WIP

This PR adds support for parsing the newer channel header format
(banner + subscription parsing)

Before this change:
* 0 subscribers
* No banner image

After this change:
* Example with Mr Breast channel: 299M
* Image banner is visible

Closes issue 4783

.ameba.yml

@@ -20,6 +20,9 @@ Lint/ShadowingOuterLocalVar:
   Excluded:
   - src/invidious/helpers/tokens.cr
 
+Lint/NotNil:
+  Enabled: false
+
 
 #
 # Style
@@ -31,6 +34,13 @@ Style/RedundantBegin:
 Style/RedundantReturn:
   Enabled: false
 
+Style/ParenthesesAroundCondition:
+  Enabled: false
+
+# This requires a rewrite of most data structs (and their usage) in Invidious.
+Style/QueryBoolMethods:
+  Enabled: false
+
 
 #
 # Metrics
@@ -39,50 +49,4 @@ Style/RedundantReturn:
 # Ignore function complexity (number of if/else & case/when branches)
 # For some functions that can hardly be simplified for now
 Metrics/CyclomaticComplexity:
-  Excluded:
+  Enabled: false
-  # get_about_info(ucid, locale) => [17/10]
-  - src/invidious/channels/about.cr
-
-  # fetch_channel_community(ucid, continuation, ...) => [34/10]
-  - src/invidious/channels/community.cr
-
-  # create_notification_stream(env, topics, connection_channel) => [14/10]
-  - src/invidious/helpers/helpers.cr:84:5
-
-  # get_index(plural_form, count) => [25/10]
-  - src/invidious/helpers/i18next.cr
-
-  # call(context) => [18/10]
-  - src/invidious/helpers/static_file_handler.cr
-
-  # show(env) => [38/10]
-  - src/invidious/routes/embed.cr
-
-  # get_video_playback(env) => [45/10]
-  - src/invidious/routes/video_playback.cr
-
-  # handle(env) => [40/10]
-  - src/invidious/routes/watch.cr
-
-  # playlist_ajax(env) => [24/10]
-  - src/invidious/routes/playlists.cr
-
-  # fetch_youtube_comments(id, cursor, ....) => [40/10]
-  # template_youtube_comments(comments, locale, ...) => [16/10]
-  # content_to_comment_html(content) => [14/10]
-  - src/invidious/comments.cr
-
-  # to_json(locale, json) => [21/10]
-  # extract_video_info(video_id, ...) => [44/10]
-  # process_video_params(query, preferences) => [20/10]
-  - src/invidious/videos.cr
-
-
-
-#src/invidious/playlists.cr:327:5
-#[C] Metrics/CyclomaticComplexity: Cyclomatic complexity too high [19/10]
-# fetch_playlist(plid : String)
-
-#src/invidious/playlists.cr:436:5
-#[C] Metrics/CyclomaticComplexity: Cyclomatic complexity too high [11/10]
-# extract_playlist_videos(initial_data : Hash(String, JSON::Any))

.github/workflows/build-nightly-container.yml

@@ -1,4 +1,4 @@
-name: Build and release container
+name: Build and release container directly from master
 
 on:
   push:
@@ -24,9 +24,9 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Crystal
-        uses: crystal-lang/install-crystal@v1.8.0
+        uses: crystal-lang/install-crystal@v1.8.2
         with:
-          crystal: 1.9.2
+          crystal: 1.12.2
 
       - name: Run lint
         run: |
@@ -58,7 +58,7 @@ jobs:
           images: quay.io/invidious/invidious
           tags: |
             type=sha,format=short,prefix={{date 'YYYY.MM.DD'}}-,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
-            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
+            type=raw,value=master,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
           labels: |
             quay.expires-after=12w
 
@@ -83,7 +83,7 @@ jobs:
             suffix=-arm64
           tags: |
             type=sha,format=short,prefix={{date 'YYYY.MM.DD'}}-,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
-            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
+            type=raw,value=master,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
           labels: |
             quay.expires-after=12w
 

.github/workflows/build-stable-container.yml

@@ -0,0 +1,90 @@
+name: Build and release container
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Crystal
+        uses: crystal-lang/install-crystal@v1.8.2
+        with:
+          crystal: 1.12.2
+
+      - name: Run lint
+        run: |
+          if ! crystal tool format --check; then
+            crystal tool format
+            git diff
+            exit 1
+          fi
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: arm64
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to registry
+        uses: docker/login-action@v3
+        with:
+          registry: quay.io
+          username: ${{ secrets.QUAY_USERNAME }}
+          password: ${{ secrets.QUAY_PASSWORD }}
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: quay.io/invidious/invidious
+          tags: |
+            type=semver,pattern={{version}}
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
+          labels: |
+            quay.expires-after=12w
+
+      - name: Build and push Docker AMD64 image for Push Event
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: docker/Dockerfile
+          platforms: linux/amd64
+          labels: ${{ steps.meta.outputs.labels }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          build-args: |
+            "release=1"
+
+      - name: Docker meta
+        id: meta-arm64
+        uses: docker/metadata-action@v5
+        with:
+          images: quay.io/invidious/invidious
+          flavor: |
+            suffix=-arm64
+          tags: |
+            type=semver,pattern={{version}}
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
+          labels: |
+            quay.expires-after=12w
+
+      - name: Build and push Docker ARM64 image for Push Event
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: docker/Dockerfile.arm64
+          platforms: linux/arm64/v8
+          labels: ${{ steps.meta-arm64.outputs.labels }}
+          push: true
+          tags: ${{ steps.meta-arm64.outputs.tags }}
+          build-args: |
+            "release=1"

