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Originally Posted by dodo
I am relatively new here. See if u can help me out. I have a 750 mb .dat file i copied from a vcd. I want to write the same using a 700 mb media. A minor loss in quality is acceptable. What do i do. And what exactly is the diff btwn mpeg1 and .dat(vcd format). Is interconversion of them possible?
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Video CD uses mode 2 which means there is no error correcting data which takes up over 30% of the disk space so you can fit a lot more. But you need to use a program that uses mode 2 mode to write cd's. Nero VCD burn does do this automaticlaly as long as the DAT file is okay. DVD's on the other hand does not use this so you dont gain any additional space this way. You can store data this way too but it is dangerous since there is always errors on a CD. VCD format is specific in that it is 1150KBits/second data transfer rate with fixed screen sizes and audio. While MPEG1 can have any kind of data transfer rates ( I use like 3MB 3000KB at least to get better screens for video capture). You can also use DVD kind of screen resolutions. Since VCD screen sizes are smaller than a regular TV screen you also loose quality this way. By renaming .DAT to .MPG you have just converted your VCD data to MPEG1 data
SVCD is also similar to VCD except it uses MPEG2 formats.. You could technically convert your DVD format files to CD by doing this but it takes 4-6 CD's to store a single DVD and I used to do this to copy DVD's until I got money to buy a DVD burner. There are a number of chinese SVCD players since CD players are a lot cheaper than DVD players as you need to pay royalties for DVD lenses while you can pirate CD lenses.