meshlabserver

TLDR

Convert an STL file to an OBJ file

$ meshlabserver -i [input.stl] -o [output.obj]

Convert a WRL file to a OFF file, including the vertex and face normals in the output mesh

$ meshlabserver -i [input.wrl] -o [output.off] -om vn fn

Dump a list of all the available processing filters into a file

$ meshlabserver -d [path/to/file]

Process a 3D file using a filter script created in the MeshLab GUI (Filters > Show current filter script > Save Script)

$ meshlabserver -i [input.ply] -o [output.ply] -s [filter_script.mlx]

Process a 3D file using a filter script, writing the output of the filters into a log file

$ meshlabserver -i [input.x3d] -o [output.x3d] -s [filter_script.mlx] -l [logfile]