.github/workflows/ci.yml

@@ -38,10 +38,10 @@ jobs:
       matrix:
         stable: [true]
         crystal:
-          - 1.7.3
-          - 1.8.2
           - 1.9.2
           - 1.10.1
+          - 1.11.2
+          - 1.12.1
         include:
           - crystal: nightly
             stable: false
@@ -124,4 +124,28 @@ jobs:
       - name: Test Docker
         run: while curl -Isf http://localhost:3000; do sleep 1; done
 
+  ameba_lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
 
+      - name: Install Crystal
+        uses: crystal-lang/install-crystal@v1.8.0
+        with:
+          crystal: latest
+
+      - name: Cache Shards
+        uses: actions/cache@v3
+        with:
+          path: |
+            ./lib
+            ./bin
+          key: shards-${{ hashFiles('shard.lock') }}
+
+      - name: Install Shards
+        run: shards install
+
+      - name: Run Ameba linter
+        run: bin/ameba

assets/js/player.js

@@ -351,7 +351,12 @@ if (video_data.params.save_player_pos) {
     const rememberedTime = get_video_time();
     let lastUpdated = 0;
 
-    if(!hasTimeParam) set_seconds_after_start(rememberedTime);
+    if(!hasTimeParam) {
+      if (rememberedTime >= video_data.length_seconds - 20)
+        set_seconds_after_start(0);
+      else
+        set_seconds_after_start(rememberedTime);
+    }
 
     player.on('timeupdate', function () {
         const raw = player.currentTime();

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM crystallang/crystal:1.8.2-alpine AS builder
+FROM crystallang/crystal:1.12.1-alpine AS builder
 
 RUN apk add --no-cache sqlite-static yaml-static
 

docker/Dockerfile.arm64

@@ -1,5 +1,5 @@
-FROM alpine:3.18 AS builder
+FROM alpine:3.19 AS builder
-RUN apk add --no-cache 'crystal=1.8.2-r0' shards sqlite-static yaml-static yaml-dev libxml2-static zlib-static openssl-libs-static openssl-dev musl-dev xz-static
+RUN apk add --no-cache 'crystal=1.10.1-r0' shards sqlite-static yaml-static yaml-dev libxml2-static zlib-static openssl-libs-static openssl-dev musl-dev xz-static
 
 ARG release
 

shard.lock

@@ -2,7 +2,7 @@ version: 2.0
 shards:
   ameba:
     git: https://github.com/crystal-ameba/ameba.git
-    version: 1.5.0
+    version: 1.6.1
 
   athena-negotiation:
     git: https://github.com/athena-framework/negotiation.git

shard.yml

@@ -45,7 +45,7 @@ development_dependencies:
     version: ~> 0.10.4
   ameba:
     github: crystal-ameba/ameba
-    version: ~> 1.5.0
+    version: ~> 1.6.1
 
 crystal: ">= 1.0.0, < 2.0.0"
 

spec/invidious/videos/regular_videos_extract_spec.cr

@@ -67,7 +67,7 @@ Spectator.describe "parse_video_info" do
     # Video metadata
 
     expect(info["genre"].as_s).to eq("Entertainment")
-    expect(info["genreUcid"].as_s).to be_empty
+    expect(info["genreUcid"].as_s?).to be_nil
     expect(info["license"].as_s).to be_empty
 
     # Author infos
@@ -151,7 +151,7 @@ Spectator.describe "parse_video_info" do
     # Video metadata
 
     expect(info["genre"].as_s).to eq("Music")
-    expect(info["genreUcid"].as_s).to be_empty
+    expect(info["genreUcid"].as_s?).to be_nil
     expect(info["license"].as_s).to be_empty
 
     # Author infos

spec/invidious/videos/scheduled_live_extract_spec.cr

@@ -94,7 +94,7 @@ Spectator.describe "parse_video_info" do
     # Video metadata
 
     expect(info["genre"].as_s).to eq("Entertainment")
-    expect(info["genreUcid"].as_s).to be_empty
+    expect(info["genreUcid"].as_s?).to be_nil
     expect(info["license"].as_s).to be_empty
 
     # Author infos

src/invidious/channels/about.cr

@@ -72,6 +72,7 @@ def get_about_info(ucid, locale) : AboutChannel
 
     # Raises a KeyError on failure.
     banners = initdata["header"]["c4TabbedHeaderRenderer"]?.try &.["banner"]?.try &.["thumbnails"]?
+    banners ||= initdata.dig?("header", "pageHeaderRenderer", "content", "pageHeaderViewModel", "banner", "imageBannerViewModel", "image", "sources")
     banner = banners.try &.[-1]?.try &.["url"].as_s?
 
