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MXF two channel audio

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Aleksandrs Dubanevics
MXF two channel audio
on May 26, 2016 at 11:47:40 am

Hi all,

I have Sony Vegas Pro 12 and I'm trying to render an mxf file that would have only 2 audio channels. But when I choose 2 channels from the drop-down list, what I get is a file with 8 channels - 2 channels with sound (what I need), and 6 more silent channels (which I don't need). What am I doing wrong? Can I do something about it - just to get my file without those 6 silent channels? Any help would be much appreciated.

Many thanks!
A.


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Marco Baer
Re: MXF two channel audio
on May 26, 2016 at 4:11:27 pm

Could you specify which kind of MXF is meant?

There are some professional flavors of MXF which are standarized to a given count of audio channels and the Vegas renderer then only defines the mapping across the defined amount of audio channels.


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Aleksandrs Dubanevics
Re: MXF two channel audio
on May 26, 2016 at 4:57:59 pm

Well, I'm using PAL MPEG IMX 50 Widescreen template, just changing bitrate to 30 (CBR).


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Marco Baer
Re: MXF two channel audio
on May 26, 2016 at 5:06:17 pm

XDCAM IMX standard allows for either 4 channel audio, if audio is 48 kHz/24 bit, or 8 channel audio, if audio is 48 kHz/16 bit. There is no 2 channel IMX.


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Aleksandrs Dubanevics
Re: MXF two channel audio
on May 26, 2016 at 5:33:28 pm

Thank you! I was suspecting this... It's just really strange that the TV station I need to send my file to asks specifically for IMX format (basically, they want an IMX30 625/50 (30Mb/s) compressor) and allows only 2 channel audio? Could it be that I choose the wrong template to render my file?


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Marco Baer
Re: MXF two channel audio
on May 26, 2016 at 7:56:04 pm

I would ask back to the TV station. I'd assume they mean what Vegas Pro does. Only channel 1 and 2 filled with audio. They can't expect what isn't possible and have to take XDCAM IMX as what it is.


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Aleksandrs Dubanevics
Re: MXF two channel audio
on May 26, 2016 at 7:58:49 pm

Thank you! That's what I'm going to have to do.


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