From 52fa523df10f2179751811d5bda8da0da2feb4f8 Mon Sep 17 00:00:00 2001
From: kuhaku <randshot@norealm.xyz>
Date: Sun, 13 Jun 2021 15:31:43 +0000
Subject: [PATCH] Add support for External Players (closes #418) (#1271)

* feat: add support for opening videos/playlists in external players (like mpv) #418

Signed-off-by: Randshot <randshot@norealm.xyz>

* feat: move external player settings into own section
feat: add warnings for when the external player doesn't support the current action (e.g. reversing playlists)
feat: add toggle in settings for ignoring unsupported action warnings

Signed-off-by: Randshot <randshot@norealm.xyz>

* improvement: do not append start offset argument when the watch progress is 0

Signed-off-by: Randshot <randshot@norealm.xyz>

* fix: fix undefined showToast error when clicking on the external player playlist button

Signed-off-by: Randshot <randshot@norealm.xyz>

* feat: add icon button for external player to watch-video-info (below video player) component
improvement: refactor the code for opening the external player into a separate function in utils.js

Signed-off-by: Randshot <randshot@norealm.xyz>

* feat: add support for ytdl protocol urls (supportsYtdlProtocol)
chore: fix lint error

Signed-off-by: Randshot <randshot@norealm.xyz>

* feat: add support for passing default playback rate to external player
improvement: add warning message for when the external player does not support starting playback at
             a given offset
chore: rename reverse, shuffle, and loopPlaylist fields for consistency

Signed-off-by: Randshot <randshot@norealm.xyz>

* feat: add setting for custom external player command line arguments

Signed-off-by: Randshot <randshot@norealm.xyz>

* chore: fix lint error

Signed-off-by: Randshot <randshot@norealm.xyz>

* improvement(watch-video-info.js): change the default for playlistId back to null (consistent with other occurrences)
improvement(utils.js/openInExternalPlayer): also check for empty playlistId string
fix(watch-video-info.js): fix merge error

Signed-off-by: Randshot <randshot@norealm.xyz>

* improvement(components/ft-list-video): check whether watch history is turned on, before adding a video to it
fix(store/utils): fix playlistReverse typo, causing `undefined` being set as a command line argument
fix(store/utils): check for 'string' type, instead of `null` and `undefined`
fix(views/Watch): fix getPlaylistIndex returning an incorrect index, when reverse was turned on
chore(locales/en-US): fix thumbnail and suppress typo
chore(locales/en_GB): fix thumbnail and suppress typo

Signed-off-by: Randshot <randshot@norealm.xyz>

* feat: pause player when opening video in external player

Signed-off-by: Randshot <randshot@norealm.xyz>

* feat(externalPlayer): refactor externalPlayerCmdArguments into a separate static file `static/external-player-map.json`
chore(components/ft-list-video): fix lint error

Signed-off-by: Randshot <randshot@norealm.xyz>

* Revert "feat: pause player when opening video in external player"

This reverts commit 28b4713334bf941be9e403abf517bb4b89beb04f.

* feat: pause the app's player when opening video in external player

* This commit addresses above requested changes.

improvement(components/external-player-settings): move `externalPlayer` check to `ft-flex-box`
improvement(components/external-player-settings): use `update*` methods, instead of `handle*`

improvement(store/utils): move child_process invocation to `main/index.js` via IPC call to renderer
improvement(store/utils): use `dispatch` for calling actions
improvement(store/utils): get external player related settings directly in the action

improvement(renderer/App): move `checkExternalPlayer` call down into `usingElectron` if statement
fix(renderer/App): fix lint error

improvement(components/ft-list-playlist): remove unnecessary payload fields
fix(components/ft-list-playlist): fix typo in component name

improvement(components/ft-list-video): remove unnecessary payload fields

improvement(components/watch-video-info): remove unnecessary payload fields
improvement(views/Settings): add `usingElectron` condition

Signed-off-by: Randshot <randshot@norealm.xyz>

* fix(store/utils): fix toast message error

Signed-off-by: Randshot <randshot@norealm.xyz>

* fix(store/utils): fix a few code mess-ups

Co-authored-by: Svallinn <41585298+Svallinn@users.noreply.github.com>
---
 src/main/index.js                             |   6 +
 src/renderer/App.js                           |  17 +-
 .../external-player-settings.js               |  53 +++++
 .../external-player-settings.sass             |   1 +
 .../external-player-settings.vue              |  56 +++++
 .../ft-list-playlist/ft-list-playlist.js      |  35 ++-
 .../ft-list-playlist/ft-list-playlist.vue     |  10 +
 .../components/ft-list-video/ft-list-video.js |  51 ++++-
 .../ft-list-video/ft-list-video.vue           |  10 +
 .../watch-video-info/watch-video-info.js      |  43 +++-
 .../watch-video-info/watch-video-info.vue     |   8 +
 .../watch-video-playlist.vue                  |   5 +
 src/renderer/sass-partials/_ft-list-item.sass |  10 +
 src/renderer/sass-partials/_settings.sass     |   2 +-
 src/renderer/store/modules/settings.js        |   4 +
 src/renderer/store/modules/utils.js           | 204 +++++++++++++++++-
 src/renderer/views/Playlist/Playlist.vue      |   1 +
 src/renderer/views/Settings/Settings.js       |   7 +
 src/renderer/views/Settings/Settings.vue      |   1 +
 src/renderer/views/Watch/Watch.js             |  27 +++
 src/renderer/views/Watch/Watch.vue            |   8 +-
 static/external-player-map.json               |  23 ++
 static/locales/en-US.yaml                     |  33 +++
 static/locales/en_GB.yaml                     |  35 +++
 24 files changed, 641 insertions(+), 9 deletions(-)
 create mode 100644 src/renderer/components/external-player-settings/external-player-settings.js
 create mode 100644 src/renderer/components/external-player-settings/external-player-settings.sass
 create mode 100644 src/renderer/components/external-player-settings/external-player-settings.vue
 create mode 100644 static/external-player-map.json

diff --git a/src/main/index.js b/src/main/index.js
index a5c0c534..910d205c 100644
--- a/src/main/index.js
+++ b/src/main/index.js
@@ -4,6 +4,7 @@ import {
 } from 'electron'
 import Datastore from 'nedb'
 import path from 'path'
+import cp from 'child_process'
 
 if (process.argv.includes('--version')) {
   console.log(`v${app.getVersion()}`)
@@ -397,6 +398,11 @@ function runApp() {
     }
   })
 
