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From YLS Software:
Free AVI Joiners Freeware is the best software for join AVI (Audio Video Interleave) video file. It support DV-AVI, Divx AVI and Xvid AVI; Add unlimited AVI video files in the fast and easy setup interface; It is very easy to use without any special setting, only a few clicks complete the task of video file join; It can detect your hardware configuration and decide an optimized join scheme automatically; Join your AVI video files and preserve video quality after adding more AVI files by click mouse button; Provide >300% joining speed by multithreading, so fast beyond your imagination; Automatically shutdown the computer after join task.