A frei0r video source plugin that renders Lottie animation files.

Supported parameters are:

0. animation - a path or URL to a Lottie animation JSON file
1. time_scale - time scale multiplier (default 1.0). ffmpeg reports frei0r times in milliseconds so use 0.001 to convert to seconds.
2. mode - playback mode forward (default), reverse, bounce or reverse-bounce
3. loop - loop animation (default false)
4. fit - how to fit animation to video frame: contain (default), fill, cover, fit-width, fit-height or none
5. background_color - background color of animation, default is transparent

Download the plugin release and extract into a frei0r-plugin directory.

On macOS you must then xattr -dr com.apple.quarantine l0ttie.so.

Example using ffmpeg to overlay a transparent animation over a video. The animation is half the size of the video and positioned in the lower right corner.

FREI0R_PATH=frei0r-plugin/ ffmpeg \
  -i https://sample-videos.com/video321/mp4/360/big_buck_bunny_360p_1mb.mp4 \
  -f lavfi -i "frei0r_src=size=320x180:framerate=25:filter_name=l0ttie:filter_params=https\\\\://lottie.host/b5100a40-ab25-4a1e-8ac4-88b63f3f1018/Nd2wTOGBRS.json|0.001" \
  -filter_complex overlay=x=main_w-overlay_w:y=main_h-overlay_h:eval=init \
  -t 2 -y output.mp4

A similar command using melt from MLT framework

FREI0R_PATH=frei0r-plugin/ melt \
  https://sample-videos.com/video321/mp4/360/big_buck_bunny_360p_1mb.mp4 out=60 \
  frei0r.l0ttie 0=https://lottie.host/b5100a40-ab25-4a1e-8ac4-88b63f3f1018/Nd2wTOGBRS.json out=60 \
  -mix 60 -mixer affine scale_x=2 scale_y=2 halign=right valign=bottom