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Alexander Zinn
2025-08-17 11:41:43 -04:00
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.cursor/rules/use-bun-instead-of-node-vite-npm-pnpm.mdc Normal file
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---
description: Use Bun instead of Node.js, npm, pnpm, or vite.
globs: "*.ts, *.tsx, *.html, *.css, *.js, *.jsx, package.json"
alwaysApply: false
---
Default to using Bun instead of Node.js.
- Use `bun <file>` instead of `node <file>` or `ts-node <file>`
- Use `bun test` instead of `jest` or `vitest`
- Use `bun build <file.html|file.ts|file.css>` instead of `webpack` or `esbuild`
- Use `bun install` instead of `npm install` or `yarn install` or `pnpm install`
- Use `bun run <script>` instead of `npm run <script>` or `yarn run <script>` or `pnpm run <script>`
- Bun automatically loads .env, so don't use dotenv.
## APIs
- `Bun.serve()` supports WebSockets, HTTPS, and routes. Don't use `express`.
- `bun:sqlite` for SQLite. Don't use `better-sqlite3`.
- `Bun.redis` for Redis. Don't use `ioredis`.
- `Bun.sql` for Postgres. Don't use `pg` or `postgres.js`.
- `WebSocket` is built-in. Don't use `ws`.
- Prefer `Bun.file` over `node:fs`'s readFile/writeFile
- Bun.$`ls` instead of execa.
## Testing
Use `bun test` to run tests.
```ts#index.test.ts
import { test, expect } from "bun:test";
test("hello world", () => {
expect(1).toBe(1);
});
```
## Frontend
Use HTML imports with `Bun.serve()`. Don't use `vite`. HTML imports fully support React, CSS, Tailwind.
Server:
```ts#index.ts
import index from "./index.html"
Bun.serve({
routes: {
"/": index,
"/api/users/:id": {
GET: (req) => {
return new Response(JSON.stringify({ id: req.params.id }));
},
},
},
// optional websocket support
websocket: {
open: (ws) => {
ws.send("Hello, world!");
},
message: (ws, message) => {
ws.send(message);
},
close: (ws) => {
// handle close
}
},
development: {
hmr: true,
console: true,
}
})
```
HTML files can import .tsx, .jsx or .js files directly and Bun's bundler will transpile & bundle automatically. `<link>` tags can point to stylesheets and Bun's CSS bundler will bundle.
```html#index.html
<html>
<body>
<h1>Hello, world!</h1>
<script type="module" src="./frontend.tsx"></script>
</body>
</html>
```
With the following `frontend.tsx`:
```tsx#frontend.tsx
import React from "react";
// import .css files directly and it works
import './index.css';
import { createRoot } from "react-dom/client";
const root = createRoot(document.body);
export default function Frontend() {
return <h1>Hello, world!</h1>;
}
root.render(<Frontend />);
```
Then, run index.ts
```sh
bun --hot ./index.ts
```
For more information, read the Bun API docs in `node_modules/bun-types/docs/**.md`.

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.gitignore vendored Normal file
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# dependencies (bun install)
node_modules
# output
out
dist
*.tgz
# code coverage
coverage
*.lcov
# logs
logs
_.log
report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
# dotenv environment variable files
.env
.env.development.local
.env.test.local
.env.production.local
.env.local
# caches
.eslintcache
.cache
*.tsbuildinfo
# IntelliJ based IDEs
.idea
# Finder (MacOS) folder config
.DS_Store

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README.md Normal file
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# RTMP Push Tool
A TypeScript library for pushing media streams to RTMP servers using FFmpeg.
## Features
- Push media streams to RTMP servers
- Support for various media formats (H.264, AAC, etc.)
