Media Size discrepancy, why?

archpage wrote on 2/28/2005, 3:39 AM
HI,
I'm having problemswith DVDA 2.0 not recognising the correct size of media files.

After inserting a 4.2GB mpeg-2 file (rendered with Main concept,1.5hr Video only) DVDA says it has 5.6 GB Disk spaced used. (where did the extra 1.4GB come from ?)

So now it is too big for a single 4.7GB disc.
Does any one know how i fix this or get around this problem. I rather not compress my already poor quality home video to a smaller mpeg-2 size

Arch

Comments

bStro wrote on 2/28/2005, 7:02 AM
Does any one know how i fix this or get around this problem.

Yep. Call DVDA a bloody liar. Then go ahead and prepare your DVD files.

Ignore DVDA's estimate -- it's wrong. Always is. Someone here has explained what DVDA is doing wrong, I think, but I don't remember what it is.

Go to File -> Optimize DVD and make sure that it's not going to re-compress your files. If it is, they're not DVD compliant (according to DVDA), and you should go back and do them again. If it's not, and if you know that your total project should fit on a disc, then it probably will. Click Make DVD, choose Prepare DVD, and follow the prompts. After DVDA is through preparing the files, use Windows Explorer to check the total size of the VIDEO_TS folder than DVDA created. If the size on disk is under 4.7GB, then go ahead and burn your project to a DVD.

Rob
PeterXI wrote on 3/2/2005, 8:47 PM
Ha ha ha! I wish I read this post on the weekend instead of re-rendering a 1 hour 40 minute piece! Of course DVD-A displays fibs. Sad but true. Hopefully DVD-A 3a will be more in line with Encore with respect to flexibility. I don't like Encore much becasue it so cumbersome but it is a good fallback.
ScottW wrote on 3/3/2005, 4:51 AM
There are 2 factors at work here. 1) DVDA's inability to accurately estimate project sizes and 2) base 2 vs. base 10 counting.

The 4.7GB printed on the DVD is a base 10 number; windows shows you sizes base 2, so from a windoze perspective you can only fit 4.37GB of data on a DVD. Another way to look at it is 1K to most folks is 1,000 but to computers, 1K is 1,024.

DVDA is showing you numbers base 10 in addition to over estimating project sizes.
johnmeyer wrote on 3/3/2005, 8:24 AM
Further on the decimal vs. binary way of measuring data.

A blank DVD is just slightly under 4.7 Gbytes (decimal). If you start with this, and then keep dividing by 1024, you get the same measurement in kilobytes, megabytes, and finally gigabytes. The following is the result:
Bytes           KBytes      MBytes  GBytes

4,699,979,766   4,589,824   4,482   4.377