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webrtc: route original absolute timestamp of packets (#1300) (#4415)

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Alessandro Ros
2025-04-12 11:34:27 +02:00
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parent 49bcd35afd
commit 77a3c7ae6e
15 changed files with 223 additions and 68 deletions
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@@ -1712,13 +1712,21 @@ The command inserted into `runOnDemand` will start only when a client requests t
Some streaming protocols allow to route absolute timestamps, associated with each frame, that are useful for synchronizing several video or data streams together. In particular, _MediaMTX_ supports receiving absolute timestamps with the following protocols and devices:
* HLS (through the `EXT-X-PROGRAM-DATE-TIME` tag in playlists)
* RTSP (through RTCP reports, when `rtspAbsoluteTimestamp` is `true` in settings)
* RTSP (through RTCP reports, when `useAbsoluteTimestamp` is `true` in settings)
* WebRTC (through RTCP reports, when `useAbsoluteTimestamp` is `true` in settings)
* Raspberry Pi Camera
and supports sending absolute timestamps with the following protocols:
* HLS (through the `EXT-X-PROGRAM-DATE-TIME` tag in playlists)
* RTSP (through RTCP reports)
* WebRTC (through RTCP reports)
A library that can read absolute timestamps with HLS is [gohlslib](https://github.com/bluenviron/gohlslib)
A library that can read absolute timestamps with RTSP is [gortsplib](https://github.com/bluenviron/gortsplib)
A browser can read read absolute timestamps with WebRTC if it exposes the [estimatedPlayoutTimestamp](https://www.w3.org/TR/webrtc-stats/#dom-rtcinboundrtpstreamstats-estimatedplayouttimestamp) statistic.
### Expose the server in a subfolder