TMPGEnc YV12 question

[gastorgrab]

Been reading these posts long enough, its time i submitted something!

I've read numerous guides about the process, both here, and at other sites. Although the audio and video are in perfect synch, i occasionally end up with a slight banding effect, that i'm guessing comes from a color conversion. (according to everything i've read)

I've been using DGDecode (DVD2AVI) to frameserve my DVD rips to TMPGEnc and am wondering about colorspace. I know that TMPGEnc wants RGB as its input, but in the instructions for AviSynth it tells the user that XviD, or DivX can decode YV12 by just adding a new entry to the registry.

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32]
"VIDC.YV12"="xvid.dll"

My question;
Does TMPGenc do a double conversion? (Is the YV12 input converted to RGB, and then back to YV12 when i encode to MPEG-2?)

[erratic]

YV12 FAQ -> read question 10.

The color conversions:

CCE: YV12 -> YUY2 -> YV12
TMPGEnc: YV12 -> RGB24 -> YV12

[gastorgrab]

Almost what i wanted, but its my fault for not being more specific.

The article also says:

"Neither CCE nor TMPGEnc can use YV12 input since Windows has no internal YV12 compressor."

Isn't this what the line; "VIDC.YV12"="divx.dll" is for?

I'm not using the line "ConvertToRGB()" The file loads into TMPGEnc as YV12. I also opened the AVS with VDubMod;



The file looks clean when previewed with TMPGEnc, so i guess what i'm asking is will TMPGEnc allow Windows to decode YV12, or will it re-interpret everything it sees? (The only comparison i can think of this time is VDubMod "Fast-Recompress" vs "Full-Proccessing")

Your link was still helpful though, Thanks!

[erratic]

I quote Wilbert from this thread:

CCE requires YUY2 and TMPGEnc RGB24. If you don't feed it with the correct color format, two things can happen:

1) It works fine, meaning that Huffyuv, DivX5, XviD or some other codec is doing the appropriate conversion for you.
2) It doesn't works (gives a black screen for example). Could mean that some crappy codec is doing the conversion for you.

[gastorgrab]

Now that's what i was looking for.

Thanks again!

----------------edit-------------------

So here's how i set up my template for DGIndex: