My dvd player dvp-ns55p not playing some discs that it used to

I have a dvd player model # DVP-NS55P. I recently bought Rio2. It played several times and then started taking forever to load the disc to the point where I now get the message: "cannot load disc". The dvd is not scratched and is in perfec condition. In fact it plays in my laptop. I am however able to play other discs in the player without any issues. Please help!!!

Three things you can try:
1. Clean the superdrive with a proprietory CD/DVD lens cleaner that uses tiny brushes.
2. Perform an SMC reset:
Resetting the SMC (System Management Controller) on Intel-based Macs:
http://support.apple.com/kb/ht3964 and
http://support.apple.com/kb/HT1237?viewlocale=en_US
Resetting your Mac's PRAM and NVRAM:
http://support.apple.com/kb/ht1379
If you are using a Wireless Keyboard:
http://support.apple.com/kb/TS3273
3. Try the free DVD player VLC:
http://www.videolan.org/vlc/
which performs better than the built-in DVD Player.

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My Macbook was purchased in 2007; So it is a bit old. I haven't used the DVD drive very often.
I bought two new DVDs from Amazon recently. However, when I played them in my Macbook using DVD Player, the disk pauses and skips very often, making it impossible to watch the DVD. In addition, the Player would display the "Skip over damaged data" warning.
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You can also manually adjust the video on Apple's built video player by going to the Window menu -> Video Zoom and unchecking lock aspect ratio if you want to customize it.
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Apple's DVD Player also supports slow and faster play through its floating controller menu that is available via the Window menu -> Show Controller. Note, the slower play is available through the pullout drawer that looks like this:
The top controls that are double arrows are fast forward when held down, as opposed to change chapter if just clicked quickly. command-shift-right arrow on the keyboard (command is the Apple logo key) fast forwards even faster if held down long enough and command-shift-left arrow reverses faster and slower if held down long enough and both go in a loop from 2x to 32x in factors of 2, which when let go will give you the speed you want to change.
Sometimes you can also do a color calibration of your display if you are more used to different color gradients in Apple menu -> System Preferences -> Displays -> Color and then select Calibrate.
To zoom video on Mac OS X, you can also use universal access. Command-Option-8, followed by a command-option-equal sign on the horizontal keys above the main body of the keyboard for increase size, or a command-option-minus sign for decrease size. To disable this feature command-option-8 again. Command is the Apple logo key.
Another DVD Player made for the Mac is Interactual's DVD Player.
Screen Capture of DVD is possible with the freeware Capture Me.
http://www.chimoosoft.com/captureme.html
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Windows Media Player cannot play the file. The Player might not support the file type or might not support the codec that was used to compress the file
How do I fix this?

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Hi,
Having a strange issue. Quicktime X will not play some of my Apple Mpeg 4 Movie files anymore.
The files open fine in Quicktime 7, but not Quicktime X.
I receive the error message "The document could not be opened. A required Codec is not available"
I have installed other codecs (Flip4Mac as well as Perian), but no luck. Have re-installed Quicktime X (10.1) and software is all up to date (running Lion 10.7.2). The movie file works fine if I import it to iTunes as well.
Called AppleCare Support and they could not come up with an solution. Does anyone here have any ideas?
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(BTW, I just realized this was an MPEG-4 topic - my issue wasn't necessairly centered around that architecture)
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Since I mentioned "from," I should have mentioned what the codec/wrapper was (it was captured into a .mov file using DV/NTSC via "Capture Now" in Final Cut Pro studio V7, via an analog-to-digital converter). What makes this confusing is that files captured with the same settings sometimes open right into QuickTime X with their audio/video intact, and at other times, only the audio shows up (where upon opening that same file in QT 7, we can see both audio and video). Interestingly, the problem files icon shows up on the desktop as the generic movie icon, whereas the "normal" files' icon is the first frame of the video.
May we assume at this point that the source video data is DV-25 with 16-bit Interger (Linear PCM) audio sampled at 48.0 KHz and it is the scratch MOV file that may or may not open/play correctly in QT X but always opens correctly in QT 7?
Ultimately, though, this is an unimportant point in solving my issue. Why? Well, if I can successfully open the problem files in Compressor (e.g., see/hear the video/audio), then I can theoretically re-compress (or "re-wrap?") them to whatever codec I want - ideally one 100% compatible with QuickTime X.
I took a test file, placed it into Compressor, and applied the DV/NTSC setting to it (yes, I know, the same setting the file already had). After re-encoding (which took very little time), the file was perfectly executable in QuickTime X - both Audio and video showing as to be expected, and no real difference in quality (not that VHS source is quality to begin with).
This sounds as if the "problem" file's container may be the source of the problem. As I don't know if your Compressor test is passing the data through to a new faile container, I would make an additional test here. If your version of QT 7 is keyed for pro use, I would simply use the "Save As..." File menu option to to create a new file container. In fact, I would probably just create a "reference" file rather than another "standalone" file here—a very, very fast operation—and then open the secondary file in the QT 7 "Properties" window to ensure all of the data tracks (1 video, 2 audio, and 1 timing) are present. If all looks good, I would then try opening the reference file in QT X to see it it now plays. (I.e., whether you use a reference file here or a standalone file, the object is to see if the QT X player will now recognize all contained data tracks whether resourced by reference or physically contained in/via the new wrapper.)
Could this have been answered without knowing the complete "from" specs? Probably… which is why I posted to the help forum in the first place - the goal being some other reader may have had the same issue, and had a handy solution or suggestion, saving me the time of experimentation (what forums are great for).
I don't know about you, but I would still be looking at profile/level combination settings to see if an an assumed MPEG-4/AVC video and/or AAC audio settings had been properly encoded for QT playback.
I have no doubt that there's a technical difference between the files that created this issue in the first place. But, the solution of re-compressing with an identical codec did the trick, which for this project is good enough for me.
Recompressing data is slower than rewrapping data which is slower than rereferencing the data pointers. But, if your solution works, then that is all that matters.

My dvd player dvp-ns55p not playing some discs that it used to

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