how does the original dvd being burned?

[esakal]

hello,

Thanks for all the replies.

I thought about something and guessed here will be a good place to ask.

I read in the forum that in order to maintain the original quality of DV movie, Each dvd disk (4.5 G) capable to store only 20 min of movie.

my question is, how does the original movies being burned. I know that they use larger disk (ie 8.5 G) but still, when using programs like DVDShrink and similer, we squeeze the movies to 4.5 and the quality is very good. the dvd holds around 1.2 hours of movie in good quality. how come?

Thanks a lot,

Eran.

[Video Dude]

You are confusing two different formats, DV and MPEG-2 (dvd).

You can fit about 21 minutes of DV video on a single layer dvd recordable. This approach is taken by many because recordable DVDs are a lot cheaper than DV tapes for storage. It is also easier to edit the video in the future since you don't have to play back the tape. It is 1:1 copy of the video on the DV tape.

DVDs use MPEG-2 compression, not DV. Because of the MPEG-2 compression you can fit 2 hours of good quality video or 10 hours of really bad quality video.

DVD recordables are not only used for DVD video but for data storage, which in this this case is DV.