     # if banner.includes? "channels/c4/default_banner"
@@ -147,9 +148,17 @@ def get_about_info(ucid, locale) : AboutChannel
     end
   end
 
-  sub_count = initdata
+  sub_count = 0
-    .dig?("header", "c4TabbedHeaderRenderer", "subscriberCountText", "simpleText").try &.as_s?
+
-    .try { |text| short_text_to_number(text.split(" ")[0]).to_i32 } || 0
+  if (metadata_rows = initdata.dig?("header", "pageHeaderRenderer", "content", "pageHeaderViewModel", "metadata", "contentMetadataViewModel", "metadataRows").try &.as_a)
+    metadata_rows.each do |row|
+      metadata_part = row.dig?("metadataParts").try &.as_a.find { |i| i.dig?("text", "content").try &.as_s.includes?("subscribers") }
+      if !metadata_part.nil?
+        sub_count = short_text_to_number(metadata_part.dig("text", "content").as_s.split(" ")[0]).to_i32
+      end
+      break if sub_count != 0
+    end
+  end
 
   AboutChannel.new(
     ucid: ucid,

src/invidious/channels/videos.cr

@@ -1,4 +1,4 @@
-def produce_channel_videos_continuation(ucid, page = 1, auto_generated = nil, sort_by = "newest", v2 = false)
+def produce_channel_content_continuation(ucid, content_type, page = 1, auto_generated = nil, sort_by = "newest", v2 = false)
   object_inner_2 = {
     "2:0:embedded" => {
       "1:0:varint" => 0_i64,
@@ -16,6 +16,13 @@ def produce_channel_videos_continuation(ucid, page = 1, auto_generated = nil, so
     .try { |i| Base64.urlsafe_encode(i) }
     .try { |i| URI.encode_www_form(i) }
 
+  content_type_numerical =
+    case content_type
+    when "videos"      then 15
+    when "livestreams" then 14
+    else                    15 # Fallback to "videos"
+    end
+
   sort_by_numerical =
     case sort_by
     when "newest"  then 1_i64
@@ -27,7 +34,7 @@ def produce_channel_videos_continuation(ucid, page = 1, auto_generated = nil, so
   object_inner_1 = {
     "110:embedded" => {
       "3:embedded" => {
-        "15:embedded" => {
+        "#{content_type_numerical}:embedded" => {
           "1:embedded" => {
             "1:string" => object_inner_2_encoded,
           },
@@ -62,6 +69,10 @@ def produce_channel_videos_continuation(ucid, page = 1, auto_generated = nil, so
   return continuation
 end
 
+def make_initial_content_ctoken(ucid, content_type, sort_by) : String
+  return produce_channel_content_continuation(ucid, content_type, sort_by: sort_by)
+end
+
 module Invidious::Channel::Tabs
   extend self
 
@@ -69,10 +80,6 @@ module Invidious::Channel::Tabs
   #  Regular videos
   # -------------------
 
-  def make_initial_video_ctoken(ucid, sort_by) : String
-    return produce_channel_videos_continuation(ucid, sort_by: sort_by)
-  end
-
   # Wrapper for AboutChannel, as we still need to call get_videos with
   # an author name and ucid directly (e.g in RSS feeds).
   # TODO: figure out how to get rid of that
@@ -94,7 +101,7 @@ module Invidious::Channel::Tabs
   end
 
   def get_videos(author : String, ucid : String, *, continuation : String? = nil, sort_by = "newest")
-    continuation ||= make_initial_video_ctoken(ucid, sort_by)
+    continuation ||= make_initial_content_ctoken(ucid, "videos", sort_by)
     initial_data = YoutubeAPI.browse(continuation: continuation)
 
     return extract_items(initial_data, author, ucid)
@@ -138,21 +145,18 @@ module Invidious::Channel::Tabs
   #  Livestreams
   # -------------------
 
