compare external files for 2 video servers

Discussion in 'Professional Video Production' started by Rick Merrill, Sep 19, 2005.

  1. Rick Merrill

    Rick Merrill Guest

    This is a little long, but what HOT issues do you see in
    this short comparison of two video servers? Thank you.
    *
    FOR EXTERNALLY MADE FILES
    (FROM THE Product-A MANUAL)
    The Product-A supports MPEG-1 and MPEG-2 video encoding:
    o Acceptable stream types
    MPEG-1 System Stream or MPEG-2 Program Sream
    (single elem.video&single elem.audio)
    NOTE: transport stream is not possible
    Elementary video stream

    o Three video resolutions:
    Note: OTHERS ARE NOT ALLOWED
    352X240 (HXV)
    352 X 480
    720 X 480 ***

    o picture rate must be 29.97 pics per second

    o max bit rate of 10Mb/s
    Note: HIGHER RATES NOT SUPPORTED
    o NTSC with 4:3 ratio required
    o 4:2:0 sampling format required
    [Note: i'm told the video ideal is 4:1:1 - RM]

    o IBBP GOP structure recommended for best quality

    o encode header information in stream eveyr few seconds to aid in error
    recovery

    o Audio must be encoded in the MPEG file using Audio Layer II

    o Audio may be encoded at a 32, 44.1 or 48KHz sampling frequency
    NOTE: recommends a rate of 44.1 for optimal performance

    o MPEG filenames may contain up to 27 characters in addition to the
    required ".mpg" extension.

    *******************************************
    Product-B uses MPEG-2 as
    the primary file format. For acquisition, it
    can operate in 4:2:2 Profile with data rates
    to 50 Mb/sec. Both I-frame and long-GOP
    are supported, with a variety of choices for
    GOP length and frame coding. In Main
    Profile, rates to 15 Mb/sec are available.

    Graphics Option
    Extends Product-B capabilities to include direct import of DV-format
    video and TARGA graphics
    files over Ethernet. Plays DV in native format and graphics with
    simultaneous key and fill. Direct FTP file
    import from <your standard editing software>. May be added to an
    existing Product-B or ordered as an option for new servers.
     
    Rick Merrill, Sep 19, 2005
    #1
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