Blocky Result

[Ripe73]

Hi!!!

I dont know if this is a GKnot question but used GKnot and tried to ripp Me Myself & Irene on 2cd(it compress bad) with DivX 3.11.I used resolution 576x304 Bicubic Resize,128MB ABR and first pass size is 1755MB.Then i did a second pass manual with bitrate 1531 but the result was not so good with this blocks on walls.I believed it would go well with this high bitrate and a first pass size of 71% and a not to high resolution.I checked if there was to many keyframes in a bad scene but it was not.

So my question, is filter the only way out of this or something else to try?

What cause this blocks?Is it the motion in the noise?

[EDIT)
Its not a playbackproblem other movies have come out fine!!!

Thanks

[Ripe73]

I guess i have to use a temp.smoother filter that is the only way,i hope!:)

[Demone]

1)Ur NOT getting 100%: try to increase bitrate change resolution etc.

2)Ur getting 100%: the only way to get rid of those blocks, IS TO FORCE THE CODEC TO DONT COMPRESS, and u do it sharpening the 'scene'.
I usually use 1.5-2.0 in bicubicresize function.

[Ripe73]

Originally posted by Demone
1)Ur NOT getting 100%: try to increase bitrate change resolution etc.

2)Ur getting 100%: the only way to get rid of those blocks, IS TO FORCE THE CODEC TO DONT COMPRESS, and u do it sharpening the 'scene'.
I usually use 1.5-2.0 in bicubicresize function.

Hey!
1.well,one bad scene is encoded with DRF2-3 that should be good.

2.How can a Higher DRF give better result?

[Demone]

no DRF problem here.
If u get blocks its cause in that spot on the scene there r similar
colors, and here the codec compresses more, so u get little bits in that point. U must MANTAIN the grainy (I hope u noticed that in DVD), that way u force details in the background.
Logically, doing that way, you end up needing more bitrate so I suggest u to reencode only these scenes.

[Ripe73]

But if this scenes are encoded in DRF2 that means the best i can get it doesnt matter what bitrate i use.I have read that and WEF told me that once.

[Demone]

NO. Because resizing the image u actually blur it a bit, so u lost
pixels and that grainy. So u must sharp it a bit to reconstruct
(not entirely :)) some lost sharpness

[Ripe73]

okey!!

But know im´encoding the movie again with temp.smoother 2 before resize and with a higher resolution.That will give better overall quality

But thanks for the tips:)

[LotionBoy]

uhm, sharpening a movie leads to more encoding artifacts.

LotionBoy

[Ripe73]

The new settings with temp.smoother 2 look worse i think its best to have a low resolution and choose bilinear or soft bicubic

[Demone]

U cant use temporal 2 cause will be worse !!!For a perfect quality u must give right bitrate to reach 100%, after if u still have those blocks u must modify increase the bicubicresize sharpening value

[Ripe73]

edit