+  ipcMain.on('openInExternalPlayer', (_, payload) => {
+    const child = cp.spawn(payload.executable, payload.args, { detached: true, stdio: 'ignore' })
+    child.unref()
+  })
+
   app.on('window-all-closed', () => {
     if (process.platform !== 'darwin') {
       app.quit()
diff --git a/src/renderer/App.js b/src/renderer/App.js
index 11af0ef6..fed5bf3a 100644
--- a/src/renderer/App.js
+++ b/src/renderer/App.js
@@ -76,6 +76,9 @@ export default Vue.extend({
     },
     defaultProfile: function () {
       return this.$store.getters.getDefaultProfile
+    },
+    externalPlayer: function () {
+      return this.$store.getters.getExternalPlayer
     }
   },
   mounted: function () {
@@ -87,8 +90,6 @@ export default Vue.extend({
         this.checkThemeSettings()
         await this.checkLocale()
 
-        this.dataReady = true
-
         if (this.usingElectron) {
           console.log('User is using Electron')
           ipcRenderer = require('electron').ipcRenderer
@@ -96,8 +97,11 @@ export default Vue.extend({
           this.openAllLinksExternally()
           this.enableOpenUrl()
           this.setBoundsOnClose()
+          await this.checkExternalPlayer()
         }
 
+        this.dataReady = true
+
         setTimeout(() => {
           this.checkForNewUpdates()
           this.checkForNewBlogPosts()
@@ -230,6 +234,14 @@ export default Vue.extend({
       }
     },
 
+    checkExternalPlayer: async function () {
+      const payload = {
+        isDev: this.isDev,
+        externalPlayer: this.externalPlayer
+      }
+      this.getExternalPlayerCmdArgumentsData(payload)
+    },
+
     handleUpdateBannerClick: function (response) {
       if (response !== false) {
         this.showReleaseNotes = true
@@ -406,6 +418,7 @@ export default Vue.extend({
       'getRegionData',
       'getYoutubeUrlInfo',
       'getLocale',
+      'getExternalPlayerCmdArgumentsData',
       'setUpListenerToSyncSettings'
     ])
   }
diff --git a/src/renderer/components/external-player-settings/external-player-settings.js b/src/renderer/components/external-player-settings/external-player-settings.js
new file mode 100644
index 00000000..62a15040
--- /dev/null
+++ b/src/renderer/components/external-player-settings/external-player-settings.js
@@ -0,0 +1,53 @@
+import Vue from 'vue'
+import { mapActions } from 'vuex'
+import FtCard from '../ft-card/ft-card.vue'
+import FtSelect from '../ft-select/ft-select.vue'
+import FtInput from '../ft-input/ft-input.vue'
+import FtToggleSwitch from '../ft-toggle-switch/ft-toggle-switch.vue'
+import FtFlexBox from '../ft-flex-box/ft-flex-box.vue'
+
+export default Vue.extend({
+  name: 'ExternalPlayerSettings',
+  components: {
+    'ft-card': FtCard,
+    'ft-select': FtSelect,
+    'ft-input': FtInput,
+    'ft-toggle-switch': FtToggleSwitch,
+    'ft-flex-box': FtFlexBox
+  },
+  data: function () {
+    return {}
+  },
+  computed: {
+    isDev: function () {
+      return process.env.NODE_ENV === 'development'
+    },
+
+    externalPlayerNames: function () {
+      return this.$store.getters.getExternalPlayerNames
+    },
+    externalPlayerValues: function () {
+      return this.$store.getters.getExternalPlayerValues
+    },
+    externalPlayer: function () {
+      return this.$store.getters.getExternalPlayer
+    },
+    externalPlayerExecutable: function () {
+      return this.$store.getters.getExternalPlayerExecutable
+    },
+    externalPlayerIgnoreWarnings: function () {
+      return this.$store.getters.getExternalPlayerIgnoreWarnings
+    },
+    externalPlayerCustomArgs: function () {
+      return this.$store.getters.getExternalPlayerCustomArgs
+    }
+  },
+  methods: {
+    ...mapActions([
+      'updateExternalPlayer',
+      'updateExternalPlayerExecutable',
+      'updateExternalPlayerIgnoreWarnings',
+      'updateExternalPlayerCustomArgs'
+    ])
+  }
+})
diff --git a/src/renderer/components/external-player-settings/external-player-settings.sass b/src/renderer/components/external-player-settings/external-player-settings.sass
new file mode 100644
index 00000000..05cb0dfb
--- /dev/null
+++ b/src/renderer/components/external-player-settings/external-player-settings.sass
@@ -0,0 +1 @@
+@use "../../sass-partials/settings"
diff --git a/src/renderer/components/external-player-settings/external-player-settings.vue b/src/renderer/components/external-player-settings/external-player-settings.vue
new file mode 100644
index 00000000..8a945fea
--- /dev/null
+++ b/src/renderer/components/external-player-settings/external-player-settings.vue
@@ -0,0 +1,56 @@
+<template>
+  <ft-card
+    class="relative card"
+  >
+    <h3
+      class="videoTitle"
+    >
+      {{ $t("Settings.External Player Settings.External Player Settings") }}
+    </h3>
+    <div class="switchColumnGrid">
+      <div class="switchColumn">
+        <ft-select
+          :placeholder="$t('Settings.External Player Settings.External Player')"
+          :value="externalPlayer"
+          :select-names="externalPlayerNames"
+          :select-values="externalPlayerValues"
+          :tooltip="$t('Tooltips.External Player Settings.External Player')"
+          @change="updateExternalPlayer"
+        />
+      </div>
+      <div class="switchColumn">
+        <ft-toggle-switch
+          :label="$t('Settings.External Player Settings.Ignore Unsupported Action Warnings')"
+          :default-value="externalPlayerIgnoreWarnings"
+          :compact="true"
+          :tooltip="$t('Tooltips.External Player Settings.Ignore Warnings')"
+          @change="updateExternalPlayerIgnoreWarnings"
+        />
+      </div>
+    </div>
+    <ft-flex-box
+      v-if="externalPlayer !== ''"
+      class="externalPlayerSettingsFlexBox"
+    >
+      <ft-input
+        :placeholder="$t('Settings.External Player Settings.Custom External Player Executable')"
+        :show-arrow="false"
+        :show-label="true"
+        :value="externalPlayerExecutable"
+        :tooltip="$t('Tooltips.External Player Settings.Custom External Player Executable')"
+        @input="updateExternalPlayerExecutable"
+      />
+      <ft-input
+        :placeholder="$t('Settings.External Player Settings.Custom External Player Arguments')"
+        :show-arrow="false"
+        :show-label="true"
+        :value="externalPlayerCustomArgs"
+        :tooltip="$t('Tooltips.External Player Settings.Custom External Player Arguments')"
+        @input="updateExternalPlayerCustomArgs"
+      />
+    </ft-flex-box>
+  </ft-card>
+</template>
+
+<script src="./external-player-settings.js" />
+<style scoped lang="sass" src="./external-player-settings.sass" />
diff --git a/src/renderer/components/ft-list-playlist/ft-list-playlist.js b/src/renderer/components/ft-list-playlist/ft-list-playlist.js
index 01fcc483..1d941d12 100644
--- a/src/renderer/components/ft-list-playlist/ft-list-playlist.js
+++ b/src/renderer/components/ft-list-playlist/ft-list-playlist.js
@@ -1,7 +1,12 @@
 import Vue from 'vue'
+import FtIconButton from '../ft-icon-button/ft-icon-button.vue'
+import { mapActions } from 'vuex'
 