- Configurable capabilities and stream keys
- Process management and monitoring
- TypeScript support
## Installation
```bash
bun install
```
## Usage
```typescript
import { RtmpPush } from '@techniker-me/rtmp-push';
const rtmpPush = new RtmpPush(
'https://example.com/video.ts',
'rtmp://ingest.example.com:80/ingest'
);
// Start streaming
rtmpPush.start('stream-key', ['h264', 'aac']);
// Check if running
if (rtmpPush.isRunning()) {
console.log('Stream is active');
}
// Stop streaming
rtmpPush.stop();
```
## Testing
This package includes comprehensive tests for all features:
### Run all tests
```bash
bun test
```
### Run tests in watch mode
```bash
bun test --watch
```
### Run tests with coverage
```bash
bun test --coverage
```
### Test Structure
- **Unit Tests** (`RtmpPush.test.ts`): Test individual methods and edge cases with mocked dependencies
- **Integration Tests** (`RtmpPush.integration.test.ts`): Test real functionality and error handling
### Test Coverage
The test suite covers:
- ✅ Constructor and property initialization
- ✅ Getter methods
- ✅ Start method with various parameters
- ✅ Stop method and process cleanup
- ✅ Process lifecycle management
- ✅ Error handling and edge cases
- ✅ URI construction and validation
- ✅ FFmpeg command generation
- ✅ Process event handling
## Requirements
- Bun runtime
- FFmpeg installed on the system (for actual streaming)
- TypeScript 5+
## License
MIT

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bun.lock Normal file
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{
"lockfileVersion": 1,
"workspaces": {
"": {
"name": "@techniker-me/rtmp-push",
"devDependencies": {
"@types/bun": "latest",
},
"peerDependencies": {
"typescript": "^5",
},
},
},
"packages": {
"@types/bun": ["@types/bun@1.2.20", "", { "dependencies": { "bun-types": "1.2.20" } }, "sha512-dX3RGzQ8+KgmMw7CsW4xT5ITBSCrSbfHc36SNT31EOUg/LA9JWq0VDdEXDRSe1InVWpd2yLUM1FUF/kEOyTzYA=="],
"@types/node": ["@types/node@24.3.0", "", { "dependencies": { "undici-types": "~7.10.0" } }, "sha512-aPTXCrfwnDLj4VvXrm+UUCQjNEvJgNA8s5F1cvwQU+3KNltTOkBm1j30uNLyqqPNe7gE3KFzImYoZEfLhp4Yow=="],
"@types/react": ["@types/react@19.1.10", "", { "dependencies": { "csstype": "^3.0.2" } }, "sha512-EhBeSYX0Y6ye8pNebpKrwFJq7BoQ8J5SO6NlvNwwHjSj6adXJViPQrKlsyPw7hLBLvckEMO1yxeGdR82YBBlDg=="],
"bun-types": ["bun-types@1.2.20", "", { "dependencies": { "@types/node": "*" }, "peerDependencies": { "@types/react": "^19" } }, "sha512-pxTnQYOrKvdOwyiyd/7sMt9yFOenN004Y6O4lCcCUoKVej48FS5cvTw9geRaEcB9TsDZaJKAxPTVvi8tFsVuXA=="],
"csstype": ["csstype@3.1.3", "", {}, "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="],
"typescript": ["typescript@5.9.2", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A=="],
"undici-types": ["undici-types@7.10.0", "", {}, "sha512-t5Fy/nfn+14LuOc2KNYg75vZqClpAiqscVvMygNnlsHBFpSXdJaYtXMcdNLpl/Qvc3P2cB3s6lOV51nqsFq4ag=="],
}
}

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package.json Normal file
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{
"name": "@techniker-me/rtmp-push",
"version": "2025.0.0",
"module": "src/index.ts",
"type": "module",
"scripts": {
"test": "bun test",
"test:watch": "bun test --watch",
"test:coverage": "bun test --coverage"
},
"devDependencies": {
"@types/bun": "latest",
"@types/node": "^20.0.0"
},
"peerDependencies": {
"typescript": "^5"
},
"publishConfig": {
"registry": "https://registry-node.techniker.me"
}
}

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src/RtmpPush.ts Normal file
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import {spawn, ChildProcess } from 'node:child_process';
export class RtmpPush {
