Re: Dream video machine or nightmare?

From: Captain Dondo (yan_at_NsOeSiPnAeMr.com)
Date: 05/28/05

  • Next message: Dances With Crows: "Re: printing on cd's in linux?" 
    Date: Fri, 27 May 2005 17:54:00 -0700

    On Fri, 27 May 2005 19:19:09 -0400, John-Paul Stewart wrote:

    > Captain Dondo wrote:
    >> I have a project where we're trying to capture 4 video signals. For
    >> various reasons, we want to use 1 box if possible. Disk I/O and CPU are
    >> going to be limiting factors.
    > [snip]
    >> I want to use mencoder
    >> to capture the raw data, then post-process it to compress for storage
    >> and distribution.
    >
    > Just out of curiosity: why store raw data and compress it in post
    > processing? Lots of cards (e.g., the Hauppage WinTV PVR series) support
    > real-time hardware compression (i.e., the card does the compression rather
    > than the host CPU). That would eliminate the time-consuming
    > post-processing step, reduce load on the host CPU, and reduce disk I/O
    > requirements (storing compressed streams rather uncompressed).

    Well, I looked at the hardware compression cards; they're a bit out of our
    price range. Although it looks like getting hard disk bandwith might be
    the bottleneck...

    >
    > FWIW, a company called Linux Media Labs (http://www.linuxmedialabs.com/)
    > offers some four input cards that may be of interest to you. The LMLBT44
    > in particular sounds like it might meet your needs with just one card.

    I'll check it out, thanks. 

    -- 
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