tor4kichi
commented
8 months ago 超低画質時、音質を指定していないせいか最低音質が選ばれている様子。
音質もユーザーが指定できるようにする？
Open tor4kichi opened 9 months ago
tor4kichi
commented
8 months ago 超低画質時、音質を指定していないせいか最低音質が選ばれている様子。
音質もユーザーが指定できるようにする？
tor4kichi
commented
8 months ago https://www.nicovideo.jp/watch/so42997483
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"viewTitle": "うぽつ",
"summary": "うぽつとはうｐ乙のことでうｐ(アップロード)乙(お疲れ様です)という意味。語源はうｐと乙をローマ字で打つと「うぽつ」（up otu→u po tu）になることから。\n類義語にうぱりがある。\n関連項目\n",
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"nicodic": {
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"viewTitle": "www",
"summary": "wwwとは\n World Wide Web（ワールドワイドウェブ）\n ASIAN KUNG-FU GENERATIONの4thフルアルバム『ワールド ワールド ワールド』の省略表記\n QuinRose",
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"viewTitle": "すき",
"summary": "もしかして? → 好き\nひょっとして? → 鋤\n概要\n隙ありっ! これで全部だと思うたか!?\n関連静画\n関連項目\n すすきの\n 自動リンクされていない記事の一覧",
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"text": "！？",
"nicodic": {
"title": "!?",
"viewTitle": "！？",
"summary": "概要!?\n!?とは\"強烈\"かつ\"理解不能\"な驚きを示す約物（記号）である…!?\n専門用語では「感嘆符疑問符」という名前である。投げやりじゃねえか!? 略すると「感嘆修辞疑問符」という長ったらしい上によ",
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"text": "88888888",
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"viewTitle": "88888888",
"summary": "8は整数のひとつ。7の次、9の前。\n概要\n酸素(O)の原子番号。\n横に倒すと∞になってしまうので注意。8からずいぶん離れてしまう。\n「八」は末広がりの形をしているため、縁起の良い数とされる。\nニコニコ",
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}新サーバーにおける動画再生までの流れ
initial-watch-dataにあるjsonをパースmedia.domand.videos および media.domand.audios から任意の動画と音声のクオリティを選択 https://nvapi.nicovideo.jp/v1/watch/{{video.id}}/access-rights/hls?actionTrackId={{videoAds.additionalParams.watchTrackId}} にPOST
3.1 リクエストヘッダーに以下を追加
3.1.1 キー：X-Access-Right-Key 値：{{media.domand.accessRightKey}}
3.1.2 キー：X-Frontend-Version 値：0
3.1.3 キー：X-Frontend-Id 値：6
3.1.4 キー：X-Request-With 値：https://www.nicovideo.jp
3.2 リクエストコンテンツに以下を設定
3.2.1 json {"outputs":[["video-h264-144p","audio-aac-128kbps"]]}
3.2.2 画質・音質の値は media.domand.videos 等の id を指定します
3.3 追記 2023-11-13）actionTrackIdは必須です。無い場合は失敗します。data.contentUrl を用いてメディア再生を行う(3)のレスポンス例
{
"meta": {
"status": 201
},
"data": {
"contentUrl": "https://delivery.domand.nicovideo.jp/hls/654b11200d7d2ef695f075ba/playlists/variants/1e1d32ffbbec3289.m3u8",
"createTime": "2023-11-10T17:00:28+09:00",
"expireTime": "2023-11-11T17:00:28+09:00"
}
}Windows系であればdata.contentUrl を使ってAdaptiveMediaSourceを生成してMediaPlayer.Sourceに指定すれば再生できると思われます （未検証） 2023-11-11 追記：再生可能を確認
tor4kichi
commented
8 months ago (3)のリクエストコンテンツを {"outputs":[["audio-aac-128kbps"]]} などと指定すれば音声のみのストリームを取得できるようです。
まだ再生までは試してないです。 （2023-11-11追記： 再生できました。映像ストリームが空の状態で音声だけで再生可能です）
tor4kichi
commented
8 months ago tor4kichi
commented
8 months ago media.videos[].recommendedHighestAudioQualityLevel が示す音声クオリティはユーザーがエコノミーモードの状態では利用できない場合があります。IsAvairable == true の音質を指定すればOK
tor4kichi
commented
8 months ago 現状では音声クオリティは192kbpsと64kbpsの２種類のみのようです。エコノミーモードでは64kbpsのみが再生可能。
動画の画質を指定せずに音声ストリームのみを取得する場合でも、エコノミーモード状態では192kbpsは取得できませんでした。
tor4kichi
commented
8 months ago 上記対応を追加した NiconicoTookit v0.5.x を nuget で公開してます。
元記事：https://blog.nicovideo.jp/niconews/205042.html
11/1以降に投稿された動画から、モバイル向け画質（360p）が超低画質（144p）に置き換えられた状態で配信されるようになります。
11/1以前の動画は影響を受けないようです。
Hohoemaにおいては表示用画質の判定周りに依存コードがあるかもしれないので一度チェックしておいたほうがいいかもしれません。