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gantengx
13th August 2005, 03:26
Hi,

I got a weird problem, I tried to convert my black hawk down dvd to divx using virtualdub 1.6.9,using avisynth,2 pass divx compression (1008kbps each) and i got little noise on the bottom line....

this is my avs file
Mpeg2Source("black hawk down.d2v")
LanczosResize(704,396)
Crop(2,52,-2,-52)

is there anything wrong? i never had this kind of problem before, and yesterday i got the same problem with another movie,but adter i changed the bitrate to 1008 it;s ok.... :(
stephanV
13th August 2005, 08:02
If its not in the preview of the AVS script, you might wanna try another decoder or a mod16 resolution.
gantengx
13th August 2005, 10:39
mod16? what do you mean? how do i use another decoder?
stephanV
13th August 2005, 18:43
mod16 means your resolution width and height must be multiples of 16.

to use another decoder install e.g. ffdshow (preferably) or XviD and set it to decode DivX.
gantengx
14th August 2005, 07:03
is it? but usually the resolution for 16:9 is 640x360 (360 mod 16 is not 0)... but last time i did it it's okay...i'm just wondering about that stupid noise on the bottom...so annonying :( ok probaby i'll try with ffdshow then... thanks
Bathrone
19th August 2005, 12:12
I havent been bothering to resize. If you edit the pixel aspect ratio using mpeg4modifier, that will do it. Ive found xbmc and wmp will detect the par and my display aspect ratio is widescreen. My thing with it is not to mess with it where its not needed - keep the purity of the source as far as possible.
mic
20th August 2005, 03:09
is it? but usually the resolution for 16:9 is 640x360 (360 mod 16 is not 0)... but last time i did it it's okay...i'm just wondering about that stupid noise on the bottom...so annonying :( ok probaby i'll try with ffdshow then... thanks

Generally the most reliable method I've found for w/s resize calculations from anamorphic, is to open the orig DVD in something like PowerDVD and take a snapshot of the window. Import this snapshot into a photo editor, crop, and resize it maintaining aspect ratio -- use those measurements as possible (might have to cut a few extra pixels because of codec size multiple restrictions).

That said, the 16:9 DVD spec does not mean every director feels it suitable. Many (most?) will add more letterboxing, so going by set size will not eliminate all letterboxing.
Ice =A=
4th September 2005, 23:16
Try cutting away those black borders (all of them) and then re-encoding!