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[QUOTE=SketchyNS;1955334]This may seem like a stupid question, but when you copy a DVD with lesser quality, due to the capacity of DVD-5, where will you see this loss of quality?
Is there anyway to compress a movie so that there is no visual loss of quality, but rather all lost in the audio portion?[/quote]
For the most the quality loss is in the video part, and most of times it can be noticed only watching the compressed movie on a large screen.
However, bear in mind that the resulting quality is related also on the original movie quality: as a general rule, the higher is the bitrate of the original, the better is the quality of compressed video.
Moreover, there is a large subjectivity in the video quality evaluation. Some people are able to see artifacts also in the original movie.
Probably it’s possible to compress the audio part, but I don’t know how to do it.
[QUOTE=SketchyNS;1955334]I have burned a full disc with 100% quality to a blank DVD+R DL. My computer can read it, but my DVD player cannot. Any ideas why? If my DVD player is not able to read DL discs I have burned to, then why would it be able to read the DL manufactured version? Different DL formats?[/QUOTE]
Most of times this is due to a low quality disc or to a bad burned disc. I suggest to try again with a Verbatim +R-DL disc (most of times -R DL discs have a very low compatibility with standalone players).
Also updating the burner firmware can improve writing quality