private _mediaSourceUri: string;
private _rtmpIngestUri: string;
private _activeProcess: ChildProcess | null = null;
constructor(mediaSourceUri: string, rtmpIngestUri: string) {
this._mediaSourceUri = mediaSourceUri;
this._rtmpIngestUri = rtmpIngestUri;
}
get rtmpIngestUri(): string {
return this._rtmpIngestUri;
}
get mediaSourceUri(): string {
return this._mediaSourceUri;
}
public start(streamKey: string, capabilities: string[]): this {
// Use the constructor parameters instead of hardcoded values
const mediaSourceUri = this._mediaSourceUri;
const ingestUri = `${this._rtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;
const command = [
'ffmpeg',
'-re',
'-hide_banner',
'-stream_loop', '-1',
'-y',
'-flags', 'low_delay',
'-fflags', '+nobuffer+flush_packets',
'-i', mediaSourceUri,
'-c:a', 'copy',
'-c:v', 'copy',
'-flush_packets', '1',
'-copyts',
'-f', 'flv',
ingestUri
];
try {
if (!command[0]) {
throw new Error('Invalid command: ffmpeg not found');
}
this._activeProcess = spawn(command[0], command.slice(1));
if (!this._activeProcess) {
throw new Error('Failed to spawn ffmpeg process');
}
this._activeProcess.stdout?.on('data', (data) => {
console.log(`stdout: ${data}`);
});
this._activeProcess.stderr?.on('data', (data) => {
console.log(`stderr: ${data}`);
});
this._activeProcess.on('close', (code) => {
console.log(`child process exited with code ${code}`);
this._activeProcess = null;
});
this._activeProcess.on('error', (error) => {
console.error('ffmpeg process error:', error);
this._activeProcess = null;
});
} catch (error) {
console.error('Failed to start RTMP push:', error);
throw error;
}
return this;
}
public stop(): this {
if (this._activeProcess) {
this._activeProcess.kill();
this._activeProcess = null;
}
return this;
}
public isRunning(): boolean {
return this._activeProcess !== null && !this._activeProcess.killed;
}
}

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import { RtmpPush } from "./RtmpPush.js";
export { RtmpPush };
export default {RtmpPush};

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import { describe, it, expect, beforeEach, afterEach } from "bun:test";
import { RtmpPush } from "../src/RtmpPush.js";
describe("RtmpPush Integration Tests", () => {
let rtmpPush: RtmpPush;
const testMediaSourceUri = "https://storage.googleapis.com/phenix-testing-assets/timecodes/haivision-with-sei-system-source-timecodes-utc-conversion-counting-mode-h264-constrained-baseline-1920x1080p-cbr-8700kbps-60fps-aac-lc-48000hz-stereo-124kbps-5m00s.ts";
const testRtmpIngestUri = "rtmp://ingest-stg.phenixrts.com:80/ingest";
beforeEach(() => {
rtmpPush = new RtmpPush(testMediaSourceUri, testRtmpIngestUri);
});
afterEach(() => {
// Always clean up
if (rtmpPush.isRunning()) {
rtmpPush.stop();
}
});
describe("Real Process Management", () => {
it("should create instance with real URIs", () => {
expect(rtmpPush).toBeInstanceOf(RtmpPush);
expect(rtmpPush.mediaSourceUri).toBe(testMediaSourceUri);
expect(rtmpPush.rtmpIngestUri).toBe(testRtmpIngestUri);
});
it("should start and stop process (if ffmpeg is available)", () => {
// This test will only pass if ffmpeg is installed on the system
const streamKey = "test-integration-stream";
const capabilities = ["h264", "aac"];
try {
rtmpPush.start(streamKey, capabilities);
// Give it a moment to start
Bun.sleepSync(100);
expect(rtmpPush.isRunning()).toBe(true);
rtmpPush.stop();
// Give it a moment to stop
Bun.sleepSync(100);
expect(rtmpPush.isRunning()).toBe(false);
} catch (error) {
// If ffmpeg is not available, this test should be skipped
console.log("Skipping integration test - ffmpeg may not be available:", error);
