Kill FFMPEG after stream is closed (#582)

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- There are no longer FFMPEG orphan processes after listening to a livestream
 
 ## [1.6.1] - 2022-03-15
 ### Fixed

src/services/player.ts

@@ -527,14 +527,18 @@ export default class {
         capacitor.createReadStream().pipe(cacheStream);
       }
 
+      const returnedStream = capacitor.createReadStream();
+      let hasReturnedStreamClosed = false;
+
       const stream = ffmpeg(url)
         .inputOptions(options?.ffmpegInputOptions ?? ['-re'])
         .noVideo()
         .audioCodec('libopus')
         .outputFormat('webm')
         .on('error', error => {
-          console.error(error);
-          reject(error);
+          if (!hasReturnedStreamClosed) {
+            reject(error);
+          }
         })
         .on('start', command => {
           debug(`Spawned ffmpeg with ${command as string}`);
@@ -542,7 +546,12 @@ export default class {
 
       stream.pipe(capacitor);
 
-      resolve(capacitor.createReadStream());
+      returnedStream.on('close', () => {
+        stream.kill('SIGKILL');
+        hasReturnedStreamClosed = true;
+      });
+
+      resolve(returnedStream);
     });
   }
 }