Function pipeThrough

pipeThrough(opts: PipeOptions): PipeProcess

Pipe data through ffmpeg — input from a stream, output to a stream.

Parameters

opts: PipeOptions

Returns PipeProcess

Example

// Transcode a readable stream to a writable stream
const proc = pipeThrough({
  inputFormat: 'mp4',
  outputArgs: ['-c:v', 'libx264', '-c:a', 'aac'],
  outputFormat: 'mp4',
});
fsReadStream.pipe(proc.stdin!);
proc.stdout.pipe(fsWriteStream);
await new Promise((res, rej) => {
  proc.emitter.on('end', res);
  proc.emitter.on('error', rej);
});

Example

// Pass a readable stream directly
const proc = pipeThrough({ inputStream: myReadable, outputFormat: 'ogg' });
proc.stdout.pipe(response); // stream to HTTP response