node.js - 如何在nodejs中使用ffmpeg并将结果通过管道传输到带有spawn的流？

Question

const { spawn } = require('child_process');
const fs = require('fs');
const readStream = fs.createReadStream('./a.h264');
const command = spawn('ffmpeg', ['-i', 'pipe:0', '-c', 'copy', '-o', 'pipe:1']);
const writeStream = fs.createWriteStream('./a.temp.h264');
readStream.pipe(command.stdin);
command.stdout.pipe(writeStream);

我想将流传输到 ffmpeg 并输出到另一个流，如何使用 ffmpeg 并将结果传输到 nodejs 中的 spawn 流？

Answer 1

要从 nodejs 读取文档，我知道是否只有一个流输入，只需这样做:

const { spawn } = require('child_process');
const fs = require('fs');
const readStream = fs.createReadStream('./a.h264');
const command = spawn('ffmpeg', ['-i', 'pipe:0', '-c', 'copy', 'pipe:1'],{
  stdio: ['pipe','pipe','ignore']
});
const writeStream = fs.createWriteStream('./b.h264');
readStream.pipe(command.stdin);
command.stdout.pipe(writeStream);