 export default Vue.extend({
-  name: 'FtListVideo',
+  name: 'FtListPlaylist',
+  components: {
+    'ft-icon-button': FtIconButton
+  },
   props: {
     data: {
       type: Object,
@@ -40,6 +45,14 @@ export default Vue.extend({
       let id = this.channelLink.replace('https://www.youtube.com/user/', '')
       id = id.replace('https://www.youtube.com/channel/', '')
       return id
+    },
+
+    externalPlayer: function () {
+      return this.$store.getters.getExternalPlayer
+    },
+
+    defaultPlayback: function () {
+      return this.$store.getters.getDefaultPlayback
     }
   },
   mounted: function () {
@@ -50,6 +63,20 @@ export default Vue.extend({
     }
   },
   methods: {
+    handleExternalPlayer: function () {
+      this.openInExternalPlayer({
+        strings: this.$t('Video.External Player'),
+        watchProgress: 0,
+        playbackRate: this.defaultPlayback,
+        videoId: null,
+        playlistId: this.playlistId,
+        playlistIndex: null,
+        playlistReverse: null,
+        playlistShuffle: null,
+        playlistLoop: null
+      })
+    },
+
     parseInvidiousData: function () {
       this.title = this.data.title
       this.thumbnail = this.data.playlistThumbnail.replace('https://i.ytimg.com', this.invidiousInstance).replace('hqdefault', 'mqdefault')
@@ -70,6 +97,10 @@ export default Vue.extend({
       this.channelLink = this.data.owner.url
       this.playlistLink = this.data.url
       this.videoCount = this.data.length
-    }
+    },
+
+    ...mapActions([
+      'openInExternalPlayer'
+    ])
   }
 })
diff --git a/src/renderer/components/ft-list-playlist/ft-list-playlist.vue b/src/renderer/components/ft-list-playlist/ft-list-playlist.vue
index 091d576f..f737a989 100644
--- a/src/renderer/components/ft-list-playlist/ft-list-playlist.vue
+++ b/src/renderer/components/ft-list-playlist/ft-list-playlist.vue
@@ -23,6 +23,16 @@
       </div>
     </router-link>
     <div class="info">
+      <ft-icon-button
+        v-if="externalPlayer !== ''"
+        :title="$t('Video.External Player.OpenInTemplate').replace('$', externalPlayer)"
+        icon="external-link-alt"
+        class="externalPlayerButton"
+        theme="base-no-default"
+        :size="16"
+        :use-shadow="false"
+        @click="handleExternalPlayer"
+      />
       <router-link
         class="title"
         :to="`/playlist/${playlistId}`"
diff --git a/src/renderer/components/ft-list-video/ft-list-video.js b/src/renderer/components/ft-list-video/ft-list-video.js
index 498cd8ed..b791d94c 100644
--- a/src/renderer/components/ft-list-video/ft-list-video.js
+++ b/src/renderer/components/ft-list-video/ft-list-video.js
@@ -16,6 +16,22 @@ export default Vue.extend({
       type: String,
       default: null
     },
+    playlistIndex: {
+      type: Number,
+      default: null
+    },
+    playlistReverse: {
+      type: Boolean,
+      default: false
+    },
+    playlistShuffle: {
+      type: Boolean,
+      default: false
+    },
+    playlistLoop: {
+      type: Boolean,
+      default: false
+    },
     forceListType: {
       type: String,
       default: null
@@ -178,6 +194,18 @@ export default Vue.extend({
 
