Two webcams - why separate drivers?

By louarnold
Aug 25, 2010
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  1. I have two webcams, one by Nexxtech and another by MIOS - rather non-descript USB Camera.

    The Nexxtech camera seems to need a driver - I have installed it. But the MIOS likely uses the one in Win XP SP3. Why is that? Why won't one driver work for both cameras?

    Rationale: I want to develop some software to process the live video, but could one piece of software be used for both cameras?

    I am a noob about web cams and video processing.

  2. LookinAround

    LookinAround Ex Tech Spotter Posts: 6,491   +183

    Hi louarnold :wave:

    A few comments

    The drivers which can be used by a web cam are dictated by the web cam manufacturer
    The mfr programs a set of "IDs" into each of their devices (such as web cams). The device sends its IDs to Windows. Windows uses these IDs to find suitable drivers which will match (i.e. "support") the IDs. (Window can find zero, or one or even more then one match!)
    > If Windows finds zero driver matches, you get a "No Driver Found" type of error
    > If Windows only finds one driver match, it uses that driver
    > If Windows finds more then one driver match on your machine, Windows chooses what it thinks is the best match of all the matching choices it found on your machine.

    See Plug and Play Overview: How Windows Finds Drivers for USB Devices

    Am just curious though, if you say you're a noob, will you know how to do all the video processing to do what you want?
  3. louarnold

    louarnold TS Rookie Topic Starter

    That link was helpful - for more than the web cams. Thanks very much.

    As for me being a noob, I am for web cams, but once the interface hurdle is overcome, the rest is fine. I have some experience with computer vision and the idea is to extend it.

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