DV/HD-Lower math

vitalforce wrote on 9/14/2006, 2:13 PM

I have a feature done in DV-avi (shot with a Panny DVX100 in 24p, captured via Scenalyzer), V6 color corrections & etc. added, then rendered to MPEG-2 for DVD.

I suspect there would be no benefit to rendering the corrected DV-avi from the timeline to an HD format in Vegas, then to MPEG-2 for DVD. Instead there would be a quality hit. Right?

Comments

Jay-Hancock wrote on 9/14/2006, 2:27 PM

Why would you want to do that? Think of all the color space conversions you'd be putting it through...

vitalforce wrote on 9/14/2006, 3:19 PM

I was postulating from the notion of rendering to a higher resolution and making 'room' for the correction operations but see your point. Just a thought. I never fully understood at what point in a render Vegas worked in a 4:4:4 color space since that's not MPEG-2's number.

GlennChan wrote on 9/14/2006, 4:56 PM

Vegas (as far as I know) always renders in 4:4:4 8-bit RGB, since that is what the video for windows architecture does. RGB implies no chroma subsampling... hence 4:4:4.

Technically, it would be desireable to decompress the DV, apply chroma interpolation (or better techniques), apply the filters, then render to MPEG-2.

In practice, that would mean that you'd have to apply the Chroma Blur to the mediaFX of all your DV clips... this would be a tedious button-pushing process. I would just apply chroma blur to the video preview FX instead.