     favoriteIconTheme: function () {
       return this.inFavoritesPlaylist ? 'base favorite' : 'base'
+    },
+
+    externalPlayer: function () {
+      return this.$store.getters.getExternalPlayer
+    },
+
+    defaultPlayback: function () {
+      return this.$store.getters.getDefaultPlayback
+    },
+
+    saveWatchedProgress: function () {
+      return this.$store.getters.getSaveWatchedProgress
     }
   },
   mounted: function () {
@@ -185,6 +213,26 @@ export default Vue.extend({
     this.checkIfWatched()
   },
   methods: {
+    handleExternalPlayer: function () {
+      this.$emit('pause-player')
+
+      this.openInExternalPlayer({
+        strings: this.$t('Video.External Player'),
+        watchProgress: this.watchProgress,
+        playbackRate: this.defaultPlayback,
+        videoId: this.id,
+        playlistId: this.playlistId,
+        playlistIndex: this.playlistIndex,
+        playlistReverse: this.playlistReverse,
+        playlistShuffle: this.playlistShuffle,
+        playlistLoop: this.playlistLoop
+      })
+
+      if (this.saveWatchedProgress && !this.watched) {
+        this.markAsWatched()
+      }
+    },
+
     toggleSave: function () {
       if (this.inFavoritesPlaylist) {
         this.removeFromPlaylist()
@@ -365,7 +413,7 @@ export default Vue.extend({
         title: this.title,
         author: this.channelName,
         authorId: this.channelId,
-        published: this.publishedText.split(',')[0],
+        published: this.publishedText ? this.publishedText.split(',')[0] : this.publishedText,
         description: this.description,
         viewCount: this.viewCount,
         lengthSeconds: this.data.lengthSeconds,
@@ -437,6 +485,7 @@ export default Vue.extend({
     ...mapActions([
       'showToast',
       'toLocalePublicationString',
+      'openInExternalPlayer',
       'updateHistory',
       'removeFromHistory',
       'addVideo',
diff --git a/src/renderer/components/ft-list-video/ft-list-video.vue b/src/renderer/components/ft-list-video/ft-list-video.vue
index 6ffb4c63..625ef3b8 100644
--- a/src/renderer/components/ft-list-video/ft-list-video.vue
+++ b/src/renderer/components/ft-list-video/ft-list-video.vue
@@ -31,6 +31,16 @@
       >
         {{ isLive ? $t("Video.Live") : duration }}
       </div>
+      <ft-icon-button
+        v-if="externalPlayer !== ''"
+        :title="$t('Video.External Player.OpenInTemplate').replace('$', externalPlayer)"
+        icon="external-link-alt"
+        class="externalPlayerIcon"
+        theme="base"
+        :padding="appearance === `watchPlaylistItem` ? 6 : 7"
+        :size="appearance === `watchPlaylistItem` ? 12 : 16"
+        @click="handleExternalPlayer"
+      />
       <ft-icon-button
         v-if="!isLive"
         :title="$t('Video.Save Video')"
diff --git a/src/renderer/components/watch-video-info/watch-video-info.js b/src/renderer/components/watch-video-info/watch-video-info.js
index b5756a29..ef307690 100644
--- a/src/renderer/components/watch-video-info/watch-video-info.js
+++ b/src/renderer/components/watch-video-info/watch-video-info.js
@@ -84,7 +84,23 @@ export default Vue.extend({
     },
     playlistId: {
       type: String,
-      default: ''
+      default: null
+    },
+    getPlaylistIndex: {
+      type: Function,
+      required: true
+    },
+    getPlaylistReverse: {
+      type: Function,
+      required: true
+    },
+    getPlaylistShuffle: {
+      type: Function,
+      required: true
+    },
+    getPlaylistLoop: {
+      type: Function,
+      required: true
     },
     theatrePossible: {
       type: Boolean,
@@ -224,6 +240,14 @@ export default Vue.extend({
       } else {
         return this.$t('Video.Published on')
       }
+    },
+
+    externalPlayer: function () {
+      return this.$store.getters.getExternalPlayer
+    },
+
+    defaultPlayback: function () {
+      return this.$store.getters.getDefaultPlayback
     }
   },
   mounted: function () {
@@ -243,6 +267,22 @@ export default Vue.extend({
     }
   },
   methods: {
+    handleExternalPlayer: function () {
+      this.$emit('pause-player')
+
+      this.openInExternalPlayer({
+        strings: this.$t('Video.External Player'),
+        watchProgress: this.getTimestamp(),
+        playbackRate: this.defaultPlayback,
+        videoId: this.id,
+        playlistId: this.playlistId,
+        playlistIndex: this.getPlaylistIndex(),
+        playlistReverse: this.getPlaylistReverse(),
+        playlistShuffle: this.getPlaylistShuffle(),
+        playlistLoop: this.getPlaylistLoop()
+      })
+    },
+
     goToChannel: function () {
       this.$router.push({ path: `/channel/${this.channelId}` })
     },
@@ -388,6 +428,7 @@ export default Vue.extend({
 
     ...mapActions([
       'showToast',
+      'openInExternalPlayer',
       'updateProfile',
       'addVideo',
       'removeVideo',
diff --git a/src/renderer/components/watch-video-info/watch-video-info.vue b/src/renderer/components/watch-video-info/watch-video-info.vue
index 303f17ac..0d7b0bc3 100644
--- a/src/renderer/components/watch-video-info/watch-video-info.vue
+++ b/src/renderer/components/watch-video-info/watch-video-info.vue
@@ -70,6 +70,14 @@
           :theme="favoriteIconTheme"
           @click="toggleSave"
         />
+        <ft-icon-button
+          v-if="externalPlayer !== ''"
+          :title="$t('Video.External Player.OpenInTemplate').replace('$', externalPlayer)"
+          icon="external-link-alt"
+          class="option"
+          theme="secondary"
+          @click="handleExternalPlayer"
+        />
         <ft-icon-button
           v-if="theatrePossible"
           :title="$t('Toggle Theatre Mode')"
diff --git a/src/renderer/components/watch-video-playlist/watch-video-playlist.vue b/src/renderer/components/watch-video-playlist/watch-video-playlist.vue
index 1981f4e3..bbae3729 100644
--- a/src/renderer/components/watch-video-playlist/watch-video-playlist.vue
+++ b/src/renderer/components/watch-video-playlist/watch-video-playlist.vue
@@ -83,8 +83,13 @@
           <ft-list-video
             :data="item"
             :playlist-id="playlistId"
+            :playlist-index="reversePlaylist ? playlistItems.length - index - 1 : index"
+            :playlist-reverse="reversePlaylist"
+            :playlist-shuffle="shuffleEnabled"
+            :playlist-loop="loopEnabled"
             appearance="watchPlaylistItem"
             force-list-type="list"
+            @pause-player="$emit('pause-player')"
           />
         </div>
       </div>
diff --git a/src/renderer/sass-partials/_ft-list-item.sass b/src/renderer/sass-partials/_ft-list-item.sass
index 5a2ce614..d8682bb1 100644
--- a/src/renderer/sass-partials/_ft-list-item.sass
+++ b/src/renderer/sass-partials/_ft-list-item.sass
@@ -89,6 +89,13 @@ $thumbnail-overlay-opacity: 0.85
       @include is-watch-playlist-item
         font-size: 12px
 
