There are 2 options:

• Run using Docker. One-line command, the option requires only Docker installed
• Download and run compiled executable files. The option requires run-time dependecies installed

Replace with directory with Lottie animations / Telegram stickers and run:

• Convert to GIF:

  docker run --rm -v <path to directory>:/source edasriyan/lottie-to-gif

• Convert to PNG:

  docker run --rm -v <path to directory>:/source edasriyan/lottie-to-png

• Convert to APNG:

  docker run --rm -v <path to directory>:/source edasriyan/lottie-to-apng

• Convert to WEBP:

  docker run --rm -v <path to directory>:/source edasriyan/lottie-to-webp

• Convert to WEBM:

  docker run --rm -v <path to directory>:/source edasriyan/lottie-to-webm

You can provide parameters via env variables:

• HEIGHT: Output image height. Default: 512
• WIDTH: Output image width. Default: 512
• FPS: Output frame rate. Default: apng,png,webp - 60; gif - 50
• QUALITY: Output quality. Default: 90
• THREADS: Number of threads to use. Default: number of CPUs

Example:

docker run --rm -e HEIGHT=256 -e WIDTH=256 -e FPS=30 -v /home/ed/Downloads/lottie-animations:/source edasriyan/lottie-to-apng

Results will be saved next to each source file in the same directory.

1. Install run-time dependencies. Make sure the path to them present in PATH variable:

   • gifski if you want to convert to GIF
   • ffmpeg if you want to convert to APNG or WEBM
   • img2webp if you want to convert to WEBP

2. Download executable from releases section of this repo for your OS and arch

3. In downloaded archive find the following executable scripts:

   • lottie_to_apng.sh
   • lottie_to_gif.sh
   • lottie_to_png.sh
   • lottie_to_webp.sh
   • lottie_to_webm.sh

   All of them have the same CLI:

   $ ./bin/lottie_to_gif.sh -h                       
   usage: ./bin/lottie_to_gif.sh [--help] [--output OUTPUT] [--height HEIGHT] [--width WIDTH] [--threads THREADS] [--fps FPS] [--quality QUALITY] path
   
   Lottie animations (.json) and Telegram stickers for Telegram (*.tgs) to animated .gif converter
   
   Positional arguments:
   path              Path to .json or .tgs file to convert
   
   Optional arguments:
   -h, --help        show this help message and exit
   --output OUTPUT   Output file path
   --height HEIGHT   Output image height. Default: 
   --width WIDTH     Output image width. Default: 512
   --fps FPS         Output frame rate. Default: 50
   --threads THREADS Number of threads to use. Default: number of CPUs
   --quality QUALITY Output quality. Default: 90
   

1. Install dependencies

   1. Make sure you have C++17 compiler, make, cmake and conan tools installed; otherwise install them
   2. Detect your conan profile

      conan profile detect
      

   3. Install conan dependencies

      conan install --build=missing .
      

2. Invoke conan preset

   • Linux & MacOS

     cmake --preset conan-release
     

   • Windows

     cmake --preset conan-default
     

3. Build

   cmake -DCMAKE_BUILD_TYPE=Release CMakeLists.txt && cmake --build . --config Release
   

   M1 troubleshooting

   Run the following command and try again:

   echo '#if defined(__ARM_NEON__)
   
   #include "vdrawhelper.h"
   
   void memfill32(uint32_t *dest, uint32_t value, int length)
   {
       memset(dest, value, length);
   }
   
   static void color_SourceOver(uint32_t *dest, int length, uint32_t color, uint32_t alpha)
   {
       int ialpha, i;
   
       if (alpha != 255) color = BYTE_MUL(color, alpha);
       ialpha = 255 - vAlpha(color);
       for (i = 0; i < length; ++i) dest[i] = color + BYTE_MUL(dest[i], ialpha);
   }
   
   void RenderFuncTable::neon()
   {
       updateColor(BlendMode::Src , color_SourceOver);
   }
   #endif
   ' > _deps/rlottie-src/src/vector/vdrawhelper_neon.cpp
   

4. Convert!

   • To convert to GIF:

     ./bin/lottie_to_gif.sh /home/ed/Downloads/animation.json
     

   • To convert to PNG:

     ./bin/lottie_to_png.sh /home/ed/Downloads/animation.json
     

   • To convert to APNG:

     ./bin/lottie_to_apng.sh /home/ed/Downloads/animation.json
     

   • To convert to WEBP:

     ./bin/lottie_to_webp.sh /home/ed/Downloads/animation.json
     

   • To convert to WEBM:

     ./bin/lottie_to_webm.sh /home/ed/Downloads/animation.json
     

   Results will be saved next to each source file in the same directory.

• What is lottie? - https://airbnb.design/lottie/
• You can download Telegram sticker files (.tgs) using @Stickerdownloadbot.