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View Full Version : XviD Properties shows "Video Sample Size: 16 Bits"


jwu42
3rd February 2003, 17:32
Looking at a few others rips from some of the groups I notice theirs show 24 bit and look much better.

Currently trying Koepi's latest unstable release (XviD-26012003-1) and using b-frames per iago's guide and GMC/CM. The source is The Sopranos Season2 at 576 x 320 (GKnot shows .186)

So the big question is how to get 24bit instead of 16bit? Could this be the reason the quality doesn't look as sharp at 200% (blockiness around the edges of people).

On a seperate issue - is anyone able to use ffdshow with the latest build. I read when vxid is checked it crashes any player, but when i uncheck and use ffdshow I get horendous blockiness and have to use the default xvid filter.

TIA for you help!

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Some system info FWIW

EPoX 8k3a+ with 1800+ (OC'd to 2400+)
512MB Corsair XMS3500
Win XP Pro SP-1
Gainward GF3Ti200 with 40.72's
Sony G400

iago
3rd February 2003, 19:23
@jwu42

If you had used VirtualDubMod with AviSynth 2.5 beta (which is the way to go actually) to encode using the 26012003-1 build, the output would even be 12bit ;).

I don't think that would be a measure for quality. There might be something else going wrong either in the encoding or decoding side on your system.

Koepi?..

regards,
iago

bilu
3rd February 2003, 20:27
Could it be the colourspace?

RGB24 = 24 bits
YUY2 = 16 bits
YV12 = 12 bits

Then again, MPEG-* doesn't encode at RGB24 :eek:

Bilu

Koepi
3rd February 2003, 20:41
all videos in mpeg* are 12 bit (=yv12) internally.

what is shown in the properties doesn't matter. it's fake.

jwu42
3rd February 2003, 20:44
Being a newb I still use GKnot (DVD Decrypter and DVD2AVI) / VirtualDub / Nandub (for audio).

I happened to notice in dvd2avi that rgb shows as 24 bit.

I want to learn more about Avisynth and Lanczos resize - been reading up on it but little is making sense.

Trying to update DVD2Avi crashes GKnot!

Last dumb question (for now atleast) - when I installed avisynth(2.0.7) - where did the files go? I assume it is just a .dll ?

Thanks in Advance

jwu42
3rd February 2003, 22:21
@Koepi -

Thanks for taking the time to answer.

I was looking for answers and the one thing I noticed was a few of the better looking rips I had found (read downloaded) showed 24 bit and the reason for my question.

As iago suggested I am trying VDubMod and AVISynth 2.5. Not sure i am doing this properly, but we will find out soon enough ;)

-h
3rd February 2003, 23:18
The bitdepth stored in the AVI header does not effect anything. You could put 48 bit there if you like.

-h