dv4l for Debian
---------------

- DV4Linux - Limitations (Copy from: http://dv4l.berlios.de/limits.html) 
 - dv4lstart
    dv4lstart has currently these limitations:

    * The V4L application must not be statically linked to libc, or have 
      the 's' (set user/group ID on execution) bit enabled.
    * Only RGB24 and YUV420P palettes are supported.
    * dv4lstart does not support adjustment of color, brightness and similar 
      parameters.
    * Using dv4lstart adds a little overhead to all library calls that are 
      used in the V4L API.
    * It supports only a single dv1394 camera. 

 - dv4l
    Currently, dv4l has some limitations:

    * Only RGB24 and YUV420P palettes are supported.
    * Not all v4l programs work with dv4l. Skype v2.0beta seems to have trouble 
      with the vloopback driver. GQCam, Kopete, and probably others work only 
      in a slow mode where the video frames are copied twice.
    * dv4l does not support adjustment of color, brightness and similar 
      parameters.
    * Using dv4l is inherently slower than using other methods to access 
      a camera.
    * It supports only a single dv1394 camera. 

 - dv4l or dv4lstart?
   dv4l requires the vloopback kernel module.
   dv4lstart add a little overhead to every library call that might be used to access V4L. Applications using unusual ways to access the V4L API might not work.
   skype (2.0.0.27 beta) runs only with dv4lstart
   Other programs can be used with any of dv4l and dv4lstart.

- How to test dv4l (use effectv)
    1. install vloopback kernel module and effectv
       # apt-get update ; apt-get install vloopback-source effectv
       # m-a a-i vloopback

    2. Connect DVcam to your PC
    3. sudo dv4lstart effectv

- How to use dv4l on ustream
    1. install vloopback kernel module, iceweasel and flashplugin-nonfree
       # apt-get update ; apt-get install vloopback-source iceweasel flashplugin-nonfree
       # m-a a-i vloopback

    2. Connect DVcam to your PC
    3. Start iceweasel with dv4lstart 
       # sudo dv4lstart iceweasel
    4. Connect to ustream

 -- Nobuhiro Iwamatsu <iwamatsu@nigauri.org>  Sun, 26 Oct 2008 18:38:20 +0900
