Blockng shows in encode, increase bitrate or deblocking?

[20/20]

My encode shows visible blocking in scenes where theres lots of smoke and big explosions.

What should I do? Icrease the bitrate when encoding?
Or set MP2-deblocking on (feature in Megui/AVS-creator)?
The line with mpeg2-deblocking in AVS will ook like this:

DGDecode_mpeg2source("F:\source.d2v",cpu=4)

picture:




it's actually alot worse than the pictures show. You have to see it in motion I guess.

[manono]

What's your output format? Those pics look suspiciously like they're from an AVI, and MPEG-4 is notorious for those effects.

[20/20]

Output: x264

Input: MPEG-2 (LD-source VOB's)

[guns1inger]

What bitrate are you encoding at ?
What do they before pictures look like ?

[20/20]

What bitrate are you encoding at ?
What do they before pictures look like ?

Average bitrate = 791kbit/s (-crf 21)

Preceding pictures look very nice at this bitrate. Just when there is lots of clouds or
a big explosion and all the debrie is falling. You see these artifacts.

Source video doesn't contain this artifact-blocking.


I noticed x264 will have lots of this artifacting in scenes with there is lots of smoke or clouds or snow etc.
Dunno why this is. Still scenes and less action scenes look awesome and sharp.
As if x264 was created as a "lowmotion codec"

[guns1inger]

That is a low bitrate for that resolution. Also, smoke and clouds, high action etc are all hard to encode and require as much bitrate as you can afford to give them.

[20/20]

There been a few discussions about this on doom9

Seems this blocking artifact is inherrited with x264 as it can remove too much noise
and reveal these blocks or whatever.
Too much pre-denoising on a source can also cause x264 to behave more badly like this.

Simply raising the bitarte won't help much. As countless other things