I have several DVD Players, and my DVDs from DVD Workshop work on most, but my main DVD player cant play the DVDs as it as errors reading teh disk and then when i get it to read it then has other errors such as it cant paly the first video of my videos entered, and i dont mean the first play. The disks im using are DVD+RW burnt at a 2.4x, PAL.
Any help would be greatly appreciated.
-Akiri
Why do some DVD players have problems with play my DVDs?
In the first place DVD±RW are the most difficult disks to reproduce on a DVD player.
To understand what is happening, when a DVD plays with a commercial pressed disk, a laser beam follows a track which contain a series of digital "bits", represented by 0 or 1. It does not matter which way round they are, but a O may be represented by transparency, so that the beam goes straight through and is reflected back whence it came by the mirror surface and is directed to a photodetector semiconductor which generates the appropriate signal. With a 1, a pit is physically pressed into the plastic, which refracts the light away from where the mirror would reflect it back and the photodetector "sees" black.
With a DVD±R, it is not possible to burn a pit at the appropriate level in the plastic. Instead, there is a photopolymeric layer which passes only some of the light for a 0 and a little less of the light for a 1. The contrast between a 1 and a 0 is therefore much lower. With a DVD±RW, there is a metallic layer of a special quaternary alloy in the middle of the disk. This has the property of changing phase, hence its opacity of a thin layer, when burnt. The contrast betweena 1 and a 0 is far less than that, even of a ±R disk. This makes it more difficult to generate the appropriate electrical signal.
It can be assumed that all players can play pressed disks. Some cannot play ±R disks. More cannot play ±RW disks (one of mine cannot).
However, it does not stop there. Bitrate also enters into the equation. The lower the contrast, the more difficult it is for a player to follow a given bitrate. With sustained high bitrates, many players may give glitches, even with pressed disks let alone ±R or, worse, ±RW disks, or they may not even try to play the disk if it is really bad. Yet the same players may play perfectly at more reasonable bitrates.
To understand what is happening, when a DVD plays with a commercial pressed disk, a laser beam follows a track which contain a series of digital "bits", represented by 0 or 1. It does not matter which way round they are, but a O may be represented by transparency, so that the beam goes straight through and is reflected back whence it came by the mirror surface and is directed to a photodetector semiconductor which generates the appropriate signal. With a 1, a pit is physically pressed into the plastic, which refracts the light away from where the mirror would reflect it back and the photodetector "sees" black.
With a DVD±R, it is not possible to burn a pit at the appropriate level in the plastic. Instead, there is a photopolymeric layer which passes only some of the light for a 0 and a little less of the light for a 1. The contrast between a 1 and a 0 is therefore much lower. With a DVD±RW, there is a metallic layer of a special quaternary alloy in the middle of the disk. This has the property of changing phase, hence its opacity of a thin layer, when burnt. The contrast betweena 1 and a 0 is far less than that, even of a ±R disk. This makes it more difficult to generate the appropriate electrical signal.
It can be assumed that all players can play pressed disks. Some cannot play ±R disks. More cannot play ±RW disks (one of mine cannot).
However, it does not stop there. Bitrate also enters into the equation. The lower the contrast, the more difficult it is for a player to follow a given bitrate. With sustained high bitrates, many players may give glitches, even with pressed disks let alone ±R or, worse, ±RW disks, or they may not even try to play the disk if it is really bad. Yet the same players may play perfectly at more reasonable bitrates.
[b][i][color=red]Devil[/color][/i][/b]
[size=84]P4 Core 2 Duo 2.6 GHz/Elite NVidia NF650iSLIT-A/2 Gb dual channel FSB 1333 MHz/Gainward NVidia 7300/2 x 80 Gb, 1 x 300 Gb, 1 x 200 Gb/DVCAM DRV-1000P drive/ Pan NV-DX1&-DX100/MSP8/WS2/PI11/C3D etc.[/size]
[size=84]P4 Core 2 Duo 2.6 GHz/Elite NVidia NF650iSLIT-A/2 Gb dual channel FSB 1333 MHz/Gainward NVidia 7300/2 x 80 Gb, 1 x 300 Gb, 1 x 200 Gb/DVCAM DRV-1000P drive/ Pan NV-DX1&-DX100/MSP8/WS2/PI11/C3D etc.[/size]
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Liamo
Do a search on
http://www.videohelp.com/dvdplayers
for your player. You will find comments on what discs have played/not played for others.
http://www.videohelp.com/dvdplayers
for your player. You will find comments on what discs have played/not played for others.