|   <title>Effect Devices Interface</title> | 
 |  | 
 |   <note> | 
 |     <title>Suspended</title> | 
 |  | 
 |     <para>This interface has been be suspended from the V4L2 API | 
 | implemented in Linux 2.6 until we have more experience with effect | 
 | device interfaces.</para> | 
 |   </note> | 
 |  | 
 |   <para>A V4L2 video effect device can do image effects, filtering, or | 
 | combine two or more images or image streams. For example video | 
 | transitions or wipes. Applications send data to be processed and | 
 | receive the result data either with &func-read; and &func-write; | 
 | functions, or through the streaming I/O mechanism.</para> | 
 |  | 
 |   <para>[to do]</para> |