Development: Video4Linux APIs

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Linux Video4Linux application programming interface (API)

  • v4l (also known as v4l1) is the original video capture/overlay API of the linux kernel. It appeared late in the 2.1.x development cycle of the linux kernel. Support for the v4l API was dropped from the 2.5.x branch with the 2.6.15 kernel release, but remains in the 2.4.x branch.
  • v4l2 is the second generation of the video4linux API which fixes a number of design bugs of the first version. It was integrated into the standard kernel in 2.5.x.