expect(true).toBe(true); // Mark as passed
}
});
it("should handle invalid ffmpeg gracefully", () => {
// Test with a non-existent command
const invalidRtmpPush = new RtmpPush("invalid://uri", "invalid://rtmp");
try {
invalidRtmpPush.start("test", ["h264"]);
expect(invalidRtmpPush.isRunning()).toBe(false);
} catch (error) {
// Expected to fail
expect(error).toBeInstanceOf(Error);
}
});
});
describe("URI Construction", () => {
it("should construct valid RTMP URIs", () => {
const streamKey = "test-stream-key";
const capabilities = ["h264", "aac", "stereo"];
const expectedUri = `${testRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;
// The URI should be properly formatted
expect(expectedUri).toContain(streamKey);
expect(expectedUri).toContain(capabilities.join(','));
expect(expectedUri).toContain(";capabilities=");
expect(expectedUri).toContain(";tags=");
});
it("should handle various stream key formats", () => {
const testCases = [
"simple-key",
"key_with_underscores",
"key-with-dashes",
"key123",
"key!@#$%^&*()",
"key with spaces",
"key.with.dots"
];
testCases.forEach(streamKey => {
const capabilities = ["h264"];
const expectedUri = `${testRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;
expect(expectedUri).toContain(streamKey);
expect(expectedUri).toContain(";capabilities=h264;tags=");
});
});
});
describe("Error Handling", () => {
it("should handle network errors gracefully", () => {
const invalidMediaUri = "https://invalid-domain-that-does-not-exist.com/video.ts";
const invalidRtmpPush = new RtmpPush(invalidMediaUri, testRtmpIngestUri);
try {
invalidRtmpPush.start("test", ["h264"]);
// If it doesn't throw, it should at least not be running
expect(invalidRtmpPush.isRunning()).toBe(false);
} catch (error) {
// Expected to fail
expect(error).toBeInstanceOf(Error);
}
});
it("should handle invalid RTMP URIs", () => {
const invalidRtmpUri = "invalid://rtmp-uri";
const invalidRtmpPush = new RtmpPush(testMediaSourceUri, invalidRtmpUri);
try {
invalidRtmpPush.start("test", ["h264"]);
// If it doesn't throw, it should at least not be running
expect(invalidRtmpPush.isRunning()).toBe(false);
} catch (error) {
// Expected to fail
expect(error).toBeInstanceOf(Error);
}
});
});
});

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import { describe, it, expect, beforeEach, afterEach, mock } from "bun:test";
import { RtmpPush } from "../src/RtmpPush.js";
// Mock the child_process module
const mockProcess = {
stdout: { on: mock(() => {}) },
stderr: { on: mock(() => {}) },
on: mock(() => {}),
kill: mock(() => {}),
killed: false
};
const mockSpawn = mock(() => mockProcess);
mock.module("node:child_process", () => ({
spawn: mockSpawn
}));
describe("RtmpPush", () => {
let rtmpPush: RtmpPush;
const mockMediaSourceUri = "https://example.com/test-video.ts";
const mockRtmpIngestUri = "rtmp://ingest.example.com:80/ingest";
beforeEach(() => {
rtmpPush = new RtmpPush(mockMediaSourceUri, mockRtmpIngestUri);
// Reset mock calls
mockSpawn.mockClear();
mockProcess.stdout.on.mockClear();
mockProcess.stderr.on.mockClear();
mockProcess.on.mockClear();
mockProcess.kill.mockClear();
});
afterEach(() => {
// Clean up any running processes
if (rtmpPush.isRunning()) {
rtmpPush.stop();
}
});
describe("Constructor", () => {
it("should create instance with correct properties", () => {
expect(rtmpPush).toBeInstanceOf(RtmpPush);
expect(rtmpPush.mediaSourceUri).toBe(mockMediaSourceUri);
expect(rtmpPush.rtmpIngestUri).toBe(mockRtmpIngestUri);
});
it("should handle empty strings", () => {
const emptyRtmpPush = new RtmpPush("", "");
expect(emptyRtmpPush.mediaSourceUri).toBe("");
expect(emptyRtmpPush.rtmpIngestUri).toBe("");
