Manipulate videos with ffmpeg - inspect metadata, trim, compress, convert formats, extract audio, make GIFs, thumbnails, resize, mute, change speed, merge clips. Use when the user wants to trim/compress/convert video, make a GIF from a video, extract audio from video, merge videos, or grab a video thumbnail. Complements the generate-image skill (post-process Veo video output) and the elevenlabs skill (extracted audio can be cleaned or voice-converted).