-  def get_livestreams(channel : AboutChannel, continuation : String? = nil)
+  def get_livestreams(channel : AboutChannel, continuation : String? = nil, sort_by = "newest")
-    if continuation.nil?
+    continuation ||= make_initial_content_ctoken(channel.ucid, "livestreams", sort_by)
-      # EgdzdHJlYW1z8gYECgJ6AA%3D%3D is the protobuf object to load "streams"
+
-      initial_data = YoutubeAPI.browse(channel.ucid, params: "EgdzdHJlYW1z8gYECgJ6AA%3D%3D")
-    else
     initial_data = YoutubeAPI.browse(continuation: continuation)
-    end
 
     return extract_items(initial_data, channel.author, channel.ucid)
   end
 
-  def get_60_livestreams(channel : AboutChannel, continuation : String? = nil)
+  def get_60_livestreams(channel : AboutChannel, *, continuation : String? = nil, sort_by = "newest")
     if continuation.nil?
-      # Fetch the first "page" of streams
+      # Fetch the first "page" of stream
-      items, next_continuation = get_livestreams(channel)
+      items, next_continuation = get_livestreams(channel, sort_by: sort_by)
     else
       # Fetch a "page" of streams using the given continuation token
       items, next_continuation = get_livestreams(channel, continuation: continuation)

src/invidious/http_server/utils.cr

@@ -11,11 +11,12 @@ module Invidious::HttpServer
       params = url.query_params
       params["host"] = url.host.not_nil! # Should never be nil, in theory
       params["region"] = region if !region.nil?
+      url.query_params = params
 
       if absolute
-        return "#{HOST_URL}#{url.request_target}?#{params}"
+        return "#{HOST_URL}#{url.request_target}"
       else
-        return "#{url.request_target}?#{params}"
+        return url.request_target
       end
     end
 

src/invidious/jsonify/api_v1/video_json.cr

@@ -114,25 +114,31 @@ module Invidious::JSONify::APIv1
 
               json.field "projectionType", fmt["projectionType"]
 
-              if fmt_info = Invidious::Videos::Formats.itag_to_metadata?(fmt["itag"])
+              height = fmt["height"]?.try &.as_i
-                fps = fmt_info["fps"]?.try &.to_i || fmt["fps"]?.try &.as_i || 30
+              width = fmt["width"]?.try &.as_i
+
+              fps = fmt["fps"]?.try &.as_i
+
+              if fps
                 json.field "fps", fps
+              end
+
+              if height && width
+                json.field "size", "#{width}x#{height}"
+                json.field "resolution", "#{height}p"
+
+                quality_label = "#{width > height ? height : width}p"
+
+                if fps && fps > 30
+                  quality_label += fps.to_s
+                end
+
+                json.field "qualityLabel", quality_label
+              end
+
+              if fmt_info = Invidious::Videos::Formats.itag_to_metadata?(fmt["itag"])
                 json.field "container", fmt_info["ext"]
                 json.field "encoding", fmt_info["vcodec"]? || fmt_info["acodec"]
-
-                if fmt_info["height"]?
-                  json.field "resolution", "#{fmt_info["height"]}p"
-
-                  quality_label = "#{fmt_info["height"]}p"
-                  if fps > 30
-                    quality_label += "60"
-                  end
-                  json.field "qualityLabel", quality_label
-
-                  if fmt_info["width"]?
-                    json.field "size", "#{fmt_info["width"]}x#{fmt_info["height"]}"
-                  end
-                end
               end
 
               # Livestream chunk infos
@@ -163,26 +169,31 @@ module Invidious::JSONify::APIv1
 
               json.field "bitrate", fmt["bitrate"].as_i.to_s if fmt["bitrate"]?
 
-              fmt_info = Invidious::Videos::Formats.itag_to_metadata?(fmt["itag"])
+              height = fmt["height"]?.try &.as_i
-              if fmt_info
+              width = fmt["width"]?.try &.as_i
-                fps = fmt_info["fps"]?.try &.to_i || fmt["fps"]?.try &.as_i || 30
+
+              fps = fmt["fps"]?.try &.as_i
+
+              if fps
                 json.field "fps", fps
+              end
+
+              if height && width
+                json.field "size", "#{width}x#{height}"
+                json.field "resolution", "#{height}p"
+
+                quality_label = "#{width > height ? height : width}p"
+
+                if fps && fps > 30
+                  quality_label += fps.to_s
+                end
+
+                json.field "qualityLabel", quality_label
+              end
+
+              if fmt_info = Invidious::Videos::Formats.itag_to_metadata?(fmt["itag"])
                 json.field "container", fmt_info["ext"]
                 json.field "encoding", fmt_info["vcodec"]? || fmt_info["acodec"]
-
-                if fmt_info["height"]?
-                  json.field "resolution", "#{fmt_info["height"]}p"
-
-                  quality_label = "#{fmt_info["height"]}p"
-                  if fps > 30
-                    quality_label += "60"
-                  end
-                  json.field "qualityLabel", quality_label
-
-                  if fmt_info["width"]?
-                    json.field "size", "#{fmt_info["width"]}x#{fmt_info["height"]}"
-                  end
-                end
               end
             end
           end

src/invidious/playlists.cr

@@ -366,6 +366,8 @@ def fetch_playlist(plid : String)
 
     if text.includes? "video"
       video_count = text.gsub(/\D/, "").to_i? || 0
+    elsif text.includes? "episode"
+      video_count = text.gsub(/\D/, "").to_i? || 0
     elsif text.includes? "view"
       views = text.gsub(/\D/, "").to_i64? || 0_i64
     else

src/invidious/routes/api/v1/channels.cr

@@ -208,11 +208,12 @@ module Invidious::Routes::API::V1::Channels
     get_channel()
 
