A few general questions I have?

J

jimmygreen

Member
Ok these may sound stupid...

1. Can anyone tell me why writable dvd's have a purple underside when commercial ones are gold/ silver?

2. When importing/ exporting 720 x 480 footage through AE or Premiere for dvd, do you always stick with the original size for maximum quality? Or is it advisable to blow the image up to 1080?

3. Is good slow motion possible with 24p?

.. I have lot's more but i'll think i'll stop for now.. so If anyone can offer answers it would be three down! thanks...
 
I'm gonna guess answer 1

Commercial DVD's are pressed from a glass master, so no burning required.

The DVD's we write are made to be burned with laser, so I'm sure the coloring is a by product of the chemical make up of the layer the laser interacts with.

- Derrick
 
More on Question One:

Replication broadly describes an injection molding and metalizing process for manufacturing mass-produced CDs and DVDs. Initially a glass master is produced containing the original data to be reproduced (which is why this process is often called ‘glass mastering’). Replicated discs appear pure silver on the underside, as you would expect when you buy a CD or a DVD from a retail outlet.

Duplicated discs have information recorded to them by a laser in a duplicator (DVD Burner). The information is ‘burnt’ into a photoreceptive dye layer on the disc. This dye layer is what makes duplicated CDs appear silvery green and duplicated DVDs appear purple blue on the underside.
 
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