LG DVD-R 4.7GB/ 120 mins. 1-8X DVD Disc with 2:28.52 movie

[Gerald Sr.]

I was given a LG Dvd 4.7 GB 120 minutes 1-8x disc with a movie on it. The problem is the movie is 2:28.52 minutes long. I had checked the length of the movie with Nero. Nero stated that the capacity in use was 4,267mb, and it said Track 01: 4,369,248 Kb. I would like to know how was a movie 2:28.52 minutes fit on a Dvd that said LG 4.7 GB 120 minutes long. The dvd did not say dual layer on it.

Gerald Sr.

[classfour]

Not a dual layer.

Likely the difference in how Nero reads: 1000MB VS 1024MB per GB

There are other posts regarding this discrepancy.

DVDShrink sees a 4.7GB file as 4.38GB.

Same file, different posted sizes.

I'd guess Nero recode sees it as a 4.38GB file also, as it's based on Shrink.

In either case, if you wanted to back it up; you could rip in image mode with DVDDecryptor and burn it back to a single layer disc without problems.

[jman98]

First of all, DVDs are not anything like audio CDs. What I mean is that when you see an audio CD listed as holding 80 minutes of audio, it really means it holds 80 minutes. This is because of how audio data is stored on CDs. When a DVD says it holds "120 minutes" this is not a true measure of capacity. Video can be stored with variable bit rates (that means you can lower the bit rate to fit more video on the disc) whereas audio CD has a fixed bit rate that cannot be changed. Hence you can easily fit 3 hours, 4 hours, 6 hours or even more video on a single layer DVD. The "120 minutes" is just a suggestion, nothing more. Note that the lower your bit rate, the more video you can store, but the lower the quality. 120 minutes is the spot at which if you lower the bit rate to get more video on the disc, your quality may begin to suffer. It is relatively simple with the correct tools to get a 2 and a half hour movie on a single layer DVD. I have done so with captures from old laserdiscs with no problems. There is no magic going on - the bit rate is simply low enough to fit the film on the disc. If you use software encoding to make DVDs, you will understand how this is possible. If you use something like a DVD recorder to make DVDs, you will be isolated from the process and it will all seem like black magic to you, but what you are seeing is neither remarkable nor difficult to do.

[Gerald Sr.]

I placed the dvd in a player and the actual time was 2hrs. 37 mins., anyway, jman98 without lowering the bit rate to keep the good quality of the movie how can I put this movie on a regular dvd of 120 mins. I thank both of you for the information.

Gerald Sr.

[RowMan]

Don't be concerned about the disc capacity in terms of "time."

If the movie is already on a single layered disc, all you have to do is a standard copy to another disc on your computer (assuming you have a writable DVD drive). No shrinking or lowering of bitrate required.