Bitrates, some minor clarifaction needed

Discussion in 'Amateur Video Production' started by Tony, Sep 13, 2003.

  1. Tony

    Tony Guest

    I know that the transfer rate from my MiniDV to my PV cia Firewire is 3.7MB
    per second.

    When encoding, using higher bitrates will cause a larger file, and better
    quality.

    So, these two bitrate items are unrelated? Somewhere tonite I read about
    using too high a bitrate in encoding which may not be ideal. But i cant find
    where again! It also mentionmed that DV transfer /captutre is 3.7MB/S to
    6MB/s, so why doed mine transfer at 3.7? Can I transfer at a higher rate,
    and is there a benefit if I can?
     
    Tony, Sep 13, 2003
    #1
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  2. Tony

    JoJo Guest

    Correct. But that is for encoding from DV-AVI to mpeg and to has
    nothing to do with your MiniDV transfer (capture DV-AVI).
    Yes. Maximum bitrate for DVD is about 9800 kbps. But many DVD players
    have trouble with home made video at such a high bitrate. For safety
    it is best to encode at a maximum of 8000kbps.
    No.
     
    JoJo, Sep 13, 2003
    #2
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  3. Tony

    nappy Guest

    True all around. But when you are capturing DV you are not encoding. You are
    just moving data. You only have control over capture resolution when you are
    capturing analog video through a codec which allows resolution settings.
     
    nappy, Sep 13, 2003
    #3
  4. Tony

    Sasha Guest

    If you mean that you want to encode with more than 3.7MB/s then you probably
    mixing units: Mbytes is not the same as Mbits, that is DV is ~25 mbit/s and mpeg
    is usualy less than 8 mbit/s
    One reason is to have realtime decoding. For example, QuickTime on my computer
    never shows DV with good quality (looks like it shows only AC -- the result is
    very blocky), but if you save still frame it is pretty good.
    It is like copying files -- it can be quicker (professional DV copy can be
    quicker than realtime), but the result is always the same.
     
    Sasha, Sep 15, 2003
    #4
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