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コミュニティ運営 Hacker News · 2025-04-14

BitTorrentのようなP2Pライブ配信プロトコルはなぜ存在しないのか?

Why is there no P2P streaming protocol like BitTorrent?

30秒でわかる要約
  • 誰がHacker News · 2025-04-14 · 236 賛成 · 223 返信
  • 何を求めているかBitTorrentのようなP2Pライブ配信プロトコルはなぜ存在しないのか?
  • 何を作れるかP2P acceleration for small live platforms, priced as a share of bandwidth saved.

元スレッドの発言

“Why there is no P2P protocol for mass live stream content in decent quality?… i cant find anything.”

— Hacker News · 2025-04-14 · news.ycombinator.com/item?id=43684286…

背景と課題

痛みのポイント

ライブ配信の帯域コストは非常に高く、中小プラットフォームは一回のイベントで一か月分の予算を使い切ります。

プロダクトの切り口

何を作れるか

P2P acceleration for small live platforms, priced as a share of bandwidth saved.

検証のしかた

  1. スレッドの返信をすべて読み、繰り返し出てくる具体的な場面を書き出します。繰り返しこそ需要の密度です。
  2. 「live streaming / P2P」関連の既存ツールを調べ、どの一部分しかカバーしていないかを確認します。
  3. 一言ランディングページを作り、Hacker News に投稿して価格を聞く人が現れるか見ます。

既存の選択肢

WebTorrent, Peer5, Cloudflare Stream

スレッドの声 · 人気コメント

People have tried to build BitTorrent clients to do this. As far as I know they never took off. The primary problem is you oftentimes don't get people who want to share back or who have firewalls or other connections that don't allow them to share back. So you end up with a few people who end up seeding everything out. The second problem is in order to watch a streaming protocol things need to arrive in order. It is totally possible to do with BitTorrent and request the blocks in the order that you want but you may not always be able to get them in the order you want. In general people aren't

— elmerfud

what about having something reasonable for lag, like 30-60 seconds would that make a big difference or you think it would just eventually degrade too? Also do you think there's any way you can prioritize seeders in such a protocol? like some kind of algorithm that the more you share the more you're prioritized in getting the most up to date packets. The main reason I would think it would be useful is 1. since streaming sites seem to lose a lot of money and 2. sports streams are really bad, even paid ones. I have dazn and two other sports streaming services and they still lag and are only 720p

— memet_rush

With sports streams you specifically want low lag, don’t you? It’s no fun being spoilered by people cheering (or not) next door.

— dave4420
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