     # Retrieve continuation from URL parameters
+    sort_by = env.params.query["sort_by"]?.try &.downcase || "newest"
     continuation = env.params.query["continuation"]?
 
     begin
       videos, next_continuation = Channel::Tabs.get_60_livestreams(
-        channel, continuation: continuation
+        channel, continuation: continuation, sort_by: sort_by
       )
     rescue ex
       return error_json(500, ex)

src/invidious/routes/api/v1/feeds.cr

@@ -31,7 +31,7 @@ module Invidious::Routes::API::V1::Feeds
 
     if !CONFIG.popular_enabled
       error_message = {"error" => "Administrator has disabled this endpoint."}.to_json
-      haltf env, 400, error_message
+      haltf env, 403, error_message
     end
 
     JSON.build do |json|

src/invidious/routes/api/v1/misc.cr

@@ -74,7 +74,9 @@ module Invidious::Routes::API::V1::Misc
       response = playlist.to_json(offset, video_id: video_id)
       json_response = JSON.parse(response)
 
-      if json_response["videos"].as_a[0]["index"] != offset
+      if json_response["videos"].as_a.empty?
+        json_response = JSON.parse(response)
+      elsif json_response["videos"].as_a[0]["index"] != offset
         offset = json_response["videos"].as_a[0]["index"].as_i
         lookback = offset < 50 ? offset : 50
         response = playlist.to_json(offset - lookback)

src/invidious/routes/api/v1/videos.cr

@@ -89,9 +89,14 @@ module Invidious::Routes::API::V1::Videos
 
     if CONFIG.use_innertube_for_captions
       params = Invidious::Videos::Transcript.generate_param(id, caption.language_code, caption.auto_generated)
-      initial_data = YoutubeAPI.get_transcript(params)
 
-      webvtt = Invidious::Videos::Transcript.convert_transcripts_to_vtt(initial_data, caption.language_code)
+      transcript = Invidious::Videos::Transcript.from_raw(
+        YoutubeAPI.get_transcript(params),
+        caption.language_code,
+        caption.auto_generated
+      )
+
+      webvtt = transcript.to_vtt
     else
       # Timedtext API handling
       url = URI.parse("#{caption.base_url}&tlang=#{tlang}").request_target
@@ -136,7 +141,11 @@ module Invidious::Routes::API::V1::Videos
           end
         end
       else
-        webvtt = YT_POOL.client &.get("#{url}&fmt=vtt").body
+        uri = URI.parse(url)
+        query_params = uri.query_params
+        query_params["fmt"] = "vtt"
+        uri.query_params = query_params
+        webvtt = YT_POOL.client &.get(uri.request_target).body
 
         if webvtt.starts_with?("<?xml")
           webvtt = caption.timedtext_to_vtt(webvtt)

src/invidious/routes/before_all.cr

@@ -30,7 +30,7 @@ module Invidious::Routes::BeforeAll
 
     # Only allow the pages at /embed/* to be embedded
     if env.request.resource.starts_with?("/embed")
-      frame_ancestors = "'self' http: https:"
+      frame_ancestors = "'self' file: http: https:"
     else
       frame_ancestors = "'none'"
     end

src/invidious/routes/channels.cr

@@ -81,13 +81,12 @@ module Invidious::Routes::Channels
       return env.redirect "/channel/#{channel.ucid}"
     end
 
-    # TODO: support sort option for livestreams
+    sort_by = env.params.query["sort_by"]?.try &.downcase || "newest"
-    sort_by = ""
+    sort_options = {"newest", "oldest", "popular"}
-    sort_options = [] of String
 
     # Fetch items and continuation token
     items, next_continuation = Channel::Tabs.get_60_livestreams(
-      channel, continuation: continuation
+      channel, continuation: continuation, sort_by: sort_by
     )
 
     selected_tab = Frontend::ChannelPage::TabsAvailable::Streams

src/invidious/routes/preferences.cr

@@ -214,7 +214,7 @@ module Invidious::Routes::PreferencesRoute
         statistics_enabled ||= "off"
         CONFIG.statistics_enabled = statistics_enabled == "on"
 
-        CONFIG.modified_source_code_url = env.params.body["modified_source_code_url"]?.try &.as(String)
+        CONFIG.modified_source_code_url = env.params.body["modified_source_code_url"]?.presence
 
