https://cloudinary.com/documentation/zoompan_effect_tutorial
Zoompan Effect (Video Tutorial) | Documentation
Watch a video tutorial to learn about applying the zoompan effect to animate your images.
zoompan effectvideo tutorialdocumentation
https://ffmpeg.org/doxygen/4.1/vf__zoompan_8c.html
FFmpeg: libavfilter/vf_zoompan.c File Reference
ffmpegvfcfile