Project: VOB files - DVD2AVI or TPGENC de-multiplex?

[Cunhambebe]

I have a project ready to be rendered, but I've got a problem with VOB files previously processed with DVD2AVI. Let's see it:
Before burning my project I found out a problem with my final MPEG file (m2v). I've rendered a project made up of some jpeg files and some shots from dvd movies (VOB files - absolutely legal material). First of all, I used DVD2AVI to make those VOB files as AVI ones. Later, I put these AVI files on Vegas timeline, but I found out the final result was very poor: as soon I rendered the project as a whole mpeg file (or m2v using TMPGENC), those parts that came from avi files, if very bright, showing the sun or bright lights, had a very poor resolution (at least on my pc monitor screen - haven't tested on a tv yet).
Question: Why is this happening?
Would that be better instead of encoding (or whatever) from dvd to avi first, to have TMPGENC to demultiplex the VBO files to m2v and then multiplex the m2v files as MPEG to use them on a timeline? When I render the whole thing as MPEG or m2v, would that make the final video resolution better? I'm trying to do so. What do you all think?
Thanks in advance.

[Cunhambebe]

It seems everybody went to the beach. Here's a pic to show u what's happening..Let's see if I can upload it here...

[Cunhambebe]

[teegee420]

What I would do is simply save the project in DVD2avi, install VFAPI Reader, run VFAPIConvEN.exe, add the d2v project file and click convert. This will create a fake avi that will act as a frameserver. I've never tried it before but you should be able to open the avi in Premiere with no quality loss.

[Cunhambebe]

I've already tried that. The result is the same one you can see in that pic. I suspect the problem is with the mpeg encoding itself. Look at this pic. It is part of the same final MPEG project file, but on Vegas timeline it was a still jpeg file with some movements (so, it's not a VBO to AVi or whatever). Look at those banding again.

[BJ_M]

you get that from low quality 8 bit color and/or a number of other factors (one of which is using compressed material as source material) ..

you can add dithering to your project and it can remove it in final render .. you may have also add very very small amounts of blur or a median filter ..

ussually adding a blue channel dither will clear it mostly up ..

add green next if required and red last ..



why its nice using float or 10 (or 16!) color ....

[Cunhambebe]

Hi there!

"you can add dithering to your project and it can remove it in final render..."
"you may have also add very very small amounts of blur or a median filter ..

ussually adding a blue channel dither will clear it mostly up ..

add green next if required and red last ..



why its nice using float or 10 (or 16!) color ...."
Can you please tellme how to do that?
Thanks...I've spent the whole weekend trying to fix this.

[BJ_M]

why its nice using float or 10 (or 16!) color ....

well you cant do that unless you created the source material yourself - and have lots of room .. a project we are rendering now in 4k resolution at 16bit per channel is 50meg PER FRAME !

dithering is adding noise more or less to something .. it is used in audio and in video and in graphics ..

it is easy to do in vegas -- just put a copy of the project on the top timeline (create a new one) , make it only 1 channel color , and add some 1 pixel noise to that channel (make a noise gradiant in photoshop even if you want only sky - or do it in vegas full frame or use a mask)--- then add that back the main project in a small amount ..

[BJ_M]

looking at the first pic above -- you have blur in there also from bad de-interlacing ..

[BJ_M]

as i told you in a pm .. what you are using to decompress your mpeg can play a big factor in quality ..

changing color space also - not good ..

[au7usa]

If he's frameserving with VFAPI won't it revert to RGB24, and loose some of his color range. Wouldn't that cause banding?

[BJ_M]

it doesnt lose color range - but it is a color space conversion , then back again to YUV ...

[JeffroTa]

Why not just use VOBEdit to demux the VOBs then work with the elementary streams. Seems to me that in converting to AVI then back to m2v you are doing an extra encoding step, and losing quality in the process, that you don't need to.

[Cunhambebe]

Thanks to all for taking time to respond.
I AM LOST. After all of this, sorry, but I am lost. I thought I knew a little bit about video, now I know I was mistaken.
In fact, an user told me to open the AVi file with TMPGENC and inverse telecine (24 fps - 30 flicker prioritized). It works. All those bandings were gone. The problem is:

1. The guide above works for single AVI files rendered as M2V with TMPGENC (cannot re-render again thatt the problem IS back);
2. Rendering the project in Vegas tru Debugmode and opening it with TMPGENC to follow the same steps, DO NOT WORK AT ALL (same banding on the final result);
3.Render Vegas timeline as a whole AVI with Huffyuv and then re-render again with TMPGENC shows the same result as above = does not work, same banding.

I would please like you to tell me how to do all this in a simple way:
I've learned how to encode from VOB to AVI tru vfapi. Final AVI is excellent. I just cannot re-render this final AVI as MPEG2 without those banding. I think it's uselles to convert from VOB to AVI if we cannot re-render this AVI as MPEG2 without those banding. There must be a way to fix this.
WHAT DO U GUYS DO TO FIX THAT?

Thank you very much for the valuable help