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https://github.com/AlexxIT/go2rtc.git
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Sergey Krashevich
1856b7ace4
The HKSV recording was failing because: 1. The dataSend.data message structure was wrong - `packets` was a flat integer instead of an array of objects with `data` and `metadata` fields matching the HAP-NodeJS specification 2. Each video/audio frame was sent as a separate mediaFragment, but Home Hub expects GOP-based fragments (~2-4 seconds of accumulated data) 3. Large fragments were not chunked (max 256 KiB per chunk) Changes: - Fix HDS dataSend.data message structure to use proper packets array with nested data/metadata (dataType, dataSequenceNumber, dataChunkSequenceNumber, isLastDataChunk, dataTotalSize) - Add 256 KiB chunking for large media fragments - Buffer moof+mdat pairs in hksvConsumer and flush on keyframe boundaries (GOP-based fragmentation) - Pre-start consumer at pair-verify for instant init segment delivery - Add write-response support to HAP PUT handler for ch131 DataStream setup - Fix HAP service linking to match HAP-NodeJS reference - Add default SelectedCameraRecordingConfiguration (ch209) value - Start continuous motion generator at pair-verify with dedup protection
Home Accessory Protocol
PS. Character = Characteristic
Device - HomeKit end device (swith, camera, etc)
- mDNS name:
MyCamera._hap._tcp.local. - DeviceID - mac-like:
0E:AA:CE:2B:35:71 - HomeKit device is described by:
- one or more
Accessories- hasAIDandServices Services- hasIID,TypeandCharactersCharacters- hasIID,Type,FormatandValue
- one or more
Client - HomeKit client (iPhone, iPad, MacBook or opensource library)
- ClientID - static random UUID
- ClientPublic/ClientPrivate - static random 32 byte keypair
- can pair with Device (exchange ClientID/ClientPublic, ServerID/ServerPublic using Pin)
- can auth to Device using ClientPrivate
- holding persistant Secure connection to device
- can read device Accessories
- can read and write device Characters
- can subscribe on device Characters change (Event)
Server - HomeKit server (soft on end device or opensource library)
- ServerID - same as DeviceID (using for Client auth)
- ServerPublic/ServerPrivate - static random 32 byte keypair
AAC ELD
Requires ffmpeg built with --enable-libfdk-aac
-acodec libfdk_aac -aprofile aac_eld
| SampleRate | RTPTime | constantDuration | objectType |
|---|---|---|---|
| 8000 | 60 | =8000/1000*60=480 | 39 (AAC ELD) |
| 16000 | 30 | =16000/1000*30=480 | 39 (AAC ELD) |
| 24000 | 20 | =24000/1000*20=480 | 39 (AAC ELD) |
| 16000 | 60 | =16000/1000*60=960 | 23 (AAC LD) |
| 24000 | 40 | =24000/1000*40=960 | 23 (AAC LD) |
Useful links
- https://github.com/apple/HomeKitADK/blob/master/Documentation/crypto.md
- https://github.com/apple/HomeKitADK/blob/master/HAP/HAPPairingPairSetup.c
- Extracting HomeKit Pairing Keys
- HAP in AirPlay2 receiver
- HomeKit Secure Video Unofficial Specification
- Homebridge Camera FFmpeg
- https://github.com/ljezny/Particle-HAP/blob/master/HAP-Specification-Non-Commercial-Version.pdf