A month ago, more or less, I had to compress in AAC (low Complexity becouse
QT doesn't support High Efficiency) a mono file. After setting it as mono
I've almost halved the default datarate to discover that the quality was as
orrible as if I had simply left the stereo output.
I've had the feeling that QT mono encoding just didn't work; In other words
that two identical mono channels were exported.
Gianni Maselli
----- Original Message -----
From: "Frank Fulchiero" <email@hidden>
To: <email@hidden>
Cc: <email@hidden>; "QT-Users" <email@hidden>
Sent: Monday, August 22, 2005 2:53 AM
Subject: Re: Stereo to mono in QTPro 7?
> James,
> Basically, we have the same compressed mono audio on two stereo
> channels, and want to either eliminate one channel, or extract it, to
> halve the file size and data rate, without recompressing, to a mono
> file. This should hopefully be easier than mixing two different stereo
> channels to one mono.
> Yes, I'll try Peak, we have version 4.
> Thanks for the ideas,
>
> Frank Fulchiero
> Digital Media Specialist
> Connecticut College
>
> On Aug 21, 2005, at 8:29 PM, email@hidden wrote:
>
> >> Regarding exporting to mono in QT Player Pro,
> >> I though of this, but wouldn't it recompess the audio?
> >> Probably not a problem for voice quality though.
> >
> > If you are starting with compressed stereo source then
> > there is not currently a method that you can use to mix
> > down to mono directly without reencoding.
> >
> > You would need to bounce the Stereo compressed
> > source to LPCM and then reencode, or transcode the
> > compressed source directly into the ultimate target
> > output format. If you are starting with LPCM source
> > then you would be able mix down from stereo (or
> > multichannel) source to mono.
> >
> > It may be possible to use an audio editor such as Peak
> > to extract a single channel from a stereo encoded file
> > directly; but, I suspect that it would be making a bounce
> > to LPCM data before it actually performs the edit. Worth
> > checking into. They have a fully functional time limited
> > demo for all of their products posted on their website.
> >
> > http://www.bias-inc.com/downloads/freeTrials/
> >
> >
>
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