Premiere Pro 1.5 and YV12 (Lagarith/HuffYUV) vs. RGB24/32

[Guld_Bowman_02]

I read through the guides and googled around and I still don't have a clear picture. I understand these facts...
a) DVD's native color space is YV12
b) The recommended codecs to preserve YV12 info, i.e. lossless, (after ripping and aviSynth) is Lagarith or HuffYUV c) An alternative to YV12 (for compatibility's sake) is RGB24 [no alpha channel] or RGB32 [with alpha-> larger than same file in RGB24]. These files will be significantly larger than their YV12 versions, but (according to the guides and I've found this to be true) what you put in, provided you export as an uncompressed RGB24/32, is what you will get back.
These are tried and true facts, which leads me to wonder....

1) If I save a clip using lagarith or Huffy in YV12, how does
a) Premier Pro 1.5
b) Vegas 5.0
c) After Effects Pro 6.5
interpit that file when you import them. These files have been IVTC'ed, assumeFPS(24)'ed and cleaned up a little, before hand with aviSynth.

From previous research, I can only assume that After Effects, (the version mentioned above) like most/all compositing-graphics software, pretty much only deal in the RGB32 realm (no YV12, YUY2, etc. clips). So, if I were to make am AMV that was going to use After Effects, then my source media should be converted to RGB in aviSynth to keep all files in the same colorspace and reduce headaches. The guides were clear enough to mention that sometimes 2 colorspace conversions may have occur...
1) DVD[YV12]->RGB[edit/compositing/export of final vid]
2) final vid->YV12 for compression [Xvid, TMPEG, CCE, ect.]
(this can also vary b/c some encoders only deal w/ certin color spaces)
Feel free to correct me on this if I am wrong.
But, in regards to Premier and Vegas, what effect does using media encoded in the YV12 [Lagarith] or YUY2 [Huffy] have on my final export from the editor, provided that both editing programs were set up according to the guides? I am aware of frame serving into Premier, but for me, making clips is a better but longer workflow b/c i got plenty of drive space. Any help is greatly appreciated...

[AbsoluteDestiny]

They will upsample your YV12 footage to RGB (or YUV 4:4:4 in premiere pro which is essentially the same)

[Sir_Lagsalot]

Basicly, the color conversion will happen as follows: DVD YV12 video -> YUY2 -> RGB for editing -> final color space. It doesn't matter where (or even if) you stick Huffyuv/Lagarith in the process in terms of quality; the color space conversions will happen anyway, and no information is lost with either codec, so you should end up with the same results (AviSynth, Huffyuv, and Lagarith use the same algorithms to upsample video). Finally, if you are still worried, both Huffyuv and Lagarith have an option to "Always suggest RGB" when decoding, which will cause the codecs to output RGB video unless explicitly asked not to by what ever program is using them.

[Guld_Bowman_02]

Sorry for the delayed resposne....
I was experimenting with Avid free DV and it seems like it absolutly hates everything except quicktime, uncompressed RGB, or some incarnation of DV. So, once I got my avs into VirtualDubMod, I saved the clip using Lagarith (YV12), opened that avi in Vegas 5 (which I plan on becomig more familiar with), render as a QT movie using the Avid DV25 411 codec for import into Avid. Once edited, export as a QT Reference file and open that with QT (retail version) and export the file uncompressed RGB for Xvid encode in VirtualDubMod and/or TMPEG. I know that this is a long and drawn out process, as there are much easier and more direct solutions (i.e. initally save an uncompressed RGB avi for import into Avid, but this way saves space, once you have the QT DV files and delete the Lagarith sources). All I can say is that it's a hell of alot of work just to be able to use Avid and what sucks is that the DV25 codec is murder on titles.... But, thanks guys for the feed back!!