Avisynth: Deinterlace with the Bob Filter...

[deltaboy]

KWAG, remember you giving me that website that shows how to deinterlace your video and bring it back to its original film based format? i tried this method and it worked, but i ran into a bit of ghosting. i tell ya, using the bob filter is so easy and it produces absolutely NO ghosting affects.

try it out! it doubles your framerate. its easy to just change to framerate back to its original in tmpgenc.

ITS EASY AND IT WORKS... just type "Bob".

[rendalunit]

hello,

i just encoded an 87 min music dvd with the new template, and since it is interlaced, I thought I'd give the bob filter a try. The movie turned out great, but the fast movement was really zig-zaggy and it looked really weird. The avisynth guide says to put it like this- bob (clip). What is the clip parameter?

heres my script:

LoadPlugin("C:\Program Files\DVD2SVCD\MPEG2Dec\MPEG2DEC.dll")
mpeg2source("C:\ENCODING\nhuquynh.d2v")
BilinearResize(320,446,8,0,704,480)
bob
TemporalSmoother(2,2)
AddBorders(16,17,16,17)
#Trim(0,158187).FadeOut(150)
#ResampleAudio(44100) # CCE 2.5 'crashfix' for Athlons
#== If you want this 'fix' permanently, edit the INI-file:
#== Under [AVSscript] set the CCEcrashfix-option to
#== CCEcrashfix=1

Kwag, what method of deinterlacing do you recommend?

thx
ren

[deltaboy]

i dont use (clip), only Bob. it says that the filter uses the BicubicResize. i see you have bilinear in your script. try that in yours, might correct the zig-zagging.

[rendalunit]

Hey thx Deltaboy,

I had a feeling maybe the bilinear resize line in there might be the problem

I'll try it with bicubic resize and see what happens- oh also the encoding time increased by about an hour-

i appreciate the advice
ren

[rendalunit]

i found this in the Decomb 3.8 readme by Donald Graft:
--------------------------------------------------------------------------------------
Don't Invoke an Avisynth Strangeness This one is very important and can easily cost you a 25% speed penalty! It appears that Avisynth has a strangeness that causes it to waste enormous amounts of time when there are no parentheses with the commands. For example, this script:

Telecide
Decimate

...will run much slower than this one:

Telecide()
Decimate()

If you doubt this, try it both ways and see. It is critical, therefore, to always include at least one parameter or the set of empty parentheses. That is why the scenarios below all are coded that way.
-------------------------------------------------------------------------------------

hey DeltaBoy, I don't know if this applies to all avisynth filters- maybe it should be like this: Bob()

It seems stupid but it might save a little time

[deltaboy]

ya ive heard that too. doesnt really change much in this instance. thx for the tip tho .