Automatic control system for conversion from multi-video format to IIDC protocol video format

The invention provides an automatic control system for conversion from a multi-video format to an IIDC video format. In the system, corresponding detecting units are arranged to correspond to multiple video protocols; data and a control signal line of an input video are respectively sent to each detecting unit; if one video protocol matches with the input video, the detecting unit corresponding to the protocol generates a high-level enabling signal CE to drive a corresponding collecting unit; meanwhile, other detecting units generate low levels to enable collecting units corresponding to a back-end to be in a reset state; and a multiplexer switch controller regards the CE output by each detecting unit as a control semaphore, regards video data stream collected by each collecting unit as an input, and selectively puts through the CE so as to perform subsequent caching and zooming processing operations for the collected video data streams which correspond to a high level and convert different video data frames