Re: Cinepak, Sorenson, and MPEG are lossy...

Halstead W. G. York (halstead@journeyman.com)
Thu, 01 Oct 1998 15:26:27 +0000

I find that in general, DV doesn't transcode very well to MPEG. The main
issue is that DV is a 4:1:1 codec and the MPEGs are 4:2:0 codecs. most
direct digital transcodes leave you with a 4:1:0 colorspace image that has
almost no color sampling. The image can look blocky and poorly (both over
and under depending) saturated. DVCPro 50 and Digital-S both work much
better in a transcode situation due to their 4:2:2 colorspace.

Halstead York
Journeyman

Video for the Digital World

Ross Jones wrote:

> >Cinepak, Sorenson, and MPEG are lossy, compressed content DELIVERY
> >formats. They are very small, but for that reason they are not suitable
> >for editing. You should edit your clip in a EDITABLE format like
> >Motion-JPEG or the Media 100 QuickTime codec and only dump to a
> >compressed delivery format like MPEG as the last step in the process.
> >MPEG cannot be edited, so you would have to make any changes in your
> >Media 100 and then re-encoder to MPEG.
> >
> >Thanks,
> >
> >Chris O'Leary
> >V.P. of Marketing
> >Heuris
>
> Hey Chris any take on whether DV Frame Mode will transcode any better?
> What is the general consensus on sending DV out to MPEG encoders? Looks?
>
> Thanks,
>
> Ross