Update node.js examples

Author: jeromewu

examples/node/concatDemuxer.js

@@ -8,6 +8,6 @@ const ffmpeg = createFFmpeg({ log: true });
   ffmpeg.FS('writeFile', 'flame.avi', await fetchFile('../assets/flame.avi'));
   ffmpeg.FS('writeFile', 'concat_list.txt', 'file flame.avi\nfile flame.avi');
   await ffmpeg.run('-f', 'concat', '-safe', '0', '-i', 'concat_list.txt', 'flame.mp4');
-  fs.writeFileSync('flame.mp4', ffmpeg.FS('readFile', 'flame.mp4'));
+  await fs.promises.writeFile('flame.mp4', ffmpeg.FS('readFile', 'flame.mp4'));
   process.exit(0);
 })();

examples/node/hstack.js

@@ -7,6 +7,6 @@ const ffmpeg = createFFmpeg({ log: true });
   await ffmpeg.load();
   ffmpeg.FS('writeFile', 'flame.avi', await fetchFile('../assets/flame.avi'));
   await ffmpeg.run('-i', 'flame.avi', '-i', 'flame.avi', '-filter_complex', 'hstack', 'flame.mp4');
-  fs.writeFileSync('flame.mp4', ffmpeg.FS('readFile', 'flame.mp4'));
+  await fs.promises.writeFile('flame.mp4', ffmpeg.FS('readFile', 'flame.mp4'));
   process.exit(0);
 })();

examples/node/image2video.js

@@ -17,6 +17,6 @@ const ffmpeg = createFFmpeg({ log: true });
     const num = `00${i}`.slice(-3);
     await ffmpeg.FS('unlink', `tmp.${num}.png`);
   }
-  fs.writeFileSync('out.mp4', ffmpeg.FS('readFile', 'out.mp4'));
+  await fs.promises.writeFile('out.mp4', ffmpeg.FS('readFile', 'out.mp4'));
   process.exit(0);
 })();

examples/node/multiple-output.js

@@ -7,9 +7,8 @@ const ffmpeg = createFFmpeg({ log: true });
   await ffmpeg.load();
   ffmpeg.FS('writeFile', 'flame.avi', await fetchFile('../assets/flame.avi'));
   await ffmpeg.run('-i', 'flame.avi', '-map', '0:v', '-r', '25', 'out_%06d.bmp');
-  ffmpeg.FS('readdir', '/').filter((p) => p.endsWith('.bmp')).forEach((p) => {
-    fs.writeFileSync(p, ffmpeg.FS('readFile', p));
+  ffmpeg.FS('readdir', '/').filter((p) => p.endsWith('.bmp')).forEach(async (p) => {
+    await fs.promises.writeFile(p, ffmpeg.FS('readFile', p));
   });
-
   process.exit(0);
 })();

examples/node/transcode.js

@@ -9,7 +9,6 @@ const ffmpeg = createFFmpeg({
   await ffmpeg.load();
   ffmpeg.FS('writeFile', 'flame.avi', await fetchFile('../assets/flame.avi'));
   await ffmpeg.run('-i', 'flame.avi', 'flame.mp4');
-  const data = ffmpeg.FS('readFile', 'flame.mp4');
-  fs.writeFileSync('flame.mp4', Buffer.from(data));
+  await fs.promises.writeFile('flame.mp4', ffmpeg.FS('readFile', 'flame.mp4'));
   process.exit(0);
 })();

examples/node/trim.js

@@ -7,6 +7,6 @@ const ffmpeg = createFFmpeg({ log: true });
   await ffmpeg.load();
   ffmpeg.FS('writeFile', 'flame.avi', await fetchFile('../assets/flame.avi'));
   await ffmpeg.run('-i', 'flame.avi', '-ss', '0', '-to', '1', 'flame_trim.avi');
-  fs.writeFileSync('flame_trim.avi', ffmpeg.FS('readFile', 'flame_trim.avi'));
+  await fs.promises.writeFile('flame_trim.avi', ffmpeg.FS('readFile', 'flame_trim.avi'));
   process.exit(0);
 })();