+    .externalPlayerIcon
+      position: absolute
+      bottom: 4px
+      left: 4px
+      font-size: 17px
+      opacity: $thumbnail-overlay-opacity
+
     .favoritesIcon
       position: absolute
       top: 3px
@@ -144,6 +151,9 @@ $thumbnail-overlay-opacity: 0.85
     .optionsButton
       float: right // ohhhh man, float was finally the right choice for something
 
+    .externalPlayerButton
+      float: right
+
     .title
       font-size: 20px
       @include low-contrast-when-watched(var(--primary-text-color))
diff --git a/src/renderer/sass-partials/_settings.sass b/src/renderer/sass-partials/_settings.sass
index 2eb4af2a..b9c52397 100644
--- a/src/renderer/sass-partials/_settings.sass
+++ b/src/renderer/sass-partials/_settings.sass
@@ -25,5 +25,5 @@
     width: 90%
 
 @media only screen and (max-width: 460px)
-  .generalSettingsFlexBox, .playerSettingsFlexBox
+  .generalSettingsFlexBox, .playerSettingsFlexBox, .externalPlayerSettingsFlexBox
     justify-content: flex-start
diff --git a/src/renderer/store/modules/settings.js b/src/renderer/store/modules/settings.js
index b81f5c69..c12356b3 100644
--- a/src/renderer/store/modules/settings.js
+++ b/src/renderer/store/modules/settings.js
@@ -177,6 +177,10 @@ const state = {
   displayVideoPlayButton: true,
   enableSearchSuggestions: true,
   enableSubtitles: true,
+  externalPlayer: '',
+  externalPlayerExecutable: '',
+  externalPlayerIgnoreWarnings: false,
+  externalPlayerCustomArgs: '',
   forceLocalBackendForLegacy: false,
   hideActiveSubscriptions: false,
   hideChannelSubscriptions: false,
diff --git a/src/renderer/store/modules/utils.js b/src/renderer/store/modules/utils.js
index c6ebc962..06cec337 100644
--- a/src/renderer/store/modules/utils.js
+++ b/src/renderer/store/modules/utils.js
@@ -52,7 +52,10 @@ const state = {
     '#FFAB00',
     '#FF6D00',
     '#DD2C00'
-  ]
+  ],
+  externalPlayerNames: [],
+  externalPlayerValues: [],
+  externalPlayerCmdArguments: {}
 }
 
 const getters = {
@@ -102,6 +105,18 @@ const getters = {
 
   getRecentBlogPosts () {
     return state.recentBlogPosts
+  },
+
+  getExternalPlayerNames () {
+    return state.externalPlayerNames
+  },
+
+  getExternalPlayerValues () {
+    return state.externalPlayerValues
+  },
+
+  getExternalPlayerCmdArguments () {
+    return state.externalPlayerCmdArguments
   }
 }
 
