You can use a third-party program like Leawo PPT to AVI Converter for help to convert PPT to AVI. Leawo PPT to AVI Converter a professional tool for converting PPT to AVI with a few clicks. Besides  converting PPT to AVI  with all the original PowerPoint effects preserved, it has also provided extensive features like video editing and multiple tasking to make PPT to AVI conversion more efficiently.

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