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Can you obtain data from multiple frames without using bpy.context.scene.frame_set()? The above command takes too long on my scene, and I also have too many frames, but I only need to grab one numerical data from each frame.

Is there a way to do this without going to each frame or iteration? I'm specifically interested in grabbing Shape Key value from each frame.

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You can read the keyframe points of F-Curves directly, which doesn't require frame changes. Instead, the x-coordinate of a point is the time / keyframe, the y-coordinate is the value.

To find the right F-Curves, iterate over Object.animation_data.action.fcurves and check their data_path and array_index properties.

Related: http://www.blender.org/documentation/blender_python_api_2_71_release/info_quickstart.html#animation (See the low level example)

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  • $\begingroup$ Thank you for the answer! I was able to figure out where they are stored using your description and the link. For my Shape Key in particular, the data were in 'D.actions[action_num].fcurves[shape_key_num].keyframe_points[frame_num].co[1]' $\endgroup$ – Efreeto Sep 5 '14 at 1:19

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