Fix Worker.terminate()

Author: jeromewu

docs/api.md

@@ -10,6 +10,7 @@
   - [Worker.trim](#worker-trim)
   - [Worker.concatDemuxer](#worker-concatDemuxer)
   - [Worker.run](#worker-run)
+  - [Worker.terminate](#worker-terminate)
 
 ---
 
@@ -230,3 +231,17 @@ Worker.run() is similar to FFmpeg cli tool, aims to provide maximum flexiblity f
   await worker.run("-i flame.avi -s 1920x1080 output.mp4");
 })();
 ```
+
+<a name="worker-run"></a>
+
+### Worker.terminate(): Promise
+
+Worker.terminate() terminates web worker / worker\_threads, after terminate(), you cannot use this worker anymore.
+
+**Examples:**
+
+```javascript
+(async () => {
+  await worker.terminate();
+})();
+```

examples/browser/concatDemuxer.html

@@ -49,6 +49,7 @@ <h3>Select multiple video files to Concatenate</h3>
             type: "video/mp4"
           })
         );
+        await worker.terminate();
       };
       const elm = document.getElementById("uploader");
       elm.addEventListener("change", transcode);

examples/browser/image2video.html

@@ -48,6 +48,7 @@ <h3>Click start to transcode images to mp4 (x264) and play!</h3>
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
       const elm = document.getElementById('start-btn');
       elm.addEventListener('click', image2video);

examples/browser/run.html

@@ -33,12 +33,13 @@ <h3>Upload a video to transcode to mp4 (x264) and play!</h3>
         await worker.load();
         message.innerHTML = 'Start transcoding';
         await worker.write(name, files[0]);
-        await worker.run(`-i /data/${name} output.mp4`, { input: name, output: 'output.mp4' });
+        await worker.run(`-i /data/${name} output.mp4`);
         message.innerHTML = 'Complete transcoding';
         const { data } = await worker.read('output.mp4');
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
       const elm = document.getElementById('uploader');
       elm.addEventListener('change', transcode);

examples/browser/transcode.html

@@ -40,6 +40,7 @@ <h3>Upload a video to transcode to mp4 (x264) and play!</h3>
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
       const elm = document.getElementById('uploader');
       elm.addEventListener('change', transcode);

examples/browser/trim.html

@@ -39,6 +39,7 @@ <h3>Upload a mp4 (x264) video and trim its first 10 seconds and play!</h3>
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
       const elm = document.getElementById('uploader');
       elm.addEventListener('change', transcode);

examples/browser/webcam.html

@@ -69,6 +69,7 @@ <h3>Record video from webcam and transcode to mp4 (x264) and play!</h3>
 
         const video = document.getElementById('output-video');
         video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
+        await worker.terminate();
       }
     </script>
   </body>

examples/node/concatDemuxer.js

@@ -13,5 +13,5 @@ const worker = createWorker({
   const { data } = await worker.read('flame.mp4');
   console.log('Complete concat');
   fs.writeFileSync('flame.mp4', Buffer.from(data));
-  process.exit(0);
+  await worker.terminate();
 })();

examples/node/image2video.js

@@ -24,5 +24,5 @@ const worker = createWorker({
     await worker.remove(`tmp.${num}.png`);
   }
   fs.writeFileSync('out.mp4', Buffer.from(data));
-  process.exit(0);
+  await worker.terminate();
 })();

examples/node/run.js

@@ -13,5 +13,5 @@ const worker = createWorker({
   const { data } = await worker.read('flame.mp4');
   console.log('Complete transcoding');
   fs.writeFileSync('flame.mp4', Buffer.from(data));
-  process.exit(0);
+  await worker.terminate();
 })();