Credit Roll Throws Artifacts?

Grazie wrote on 6/10/2004, 1:23 PM
Okay, last year I shot and edited a Community Project. All went well, client happy. I got paid.

I saved this to miniDVD tape. Fine. It plays fine. It loads back into V5 fine .. and plays beautifully.

Now I want to make a DVD from it. So I load it into V5 and create a MPEG. This MPEG2 I use in DVDA2. The previous, rock-solid no-problem white on black credit roll produces nasty artifacts and really silly things in the final DVD. I can preview the MPEG2 and I can't see any problem. I've even got "other" credit rolls, albeit light colours and little contrast . . this is silly . . .I can't be thinking this is what it is .. . black and white creates problems? It's a finished movie? I'm only creating an MPEG2 from a capture 28 mins of DV-AVI?

Well I've taken my own advice I've give others and am now producing a PAL-AVI just so I can then CONVERT to MPEG2 - reeeeeally sily . .

Anybody know of this one?

Grazie

Comments

Grazie wrote on 6/11/2004, 3:41 AM
Answer? Constant Bit rate . . 8000 does it .. created a new Template with it in it . .

. . Peter Jefferson on the DVinfo Vegas Forum helped ..

Grazie
Grazie wrote on 6/22/2004, 3:37 PM
Well, it wasn't the bit rates . . .it was simpler than that .. I did, as I've done previouosly, burnt a "test" platter in DVD+RW . . yes folks ot was the RW media not coming "shining" thru! realised this as I thought I'd "waste" a proper DVD-R .. hey presto it worked! No artifacts . . works perfectly . . DVDA2 is the Dog's Bo££ocks!

Grazie
farss wrote on 6/22/2004, 3:55 PM
A lot of problems with DVDs can be atributed to a combination of two factors. Sub standard player and lousy media. One of those by itself isn't so much of a problem but put the two together and you may have grief.
Cheap DVD +/- media may seem to play fine, there's an awful lot of error correction built into the spec. But you add in high bitrdate encodes and not so flash decorders and things get messy. The hardware is now having to perform lots of error correction and decode at it's bandwidth limits to boot. The result would appear to be that the decoder cannot keep up so you get skipping or incorrect decodes giving nasty artifacts. I've also seen lots of problems with the color sampling on cheap players run at max bitrate as well.
The players SHOULD be able to handle the max bitrate and do the error correction as well.
Grazie wrote on 6/22/2004, 10:57 PM
. .. so, am I correct in my assumptions or not? - G
farss wrote on 6/22/2004, 11:03 PM
Well by elimination if it works fine with any form of media then there's nothing wrong with the source video or the encoding or authoring. Just leaves the media and the player.
Grazie wrote on 6/22/2004, 11:08 PM
Cheers!