Re: video conversion


Subject: Re: video conversion
From: Richard Wentk (richard@skydancer.com)
Date: Tue Dec 07 2004 - 10:41:43 EST


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.)

>With regards to the audio resolution, I am using multiple sound
>sources..some of which are at 44.1k but I always export at 48. Usually to a
>wav file. Is there a better option? there are many file types to choose
>from. i.e. mpeg 1 and 2. Is it not a good thing to work at one audio rate
>and eport at a higher one?

It's always best not to change audio rates as this loses quality. But it's
sometimes unavoidable, especially with video which tends to use 48k for
audio. The main rule is to convert rates as few times as possible.

>Then I have been importing the audio portion into the video software. At
>this point, the audio and video are combined and rendered to a file format
>that can hopefully be burned as DVD video. I will render it uncompressed
>(mpeg2?)as you suggested then try authoring with DVD architect.

That about sums it up, yes.

Richard



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