Penguin

Differences between version 8 and predecessor to the previous major change of Video4Linux.

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Newer page: version 8 Last edited on Saturday, September 24, 2005 11:09:33 am by AristotlePagaltzis Revert
Older page: version 4 Last edited on Friday, September 23, 2005 10:50:10 am by IanMcDonald Revert
@@ -1,7 +1,10 @@
-A framework for drivers of video cameras, TV tuners etc. The device [API] for userland processes is commonly called v4l or v4l2 (v4l being deprecated in theory). Drivers written for this framework are normally compiled into the LinuxKernel as [Module ]s. The devices are enumerated by [UDev] and appear as <tt>/dev/video0</tt>, <tt>/dev/video1</tt> etc
+A framework for drivers of video cameras, TV tuners etc. The device [API] for userland processes is commonly called v4l or v4l2 (v4l being deprecated in theory). Also known as [V4L ]. 
  
-You must have the <tt>videodev</tt> [Module] loaded as well. 
+DeviceDriver~s written for this framework are normally compiled into the LinuxKernel as [Module]s. You must have the <tt>videodev</tt> [Module] loaded as well. The devices are enumerated by [UDev] and appear as <tt>/dev/video0</tt>, <tt>/dev/video1</tt> etc
  
-Some applications require a specific device name e.g. <tt>/dev/video</tt>. If this is the case then use mknod(1) to create a device entry or ln(1) to link one if it already exists. I suspect this could also be done with [UDev] as well but don't know much about that
+Some applications require a specific device name e.g. <tt>/dev/video</tt>, although this is probably not the desired behaviour and these apps will probably be modified in the future. If you are using an application that wants a <tt>/dev/video</tt> but your system only has a <tt>/dev/video0</tt> then you need to either make a symbolic link or set up [UDev] appropriately . For the latter, create/modify the file <tt>/etc/udev/rules.d/00_video4linux.rules</tt> and make sure it contains the following:''''  
  
-Also known as [V4L].  
+ <verbatim>  
+ # make a symlink to the first video device  
+ KERNEL="video0", SYMLINK="video"  
+ </verbatim>