Use Python to change timeline end to last keyframe

Question

I am building a tool to convert FBX files into sequence OBJ files in batches. But I need to be able to change the end of the timeline to the last frame of the selected meshes animation. It's the last part I need to finish this script up. Any help would be greatly appreciated.

Answer 1

This should be enough for simple use. If you use keyframes for example in materials, you will need to add more for loops. At bottom of this page is the list, where you can find animation_data property.

import bpy
import math

last = 1

def find_last_keyframe(what):
    last = 0
    if what.animation_data is not None and what.animation_data.action is not None:
    for fcurve in what.animation_data.action.fcurves:
        for keyframe in fcurve.keyframe_points:
            last = max(last, keyframe.co[0])
    return last

last = max(last, find_last_keyframe(bpy.context.scene))
# if you want to get all objects in scene, use
# for obj in bpy.context.scene.objects:
for obj in bpy.context.selected_objects:
    last = max(last, find_last_keyframe(obj))

# use math.ceil instead of math.floor if you want to round the number up
bpy.context.scene.frame_end = math.floor(last)

---

update: ok, here is much simpler and cleaner solution:

import bpy
scene = bpy.context.scene
old_current_frame = scene.frame_current

while bpy.ops.screen.keyframe_jump(next=True) != {'CANCELLED'}:
    pass

scene.frame_end = scene.frame_current
scene.frame_current = old_current_frame