Blender bake

bake.py

import bpy

def do_bake(scene):
    """ This thing tries to bake all the object animations
        and camera movement into a single track
        
        Drawback: it eleminates scenegraph hierarchy and flattens everzthing 
        
        This suposed to be it, but fingers crossed:
        https://wiki.blender.org/index.php/Dev:2.4/Source/Animation/AnimationBaking
        https://docs.blender.org/api/blender_python_api_2_72_1/bpy.ops.nla.html#bpy.ops.nla.bake
    """ 
    scene = bpy.context.scene
    
    # needs to be iterated 
    # due it missses the other children in scenegraph
    # otherwise it bakes only a random child
    for obj in scene.objets:
        scene.objects.active = obj
        # always do update the scene
        # otherwise ... you know what it does (nothing)
        scene.update()
    
        # visual keying = bakes constraints
        # aside that, parenting and constraints should be cleared
        bpy.ops.nla.bake(\
            frame_start=scene.frame_start,\ 
            frame_end=scene.frame_end,\
            step=scene.frame_step,\
            only_selected=True,\
            visual_keying=True,\
            clear_constraints=True,\
            clear_parents=True,\
            bake_types={'OBJECT'}\
        )