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I have created an animation using Blender. Does anybody know how I can save .avi file of the rendered animation using a python script?

My second question is that I want to run the animation with different parameters and save the video. Basically, I want to reset the animation and run it again with a new force and save a separate video file. I want to do these automatically instead of manually. Is it possible to do that with scripting?

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    $\begingroup$ Assume by animation you mean image sequence ? $\endgroup$ – ideasman42 Jun 5 '15 at 2:16
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    $\begingroup$ Also asking 2 questions at once isn't good, best just ask 2 separate questions. $\endgroup$ – ideasman42 Jun 5 '15 at 2:17
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bpy.context.scene.render.filepath contains the filename that the render will be saved to, you can change this and then use bpy.ops.render.render(animation=True) to render the animation to the specified file.

import bpy
bpy.context.active_object.material_slots[0].material = bpy.data.materials['Red']
bpy.context.scene.render.filepath = '//red.avi'
bpy.ops.render.render(animation=True)

bpy.context.active_object.material_slots[0].material = bpy.data.materials['Blue']
bpy.context.scene.render.filepath = '//blue.avi'
bpy.ops.render.render(animation=True)

The // at the beginning of the filename puts the file in the same folder as the blend file.

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