last ten minutes become awfully blocky

[mindfall]

I'm trying to encode this film to XviD, but the results are terrible.
First I went for a 2 cd set with 2 audiotracks. The biggest part of the movie was good enough, but in the last 10 minutes it suddenly becomes *extremely* blocky until the end, so much that it is impossible to recognize anything.

I know the end scene is a hard one - low contrast, bad contures, all drenched in fog...
So I tried again with a 3 cd job, reduced resolution and only one audiotrack.
Result was a 800 mb movie with terrible blocky picture throughout the whole film...

What's strange with the first encode is that the blockieness suddenly kicks in during a scene that starts clean and doesn't change it's optics. And after the foggy showdown, when the air becomes clear again, the blockiness still stays.

What's going wrong here? I use Gordean's Knot btw.

[killingspree]

sounds to me like wrong 'credit start' settings. most likely you just forgot to reset them after your last encode. this has happened to me too, i'm afraid you'll have to do the encode again, this time, just make sure you update the 'credit start' setting.

the button is on the lower right of the preview window btw :)

hth
steVe
edit: [almost forgot the mod nagging] a bit more of a descriptive title would have been nice! ;)

[mindfall]

That would be a good explanation... though I'm not sure if it is related to credit start, if I understood the buttons right, my version of GKnot doesn't offer an option to do both movie + credits with XviD, it only does so for DivX. I'm very sure I had selected 'no trim'.
But I'm not exactly sure what it really does when credits are set, I'll give it a try.


changed the topic title :)

[killingspree]

Originally posted by mindfall
of GKnot doesn't offer an option to do both movie + credits with XviD, it only does so for DivX. I'm very sure I had selected 'no trim'.
But I'm not exactly sure what it really does when credits are set, I'll give it a try.

that is, because in divx you have to do 2 seperate encodes that are merged again lateron in the process, but xvid has a built in credits encoding function where you can set different encoding parameters for the last part of the movie...


changed the topic title :)

thx

[manono]

Hi-

Check your XviD Configuration to see if you have a Zone Setting enabled to give higher quant, or lower weight, perhaps left over from a previous encode.

[mindfall]

Originally posted by killingspree
that is, because in divx you have to do 2 seperate encodes that are merged again lateron in the process, but xvid has a built in credits encoding function where you can set different encoding parameters for the last part of the movie...
oh didn't knew this.. :o thanks for the explanation. :D

Looks you were quite right with the credit starts... Did the encode again and took care for the credits, this time it worked. :D


Thanks for your help Killingspree and Manono!

[killingspree]

good to see you worked it all out ;)