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Dual Layered DVDs
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Windsor
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Joined: 12 May 2006
Posts: 12

PostPosted: Wed 10 Jan 2007, 19:33 Reply with quote

Does anyone know how to shorten the freeze time on dual layered DVDs?

I am watching a movie and there is a transfer from first layer to the second, I see a freeze of a frame about 2 to 3 seconds, and then the movie continues to play.

Is there a way to either bring that waiting time to 0 or to minimum. Since in originals there is no waiting period, but you can tell the layers got changed, because a frame gets shaky about split of a second, and then resumes.

Any suggestions would help.

Windsor
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Jerome
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Joined: 18 Jul 2005
Posts: 466
Location: France

PostPosted: Wed 10 Jan 2007, 20:23 Reply with quote

When the player have to change to the second layer, it have 3 things to do.
- 1) change the laser focal to the second layer.
- 2) resynchronize data to find the begin of the stream.
- 3) fill the frame buffer

1 and 2 can be the longest and depend only on the DVD player.
3 depend on how the mpeg data are compressed. Generaly, the playback can only start when the three first frames are decoded. It's not so long, about 100 or 200ms

So, if you want this time be shorter, just buy a better DVD player Smile

The best solution is to force the layer swap on a black picture, but it's not always possible.

Jerome
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Windsor
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Joined: 12 May 2006
Posts: 12

PostPosted: Wed 10 Jan 2007, 23:22 Reply with quote

Thanks Jerome:

It helped to know these things. I do have a better (more expensive) DVD player. I reason I bought a cheap one, is that when I played my backed-up DVDs, the expensive DVD player was displaying a broken picture and a lot of stops, I called the blank DVD manufacturer, and he said if I buy the cheapest DVD player the problem will go away, because the cheap DVD players are not as sensitive. And it worked!

And now with the delay… I guess I can live with it. It's not a serious matter.

Thanks any way.

Windsor
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