DemandHunt 海外社區機會雷達
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社區運營 Hacker News · 2025-04-14

為什麼沒有 BitTorrent 那樣的 P2P 直播協議?

Why is there no P2P streaming protocol like BitTorrent?

30 秒速覽
  • 誰在提Hacker News · 2025-04-14 · 236 贊 · 223 評
  • 想要什麼為什麼沒有 BitTorrent 那樣的 P2P 直播協議?
  • 能做成什麼面向中小直播的 P2P 加速層(觀眾互傳 + 邊緣回源),按節省的帶寬分成。

原帖原話

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

“我一直在想,為什麼沒有一種能高質量分發大規模直播內容的 P2P 協議?是技術限制,還是大家都怕被媒體公司的律師搞死?我找了很久都沒找到。”

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

需求背景與痛點

痛在哪

直播帶寬成本極高,中小平臺一場活動就能燒掉一個月預算。

可以做成什麼

能做成什麼

面向中小直播的 P2P 加速層(觀眾互傳 + 邊緣回源),按節省的帶寬分成。

怎麼驗證它

  1. 讀完原帖的評論區,把重複出現的具體場景記下來——重複次數就是需求的密度。
  2. 搜索「直播 / P2P」相關的現有工具,確認它們只覆蓋了哪一環。
  3. 用一句話落地頁,投回 Hacker News 或同類社群,看有沒有人主動問價格。

已有方案與差異

WebTorrent、Peer5(被收購)、Cloudflare Stream

社區原聲 · 熱門評論

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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