Yes you can tell I don't know a great
deal about this :-)
We're trying to import a clip into our Avid system from a
Pinnacle system. The Pinnacle system is a DV25 AVI video with 4
channels of audio. The Avid system will only recognize two of
the 4 audio clips when they are quicktime wrapped. So yes I need
to convert the 4 channel audio clip into 2 two-channel stereo
tracks.
Thanks,
Mark
Unfortunately, QuickTIme does not currently demultiplex the other
two channels of audio from the DV stream, it mixes the left and right
channels together. I believe there was a time when we couldn't
reliably depend on all cameras delivering silence on the two unused
frames in 12-bit streams, and things got stuck that way. It's on
our list to fix.
Daniel Steinberg
QuickTime Engineering
On 6/29/06, Dave wrote:
Hi Mark,
In a way, 4 channels of audio already are two stereo pairs,
depending on what you plug them into... Can you give a bit more
information about what you're trying to do? E.g. Do you
have a four-channel audio track, which you need to convert to two
two-channel (stereo) tracks? Or something else? Are you
looking to convert a movie from one format to another in non-realtime,
or to output a 4-channel track to two separate stereo output devices
as it plays?
QuickTime 7 supports multichannel audio across the board, for export
and playback, so it should be possible to achieve what you need, once
we know what it is :-)
Dave.
Fr
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