BuildArgs hardcoded -map 0✌️0 / -map 0🅰️0 for the two RTP legs.
Correct for production RTMP/SRT publishers (single combined input),
but breaks any process whose audio lives on a different input index
— multi-input lavfi test scaffolds, multi-camera pipelines, SDI +
file-audio mixes, etc.
Adds VideoMap and AudioMap fields to ConfigWebRTC (and the API DTO),
defaulting to the prior literals so existing deployments are
unaffected. BuildArgs reads them.
Tests:
- TestBuildArgs_DefaultMaps locks the empty-string default behavior
- TestBuildArgs_CustomMaps drives the multi-input override path
- TestProcessConfigWebRTCMapsRoundtrip extends the DTO roundtrip
Closes#2.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Adds Alloc(), the ephemeral loopback UDP port grabber the subsystem
uses to pick the RTP port it will hand to FFmpeg and then re-bind with
core/webrtc.NewSourceOn. Covered by a 100x rebind test.
Adds BuildArgs(), which emits the -f rtp output fragments (video on
the passed port, audio on port+1) with copy codecs by default and an
H.264 baseline / libopus re-encode leg when ForceTranscode is set.
Covered by three unit tests.
