hardware error

johnnyboy wrote on 8/25/2008, 3:28 AM

When optimising a DVD I have to go down to 85% burning 3968mb onto a disc with 4700mb capacity in order to avoid a hardware error message. Anything above this will fail even though there seems to be room. When I play the failed disc it will play up to almost the end and then freeze. The discs are Philips DVD+RWs.

Comments

darkframe wrote on 8/26/2008, 2:11 AM

Hi,

actually the maximum should be approximately 4377MB. 4.7GB is what manufacturers tell you but that is based on the decimal system. If you divide 4,700,000,000 three times by 1024 you're getting 4.377xxx as indicated above. Actually the real capacity is a bit higher because the discs can take a bit more than 4,700,000,000 bytes but with 4.377GB you're on the safe side.

The reason for all that is that in a PC's binary world a real Gigabyte (or Gibibyte as they're saying today) is

1024 * 1024 * 1024 = 1,073,741,824 Bytes

hence 4.7 (real) GB would be approximately 5,046,586,572 Bytes.

So you may try to burn 4.3GB to your disks. If your drive and/or the disks do actually not allow for more than 3.9GB I'm sorry, I don't know what might be wrong.

Cheers

darkframe

musicvid10 wrote on 8/26/2008, 6:29 AM

You have to leave room for your menus and miscellaneous media. If the size of your movie is 3.9GB, that is about average.

Then again, freezing at the end can indicate bad media or hardware. Suggest you try different media (search the posts for suggestions) and back off from Max burning speed.

johnnyboy wrote on 8/28/2008, 2:50 PM

it would appear to be a bug. I optimised up to the theoretical max size but then prepared an iso image. Then used an image burner to produce the DVD. The burning software does the job and indicates that there is sufficient room on the disc.