@@ -596,6 +611,181 @@ const actions = {
 
   showToast (_, payload) {
     FtToastEvents.$emit('toast-open', payload.message, payload.action, payload.time)
+  },
+
+  showExternalPlayerUnsupportedActionToast: function ({ dispatch }, payload) {
+    if (!payload.ignoreWarnings) {
+      const toastMessage = payload.template
+        .replace('$', payload.externalPlayer)
+        .replace('%', payload.action)
+      dispatch('showToast', {
+        message: toastMessage
+      })
+    }
+  },
+
+  getExternalPlayerCmdArgumentsData ({ commit }, payload) {
+    const fileName = 'external-player-map.json'
+    let fileData
+    /* eslint-disable-next-line */
+    const fileLocation = payload.isDev ? './static/' : `${__dirname}/static/`
+
+    if (fs.existsSync(`${fileLocation}${fileName}`)) {
+      fileData = fs.readFileSync(`${fileLocation}${fileName}`)
+    } else {
+      fileData = '[{"name":"None","value":"","cmdArguments":null}]'
+    }
+
+    const externalPlayerMap = JSON.parse(fileData).map((entry) => {
+      return { name: entry.name, value: entry.value, cmdArguments: entry.cmdArguments }
+    })
+
+    const externalPlayerNames = externalPlayerMap.map((entry) => { return entry.name })
+    const externalPlayerValues = externalPlayerMap.map((entry) => { return entry.value })
+    const externalPlayerCmdArguments = externalPlayerMap.reduce((result, item) => {
+      result[item.value] = item.cmdArguments
+      return result
+    }, {})
+
+    commit('setExternalPlayerNames', externalPlayerNames)
+    commit('setExternalPlayerValues', externalPlayerValues)
+    commit('setExternalPlayerCmdArguments', externalPlayerCmdArguments)
+  },
+
+  openInExternalPlayer ({ dispatch, state, rootState }, payload) {
+    const args = []
+    const externalPlayer = rootState.settings.externalPlayer
+    const cmdArgs = state.externalPlayerCmdArguments[externalPlayer]
+    const executable = rootState.settings.externalPlayerExecutable !== ''
+      ? rootState.settings.externalPlayerExecutable
+      : cmdArgs.defaultExecutable
+    const ignoreWarnings = rootState.settings.externalPlayerIgnoreWarnings
+    const customArgs = rootState.settings.externalPlayerCustomArgs
+
+    if (payload.watchProgress > 0) {
+      if (typeof cmdArgs.startOffset === 'string') {
+        args.push(`${cmdArgs.startOffset}${payload.watchProgress}`)
+      } else {
+        dispatch('showExternalPlayerUnsupportedActionToast', {
+          ignoreWarnings,
+          externalPlayer,
+          template: payload.strings.UnsupportedActionTemplate,
+          action: payload.strings['Unsupported Actions']['starting video at offset']
+        })
+      }
+    }
+
+    if (payload.playbackRate !== null) {
+      if (typeof cmdArgs.playbackRate === 'string') {
+        args.push(`${cmdArgs.playbackRate}${payload.playbackRate}`)
+      } else {
+        dispatch('showExternalPlayerUnsupportedActionToast', {
+          ignoreWarnings,
+          externalPlayer,
+          template: payload.strings.UnsupportedActionTemplate,
+          action: payload.strings['Unsupported Actions']['setting a playback rate']
+        })
+      }
+    }
+
+    // Check whether the video is in a playlist
+    if (typeof cmdArgs.playlistUrl === 'string' && payload.playlistId !== null && payload.playlistId !== '') {
+      if (payload.playlistIndex !== null) {
+        if (typeof cmdArgs.playlistIndex === 'string') {
+          args.push(`${cmdArgs.playlistIndex}${payload.playlistIndex}`)
+        } else {
+          dispatch('showExternalPlayerUnsupportedActionToast', {
+            ignoreWarnings,
+            externalPlayer,
+            template: payload.strings.UnsupportedActionTemplate,
+            action: payload.strings['Unsupported Actions']['opening specific video in a playlist (falling back to opening the video)']
+          })
+        }
+      }
+
+      if (payload.playlistReverse) {
+        if (typeof cmdArgs.playlistReverse === 'string') {
+          args.push(cmdArgs.playlistReverse)
+        } else {
+          dispatch('showExternalPlayerUnsupportedActionToast', {
+            ignoreWarnings,
+            externalPlayer,
+            template: payload.strings.UnsupportedActionTemplate,
+            action: payload.strings['Unsupported Actions']['reversing playlists']
+          })
+        }
+      }
+
+      if (payload.playlistShuffle) {
+        if (typeof cmdArgs.playlistShuffle === 'string') {
+          args.push(cmdArgs.playlistShuffle)
+        } else {
+          dispatch('showExternalPlayerUnsupportedActionToast', {
+            ignoreWarnings,
+            externalPlayer,
+            template: payload.strings.UnsupportedActionTemplate,
+            action: payload.strings['Unsupported Actions']['shuffling playlists']
+          })
+        }
+      }
+
+      if (payload.playlistLoop) {
+        if (typeof cmdArgs.playlistLoop === 'string') {
+          args.push(cmdArgs.playlistLoop)
+        } else {
+          dispatch('showExternalPlayerUnsupportedActionToast', {
+            ignoreWarnings,
+            externalPlayer,
+            template: payload.strings.UnsupportedActionTemplate,
+            action: payload.strings['Unsupported Actions']['looping playlists']
+          })
+        }
+      }
+      if (cmdArgs.supportsYtdlProtocol) {
+        args.push(`${cmdArgs.playlistUrl}ytdl://${payload.playlistId}`)
+      } else {
+        args.push(`${cmdArgs.playlistUrl}https://youtube.com/playlist?list=${payload.playlistId}`)
+      }
+    } else {
+      if (payload.playlistId !== null && payload.playlistId !== '') {
+        dispatch('showExternalPlayerUnsupportedActionToast', {
+          ignoreWarnings,
+          externalPlayer,
+          template: payload.strings.UnsupportedActionTemplate,
+          action: payload.strings['Unsupported Actions']['opening playlists']
+        })
+      }
+      if (payload.videoId !== null) {
+        if (cmdArgs.supportsYtdlProtocol) {
+          args.push(`${cmdArgs.videoUrl}ytdl://${payload.videoId}`)
+        } else {
+          args.push(`${cmdArgs.videoUrl}https://www.youtube.com/watch?v=${payload.videoId}`)
+        }
+      }
+    }
+
+    // Append custom user-defined arguments
+    if (customArgs !== null) {
+      const custom = customArgs.split(';')
+      args.push(...custom)
+    }
+
+    const openingToast = payload.strings.OpeningTemplate
+      .replace('$', payload.playlistId === null || payload.playlistId === ''
+        ? payload.strings.video
+        : payload.strings.playlist)
+      .replace('%', externalPlayer)
+    dispatch('showToast', {
+      message: openingToast
+    })
+
+    console.log(executable, args)
+
+    const { ipcRenderer } = require('electron')
+    ipcRenderer.send('openInExternalPlayer', {
+      executable,
+      args
+    })
   }
 }
 
@@ -663,6 +853,18 @@ const mutations = {
 
   setRecentBlogPosts (state, value) {
     state.recentBlogPosts = value
+  },
+
+  setExternalPlayerNames (state, value) {
+    state.externalPlayerNames = value
+  },
+
+  setExternalPlayerValues (state, value) {
+    state.externalPlayerValues = value
+  },
+
+  setExternalPlayerCmdArguments (state, value) {
+    state.externalPlayerCmdArguments = value
   }
 }
 
