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View Code? Open in Web Editor NEWv4l-lua small library binding V4L2 CAMERA API to Lua.
v4l-lua small library binding V4L2 CAMERA API to Lua.
v4l-lua is a small library binding V4L2 CAMERA API to Lua. See the example "capture.lua" to see how easy is to capture from V4L2 cameras :D To compile v4l-lua, you'll need the v4lconvert and Lua development files. WARNING: THIS LIBRARY STILL IS IN ALPHA STAGE! Plese, report bugs ;) Usage: local v4l = require 'v4l' dev = v4l.open(device_name, width, height) -- opens a v4l camera, where: device_name is usually '/dev/video0', and the -- optional params width and height can be used to suggest a resolution, -- although a similar one may be chosen... array = dev:getframe() -- returns a table with the rgb values for the pixels from left to right -- top to bottom, in other words the the pixel (x,y) will appear at -- array[c + 3 * (x + y * dev:width())], assuming (0,0) to be the -- top left corner, and c=1 for red, c=2 for green and c=3 for blue. str = dev:getframestr() -- similar to getframe, but the values will be returned via a string -- instead of a table; you can use the string.byte for fast access. w = dev:width() -- return effective width h = dev:height() -- and effective height fd = dev:fd() -- file descriptor number, if you need it for concurrent I/O with other files dev:close() -- closes the camera freeing any resources
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