@eleven-am/transcoder
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High-performance HLS transcoding library with hardware acceleration, intelligent client management, and distributed processing support for Node.js
169 lines • 6.4 kB
JavaScript
;
/*
* @eleven-am/transcoder
* Copyright (C) 2025 Roy OSSAI
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LocalSegmentProcessor = void 0;
const fs = __importStar(require("fs"));
const path = __importStar(require("path"));
const ffmpeg_1 = __importDefault(require("../ffmpeg"));
/**
* Local segment processor - processes segments on the current machine
* This is the default processor that maintains backward compatibility
*/
class LocalSegmentProcessor {
constructor(workerId) {
this.disposed = false;
this.workerId = workerId || process.env.HOSTNAME || `local-${Date.now()}`;
}
async processSegment(data) {
const startTime = Date.now();
try {
// Check if segment already exists
if (await this.segmentExists(data.outputPath)) {
return {
success: true,
segmentIndex: data.segmentIndex,
outputPath: data.outputPath,
cached: true,
processingTime: Date.now() - startTime,
};
}
// Process the segment using FFmpeg
await this.runFFmpeg(data);
return {
success: true,
segmentIndex: data.segmentIndex,
outputPath: data.outputPath,
processingTime: Date.now() - startTime,
};
}
catch (error) {
return {
success: false,
segmentIndex: data.segmentIndex,
outputPath: data.outputPath,
processingTime: Date.now() - startTime,
error: error,
};
}
}
async isHealthy() {
// Local processor is always healthy
return !this.disposed;
}
getMode() {
return 'local';
}
async dispose() {
this.disposed = true;
}
async runFFmpeg(data) {
const { inputOptions, outputOptions, videoFilters } = data.ffmpegOptions;
// Ensure output directory exists (async)
const outputDir = path.dirname(data.outputPath);
await fs.promises.mkdir(outputDir, { recursive: true });
// Create temp file path with worker ID to avoid collisions
const tempPath = `${data.outputPath}.${this.workerId}.tmp`;
return new Promise((resolve, reject) => {
const command = (0, ffmpeg_1.default)(data.sourceFilePath)
.inputOptions(inputOptions)
.outputOptions(outputOptions)
.output(tempPath);
if (videoFilters) {
command.videoFilters(videoFilters);
}
command.on('end', async () => {
try {
// Atomic rename from temp to final path
await fs.promises.rename(tempPath, data.outputPath);
resolve();
}
catch (renameError) {
// If rename fails due to file already existing, that's ok
if (renameError.code === 'EEXIST') {
console.log(`Segment ${data.segmentIndex} already exists (lost race to another worker)`);
// Clean up our temp file
await fs.promises.unlink(tempPath).catch(() => { });
resolve();
}
else {
reject(renameError);
}
}
});
command.on('error', async (err) => {
// Attempt to clean up temp file on error
try {
await fs.promises.unlink(tempPath);
}
catch {
// Ignore unlink errors - file may not exist
}
reject(err);
});
command.run();
});
}
async segmentExists(filePath) {
try {
await fs.promises.access(filePath);
return true;
}
catch {
return false;
}
}
}
exports.LocalSegmentProcessor = LocalSegmentProcessor;
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