Slashdot Mirror

← Back to Stories (view on slashdot.org)

Large-Scale Video Archiving?

Posted by Cliff on from the now-that's-a-lotta-data dept.

BondHeadGuy asks: "Ok, say you have 1000+ cameras emitting 30 frames/second worth of 640x480 grayscale video...and you have to store it indefinitely. What do you do? This is a real question, believe it or not. 30 frames/s * 300 KB/frame = 9 MB/s per camera. 100:1 video compression brings that down to ~90 KB/s. But 90 KB/s * 1000 cameras = 90 MB/s, or ~8 terabytes/day. Retrieval, though, can be essentially arbitrarily slow. Reliability should be good enough to not be annoying long term. Is there a solution that: has 8 TB/day storage capacity, can handle the 90 MB/s write speed, and lets you save some bucks on the (slow) read side?"

2 of 494 comments (clear)

  1. Re:compression!! by Oswald · · Score: 0, Offtopic

    Not just a prick, but stupid, too (the usual case, actually). The original question posits 100:1 compression to 3kB per frame.

    Brush up on those reading skills here.

  2. This is a large scale face recognition project by BigJim.fr · · Score: 2, Offtopic

    Using FPGA hardware, Rob McCready, the original poster achieved around an 88% face detection rate in real-time from black and white pictures with a 30 frames per second video camera.
    This explains his crazy requirements : looks like he is busy thinking about large scale applications of his work.
    http://www.nce.gc.ca/en/success/9920/micronet3_e.h tm