MergeChroma to gain Compression?
Has anyone heard of this line for your AVS Script:
mergechroma(blur(1.3)) It's supposed to gain a little compressibility without affecting picture quality... I tried to find out how it works, but hadn't had much success yet... any experiences? |
I tried it once, couldn't see any difference but filesize went down about one percent. Not much but everything's appreciated. I also use DCTFilter with settings (1,1,1,1,1,1,0.5,0) and gain some extra compression without losing any details.
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I tried it too, but I used the max value for blur mergechroma( blur(1.58 )) .
File size did come down a little with no visual difference. I compared it in two frames with Vdub. Looks like we can crank up CQ just a tad with this :idea: Thanks Jellygoose :D -kwag |
Would anyone care to try this 8O 8O 8O
mergechroma(blur( 1.58 )) mergeluma(blur( 1.58 )) Sample size without the above and bilinear resize: 11,194KB Sample size WITH the above lines AND lanczos resize: 10,099 8O Script here: Code:
LoadPlugin("C:\encoding\mpeg2dec.dll") BTW: If you remove the lanczosresize from the gripsize line, it uses the default bilinear resize and the sample file size is ~9.5MB 8O, but it looses some sharpness. Still, I can't tell a difference from the colors or brightness with the two lines mergechroma(blur( 1.58 )) and mergeluma(blur( 1.58 )) added to the script, but the space saving is humongous 8O -kwag |
Now where is that Canadian encode freak (SG) :twisted: I sure hope he's okay, it's been a long time since he's been here.
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-kwag |
hey kwag, that is fantastic!! A hell of a lot difference ! :D
I tried it too, and it really does help compression! Me personally I don't really like Lanczos Resizer. If I want extra sharpness I increase resolution to 704x576. With this I achieve the same effect, and also blocks are becoming smaller! kwag, with these new settings try to go for 704x480 in resolution for KVCDx3! I tried it, and I only had to drop CQ by 2 compared to the 544x480 resolution! I think it's a better way to get sharpness than applying sharpness filters or using lanczos... BtW Boulder: what is DCT Filter doing? |
I'm not exactly sure since I don't know much about maths :roll:
Here's a link to the official thread: http://forum.doom9.org/showthread.php?s=&threadid=38539 The settings I use are generally recommended, they don't seem to wipe out any details and do increase compression a bit. |
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I tried a clip at 704x480 and 528x480 on my HDTV, and the difference is almost barely visible. I'll settle for 528x480, because now I can raise the CQ 2 to 3 clicks, and that makes a HUGE quality difference specially on static walls and motion object :D I'm doing a full encode again of S1M0NE just to compare my previous encode 8) -kwag |
here is the DCT filter for avisynth 2.07
http://www.jungleweb.net/~sansgrip/DctFilter_YUY2.zip and the suggested settings DctFilter(1,1,1,1,1,.5,.5,0) ***also you are supposed to use the filter on resolutions that are a multiple of 16 |
hi,
my results were the opposite 8O With one minute high motion scene from "the Bourne Identity" (car chase) with bilinear Code:
Mpeg2Source("D:\encoding\mergechroma\test.d2v") with lanczos Code:
Mpeg2Source("D:\encoding\mergechroma\test.d2v") I'll try a sample with Sampler(length=24) next.. |
Hi All,
I did some test with MergeChroma/Luma(blur(1.58)) and sharpening on American Beauty predicted to a CDR-90: [/code] inital-script: Mpeg2Source("D:\Beauty\beauty.d2v") LegalClip() MergeChroma(blur(1.58)) MergeLuma(blur(1.58)) BilinearResize(512,352,39,74,642,426) SpaceDust() TemporalCleaner() Blockbuster(method="noise", detail_min=1, detail_max=10, variance=0.3, seed=1) AddBorders(16,112,16,112) LegalClip() Code:
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Looks to me like this is going to be another long thread :mrgreen:
Yes mfb, the value of mergeluma(blur( 1.58 )) is probably too high. Next step is to play with that value :wink: -kwag |
Here's what I've been playing with:
Code:
mergechroma(blur(1.58)) This is the script I'm currently using to test, and the results are really awsome: Code:
LoadPlugin("C:\encoding\mpeg2dec.dll") My new sampler went down from 14,844KB to 13,085 with almost no visual difference. Now that's a lot in terms of quality/size for a two hour movie :D Edit: A couple of test clips follow in the next few minutes... -kwag |
Here are the tests:
With filters mergechroma(blur( 1.58 )) and mergeluma(blur( 0.8 )) : http://www.kvcd.net/film-chromaluma.m1v file size 460KB Without filters: http://www.kvcd.net/film-no-chromaluma.m1v file size 503KB -kwag |
Kwag,
:) i was waiting if someone post his opinion........... :roll: i download see the your samples in power dvd,zoomplayer and wmp7.1 and can't see diferences! you see any? :? :?: |
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Code:
LoadPlugin("C:\encoding\mpeg2dec.dll") -kwag |
I found the first sample of S1MONE w/mergechroma and luna a wee bit too blurry- maybe slightly lower settings can help me- but that's damn good compression!!
btw- you might find this script helpful for comparing m1v clips: Code:
# Compare .m1v clips |
:wink: @ Kwag and "friendalunit"
really good....and thanks for scripts! ps: :evil: now i'm mad. my last beer broke the ring..... searching for a :hammer: to open this! |
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Now that's one more for my toolbox :D. Here's the one I've been using: Code:
clip1 = directshowsource("k:\film1.m1v") |
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