Does Premeire Pro work in YUY2 instead of RGB?

WesW · Post by **WesW** » Mon Mar 03, 2008 11:23 am

Looking at the project templates, it seems this way.
If so, is there anyway to keep DGEncode from converting the vobs from YV12 to RGB? I think these color conversions are killing my quality.
If there isn't any way, are there other alternatives for ripping which keep the files in YV12?
Thanks

WesW · Post by **WesW** » Mon Mar 03, 2008 12:09 pm

Here is the avisynth code I used to rip the vob segements I wanted. (I was combining audio with the video as well.)

MPEG2Source("C:\GHOST_IN_THE_SHELL\VIDEO_TS\VTS_14_1.d2v")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\NicAudio.dll")
video=MPEG2Source("C:\GHOST_IN_THE_SHELL\VIDEO_TS\VTS_14_1.d2v")
audio=NicAC3Source("C:\GHOST_IN_THE_SHELL\VIDEO_TS\VTS_14_1 T02 3_2ch 448Kbps DELAY 0ms.ac3", Channels=6)
AudioDub(video,audio)
AssumeFieldBased()
deint=TDeint(mode=2,mtnmode=3,blim=100)
Deen("w3d",3,3,5)

Everything seemed to work alright, meaning that the input file was in YV12 all the way through, but when I tried to open the Lagarith file this code created, it was in RGB! I double-checked to make sure that the configuration was set to YV12. What happened?

Also, am I right in using DirectShowSource to open the Lararith file

Zarxrax · Post by **Zarxrax** » Mon Mar 03, 2008 12:13 pm

I haven't found any way to make premiere use YUV. The colorspace shouldn't really hurt your quality in any noticeable way though.

badmartialarts · Post by **badmartialarts** » Mon Mar 03, 2008 10:08 pm

The more current MPEG2Source's definitely leave the video in YV12, so it must be one of the filters you are using that is to blame (I suspect deen). Premiere on the other hand prefers RGB source (at least up to version Pro 2.0, I haven't played enough with Premiere Pro CS3 to notice it being bad with colorspaces yet), it can convert but sometimes does a particularly horrific job and you get a whole lot of color noise where you expected a video to be. Colorspace conversions really shouldn't cut a lot into quality anyway as long as you aren't doing them back and forth needlessly (try to set it up that you do all the YV12 stuff first, then drop it into RGB for Premiere's digestion.)

WesW · Post by **WesW** » Mon Mar 03, 2008 10:24 pm

I tried the same script, only I saved it in Huffyuv, and it stayed in YV12.
Therefore I believe that the vdub color configuration doesn't work.
I also tried a commercial ripper, and for Lagarith it didn't even have any color settings, and it too converted the color to RGB.
From what I can tell, Lagarith can accept any color type, but will always automatically convert to RGB.

BasharOfTheAges · Post by **BasharOfTheAges** » Mon Mar 03, 2008 11:08 pm

What are you basing these quality deficiencies on? Vdub's preview? If so, do you have it set to display the file's native bit depth or is it still set to a low-quality preview?

WesW · Post by **WesW** » Tue Mar 04, 2008 4:00 am

BasharOfTheAges wrote:What are you basing these quality deficiencies on? Vdub's preview? If so, do you have it set to display the file's native bit depth or is it still set to a low-quality preview?

I guess I was wrong about them killing the quality. It turned out I had the wrong syntax for the way I was attempting to use TDeint. I was judging the quality by how the rips looked in Windows Media Player.

As far as the color conversions, I'm basing that on which filters work and which don't, mainly TDeint, which requires YV12, and Smooth Deinterlace, which won't work in YV12.

JediNight · Post by **JediNight** » Thu Mar 13, 2008 5:18 pm

I'm not entirely clear what you've been doing, but if it helps: If you're using VirtualDub it will convert to RGB unless you set it to Fast Recompress. All VDF filters in VirtualDub itself also use RGB colorspace as well.

WesW · Post by **WesW** » Thu Mar 13, 2008 11:18 pm

JediNight wrote:I'm not entirely clear what you've been doing, but if it helps: If you're using VirtualDub it will convert to RGB unless you set it to Fast Recompress. All VDF filters in VirtualDub itself also use RGB colorspace as well.

I should have been using Fast Recompress- I can't remember for sure now. I don't guess it really matters if they get converted, if PP2 converts them to RGB anyway.