@Kwag,

Here's an interesting link from Doom9 where SansGrip started a
post about Psychovisual:

http://forum.doom9.org/showthread.ph...t=psychovisual

-black prince

Now we have to double check that the file prediction is still consistent with this GOP. I'm currently encoding "K-19" with GripFit ( ) at 528x480 with 1-24-4-1-24 + BETA-1a matrix, so I'll post tomorrow if the predicted/actual size are on target.

-kwag

Kwag,
and for (320 wrong)352x240 lbr?
about matrix,gop,cq or cq_vbr,high quality?

if my player plays svcds,than should play skvcds?
i never do skvcd!

thanks in advance!

editing:
is 352x240!

You mean 352x240 right
The above GOP should apply too. Need more testing. Try it out It should play SKVCD too. The only difference from SKVCD to SVCD is the resolution, where SVCDs are 480x480 and SKVCD is 352x480 ( Half D-1 resolution, or CVD resolution )

-kwag

I'm currently encoding "K-19" with GripFit( ) at 528x480 and the test GOP 1-24-4-1-24 + BETA-1 "Notch" Matrix. This is what the movie will look like on one CD-R: http://www.kvcd.net/k-19-small-samp.mpg

-kwag

Kwag wrote:
"You mean 352x240 right "

yes,of course...... :tongue2:

thanks,i try!

Hey, don't worry jorel, I do that all the time too

From Kwag "I'm currently encoding "K-19" with GripFit( ) at 528x480 and the test GOP 1-24-4-1-24 + BETA-1 "Notch" Matrix. This is what the movie will look like on one CD-R: http://www.kvcd.net/k-19-small-samp.mpg"

do you mean BETA-1 or BETA-1a "Notch"?

very good....clear!

"do you mean BETA-1 or BETA-1a "Notch"?"
yes, i ask like syk2c11.

Sorry, it's Beta-1a "Notch" Matrix.

Movie encoded. Final file size was ~4% lower because my sample size was also ~4% lower
So ratio is correct and prediction is valid

-kwag

Well, I just finished running samples from Death To Smoochy (DVD 16:9 1h49m). Here's what I did:

CQ original GOP original matrix
CQ new GOP original matrix
CQ new GOP beta-1a matrix
CQ experimental GOP beta-1a matrix

and the same combinations of GOP and matrix for CQ_VBR mode.

Result:

The experimental matrix caused a huge drop in CQ level, from 48 for new GOP beta-1a to 39. To be honest it looked like I had dropped the CQ that much, with significantly more Gibbs and blockiness. The artifacts at CQ 48 are barely acceptable (I'm going to do a two-disc encode as well, just in case), but at CQ 39 they're definitely not acceptable for a one-disc encode.

The experimental matrix increases CQ_VBR compression greatly, causing a jump in CQ_VBR level from 7 for new GOP beta-1a to 11. All CQ_VBR encodes looked far worse than the CQ versions.

Overall I prefer the new GOP beta-1a sample. It seems to be about the right balance of compression and artifacts, blocks and Gibbs.

Hi SansGrip,

You mean the 1-12-1-1-24 or 1-24-4-1-24

-kwag

Sorry... By "experimental" I meant 1-24-4-1-24. By "new" I meant 1-12-1-1-24. I should've been more clear .

@Kwag,

Just finished "Signs" using GOP 1-24-4-1-24, Q-Matrix Notch Beta-1a,
and CQ=100. This was for a 2 CD encode + audio. The results were
GREAT!!! Flashing was very subtle this time and from 2+ feet
from TV not noticable at all. There was Gibbs, but no worst than using
CQ_VBR. File size was smaller than before (e.g. 1.4GB vs 1.5GB) with
old GOP and Q-Matrix. The picture quality was Excellent!!!
Gibbs was slightly more noticable than before, but viewing 2+ feet
away from screen it was hardly noticable unless you were looking
for it. I'm encoding another full video with the new GOP and Q-Matrix
to make sure this was not just a fluke. I'll let you know how it
turns out

-black prince

Yes , I just made a couple of screen shot comparisons with Vdub, and I can see the Gibbs. So back to the drawing board. I won't be satisfied until I find the correct GOP that doesn't "flash" (like 1-24-4-1-24) and no more Gibbs than the reference sample (like 1-12-1-1-24) or any reference sample made with 1-12-1-1-24.
So back to more tests here .

-kwag

Would experimenting with MPEG-2 do any good as SansGrip said the I-frames would be less blocky? I know it produces bigger files than MPEG-1 but as we've all seen here, it's only a matter of time before the filesize gets shrunk down

i lost something?

now we are testing
the BETA-1a notch :
8 9 12
9 10 14
12 14 18

or not?
correct it please!

Yes, but the primary focus right now is MPEG-1, so we can target to most standalone DVD players. I assume that for MPEG-2, we're going to wind up with another GOP . As far as the matrix, it seems to do a good job as it is with MPEG-2
But as soon as we get the MPEG-1 stabilized, which I hope is soon , then we can tackle the MPEG-2 optimizations

-kwag

Yes, and I think that's the best and final matrix ( for a while ).
Really, I hope we freeze that matrix now, and that will be the new KVCD v2 Q. Matrix. Hopefully it will stay that way for a long time.

-kwag

really good Kwag, i do now some more tests with 352x240 lbr!