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const axios = require('axios');
const fs = require('fs');
const path = require('path');
const { tmpdir } = require('os');
const Crypto = require('crypto');
const ffmpeg = require('fluent-ffmpeg');
const ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
ffmpeg.setFfmpegPath(ffmpegPath);
/**
* Fetch a GIF from a given API URL.
* @param {string} url - The API endpoint to fetch the GIF.
* @returns {Promise<Buffer>} - The GIF buffer.
*/
async function fetchGif(url) {
try {
const response = await axios.get(url, { responseType: 'arraybuffer' });
return response.data;
} catch (error) {
console.error("❌ Error fetching GIF:", error);
throw new Error("Could not fetch GIF.");
}
}
/**
* Converts a GIF buffer to a video buffer.
* @param {Buffer} gifBuffer - The GIF buffer.
* @returns {Promise<Buffer>} - The MP4 video buffer.
*/
async function gifToVideo(gifBuffer) {
const filename = Crypto.randomBytes(6).toString('hex');
const gifPath = path.join(tmpdir(), `${filename}.gif`);
const mp4Path = path.join(tmpdir(), `${filename}.mp4`);
fs.writeFileSync(gifPath, gifBuffer);
await new Promise((resolve, reject) => {
ffmpeg(gifPath)
.outputOptions([
"-movflags faststart",
"-pix_fmt yuv420p",
"-vf scale=trunc(iw/2)*2:trunc(ih/2)*2"
])
.on("error", (err) => {
console.error("❌ ffmpeg conversion error:", err);
reject(new Error("Could not process GIF to video."));
})
.on("end", resolve)
.save(mp4Path);
});
const videoBuffer = fs.readFileSync(mp4Path);
fs.unlinkSync(gifPath);
fs.unlinkSync(mp4Path);
return videoBuffer;
}
module.exports = { fetchGif, gifToVideo };
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