         File.write("config/config.yml", CONFIG.to_yaml)
       end

src/invidious/videos.cr

@@ -280,7 +280,7 @@ struct Video
   end
 
   def genre_url : String?
-    info["genreUcid"]? ? "/channel/#{info["genreUcid"]}" : nil
+    info["genreUcid"].try &.as_s? ? "/channel/#{info["genreUcid"]}" : nil
   end
 
   def is_vr : Bool?

src/invidious/videos/parser.cr

@@ -424,7 +424,7 @@ def parse_video_info(video_id : String, player_response : Hash(String, JSON::Any
     "shortDescription" => JSON::Any.new(short_description.try &.as_s || nil),
     # Video metadata
     "genre"     => JSON::Any.new(genre.try &.as_s || ""),
-    "genreUcid" => JSON::Any.new(genre_ucid.try &.as_s || ""),
+    "genreUcid" => JSON::Any.new(genre_ucid.try &.as_s?),
     "license"   => JSON::Any.new(license.try &.as_s || ""),
     # Music section
     "music" => JSON.parse(music_list.to_json),

src/invidious/videos/transcript.cr

@@ -1,8 +1,26 @@
 module Invidious::Videos
-  # Namespace for methods primarily relating to Transcripts
+  # A `Transcripts` struct encapsulates a sequence of lines that together forms the whole transcript for a given YouTube video.
-  module Transcript
+  # These lines can be categorized into two types: section headings and regular lines representing content from the video.
-    record TranscriptLine, start_ms : Time::Span, end_ms : Time::Span, line : String
+  struct Transcript
+    # Types
+    record HeadingLine, start_ms : Time::Span, end_ms : Time::Span, line : String
+    record RegularLine, start_ms : Time::Span, end_ms : Time::Span, line : String
+    alias TranscriptLine = HeadingLine | RegularLine
 
+    property lines : Array(TranscriptLine)
+
+    property language_code : String
+    property auto_generated : Bool
+
+    # User friendly label for the current transcript.
+    # Example: "English (auto-generated)"
+    property label : String
+
+    # Initializes a new Transcript struct with the contents and associated metadata describing it
+    def initialize(@lines : Array(TranscriptLine), @language_code : String, @auto_generated : Bool, @label : String)
+    end
+
+    # Generates a protobuf string to fetch the requested transcript from YouTube
     def self.generate_param(video_id : String, language_code : String, auto_generated : Bool) : String
       kind = auto_generated ? "asr" : ""
 
@@ -30,48 +48,79 @@ module Invidious::Videos
       return params
     end
 
-    def self.convert_transcripts_to_vtt(initial_data : Hash(String, JSON::Any), target_language : String) : String
+    # Constructs a Transcripts struct from the initial YouTube response
-      # Convert into array of TranscriptLine
+    def self.from_raw(initial_data : Hash(String, JSON::Any), language_code : String, auto_generated : Bool)
-      lines = self.parse(initial_data)
+      transcript_panel = initial_data.dig("actions", 0, "updateEngagementPanelAction", "content", "transcriptRenderer",
+        "content", "transcriptSearchPanelRenderer")
 
+      segment_list = transcript_panel.dig("body", "transcriptSegmentListRenderer")
+
+      if !segment_list["initialSegments"]?
+        raise NotFoundException.new("Requested transcript does not exist")
+      end
+
+      # Extract user-friendly label for the current transcript
+
+      footer_language_menu = transcript_panel.dig?(
+        "footer", "transcriptFooterRenderer", "languageMenu", "sortFilterSubMenuRenderer", "subMenuItems"
+      )
+
+      if footer_language_menu
+        label = footer_language_menu.as_a.select(&.["selected"].as_bool)[0]["title"].as_s
+      else
+        label = language_code
+      end
+
+      # Extract transcript lines
+
+      initial_segments = segment_list["initialSegments"].as_a
+
+      lines = [] of TranscriptLine
+
+      initial_segments.each do |line|
+        if unpacked_line = line["transcriptSectionHeaderRenderer"]?
+          line_type = HeadingLine
+        else
+          unpacked_line = line["transcriptSegmentRenderer"]
+          line_type = RegularLine
+        end
+
+        start_ms = unpacked_line["startMs"].as_s.to_i.millisecond
+        end_ms = unpacked_line["endMs"].as_s.to_i.millisecond
+        text = extract_text(unpacked_line["snippet"]) || ""
+
+        lines << line_type.new(start_ms, end_ms, text)
+      end
+
+      return Transcript.new(
+        lines: lines,
+        language_code: language_code,
+        auto_generated: auto_generated,
+        label: label
+      )
+    end
+
+    # Converts transcript lines to a WebVTT file
+    #
+    # This is used within Invidious to replace subtitles
+    # as to workaround YouTube's rate-limited timedtext endpoint.
+    def to_vtt
       settings_field = {
         "Kind"     => "captions",
-        "Language" => target_language,
+        "Language" => @language_code,
       }
 
