doeasierdotorg/splitter looks like its doing what you need:
Key Features
Can split AVI/DivX file, large files (>4GB) are supported;
Can split MPEG file, MPEG-1 and MPEG-2 are supported;
Can split WMV/ASF file;
Split file in two ways -- by custom selections or splitting it into multiple equal pieces automatically.
Work very fast and without any quality loss;
Support batch splits, splitting large video file into as many parts as you want;
Very easy to use. No confusing frame calculations or rocket science know-how needed!