Average plug-in : weighted average of any number of clips; fast (500 FPS on 2 clips)

[Wilbert]

He sent me the source of his plugin (the plugin itself is included):

http://www.wilbertdijkhof.com/mg262/Average_v11.zip

I didn't test it myself, so, test it as much as your can.

He also sent me some other things, but i will post about that in an other thread.

[redfordxx]

Thanx

[redfordxx]

The old 2005 version (73kB dll) works on my AthlonXP.

The new one (102kB dll) crashes.

In debug mode it writes:
Unhandled exception at 0x01e97151 (Average.dll) in VirtualDub.exe: 0xC0000005: Access violation reading location 0x00000000.

It crashes somewhere after leaving averageplane_P3
called by WeightedAverage
in averageplane_P3(PLANAR_Y, env);
when coming back to WeightedAverage...it crashed somewhere around the bold spot:

...end of averageplane_P3
    99: 	}
   100: }
01E9712F  push        edx  
01E97130  mov         ecx,ebp 
01E97132  push        eax  
01E97133  lea         edx,[ (1E97158h)] 
01E97139  call        @ILT+2455(@_RTC_CheckStackVars@8) (1E7C99Ch) 
01E9713E  pop         eax  
01E9713F  pop         edx  
01E97140  pop         edi  
01E97141  pop         esi  
01E97142  mov         ecx,dword ptr [ebp-4] 
01E97145  xor         ecx,ebp 
01E97147  call        @ILT+640(@__security_check_cookie@4) (1E7C285h) 
01E9714C  mov         esp,ebp 
01E9714E  pop         ebp
01E9714F  mov         esp,ebx 
01E97151  pop         ebx  
01E97152  ret         8

I have four warnings like this, if it helps:

warning C4731: 'WeightedAverage::averageplane_P4' : frame pointer register 'ebx' modified by inline assembly code

When I comment the P3 version, the C version goes well.

[redfordxx]

...pushad and popad helped

[Fizick]

well, Wilbert asked me to compile it, but he forget to ask me to test it
i confirm the bug. I tested it right now only

push ebx
...
pop ebx
will be enough

I also provided him the version compiled by VC7.1 (VC 2003 tollkit),
it works fine with same code (without the patch).


http://forum.doom9.org/showthread.php?t=100374

[redfordxx]

I made function AverageM(clip, maskclip, clip, maskclip....) based on Average.
However I have one problem (it is similar as in MaskedMerge in MaskTools): I cannot deliver full range of mask values [0,256] but only [0,255] in maskclips. I have folowing options and I don't know what to do:
1) divide by 256 at the end...cons:cannot have full scale in one maskclip
2) divide by 255 at the end...cons:cannot do fifty-fifty for example (averaging pixels from two clips weighted both by 128 results in x=(a*128+b*128)/255=(a+b)/1.99 instead of (a+b)/2
3) make the weightscale [0,128]... cons: reduced precision

What is your opinion on this?

[redfordxx]

BTW:despite there are only constants used in Average, AverageM is by 10%-20% faster;-)

[nonsens112]

redfordxx

can you or anybody else post a link to this wonderful AverageM plugin?
I really need such thing.

[nonsens112]

can anyone at least post a link to Average's source code?
link above is broken.

[thetoof]

Is this what you're looking for?

[Nikos]

Here: Average_24Oct05

[Wilbert]

@Fizick,

I also provided him the version compiled by VC7.1 (VC 2003 tollkit),

Do you still have this? Then i will include it in the package above.

[nonsens112]

thetoof, Nikos

I am looking for an AverageM plugin or source code (in C++) of Average

[gzarkadas]

Originally Posted by nonsens112

thetoof, Nikos

I am looking for an AverageM plugin or source code (in C++) of Average

Look at the bottom of the 1st post of the "mg262's plugins with source" thread.

[nonsens112]

gzarkadas

big thanks!

[Fizick]

Originally Posted by Wilbert

@Fizick,

Do you still have this? Then i will include it in the package above.

Yes, I have.
You missed it? How I can send it to you?

[Fizick]

ttttt

[Wilbert]

Yes, I have.
You missed it?

I was to lazy to copy it to my hard drive I named it v1.1 (see above).

[rfmmars]

Originally Posted by Fizick

ttttt

Still waiting for this to be approved

Richard

[pbristow]

Wilbert's links appear to be dead now.

Please, oh gods of AVIsynth, do not allow this wonderful, really useful filter to die out. Could it not be incorporated into the AVIsynth core filter set? It really is that useful!