVs. I find this way of solving problems to be totally unacceptable.
The video compression ratio on CD-I is approx. 40:1 and audio compression ratio is approx. 5:1.
