> I am no expert here, but this sounds way too much GB, for a a PAL format as maximum > resolution.
They are NTSC format.
> 720x480 = 345,600 pixels x 3bytes (YUV) = 1.037 MB / frame
Laserdiscs don't have pixels, it's analogue & they are sampling exactly what is on disc. The decoding of the video into something that can be displayed is done by ld-decode from the huge files. By keeping the large files, they can improve the decoding without having to re-read the laser discs (which may have rotted in the mean time).
There is also quite a bit of data in each frame that isn't displayed.
> 4:4:4 sampling = ~112 GB / hour (uncompressed)
CAV Laser discs, necessary for interactive use, are limited to 30 minutes.
You can't 4:4:4 sample it, it's an undecoded wave form.
> Also FLAC is just a audio codec AFAIK, but it is true that this codec compress audio > with a 2:1 ratio.
How do you think FLAC can tell whether it's compressing audio or not? It's just taking a stream of numbers with certain characteristics. What he's telling you is that the huge dumps from the laser disc have the right characteristics for FLAC to compress.
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