If you want to uprez from SD to HD, the first step should be converting your
SD material into a solid SD "new master."
I know people say you can't actually improve the quality of something after
it has been shot, which shockingly is untrue as outlined below!
If you convert DV footage (that has already been captured) from the native
DV codec 640x480 (the DV pixel dimension stretches this image back into
720x480 everytime it plays back) and convert it to PRORES HQ or Uncompressed
or Animation at 720x480 and do a side by side frame grab from the original
DV and the new codec, you will actually see a sharper image in the new
codec! Yes, you will actually be able to pull out the FULL information
stored in the clip, as DV uses all of these formulas to "quickly" display
the image, a properly re-encoded version just shows you everything that is
there.
I would then take this new re-encoded file (ProRES HQ, Animation,
Uncompressed) and start your uprez process (whichever you want to do).
Yes, frame rates, aspect ratio and pixel stretching are all part of the
discussion, but starting from the best quality SD encoded version of your
clip is the best way to start.
You may want to blur just one of the channels (R, G or B) once you have
uprez'd it... Just to soften some of the artifacting that becomes more
apparent when it is stretched 4x larger than its original resolution
supports.
Deco
On 6/2/11 8:49 AM, "David Tetzlaff" <djtet53_at_gmail.com> wrote:
> I've had good luck with up-rezed SD original inside an HD project in FCP. It
> depends to some extent on what the footage looks like (more so than the
> quality of the SD format - the stuff I had from from a cheap DV
> camcorder...). If you don't want to crop the SD image to 16:9, I'd pillar-box
> it, but that still involves up-rezing from 480 vertical to 720 or 1080. At
> their native resolution, they'll be too tiny on the screen. Up-rezing
> shouldn't introduce the artifacting Edwin mentions, but there could be other
> issues involved, like frame rate conversion, deinterlacing...
>
> If you're in Final Cut world, the big trick is getting a good BluRay authored.
> DVDSP won't do BluRay, though there's a work around. Toast has a minimal
> BluRay authoring function, but the encoding stinks. If you don't have a true
> BluRay authoring alternative available (I think Adobe will do it on a Mac,
> everything else is on the PC side AFAIK), you'll need that workaround. I have
> it written down somewhere. Let me know if you need it and i'll hunt it down.
>
> For FCP people, a better mobile option, if you can get your hands on one cheap
> as they're now obsolete, is a Toshiba HD-DVD player. DVDSP can author discs
> for that without any special voodoo, and you can write them to standard DVD5
> blanks (just not as much run time per disc at the same settings, natch). 30
> minutes will fit in excellent quality MPEG (more if you use H264, but that
> complicates the workflow a bit). For a program of shorts, this shouldn't be a
> problem.
>
> But, if you break the program into several discs, you could, as Edwin
> suggests, group the SD together and HD together, so you have the SD stuff on
> an SD disc, since the player (HD-DVD or BluRay) will handle either, and
> up-convert it. (A benefit of the Toshibas was/is their superior upconverting
> hardware)
>
> djt
>
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