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DVD won't play properly.
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<blockquote data-quote="CyberSimian" data-source="post: 1277262" data-attributes="member: 141969"><p>Is there any visible damage or defect on the disk, especially near the centre (where playback starts)?</p><p></p><p>Some of my oldest CDs (manufactured when CD production was still in its infancy) have pinholes in the reflective coating (hold the disk up to the light to check). Another CD has a small discoloration that looks like a burn mark. Both disks were like this when purchased new, but both play without problem.</p><p></p><p>I have another CD that has an original paper label with a small bubble about 1 mm in size very close to the centre, and this (I think) causes the CD clamp to misalign the disk so that it is not at 90 degrees to the spindle when clamped. This disk plays differently on different players. On the poorest player, the outmost track jumps around and never actually finishes playing. On middling players, the disk plays but with varying degrees of audible defect. On the best player (a Sony), there is no audible defect.</p><p></p><p>My brother had a disk that he mistreated horribly. The playing side was covered in scatches, to the point where it no longer played in his PC, but it still played in the CD player in his hi-fi system.</p><p></p><p>In the past, I have found that MP's menu handling logic was not 100% correct for DVDs. It is not correct in my Pioneer DVD player either, but the two players are differently incorrect. In particular, the selection that should have been highlighted had no highlight (so you could not tell which selection was highlighted). But only some DVDs were affected. The DVD drive in my HTPC has not worked for several years, so MP may have improved since I last used MP to play a DVD.</p><p></p><p>I think that some (possibly most) DVDs have some sort of copy protection built-in. Perhaps the problem player is overly sensitive to the copy protection? I don't know whether this is a function of the hardware (i.e. not fixable), or the software (i.e. different software might work).</p><p></p><p>-- from CyberSimian in the UK</p></blockquote><p></p>
[QUOTE="CyberSimian, post: 1277262, member: 141969"] Is there any visible damage or defect on the disk, especially near the centre (where playback starts)? Some of my oldest CDs (manufactured when CD production was still in its infancy) have pinholes in the reflective coating (hold the disk up to the light to check). Another CD has a small discoloration that looks like a burn mark. Both disks were like this when purchased new, but both play without problem. I have another CD that has an original paper label with a small bubble about 1 mm in size very close to the centre, and this (I think) causes the CD clamp to misalign the disk so that it is not at 90 degrees to the spindle when clamped. This disk plays differently on different players. On the poorest player, the outmost track jumps around and never actually finishes playing. On middling players, the disk plays but with varying degrees of audible defect. On the best player (a Sony), there is no audible defect. My brother had a disk that he mistreated horribly. The playing side was covered in scatches, to the point where it no longer played in his PC, but it still played in the CD player in his hi-fi system. In the past, I have found that MP's menu handling logic was not 100% correct for DVDs. It is not correct in my Pioneer DVD player either, but the two players are differently incorrect. In particular, the selection that should have been highlighted had no highlight (so you could not tell which selection was highlighted). But only some DVDs were affected. The DVD drive in my HTPC has not worked for several years, so MP may have improved since I last used MP to play a DVD. I think that some (possibly most) DVDs have some sort of copy protection built-in. Perhaps the problem player is overly sensitive to the copy protection? I don't know whether this is a function of the hardware (i.e. not fixable), or the software (i.e. different software might work). -- from CyberSimian in the UK [/QUOTE]
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