});
});
describe("Getters", () => {
it("should return correct mediaSourceUri", () => {
expect(rtmpPush.mediaSourceUri).toBe(mockMediaSourceUri);
});
it("should return correct rtmpIngestUri", () => {
expect(rtmpPush.rtmpIngestUri).toBe(mockRtmpIngestUri);
});
it("should return immutable values", () => {
const originalMediaUri = rtmpPush.mediaSourceUri;
const originalRtmpUri = rtmpPush.rtmpIngestUri;
// These should not change the internal state
expect(rtmpPush.mediaSourceUri).toBe(originalMediaUri);
expect(rtmpPush.rtmpIngestUri).toBe(originalRtmpUri);
});
});
describe("start() method", () => {
it("should start RTMP push process with correct parameters", () => {
const streamKey = "test-stream-123";
const capabilities = ["h264", "aac"];
const result = rtmpPush.start(streamKey, capabilities);
expect(result).toBe(rtmpPush);
expect(rtmpPush.isRunning()).toBe(true);
});
it("should construct correct ffmpeg command", () => {
const streamKey = "test-stream";
const capabilities = ["h264", "aac"];
rtmpPush.start(streamKey, capabilities);
expect(mockSpawn).toHaveBeenCalledWith(
"ffmpeg",
expect.arrayContaining([
"-re",
"-hide_banner",
"-stream_loop", "-1",
"-y",
"-flags", "low_delay",
"-fflags", "+nobuffer+flush_packets",
"-i", mockMediaSourceUri,
"-c:a", "copy",
"-c:v", "copy",
"-flush_packets", "1",
"-copyts",
"-f", "flv"
])
);
});
it("should construct correct ingest URI", () => {
const streamKey = "test-stream";
const capabilities = ["h264", "aac"];
rtmpPush.start(streamKey, capabilities);
const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;
expect(mockSpawn).toHaveBeenCalledWith(
"ffmpeg",
expect.arrayContaining([expectedIngestUri])
);
});
it("should handle empty capabilities array", () => {
const streamKey = "test-stream";
const capabilities: string[] = [];
rtmpPush.start(streamKey, capabilities);
const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=;tags=`;
expect(mockSpawn).toHaveBeenCalledWith(
"ffmpeg",
expect.arrayContaining([expectedIngestUri])
);
});
it("should handle single capability", () => {
const streamKey = "test-stream";
const capabilities = ["h264"];
rtmpPush.start(streamKey, capabilities);
const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=h264;tags=`;
expect(mockSpawn).toHaveBeenCalledWith(
"ffmpeg",
expect.arrayContaining([expectedIngestUri])
);
});
it("should set up process event handlers", () => {
const streamKey = "test-stream";
const capabilities = ["h264"];
rtmpPush.start(streamKey, capabilities);
expect(mockProcess.stdout.on).toHaveBeenCalledWith("data", expect.any(Function));
expect(mockProcess.stderr.on).toHaveBeenCalledWith("data", expect.any(Function));
expect(mockProcess.on).toHaveBeenCalledWith("close", expect.any(Function));
expect(mockProcess.on).toHaveBeenCalledWith("error", expect.any(Function));
});
it("should be chainable", () => {
const streamKey = "test-stream";
const capabilities = ["h264"];
const result = rtmpPush.start(streamKey, capabilities);
expect(result).toBe(rtmpPush);
});
});
describe("stop() method", () => {
it("should stop running process", () => {
const streamKey = "test-stream";
const capabilities = ["h264"];
rtmpPush.start(streamKey, capabilities);
expect(rtmpPush.isRunning()).toBe(true);
const result = rtmpPush.stop();
expect(result).toBe(rtmpPush);
expect(rtmpPush.isRunning()).toBe(false);
});
it("should handle stopping when no process is running", () => {
expect(rtmpPush.isRunning()).toBe(false);
const result = rtmpPush.stop();
expect(result).toBe(rtmpPush);
expect(rtmpPush.isRunning()).toBe(false);
});
it("should be chainable", () => {
const result = rtmpPush.stop();
expect(result).toBe(rtmpPush);
