new whip server

[j0sh]

Introduces a WHIP endpoint at /live/video-to-video/{streamid}/whip

This strictly affects ingest only; it does not touch selection, trickle or anything beyond those.

There should also be no changes to the existing MediaMTX whip / rtmp ingest. The old ingest is safe to run alongside this and there should be no behavioral changes to that. The one modification is to tighten up request methods in the HTTP handler (adding POST prefixes etc) to prevent route conflicts with the new WHIP endpoints.

New Configuration Options

Currently implemented directly as environment variables.

• LIVE_AI_WHIP_ADDR: UDP binding address for WebRTC (default: 0.0.0.0:7290)
• LIVE_AI_NAT_IP: Public IP for NAT traversal (optional)
• LIVE_AI_VIDEO_GATHER_TIMEOUT: Timeout for gathering video tracks (default: 5 seconds)
• LIVE_AI_PLAYBACK_HOST: RTMP URL for output (default: rtmp://localhost/)
• LIVE_AI_ALLOW_CORS: Enable CORS headers for browser clients (optional)

Other Changes

Added a clog.Info function for a slog-style logging API

Not Yet Implemented

• Proper handling + documentation for the new configuration vars
• ICE restarts + trickle ICE
• DELETE
• TCP, TURN, etc

These todos are all in Linear for later follow-up.

[codecov]

Codecov Report

Attention: Patch coverage is 6.12485% with 797 lines in your changes missing coverage. Please review.

Project coverage is 31.61087%. Comparing base (9a27435) to head (a620120).

Files with missing lines	Patch %	Lines
media/whip_server.go	0.00000%	493 Missing ⚠️
server/ai_mediaserver.go	3.31126%	145 Missing and 1 partial ⚠️
media/rtp_segmenter.go	0.00000%	129 Missing ⚠️
clog/clog.go	0.00000%	29 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                 @@
##              master       #3432         +/-   ##
===================================================
- Coverage   32.16679%   31.61087%   -0.55592%     
===================================================
  Files            147         150          +3     
  Lines          41033       41878        +845     
===================================================
+ Hits           13199       13238         +39     
- Misses         27058       27863        +805     
- Partials         776         777          +1     

Files with missing lines	Coverage Δ
media/whip_connection.go	100.00000% <100.00000%> (ø)
clog/clog.go	53.76344% <0.00000%> (-9.93083%)	⬇️
media/rtp_segmenter.go	0.00000% <0.00000%> (ø)
server/ai_mediaserver.go	5.82011% <3.31126%> (-1.24065%)	⬇️
media/whip_server.go	0.00000% <0.00000%> (ø)

... and 2 files with indirect coverage changes

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Files with missing lines	Coverage Δ
media/whip_connection.go	100.00000% <100.00000%> (ø)
clog/clog.go	53.76344% <0.00000%> (-9.93083%)	⬇️
media/rtp_segmenter.go	0.00000% <0.00000%> (ø)
server/ai_mediaserver.go	5.82011% <3.31126%> (-1.24065%)	⬇️
media/whip_server.go	0.00000% <0.00000%> (ø)

... and 2 files with indirect coverage changes

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[j0sh]

Added the ability to disable WHIP ingest entirely by omitting the LIVE_AI_WHIP_ADDR env var. This was mostly done to fix tests but may be useful if we need to disable whip for whatever reason, without a roll back. 522d9e6

Ideally we'd have a CLI argument like -whipIngest but that can come later.