Re: video conversion


Subject: Re: video conversion
From: Sean Ferris (sean@banbridgeinn.com)
Date: Tue Dec 14 2004 - 20:31:03 EST


Another question regarding projects involving video and dvd authoring.

If I wanted to have the audio in"surround sound " as opposed to just stereo,
is this something I need to take into consideration at the beginning of the
audio creation or can regular audio in stereo be converted or encoded when
the project is rendered?

what other multi channel audio formats are available?

thanks,

Sean

----- Original Message -----
From: "Tim Sutton" <timsutton@fastmail.fm>
To: <cec-conference@concordia.ca>
Sent: Tuesday, December 07, 2004 2:54 PM
Subject: Re: video conversion

> Well, if you're wanting no quality loss, it doesn't hurt to use a
> lossless codec for any intermediate stage of your process where you need
> to move between programs (like an MPEG-2 encoder in a DVD authoring
> program). Uncompressed video takes up mega disk space, and even though
> it doesn't have to be decompressed, your hard drive(s) need to work a
> lot harder to access and scrub through the video, so there are CPU power
> vs. hard drive drive issues you'll probably have to experiment with.
>
> Huffyuv is free for Windows. Microcosm (http://www.digitalanarchy.com)
> seems to be very effective (and decompresses fast I think), but it costs
> $99. If you're using Quicktime, it seems most people will use the
> Animation codec at best quality, but I'm not sure how much of a
> compression ratio you'll achieve (but it is lossless).
>
> These options probably aren't as important if you're not having to go
> between programs regularly (to do batch processing/effects for example),
> but still might be useful if you're working with a lot of material and
> don't want to clear the HD space for a 100GB video clip.
>
> --Tim
>
> Richard Wentk wrote:
> > At 11:10 06/12/2004 -0400, you wrote:
> >
> >> That's very helpful. I had completely overlooked the consideration for
> >> NTSC
> >> or PAL. This piece is written with a European performance in mind.
> >>
> >> To Clarify:
> >>
> >> When you say "save the file uncompressed at the working audio rate",
what
> >> type of file should I choose? MPEG2?
> >
> >
> > Avi 'uncompressed.'
> >
> > Uncompressed saves every frame as the equivalent of a BMP. It's
> > fantasically wasteful of disk space, but you get no quality loss at all.
> > It's probably overkill for your project in quality terms, but it's also
> > the fastest and most transparent way to get video out one piece of
> > software into another without making any assumptions about what format
> > it needs to be.
> >
> > You could actually export your file from Vegas in any format, but most
> > will introduce some quality loss (not a huge problem here) and will take
> > a fantastically long time to render (much more of a problem, as you'll
> > have to render again in DVD Architect to get the final DVD-optimised
> > MPEG anyway.)
> >
>
>



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