Quality issue

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Quality issue
by Rory ORear on Jun 24, 2012 at 3:19:56 am

Hi all,
I just made an SD DVD and the quality is very pixelated in the build. I can't figure out why, as the files are Pro Res 422 and look great before I make the DVD. It's actually quite odd, because one file looks ok. I'll explain: there are two video tracks. One is the movie (it is a short five minute film) and the other is a three minute track with includes a quick "gag-reel" shot of the actor, followed by a number of still images played back to back (all one single MOV file). The shot of the actor is the only thing on the DVD that looks completely normal and fine. The still images, which contain text, are so pixelated they are unreadable. The actual 5 minute movie is also very pixelated.

The menu is not quite so pixelated, but not very good looking either. The thing is, they were ALL Pro-Res 422 (HQ) files that I put into DVDSP and they all looked completely fine from beginning to end.

I have tried a bit rate of 6.8-7.7 and I've even tried bumping it up higher. Every time I get the same result.

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Re: Quality issue
by Daniel Ludwig on Jun 25, 2012 at 8:18:14 am

hi Rory,
there are several possibilities, why your video could appear pixelated.

- first of all it depend on your still-imnages resolution. normaly still-images are high-res-shots, they far to sharp for televison and have RBG-color-range.

- there are some video-codecs that normally have problems with still-images but PRO RES should work good with it

- besides sharpness and RGB-color-range it would be good to put some grain/noise to the picture, so the encoder has more information for encoding. to clear pictures could cause blocking artefacts as well.

- encoding your video using DVD SP encoding engine is ok, but I would advice to use compressor instead.

- allways take care about field-dominances.

cheers

danny

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Re: Quality issue
by Kylee Wall on Jun 25, 2012 at 1:22:04 pm

To reiterate Daniel, I would first try taking the ProRes files into Compressor and making your DVD files there (there's a preset, it'll make you an ac3 and m2v) and use those in DVDSP. You don't want the DVD authoring software to do this trancoding for you.

blog: kyleesportfolio.com/blog
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