move ffmpeg code to its own file, rename types folder to lib
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13 changed files with 310 additions and 253 deletions
188
app/lib/ffmpeg.ts
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188
app/lib/ffmpeg.ts
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import { extension, videoExtensions, imageExtensions } from "./lib";
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import ffmpeg from 'fluent-ffmpeg';
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import ffmpegInstaller from '@ffmpeg-installer/ffmpeg';
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import ffprobeInstaller from '@ffprobe-installer/ffprobe';
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import which from 'which';
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/**
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* Enum to represent different types of video encoding methods.
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*
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* @enum {string}
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* @property {string} CPU - Uses the libx264 codec for CPU-based encoding
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* @property {string} NVIDIA - Uses the h264_nvenc codec for NVIDIA GPU-based encoding
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* @property {string} AMD - Uses the h264_amf codec for AMD GPU-based encoding
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* @property {string} INTEL - Uses the h264_qsv codec for Intel GPU-based encoding
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* @property {string} APPLE - Uses the h264_videotoolbox codec for Apple GPU-based encoding
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*/
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export enum EncodingType {
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CPU = 'libx264',
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NVIDIA = 'h264_nvenc',
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AMD = 'h264_amf',
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INTEL = 'h264_qsv',
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APPLE = 'h264_videotoolbox'
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}
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/**
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* The current encoding type being used for video encoding.
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* @type {EncodingType}
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*/
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export let currentEncoding: EncodingType = EncodingType.CPU;
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/**
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* Sets the current encoding type.
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*
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* @param {EncodingType} type - The encoding type to set.
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*/
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export const setEncodingType = (type: EncodingType) => {
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currentEncoding = type;
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};
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/**
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* Returns the path to an executable by checking environment variables, the system path, or a default installer.
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*
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* @param {string} envVar - The environment variable to check for the executable's path.
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* @param {string} executable - The name of the executable to search for in the system path.
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* @param {Object} installer - An object containing the default installer path.
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* @param {string} installer.path - The default path to use if the executable is not found in the environment or system path.
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*
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* @returns {string} - The path to the executable.
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* @throws Will throw an error if the executable is not found and the installer path is not available.
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*/
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const getExecutablePath = (envVar: string, executable: string, installer: { path: string }) => {
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if (process.env[envVar]) {
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return process.env[envVar];
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}
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try {
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return which.sync(executable);
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} catch (error) {
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return installer.path;
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}
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};
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const ffmpegPath = getExecutablePath('EB_FFMPEG_PATH', 'ffmpeg', ffmpegInstaller);
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const ffprobePath = getExecutablePath('EB_FFPROBE_PATH', 'ffprobe', ffprobeInstaller);
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console.log(`Using ffmpeg from path: ${ffmpegPath}`);
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console.log(`Using ffprobe from path: ${ffprobePath}`);
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ffmpeg.setFfmpegPath(ffmpegPath!);
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ffmpeg.setFfprobePath(ffprobePath!);
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const checkEnvForEncoder = () => {
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const envEncoder = process.env.EB_ENCODER?.toUpperCase();
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if (envEncoder && Object.keys(EncodingType).includes(envEncoder)) {
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setEncodingType(EncodingType[envEncoder as keyof typeof EncodingType] as EncodingType);
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console.log(`Setting encoding type to ${envEncoder} based on environment variable.`);
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} else if (envEncoder) {
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console.warn(`Invalid encoder value "${envEncoder}" in environment variable, defaulting to CPU.`);
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}
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};
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checkEnvForEncoder();
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/**
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* Downscale a video using ffmpeg with various encoding options.
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*
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* @param {string} path - The input video file path.
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* @param {string} filename - The name of the file.
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* @param {string} extension - The file extension of the file
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* @returns {Promise<void>} - A promise that resolves when the downscaling is complete, and rejects on error.
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*
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* @example
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* ffmpegDownscale('input.mp4').then(() => {
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* console.log('Downscaling complete.');
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* }).catch((error) => {
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* console.log(`Error: ${error}`);
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* });
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*/
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export const ffmpegDownscale = (path: string, filename: string, extension: string) => {
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const startTime = Date.now();
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const outputOptions = [
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'-vf', 'scale=-2:720',
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'-c:v', currentEncoding,
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'-c:a', 'copy',
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];
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// Adjust output options based on encoder for maximum quality
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switch (currentEncoding) {
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case EncodingType.CPU:
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outputOptions.push('-crf', '0');
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break;
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case EncodingType.NVIDIA:
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outputOptions.push('-rc', 'cqp', '-qp', '0');
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break;
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case EncodingType.AMD:
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outputOptions.push('-qp_i', '0', '-qp_p', '0', '-qp_b', '0');
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break;
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case EncodingType.INTEL:
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outputOptions.push('-global_quality', '1'); // Intel QSV specific setting for high quality
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break;
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case EncodingType.APPLE:
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outputOptions.push('-global_quality', '1');
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break;
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}
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return new Promise<void>((resolve, reject) => {
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ffmpeg()
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.input(path)
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.outputOptions(outputOptions)
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.output(`uploads/720p-${filename}${extension}`)
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.on('end', () => {
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console.log(`720p copy complete using ${currentEncoding}, took ${Date.now() - startTime}ms to complete`);
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resolve();
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})
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.on('error', (e) => reject(new Error(e)))
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.run();
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});
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}
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/** Converts video to gif and vice versa using ffmpeg */
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/**export const convert: Middleware = (req, res, next) => {
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const files = req.files as Express.Multer.File[];
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for (const file in files) {
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const nameAndExtension = extension(files[file].originalname);
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if (videoExtensions.includes(nameAndExtension[1])) {
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console.log("Converting " + nameAndExtension[0] + nameAndExtension[1] + " to gif");
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console.log(`Using ${currentEncoding} as encoder`);
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const startTime = Date.now();
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ffmpeg()
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.input(`uploads/${nameAndExtension[0]}${nameAndExtension[1]}`)
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.inputFormat(nameAndExtension[1].substring(1))
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.outputOptions(`-c:v ${currentEncoding}`)
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.outputFormat("gif")
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.output(`uploads/${nameAndExtension[0]}.gif`)
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.on("end", function() {
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console.log(`Conversion complete, took ${Date.now() - startTime} to complete`);
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console.log(`Uploaded to uploads/${nameAndExtension[0]}.gif`);
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})
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.on("error", (e) => console.log(e))
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.run();
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} else if (nameAndExtension[1] == ".gif") {
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console.log(`Converting ${nameAndExtension[0]}${nameAndExtension[1]} to mp4`);
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console.log(`Using ${currentEncoding} as encoder`);
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const startTime = Date.now();
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ffmpeg(`uploads/${nameAndExtension[0]}${nameAndExtension[1]}`)
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.inputFormat("gif")
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.outputFormat("mp4")
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.outputOptions([
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"-pix_fmt yuv420p",
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`-c:v ${currentEncoding}`,
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"-movflags +faststart"
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])
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.noAudio()
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.output(`uploads/${nameAndExtension[0]}.mp4`)
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.on("end", function() {
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console.log(`Conversion complete, took ${Date.now() - startTime} to complete`);
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console.log(`Uploaded to uploads/${nameAndExtension[0]}.mp4`);
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next();
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})
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.run();
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}
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}
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};**/
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