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Author Topic: Amiga Live Image Processing Board  (Read 4942 times)

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Offline freqmax

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Re: Amiga Live Image Processing Board
« on: April 19, 2013, 05:11:19 AM »
Quote from: TheBilgeRat;732331
"can capture sequences as large as the amount of free memory" :eek:


In other words.. with 720 x 525 @ 6-bpp with 8 MB of memory that would last 1.2 seconds..

Or need a harddisc storage rate of 6.8 MB/s.

Nice tool, inadequate computer ;)
 

Offline freqmax

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Re: Amiga Live Image Processing Board
« Reply #1 on: April 20, 2013, 12:34:57 AM »
Only if you sacrifice quality in some way.
 

Offline freqmax

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Re: Amiga Live Image Processing Board
« Reply #2 on: April 20, 2013, 05:33:09 PM »
The bits got to go somewhere. So if you want to record the video feed and use the most lowrate option there is:
8 Mbyte / resolution * bits/pixel * frames/second =
(8*1048576 *8)/(320*256 *4 *15) = 13.66 seconds of video

Tell me where else the bits would go? keep in mind that the card seems not to be able to do digital video compression (ie mpeg4 etc). With low resolution and for an Amiga fast harddisc controller that manage 600 kB/s realtime disc saving is one option. That is if realtime DMA from video capture won't collide with disc transfers.

If one uses something else than video capture, like instructions to mix existing video feeds or overlay graphics. The demand for storage is significantly less.
 

Offline freqmax

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Re: Amiga Live Image Processing Board
« Reply #3 on: April 21, 2013, 06:22:47 AM »
I do know something about computers and electronics. But if the board just realtime process video and then output it directly. Memory is of little concern.
 

Offline freqmax

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Re: Amiga Live Image Processing Board
« Reply #4 on: April 21, 2013, 09:02:48 AM »
Commodore did it, then came the junk.. :P