[jitter] Re: Video Delay in Jitter

The abstraction for video delay works great, but I don't understand the theory behind it

Could someone help explain the patch to me ? Why does the change of the third number in "srcdimstart 0 0 $1" or in "srcdimend 319 239 $1" affect the delayed video ? 

(I thought the 3rd number only deal with dimension but not with time.)

What does the formula in the expr object do ?

Could someone help ? Thanks.

Quote: KillingFrenzy wrote on Thu, 22 February 2007 14:35
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> A 3d matrix way of doing it, which I find to be more reliable than the matrixset object.
> I have this configured for 0-127 frames of delay.  Just substitute values or variables for "127" maximum or "128" frames as necessary to have a different defined buffer of sorts.
> 
> Paste this:
> 
> 
> #P outlet 37 209 15 0;
> #P inlet 157 2 15 0;
> #P inlet 37 1 15 0;
> #P window setfont "Sans Serif" 9.;
> #P window linecount 1;
> #P newex 56 125 111 9109513 expr (($i1+128)-$i2)%128;
> #P newex 37 171 215 9109513 jit.matrix 4 char 320 240 @usesrcdim 1 @adapt 0;
> #P message 56 149 182 9109513 srcdimstart 0 0 \$1 \, srcdimend 319 239 \$1;
> #N counter 0 0 127;
> #X flags 0 0;
> #P newobj 56 57 73 9109513 counter 0 0 127;
> #P message 56 79 182 9109513 dstdimstart 0 0 \$1 \, dstdimend 319 239 \$1;
> #P newex 37 101 233 9109513 jit.matrix 4 char 320 240 128 @usedstdim 1 @interp 0;
> #P newex 37 29 29 9109513 t l b;
> #P comment 2 3 30 9109513 Delay;
> #B color 10;
> #P comment 55 209 69 9109513 Delayed Video;
> #P comment 54 1 52 9109513 Input Video;
> #P comment 175 1 64 9109513 Delay Amount;
> #P user panel 1 0 34 20;
> #X brgb 0 0 0;
> #X frgb 0 0 0;
> #X border 1;
> #X rounded 0;
> #X shadow 0;
> #X done;
> #P connect 13 0 11 1;
> #P connect 11 0 9 0;
> #P connect 8 0 11 0;
> #P connect 8 0 7 0;
> #P connect 5 1 8 0;
> #P connect 10 0 14 0;
> #P connect 9 0 10 0;
> #P connect 6 0 10 0;
> #P lcolor 13;
> #P connect 5 0 6 0;
> #P lcolor 13;
> #P connect 7 0 6 0;
> #P connect 12 0 5 0;
> #P window clipboard copycount 15;
> 
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