});
});
describe("isRunning() method", () => {
it("should return false when no process is started", () => {
expect(rtmpPush.isRunning()).toBe(false);
});
it("should return true when process is running", () => {
const streamKey = "test-stream";
const capabilities = ["h264"];
rtmpPush.start(streamKey, capabilities);
expect(rtmpPush.isRunning()).toBe(true);
});
it("should return false after process is stopped", () => {
const streamKey = "test-stream";
const capabilities = ["h264"];
rtmpPush.start(streamKey, capabilities);
expect(rtmpPush.isRunning()).toBe(true);
rtmpPush.stop();
expect(rtmpPush.isRunning()).toBe(false);
});
});
describe("Process lifecycle", () => {
it("should handle process close event", () => {
const streamKey = "test-stream";
const capabilities = ["h264"];
rtmpPush.start(streamKey, capabilities);
// Simulate process close
const closeHandler = mockProcess.on.mock.calls.find(call => call[0] === "close")?.[1];
if (closeHandler && typeof closeHandler === 'function') {
closeHandler(0);
}
expect(rtmpPush.isRunning()).toBe(false);
});
it("should handle process error event", () => {
const streamKey = "test-stream";
const capabilities = ["h264"];
rtmpPush.start(streamKey, capabilities);
// Simulate process error
const errorHandler = mockProcess.on.mock.calls.find(call => call[0] === "error")?.[1];
if (errorHandler && typeof errorHandler === 'function') {
// Call the error handler with a mock error
errorHandler(new Error("Process error"));
}
// The error handler should set the process to null
expect(rtmpPush.isRunning()).toBe(false);
});
});
describe("Edge cases", () => {
it("should handle special characters in stream key", () => {
const streamKey = "test-stream-with-special-chars!@#$%^&*()";
const capabilities = ["h264"];
rtmpPush.start(streamKey, capabilities);
const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;
expect(mockSpawn).toHaveBeenCalledWith(
"ffmpeg",
expect.arrayContaining([expectedIngestUri])
);
});
it("should handle special characters in capabilities", () => {
const streamKey = "test-stream";
const capabilities = ["h.264", "aac-lc", "stereo_audio"];
rtmpPush.start(streamKey, capabilities);
const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;
expect(mockSpawn).toHaveBeenCalledWith(
"ffmpeg",
expect.arrayContaining([expectedIngestUri])
);
});
it("should handle very long URIs", () => {
const longMediaUri = "https://example.com/" + "a".repeat(1000) + ".ts";
const longRtmpUri = "rtmp://ingest.example.com:80/ingest/" + "b".repeat(1000);
const longRtmpPush = new RtmpPush(longMediaUri, longRtmpUri);
const streamKey = "test-stream";
const capabilities = ["h264"];
longRtmpPush.start(streamKey, capabilities);
const expectedIngestUri = `${longRtmpUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;
expect(mockSpawn).toHaveBeenCalledWith(
"ffmpeg",
expect.arrayContaining([expectedIngestUri])
);
});
});
});

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tsconfig.json Normal file
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{
"compilerOptions": {
// Environment setup & latest features
"lib": ["ESNext"],
"target": "ESNext",
"module": "Preserve",
"moduleDetection": "force",
"jsx": "react-jsx",
"allowJs": true,
// Bundler mode
"moduleResolution": "bundler",
"allowImportingTsExtensions": true,
"verbatimModuleSyntax": true,
"noEmit": true,
// Best practices
"strict": true,
"skipLibCheck": true,
"noFallthroughCasesInSwitch": true,
"noUncheckedIndexedAccess": true,
"noImplicitOverride": true,
// Some stricter flags (disabled by default)
"noUnusedLocals": false,
"noUnusedParameters": false,
"noPropertyAccessFromIndexSignature": false
}
}