[jitter] [Sharing is fun] - Closed Captioning matrix based processing/parsing

Hello.

Here is a patch I rediscovered that myself and a co-worker created to  
parse scanline 21 of NTSC video, which contains closed captioning  
information.

This patch parses CC in realtime and converts to a text stream. If  
you wish to use a live source, your quicktime based capture card  
*must* be able to pass through line 21, most consumer products do not  
do this, however, professional broadcast/editing gear does, like AJA  
and Decklink cards.

Anyway, ive included an example CC encoded movie at NTSC rates for  
you guys to get the idea.

Check it out, lots of fun to be had. You might need to 'tune' the  
offsets depending on the incoming analog or digital signal, as they  
ADC conversion or H/V sync may put the horizontal offset of the CC  
encoding off by a bit.

Ive also included some max performance optimization notes, my co- 
worker wrote this patch, and i tuned it. Ive lost his original patch,  
but it went from ~ 20fps to around 400.

patch:
http://abstrakt.vade.info/ILOVETHEMAXLIST/ClosedCaptioningRevised.zip

example video:
http://abstrakt.vade.info/ILOVETHEMAXLIST/CC.mov

Yeah, I know, its not OpenGL, but good old Jitter can still do some  
fun stuff.

v a d e //

www.vade.info
abstrakt.vade.info



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