Annoying blocks!

[Red9]

Hi guys! Me, again, with another question regarding a DVD rip.
Now here is the problem:

First i will put a snapshot from the final rip:

http://img232.imageshack.us/img232/2930/bscap0000um4.jpg

(it's from Godfather Part III)

And my problem is this one:

http://img254.imageshack.us/img254/1252/bscap0001mx1.jpg

Now, how can i get rid of that blocks from the dark scenes (i'm talking about that squares in the red "circle")???

I have already tried some filters for deblocking, but nothing seems to work. Also tried Blockbuster for AviSynth, but all went wrong.
What am i doing wrong!?

I have used DivX 6.8.3 for encoding, Gordian Knot for AVS generation and VD Mod for encoding.!

Thank you so much if you can help me! :stupid:

[Dark Shikari]

The blocks are from the encoder, not the source. Prefiltering a source won't stop it from getting blocky at low bitrates or due to a crappy encoder.

[FlimsyFeet]

Just turn the brightness down on your TV/monitor! I had to tuen my brightness up in order to see what you were talking about.
Maybe someone else knows better than me, but I think the recommendation is that the difference between black and anyhting lower than about 4% above black should not be visible.

[CWR03]

Those blocks are perfectly normal with DivX encoded files. x264 might lessen the effect, but it will be a problem to some extent with any MPEG-4 codec.

[Ranguvar]

I agree with FlimsyFeet on this.

Also, I would suggest using Xvid with VAQ... this should help blockiness in backgrounds. x264, since it has less restricted VAQ and inloop deblocking, will do even better.

[dat720]

CWR03 is correct there... not enough bitrate for your desired quality.

There is also blocking present in the blinds, to fix this with divx all you can really do is up the bitrate!

[DarkZell666]

Just turn the brightness down on your TV/monitor! I had to tuen my brightness up in order to see what you were talking about.
Maybe someone else knows better than me, but I think the recommendation is that the difference between black and anyhting lower than about 4% above black should not be visible.

Same here, the picture looked perfectly normal to me until I turned the gamma up in the graphics control panel. That's what's called lumi-masking IIRC : compressing dark areas more than the rest of the picture (though one could argue a long time about what the "dark" threshold should be :p).

Did you enable something called "psy-optimisation" or "pre-processing" in the DivX options ? That might be the cause, though it supposedly improved the quality of the non-dark areas.

[Red9]

WOW, thanks guys for replying. I'll post pics after i will finish the rip

[RickA]

Greets,

I would also say bump up the bitrate. No sense in my mind to squash a full length movie down to fit on near CD sizes these days. There is almost no detail on the back of his raised hand. Completely smoothed over.

Cheers,
Rick

[Mug Funky]

adding bitrate wont affect blacks as crushed as those...

i agree on turning the brightness down on the monitor. additionally, blocking in blacks is usually only evident on RGB displays working in 8 bits or less. perhaps on a CRT this will be invisible (as they convert YUV to RGB in the analog domain, hence no quantization error).

another option is to crush the blacks even further with a levels call in avisynth. blocks wont flicker on perfectly flat colours, but if there's a little noise or grain in there, the blocks will fly around like crazy.