Problems With MPEG-2 Codec

I've been having problems with Apple's MPEG-2 codec for Quicktime.
All my 640x480 movies are labeled as 720x480, and when I convert them to .mp4 with VisualHub (third party software) it stretches them to 720x480. It didn't do this before I got the codec.
Is there any way to fix this?
Alternatively, how do I uninstall the codec?
Thanks.

I am using the Sony HVR-Z1U camera. I have firewire connection on the camera that I have connected a Sony HVR-MRC1K memory recording unit to. The tape in camera starts the recording then the digital recording kicks on. I have to always have a tape in camera to start recording onto firewire connect digital hard drive recorder. As I mentioned in my previous post, the HVR-MRC1K records to a 32 gb compact flash high speed card and saves files as M2T files (MPEG2) I covert/transcode the files using Clip Wrap software to Quicktime .MOV files. I am them able to import them into FCP X and or iMovie. Once in FCP X the files play, but will skip or drop frames. Again there is no issue on my other mac using FCP 7. I don't even have to transcode files in Clip Wrap. They import automatically using a connected USB drive and Compact Flash Card. I really would like to use FCP X and move forward and not have to take a step backward using only FCP 7. I am in Fort Myers Florida. There is an Apple store nearby in Estero, Florida and one a little further in Naples Florida. I have only gone to the Estero Florida store. The Naples store had FCP classes only twice a week and the Estero store had none.

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If I remember well, N70 plays mp4 video without problems. Try resizing during encoding to 176 x 144 and reducing frame rate to 15 frames per second. Also try to keep data rate below 200 kb/s. If you are using MediaCoder do not go with default settings for Nokia N70, they are too optimistic.
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Not all the following will apply to Panther (10.3.x) so look carefully on the sites mentioned for the correct versions:
These are the downloads and the settings you need in order to view/hear pretty much everything that the net can throw at you: The setup described below has proved repeatedly successful on both PPC and Intel macs, but nothing in life carries a guarantee!
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RealPlayer 10 for Mac from http://forms.real.com/real/player/blackjack.html?platform2=Mac%20OS%20X&product= RealPlayer%2010&proc=g3&lang=&show_list=0&src=macjack
Flip4Mac WMV Player from http://www.microsoft.com/windows/windowsmedia/player/wmcomponents.mspx (Windows Media Player for the Mac is no longer supported, even by Microsoft)
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Hello
We own a Panasonic camera (AJ-PX5000G) and we film in 1080p50 with the AVC-Intra100 Codec. When importing longer clips in Premiere Pro, the video is fully loaded, but the waveform of the sound ends at the Time Code 00:02:28:35.
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We also tried to import the Clips with Adobe Prelude directly from the P2-Card but there are the same problems.
The Clips in 1080p50 AVC-Intra100 have a bitrate of 227Mbps. After 2 Minutes and 28 Seconds 4Gb are written on the P2-Card and the Camera starts a new picture file and 4 sound files..
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(Workstation: Dell Precision T3600, Intel Xeon E5-1620 @ 3.60 GHz, 16 GB RAM, Windows 7 Professional 64-bit, Service Pack 1, Premiere Pro CC 2014.1 (Build 8.1.0)   )
Mediainfo of the P2-Cards:
General
Complete name                            : \CONTENTS\VIDEO\0068T7.MXF
Format                                   : MXF
Format profile                           : OP-Atom
Format settings                          : Closed / Complete
File size                                : 3.92 GiB
Duration                                 : 2mn 28s
Overall bit rate                         : 227 Mbps
Encoded date                             : 2014-10-15 13:33:41.000
Writing application                      : Panasonic P2 2.0
Writing library                          : Panasonic P2 2.0
Video
ID                                       : 2
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High 4:2:[email protected]
Format settings, CABAC                   : No
Format settings, GOP                     : N=1
Format settings, wrapping mode           : Clip
Codec ID                                 : 0D01030102106002-0401020201323104
Duration                                 : 2mn 28s
Bit rate                                 : 227 Mbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 50.000 fps
Standard                                 : Component
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Bit depth                                : 10 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 2.193
Stream size                              : 3.92 GiB (100%)
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Mediainfo Audio-Datei P2-Card:
General
Complete name                            : \CONTENTS\AUDIO\0068T700.MXF
Format                                   : MXF
Format profile                           : OP-Atom
Format settings                          : Closed / Complete
File size                                : 13.6 MiB
Duration                                 : 2mn 28s
Overall bit rate mode                    : Constant
Overall bit rate                         : 770 Kbps
Encoded date                             : 2014-10-15 13:33:41.000
Writing application                      : Panasonic P2 2.0
Writing library                          : Panasonic P2 2.0
Audio
ID                                       : 3
Format                                   : PCM
Format settings, Endianness              : Little
Format settings, wrapping mode           : Clip (AES)
Codec ID                                 : 0D01030102060400
Duration                                 : 2mn 28s
Bit rate mode                            : Constant
Bit rate                                 : 768 Kbps
Channel(s)                               : 1 channel
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Stream size                              : 13.6 MiB (100%)

Hi,
we have the same problem!
It is not possible to play audio with the AVC-Intra100 Codec fluently.
Can anybody help?
Thanks,
Anja

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