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OBJ-files don’t contain information how to animate a mesh. You can’t store a skeleton or an animation in it. The only thing you can do is to export several versions of a mesh in different states (one OBJ-file for each state). But real animations can’t be exported via OBJ.
Best sticking to X or FBX
As far as fragmotion you can view animations either by dragging the frame slider or setting the FPS to a lower number, if it is playing too fast the FPS must be higher than 30
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