Frame rate
Watch as an animation →The number of still pictures (frames) shown per second. 24 fps gives film-like motion, and 30 or 60 fps gives smoother motion.
Every export. Match all clips to one rate before joining them.
Seedance 2.5 output is 24 fps, so leave editing and export at 24 fps (fps=24). If 30 fps clips from other tools are mixed in, convert them with fps=24 before joining. Avoid interpolation that raises 24 → 60, since it can make AI clip distortions worse. YouTube recommends encoding and uploading at the frame rate it was shot (generated) at.
Keep one frame rate for the whole project and convert odd clips to match before joining them, for example 24 fps: ffmpeg -i in.mp4 -vf fps=24 -c:a copy out.mp4. Avoid interpolating 24 up to 60, which warps AI clips.
Google Cloud — Veo 3.1 model docs (supported frame rate 24 FPS)