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Mac Forum / General / Hardware / April 2006DVD dual layer
Will a movie burned on a dual layer DVD using iDVD be playable on most DVD players? In article <hhelvie-CB232B.15274227042006@newsclstr01.news.prodigy.com>, Henry Helvie <hhelvie@notyahoo.com> wrote: > Will a movie burned on a dual layer DVD using iDVD be playable on most > DVD players? Most players? Probably not, but not because of iDVD. The dual-layer blanks are simply not as compatible with home DVD players. (Just as DVD+R is less compatible than DVD-R, though that's becoming less of an issue on newer players.) Here's one of many reports on the dual-layer topic: http://www.insanely-great.com/news.php?id=3535 You might try buying a small package of them to see if they play on your own player. But for anything I'm going to be sending to someone else, I'd still use a single-layer DVD-R for the best compatibility.  SignatureGarner R. Miller Clifton Park, NY =USA= http://www.garnermiller.com/ On 4/27/06 2:39 PM, in article 270420061539391284%garner@netstreet.net, > In article > <hhelvie-CB232B.15274227042006@newsclstr01.news.prodigy.com>, Henry [quoted text clipped - 15 lines] > your own player. But for anything I'm going to be sending to someone > else, I'd still use a single-layer DVD-R for the best compatibility. How does Dual Layer work? Does it record two layers of data on one side? Somehow I thought it simply recorded on both sides of recordable DL DVDs. Dopey me. > How does Dual Layer work? Does it record two layers of data on one side? > Somehow I thought it simply recorded on both sides of recordable DL DVDs. > Dopey me. Most pressed DVDs you buy are dual-layer -- it means you don't have to flip your movie over halfway through, as you did with the original laserdiscs. I have exactly one DVD in my collection -- GoodFellas -- that's dual-sided like that, but they're very rare, and a pain in the neck. All my others are dual-layer, or small enough where a single layer holds everything. Basically, a dual-layer disc has two layers of recorded material, and the reflective layer closest to the laser is semi-transparent. By adjusting the laser, the DVD player can shift its focus between the two layers, and see right through the first layer to the second. Very neat. But how can you make a *recordable* DVD with another layer, and not melt through the intervening layer in the process? I have no idea; it's some amazing engineering, that's all I can say. Here's a very technical article that discusses it: http://www.burnworld.com/howto/articles/intro-to-dual-layer.htm SignatureGarner R. Miller Clifton Park, NY =USA= http://www.garnermiller.com/ On 4/27/06 10:04 PM, in article 270420062304217658%garner@netstreet.net, >> How does Dual Layer work? Does it record two layers of data on one side? >> Somehow I thought it simply recorded on both sides of recordable DL DVDs. [quoted text clipped - 19 lines] > > http://www.burnworld.com/howto/articles/intro-to-dual-layer.htm Wow, cool tech. Thanks for explaining it to me. > Will a movie burned on a dual layer DVD using iDVD be playable on most > DVD players? I suspect so, since many commercial movie DVDs are dual layer. I burnt one using Toast Titanium and my Lite-On DVD recorder played it just fine (I wish that one would burn dual layer, however). > I suspect so, since many commercial movie DVDs are dual layer. All video players can refocus the lens onto two layers. But there's a world of difference between a stamped DL disc and a recordable one. > I burnt one using Toast Titanium and my Lite-On DVD recorder played it > just fine (I wish that one would burn dual layer, however). I would expect DVD recorders to do a better job of reading recordable media, simply because they have to be able to read their own creations. I agree with the previous poster. Use single-layer, unless you really have so much content that it won't fit on anything else. In addition to greater compatibility, the media will cost less. -- David |
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