Timeline virtual scrolling

src/components/video_attachment/video_attachment.js

@@ -3,27 +3,48 @@ const VideoAttachment = {
   props: ['attachment', 'controls'],
   data () {
     return {
-      loopVideo: this.$store.getters.mergedConfig.loopVideo
+      blocksSuspend: false,
+      // Start from true because removing "loop" property seems buggy in Vue
+      hasAudio: true
+    }
+  },
+  computed: {
+    loopVideo () {
+      if (this.$store.getters.mergedConfig.loopVideoSilentOnly) {
+        return !this.hasAudio
+      }
+      return this.$store.getters.mergedConfig.loopVideo
     }
   },
   methods: {
-    onVideoDataLoad (e) {
+    onPlaying (e) {
+      this.setHasAudio(e)
+      if (this.loopVideo) {
+        this.$emit('play', { looping: true })
+        return
+      }
+      this.$emit('play')
+    },
+    onPaused (e) {
+      this.$emit('pause')
+    },
+    setHasAudio (e) {
       const target = e.srcElement || e.target
+      // If hasAudio is false, we've already marked this video to not have audio,
+      // a video can't gain audio out of nowhere so don't bother checking again.
+      if (!this.hasAudio) return
       if (typeof target.webkitAudioDecodedByteCount !== 'undefined') {
         // non-zero if video has audio track
-        if (target.webkitAudioDecodedByteCount > 0) {
-          this.loopVideo = this.loopVideo && !this.$store.getters.mergedConfig.loopVideoSilentOnly
-        }
-      } else if (typeof target.mozHasAudio !== 'undefined') {
-        // true if video has audio track
-        if (target.mozHasAudio) {
-          this.loopVideo = this.loopVideo && !this.$store.getters.mergedConfig.loopVideoSilentOnly
-        }
-      } else if (typeof target.audioTracks !== 'undefined') {
-        if (target.audioTracks.length > 0) {
-          this.loopVideo = this.loopVideo && !this.$store.getters.mergedConfig.loopVideoSilentOnly
-        }
+        if (target.webkitAudioDecodedByteCount > 0) return
       }
+      if (typeof target.mozHasAudio !== 'undefined') {
+        // true if video has audio track
+        if (target.mozHasAudio) return
+      }
+      if (typeof target.audioTracks !== 'undefined') {
+        if (target.audioTracks.length > 0) return
+      }
+      this.hasAudio = false
     }
   }
 }

src/components/video_attachment/video_attachment.vue

@@ -7,7 +7,8 @@
     :alt="attachment.description"
     :title="attachment.description"
     playsinline
-    @loadeddata="onVideoDataLoad"
+    @playing="onPlaying"
+    @pause="onPaused"
   />
 </template>