-      # Taken from Invidious::Videos::Captions::Metadata.timedtext_to_vtt()
       vtt = WebVTT.build(settings_field) do |vtt|
-        lines.each do |line|
+        @lines.each do |line|
+          # Section headers are excluded from the VTT conversion as to
+          # match the regular captions returned from YouTube as much as possible
+          next if line.is_a? HeadingLine
+
           vtt.cue(line.start_ms, line.end_ms, line.line)
         end
       end
 
       return vtt
     end
-
-    private def self.parse(initial_data : Hash(String, JSON::Any))
-      body = initial_data.dig("actions", 0, "updateEngagementPanelAction", "content", "transcriptRenderer",
-        "content", "transcriptSearchPanelRenderer", "body", "transcriptSegmentListRenderer",
-        "initialSegments").as_a
-
-      lines = [] of TranscriptLine
-      body.each do |line|
-        # Transcript section headers. They are not apart of the captions and as such we can safely skip them.
-        if line.as_h.has_key?("transcriptSectionHeaderRenderer")
-          next
-        end
-
-        line = line["transcriptSegmentRenderer"]
-
-        start_ms = line["startMs"].as_s.to_i.millisecond
-        end_ms = line["endMs"].as_s.to_i.millisecond
-
-        text = extract_text(line["snippet"]) || ""
-
-        lines << TranscriptLine.new(start_ms, end_ms, text)
-      end
-
-      return lines
-    end
   end
 end

src/invidious/views/channel.ecr

@@ -30,13 +30,13 @@
 <meta property="og:site_name" content="Invidious">
 <meta property="og:url" content="<%= HOST_URL %>/channel/<%= ucid %>">
 <meta property="og:title" content="<%= author %>">
-<meta property="og:image" content="/ggpht<%= channel_profile_pic %>">
+<meta property="og:image" content="<%= HOST_URL %>/ggpht<%= channel_profile_pic %>">
 <meta property="og:description" content="<%= channel.description %>">
 <meta name="twitter:card" content="summary">
 <meta name="twitter:url" content="<%= HOST_URL %>/channel/<%= ucid %>">
 <meta name="twitter:title" content="<%= author %>">
 <meta name="twitter:description" content="<%= channel.description %>">
-<meta name="twitter:image" content="/ggpht<%= channel_profile_pic %>">
+<meta name="twitter:image" content="<%= HOST_URL %>/ggpht<%= channel_profile_pic %>">
 <link rel="alternate" type="application/rss+xml" title="RSS" href="/feed/channel/<%= ucid %>" />
 <%- end -%>
 

src/invidious/views/user/preferences.ecr

@@ -310,7 +310,7 @@
 
                 <div class="pure-control-group">
                     <label for="modified_source_code_url"><%= translate(locale, "adminprefs_modified_source_code_url_label") %></label>
-                    <input name="modified_source_code_url" id="modified_source_code_url" type="input" <% if CONFIG.modified_source_code_url %>checked<% end %>>
+                    <input name="modified_source_code_url" id="modified_source_code_url" type="url" value="<%= CONFIG.modified_source_code_url %>">
                 </div>
             <% end %>
 

src/invidious/views/watch.ecr

@@ -10,7 +10,7 @@
 <meta property="og:site_name" content="<%= author %> | Invidious">
 <meta property="og:url" content="<%= HOST_URL %>/watch?v=<%= video.id %>">
 <meta property="og:title" content="<%= title %>">
-<meta property="og:image" content="/vi/<%= video.id %>/maxres.jpg">
+<meta property="og:image" content="<%= HOST_URL %>/vi/<%= video.id %>/maxres.jpg">
 <meta property="og:description" content="<%= HTML.escape(video.short_description) %>">
 <meta property="og:type" content="video.other">
 <meta property="og:video:url" content="<%= HOST_URL %>/embed/<%= video.id %>">