diff --git a/src/renderer/views/Playlist/Playlist.vue b/src/renderer/views/Playlist/Playlist.vue
index b4c12fa1..22a04704 100644
--- a/src/renderer/views/Playlist/Playlist.vue
+++ b/src/renderer/views/Playlist/Playlist.vue
@@ -18,6 +18,7 @@
         :key="index"
         :data="item"
         :playlist-id="playlistId"
+        :playlist-index="index"
         appearance="result"
         force-list-type="list"
       />
diff --git a/src/renderer/views/Settings/Settings.js b/src/renderer/views/Settings/Settings.js
index d0c78bf2..4cfacc1e 100644
--- a/src/renderer/views/Settings/Settings.js
+++ b/src/renderer/views/Settings/Settings.js
@@ -4,6 +4,7 @@ import FtElementList from '../../components/ft-element-list/ft-element-list.vue'
 import GeneralSettings from '../../components/general-settings/general-settings.vue'
 import ThemeSettings from '../../components/theme-settings/theme-settings.vue'
 import PlayerSettings from '../../components/player-settings/player-settings.vue'
+import ExternalPlayerSettings from '../../components/external-player-settings/external-player-settings.vue'
 import SubscriptionSettings from '../../components/subscription-settings/subscription-settings.vue'
 import PrivacySettings from '../../components/privacy-settings/privacy-settings.vue'
 import DataSettings from '../../components/data-settings/data-settings.vue'
@@ -19,11 +20,17 @@ export default Vue.extend({
     'general-settings': GeneralSettings,
     'theme-settings': ThemeSettings,
     'player-settings': PlayerSettings,
+    'external-player-settings': ExternalPlayerSettings,
     'subscription-settings': SubscriptionSettings,
     'privacy-settings': PrivacySettings,
     'data-settings': DataSettings,
     'distraction-settings': DistractionSettings,
     'proxy-settings': ProxySettings,
     'sponsor-block-settings': SponsorBlockSettings
+  },
+  computed: {
+    usingElectron: function () {
+      return this.$store.getters.getUsingElectron
+    }
   }
 })
diff --git a/src/renderer/views/Settings/Settings.vue b/src/renderer/views/Settings/Settings.vue
index 9fbf0585..f801e6da 100644
--- a/src/renderer/views/Settings/Settings.vue
+++ b/src/renderer/views/Settings/Settings.vue
@@ -3,6 +3,7 @@
     <general-settings />
     <theme-settings />
     <player-settings />
+    <external-player-settings v-if="usingElectron" />
     <subscription-settings />
     <distraction-settings />
     <privacy-settings />
diff --git a/src/renderer/views/Watch/Watch.js b/src/renderer/views/Watch/Watch.js
index 103c06bf..b3a02723 100644
--- a/src/renderer/views/Watch/Watch.js
+++ b/src/renderer/views/Watch/Watch.js
@@ -1174,6 +1174,13 @@ export default Vue.extend({
       }))
     },
 
+    pausePlayer: function () {
+      const player = this.$refs.videoPlayer.player
+      if (player && !player.paused()) {
+        player.pause()
+      }
+    },
+
     getWatchedProgress: function () {
       return this.$refs.videoPlayer && this.$refs.videoPlayer.player ? this.$refs.videoPlayer.player.currentTime() : 0
     },
@@ -1182,6 +1189,26 @@ export default Vue.extend({
       return Math.floor(this.getWatchedProgress())
     },
 
