No sound from Quicktime Pro

I've developed an issue whereby I cannot get any sound at all from my QT player, just video.
I followed the instructions via this link
http://support.apple.com/kb/HT2178
but everything was as it should be, but there was a message under audio output within the Audio Midi setup saying 'Output is not supported'
VLC player works absolutely fine, any ideas what might be the issue?

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I am trying to export a movie from QuickTime Pro to an an AVI file
AVI is just a container ... specifically, which codec are you using when exporting? And why export to AVI?
QuickTime gives me the option to save the video straight from the web, but as soon as I turn off my AirPort it tells me that I need internet to continue watching the movie
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I have several AVI movies I took and want to import them into iMovie, so I can create a DVD that will play in any DVD player or computer. (Along with a bunch of pictures.)
Should I convert them with QuickTime Pro 7 (QTP7) to another format, and if so, what is the best export setting.
I have export them using *_QuickTime 10_* and QTP7 to *MOV, MP4, & M4V* and the output is *+bad bad bad+*.
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Should I convert them with QuickTime Pro 7 (QTP7) to another format, and if so, what is the best export setting.
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I have export them using QuickTime 10 and QTP7 to MOV, MP4, & M4V and the output is bad bad bad.
The quality of your output file will depend on a number of things: primarily the quality of your source file, the efficiency of the target codec, and the specific settings used. (About which you did not elaborate.) The rule of thumb here is that your output will never be better than your input and each re-comprssion of the data has the potential to degrade the quality to some degree.
I have tried both export and save-as. Neither has done a good job.
The "Export" option re-compresses the data while the "Save As..." option only places the original data in an MOV file container. So if this output is "bad, bad, bad," then I suspect your source file(s) are not of high quality to begin with. (This seems to be confirmed by the very low audio sampling rate which implies the video data rate was probably also low to conserve file storage space.)
The internal information of the AVI movies are: (as reported by QT)... Format: Apple OpenDML JPEG, 640 x 480, Millions, 8-bit Unsigned Integer, Mono, 11.024 kHz
The basic codecs here appear to be both playback and conversion compatitible with QT (other than the very low sampling rate which some QT apps may not like). Thus, if your work flow is to simply burn DVDs that can be played on commercial players, the AVI could most likely be dropped to iDVD for authoring. On the other hand, if you are editing in a recent version of iMovie, then that app may not like the AVI file container. In this case, the best quality you can likely expect would be to use the "Save As..." option to place the data in an MOV file container and import to iMovie.
Unfortunately, editing in iMovie '08/'09/'11 is done "by reference" which means your output file will be created by exporting the impoted source data to another compression format. The default would be H.264/AAC which is a highly compressed format which in turn would be re-compressed again by iDVD to multiplexed MPEG2/PCM content further reducing quality by using a less efficient video codec. My recommendation for export from iMovie in this case would be AIC/Linear PCM. (I.e., to export your edits to the Apple intermediat video codec using the original file size and frame rate with just a bit of "sharpening" and using 16-bit/48 kHz Linear PCM audio (which is what will be used to create the DVD).
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How much are you willing to spend?
Is there a way to just use iDVD with the original AVI movies?
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Hello CoDean,
Continue your troubleshooting with the article below to assist with the issue of not sound on your MacBook Pro. Look at the headphone jack to see if there is a red light coming from there as well as looking in System Preferences > Sound to see if the output is stuck on digital out.
Troubleshooting issues with no audio from built-in speakers on Macs
http://support.apple.com/en-us/HT203186
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No sound from Quicktime Pro

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