ppt-to-videoThis skill converts PDF presentation slides, a speech manuscript, and a reference voice into a complete narrated presentation video with synchronized subtitles. It should be used when the user wants to generate a presentation video from PPT/PDF slides with voice cloning, text-to-speech, and subtitle generation. Trigger phrases include PPT to video, generate presentation video, slides to video, 演讲视频, PPT转视频, 幻灯片生成视频, voice cloning presentation, or any request involving converting slide decks into narrated videos with speech synthesis.