src/invidious/yt_backend/youtube_api.cr

@@ -5,9 +5,6 @@
 module YoutubeAPI
   extend self
 
-  private DEFAULT_API_KEY = "AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8"
-  private ANDROID_API_KEY = "AIzaSyA8eiZmM1FaDVjRy-df2KTyQ_vz_yYM39w"
-
   # For Android versions, see https://en.wikipedia.org/wiki/Android_version_history
   private ANDROID_APP_VERSION = "19.14.42"
   private ANDROID_USER_AGENT  = "com.google.android.youtube/19.14.42 (Linux; U; Android 12; US) gzip"
@@ -52,7 +49,6 @@ module YoutubeAPI
       name:       "WEB",
       name_proto: "1",
       version:    "2.20240304.00.00",
-      api_key:    DEFAULT_API_KEY,
       screen:     "WATCH_FULL_SCREEN",
       os_name:    "Windows",
       os_version: WINDOWS_VERSION,
@@ -62,7 +58,6 @@ module YoutubeAPI
       name:       "WEB_EMBEDDED_PLAYER",
       name_proto: "56",
       version:    "1.20240303.00.00",
-      api_key:    DEFAULT_API_KEY,
       screen:     "EMBED",
       os_name:    "Windows",
       os_version: WINDOWS_VERSION,
@@ -72,7 +67,6 @@ module YoutubeAPI
       name:       "MWEB",
       name_proto: "2",
       version:    "2.20240304.08.00",
-      api_key:    DEFAULT_API_KEY,
       os_name:    "Android",
       os_version: ANDROID_VERSION,
       platform:   "MOBILE",
@@ -81,7 +75,6 @@ module YoutubeAPI
       name:       "WEB",
       name_proto: "1",
       version:    "2.20240304.00.00",
-      api_key:    DEFAULT_API_KEY,
       screen:     "EMBED",
       os_name:    "Windows",
       os_version: WINDOWS_VERSION,
@@ -94,7 +87,6 @@ module YoutubeAPI
       name:                "ANDROID",
       name_proto:          "3",
       version:             ANDROID_APP_VERSION,
-      api_key:             ANDROID_API_KEY,
       android_sdk_version: ANDROID_SDK_VERSION,
       user_agent:          ANDROID_USER_AGENT,
       os_name:             "Android",
@@ -105,13 +97,11 @@ module YoutubeAPI
       name:       "ANDROID_EMBEDDED_PLAYER",
       name_proto: "55",
       version:    ANDROID_APP_VERSION,
-      api_key:    "AIzaSyCjc_pVEDi4qsv5MtC2dMXzpIaDoRFLsxw",
     },
     ClientType::AndroidScreenEmbed => {
       name:                "ANDROID",
       name_proto:          "3",
       version:             ANDROID_APP_VERSION,
-      api_key:             DEFAULT_API_KEY,
       screen:              "EMBED",
       android_sdk_version: ANDROID_SDK_VERSION,
       user_agent:          ANDROID_USER_AGENT,
@@ -123,7 +113,6 @@ module YoutubeAPI
       name:                "ANDROID_TESTSUITE",
       name_proto:          "30",
       version:             ANDROID_TS_APP_VERSION,
-      api_key:             ANDROID_API_KEY,
       android_sdk_version: ANDROID_SDK_VERSION,
       user_agent:          ANDROID_TS_USER_AGENT,
       os_name:             "Android",
@@ -137,7 +126,6 @@ module YoutubeAPI
       name:         "IOS",
       name_proto:   "5",
       version:      IOS_APP_VERSION,
-      api_key:      "AIzaSyB-63vPrdThhKuerbB2N_l7Kwwcxj6yUAc",
       user_agent:   IOS_USER_AGENT,
       device_make:  "Apple",
       device_model: "iPhone14,5",
@@ -149,7 +137,6 @@ module YoutubeAPI
       name:         "IOS_MESSAGES_EXTENSION",
       name_proto:   "66",
       version:      IOS_APP_VERSION,
-      api_key:      DEFAULT_API_KEY,
       user_agent:   IOS_USER_AGENT,
       device_make:  "Apple",
       device_model: "iPhone14,5",
@@ -161,7 +148,6 @@ module YoutubeAPI
       name:         "IOS_MUSIC",
       name_proto:   "26",
       version:      "6.42",
-      api_key:      "AIzaSyBAETezhkwP0ZWA02RsqT1zu78Fpt0bC_s",
       user_agent:   "com.google.ios.youtubemusic/6.42 (iPhone14,5; U; CPU iOS 17_4 like Mac OS X;)",
       device_make:  "Apple",
       device_model: "iPhone14,5",
@@ -176,13 +162,11 @@ module YoutubeAPI
       name:       "TVHTML5",
       name_proto: "7",
       version:    "7.20240304.10.00",
-      api_key:    DEFAULT_API_KEY,
     },
     ClientType::TvHtml5ScreenEmbed => {
       name:       "TVHTML5_SIMPLY_EMBEDDED_PLAYER",
       name_proto: "85",
       version:    "2.0",
-      api_key:    DEFAULT_API_KEY,
       screen:     "EMBED",
     },
   }
@@ -237,11 +221,6 @@ module YoutubeAPI
       HARDCODED_CLIENTS[@client_type][:version]
     end
 
-    # :ditto:
-    def api_key : String
-      HARDCODED_CLIENTS[@client_type][:api_key]
-    end
-
     # :ditto:
     def screen : String
       HARDCODED_CLIENTS[@client_type][:screen]? || ""
@@ -606,7 +585,7 @@ module YoutubeAPI
     client_config ||= DEFAULT_CLIENT_CONFIG
 
     # Query parameters
-    url = "#{endpoint}?key=#{client_config.api_key}&prettyPrint=false"
+    url = "#{endpoint}?prettyPrint=false"
 
     headers = HTTP::Headers{
       "Content-Type"              => "application/json; charset=UTF-8",