Returns a camera or video attribute in percentage of the valid range value. \n
* Returns zero if failed or attribute not supported.
*
* \verbatim vc:GetAttribute(attrib: string) -> error: boolean, percent: number [in Lua 5] \endverbatim
* \ingroup capture
Returns a camera or video attribute in percentage of the valid range value. \n * Returns zero if failed or attribute not supported. * * \verbatim vc:GetAttribute(attrib: string) -> error: boolean, percent: number [in Lua 5] \endverbatim * \ingroup capture