Stream from experimental Niconama

[AlexAplin]

http://site.nicovideo.jp/nicocas/pc/ https://live.nicovideo.jp/recent?tab=nicocas

Nico is experimenting with additional live features. As part of this, the live infrastructure seems to have moved to DMC.

Page URL: https://cas.nicovideo.jp/user/[user_id]/[live_id] API root URL: https://api.cas.nicovideo.jp/v1/services/live/programs/[live_id]

• OPTIONS /watching-qualities
  • GET /watching-qualities
  • Available qualities (superhigh, high, middle, low)
• OPTIONS /watching
  • POST /watching
  • 201 Created
  • Program metadata, commenting WebScoket server and threads, master stream URL
  • PUT /watching
  • 200 OK
  • Stream URL

General flow seems to be:

• OPTIONS to /watching-qualities

  • Access-Control-Request-Method: GET
  • Access-Control-Request-Headers: x-connection-environment,x-frontend-id
  • Origin: https://cas.nicovideo.jp

• GET to /watching-qualities

  • X-Frontend-Id: 91
  • X-Connection-Environment: ethernet

• OPTIONS to /watching

  • Access-Control-Request-Method: GET
  • Access-Control-Request-Headers: content-type,x-connection-environment,x-frontend-id
  • Origin: https://cas.nicovideo.jp

• POST to /watching

  • Content-Type: application/json
  • X-Frontend-Id: 91
  • X-Connection-Environment: ethernet
  • audienceToken cookie
  • JSON data:
    • actionTrackId: unique identifier, e.g. d558874173_151779710194. Must be of the form [0-9a-f]{10}_[epoch_value]
    • isBroadcaster: false
    • streamCapacity: highest quality reported by /watching-qualities
    • streamProtocol: https
    • streamQuality: auto or highest available
  • Master stream URL in response at [data][streamServer][url]
    • [root_dmc_url] + [playlist], e.g. https://pa055fd0b1d.dmc.nico/hlslive/ht2_nicolive/nicolive-production-pg9104945840708_6b5508405a67e8b4eb92202994cae713281e54c2d98da1f7f900e7c7c3308f6b/4/ts/playlist.m3u8?ht2_nicolive=34523456.0wwmcd_pnv8ek_9toj69v66xwy

• PUT to /watching every 20 seconds

  • Master and playlist URLs will change and must be updated

[AlexAplin]

The PUT request is required to keep playlist URLs active, but it doesn't ever seem to change. We need a better solution for streaming to external players rather than work with the assumption that the URLs are constant.

[AlexAplin]

Added basic support in https://github.com/AlexAplin/nndownload/commit/88fe817cd00ea72c61712c969b1d0efa67ff5f95. I'll continue to improve it.