+    getPlaylistIndex: function () {
+      return this.$refs.watchVideoPlaylist
+        ? this.getPlaylistReverse()
+          ? this.$refs.watchVideoPlaylist.playlistItems.length - this.$refs.watchVideoPlaylist.currentVideoIndex
+          : this.$refs.watchVideoPlaylist.currentVideoIndex - 1
+        : -1
+    },
+
+    getPlaylistReverse: function () {
+      return this.$refs.watchVideoPlaylist ? this.$refs.watchVideoPlaylist.reversePlaylist : false
+    },
+
+    getPlaylistShuffle: function () {
+      return this.$refs.watchVideoPlaylist ? this.$refs.watchVideoPlaylist.shuffleEnabled : false
+    },
+
+    getPlaylistLoop: function () {
+      return this.$refs.watchVideoPlaylist ? this.$refs.watchVideoPlaylist.loopEnabled : false
+    },
+
     updateTitle: function () {
       document.title = `${this.videoTitle} - FreeTube`
     },
diff --git a/src/renderer/views/Watch/Watch.vue b/src/renderer/views/Watch/Watch.vue
index 8424841e..29e4a5d1 100644
--- a/src/renderer/views/Watch/Watch.vue
+++ b/src/renderer/views/Watch/Watch.vue
@@ -82,14 +82,19 @@
         :is-live="isLive"
         :is-upcoming="isUpcoming"
         :download-links="downloadLinks"
-        :watching-playlist="watchingPlaylist"
         :playlist-id="playlistId"
+        :watching-playlist="watchingPlaylist"
+        :get-playlist-index="getPlaylistIndex"
+        :get-playlist-reverse="getPlaylistReverse"
+        :get-playlist-shuffle="getPlaylistShuffle"
+        :get-playlist-loop="getPlaylistLoop"
         :theatre-possible="theatrePossible"
         :length-seconds="videoLengthSeconds"
         :video-thumbnail="thumbnail"
         class="watchVideo"
         :class="{ theatreWatchVideo: useTheatreMode }"
         @theatre-mode="toggleTheatreMode"
+        @pause-player="pausePlayer"
       />
       <watch-video-description
         v-if="!isLoading"
@@ -125,6 +130,7 @@
         :video-id="videoId"
         class="watchVideoSideBar watchVideoPlaylist"
         :class="{ theatrePlaylist: useTheatreMode }"
+        @pause-player="pausePlayer"
       />
       <watch-video-recommendations
         v-if="!isLoading"
diff --git a/static/external-player-map.json b/static/external-player-map.json
new file mode 100644
index 00000000..fe40a643
--- /dev/null
+++ b/static/external-player-map.json
@@ -0,0 +1,23 @@
+[
+    {
+        "name": "None",
+        "value": "",
+        "cmdArguments": null
+    },
+    {
+        "name": "mpv",
+        "value": "mpv",
+        "cmdArguments": {
+            "defaultExecutable": "mpv",
+            "supportsYtdlProtocol": true,
+            "videoUrl": "",
+            "playlistUrl": "",
+            "startOffset": "--start=",
+            "playbackRate": "--speed=",
+            "playlistIndex": "--playlist-start=",
+            "playlistReverse": null,
+            "playlistShuffle": "--shuffle",
+            "playlistLoop": "--loop-playlist"
+        }
+    }
+]
diff --git a/static/locales/en-US.yaml b/static/locales/en-US.yaml
index d86bd671..e543dde0 100644
--- a/static/locales/en-US.yaml
+++ b/static/locales/en-US.yaml
@@ -195,6 +195,12 @@ Settings:
       1440p: 1440p
       4k: 4k
       8k: 8k
+  External Player Settings:
+    External Player Settings: External Player Settings
+    External Player: External Player
+    Ignore Unsupported Action Warnings: Ignore Unsupported Action Warnings
+    Custom External Player Executable: Custom External Player Executable
+    Custom External Player Arguments: Custom External Player Arguments
   Privacy Settings:
     Privacy Settings: Privacy Settings
     Remember History: Remember History
@@ -487,6 +493,23 @@ Video:
     self-promotion: self-promotion
     interaction: interaction
     music offtopic: music offtopic
+  External Player:
+    # $ is replaced with the external player
+    OpenInTemplate: Open in $
+    video: video
+    playlist: playlist
+    # $ is replaced with the current context (see video/playlist above) and % the external player setting
+    OpeningTemplate: Opening $ in %...
+    # $ is replaced with the external player and % with the unsupported action
+    UnsupportedActionTemplate: '$ does not support: %'
+    Unsupported Actions:
+      starting video at offset: starting video at offset
+      setting a playback rate: setting a playback rate
+      opening playlists: opening playlists
+      opening specific video in a playlist (falling back to opening the video): opening specific video in a playlist (falling back to opening the video)
+      reversing playlists: reversing playlists
+      shuffling playlists: shuffling playlists
+      looping playlists: looping playlists
 #& Videos
 Videos:
   #& Sort By
@@ -586,6 +609,16 @@ Tooltips:
     Default Video Format: Set the formats used when a video plays. DASH formats can
       play higher qualities. Legacy formats are limited to a max of 720p but use less
       bandwidth. Audio formats are audio only streams.
+  External Player Settings:
+    External Player: Choosing an external player will display an icon, for opening the
+      video (playlist if supported) in the external player, on the thumbnail.
+    Custom External Player Executable: By default, FreeTube will assume that the chosen external
+      player can be found via the PATH environment variable. If needed, a custom path can
+      be set here.
+    Ignore Warnings: Suppress warnings for when the current external player does not support
+      the current action (e.g. reversing playlists, etc.).
+    Custom External Player Arguments: Any custom command line arguments, separated by semicolons (';'),
+      you want to be passed to the external player.
   Subscription Settings:
     Fetch Feeds from RSS: When enabled, FreeTube will use RSS instead of its default
       method for grabbing your subscription feed. RSS is faster and prevents IP blocking,
diff --git a/static/locales/en_GB.yaml b/static/locales/en_GB.yaml
index 0ce4215b..263a78fa 100644
--- a/static/locales/en_GB.yaml
+++ b/static/locales/en_GB.yaml
@@ -130,6 +130,8 @@ Settings:
         #! List countries
     View all Invidious instance information: View all Invidious instance information
     System Default: System Default
+    External Player: External Player
+    External Player Executable: Custom External Player Executable
   Theme Settings:
     Theme Settings: 'Theme Settings'
     Match Top Bar with Main Color: 'Match top bar with main colour'
@@ -193,6 +195,12 @@ Settings:
     Playlist Next Video Interval: Playlist Next Video Interval
     Next Video Interval: Next Video Interval
     Display Play Button In Video Player: Display Play Button In Video Player
+  External Player Settings:
+    External Player Settings: External Player Settings
+    External Player: External Player
+    Ignore Unsupported Action Warnings: Ignore Unsupported Action Warnings
+    Custom External Player Executable: Custom External Player Executable
+    Custom External Player Arguments: Custom External Player Arguments
   Privacy Settings:
     Privacy Settings: 'Privacy Settings'
     Remember History: 'Remember History'
@@ -529,6 +537,23 @@ Video:
     intro: intro
     sponsor: sponsor
   Skipped segment: Skipped segment
+  External Player:
+    # $ is replaced with the external player
+    OpenInTemplate: Open in $
+    video: video
+    playlist: playlist
+    # $ is replaced with the current context (see video/playlist above) and % the external player setting
+    OpeningTemplate: Opening $ in %...
+    # $ is replaced with the external player and % with the unsupported action
+    UnsupportedActionTemplate: '$ does not support: %'
+    Unsupported Actions:
+      starting video at offset: starting video at offset
+      setting a playback rate: setting a playback rate
+      opening playlists: opening playlists
+      opening specific video in a playlist (falling back to opening the video): opening specific video in a playlist (falling back to opening the video)
+      reversing playlists: reversing playlists
+      shuffling playlists: shuffling playlists
+      looping playlists: looping playlists
 Videos:
   #& Sort By
   Sort By:
@@ -654,6 +679,16 @@ Tooltips:
     Preferred API Backend: Choose the back-end that FreeTube uses to obtain data.
       The local API is a built-in extractor. The Invidious API requires an Invidious
       server to connect to.
+  External Player Settings:
+    External Player: Choosing an external player will display an icon, for opening the
+      video (playlist if supported) in the external player, on the thumbnail.
+    Custom External Player Executable: By default, FreeTube will assume that the chosen external
+      player can be found via the PATH environment variable. If needed, a custom path can
+      be set here.
+    Ignore Warnings: Suppress warnings for when the current external player does not support
+      the current action (e.g. reversing playlists, etc.).
+    Custom External Player Arguments: Any custom command line arguments, separated by semicolons (';'),
+      you want to be passed to the external player.
   Privacy Settings:
     Remove Video Meta Files: When enabled, FreeTube automatically deletes meta files
       created during video playback, when the watch page is closed.