v0.1.0

🧪 The first beta: the API follows the specifications and is ready to build on, while compatibility between versions isn't guaranteed until 1.0.0

⚡ Data channels move 1.2–2.1 Gbps, 7.7–14.6x aiortc's throughput at 10–15% of its CPU per MB. See the benchmarks

🚀 A data channel opens 3.5 ms after createOffer, 7–8x faster than aiortc, and getStats takes 1.7 instead of 4.2 ms

🎥 Simulcast for every encoder, and H.264 on macOS that recovers from encoder faults and falls back to OpenH264

🧭 Transceiver, ICE, SCTP and track state change with the events that report them, as in browsers

🧩 Examples of a server for a browser page, a Gemini Live voice agent, and WHIP/WHEP streams

• Add simulcast for every encoder, on Windows too: each layer is sent in the negotiated codec at its scaled size, whether or not the encoder does simulcast itself. VP9 and AV1 need a scalabilityMode such as L1T1 for each layer by @MarshalX in #254
• Fall back to OpenH264, once await webrtc.openh264.install() has run, when VideoToolbox can't encode or decode by @MarshalX in #254
• Show transceiver, ICE, SCTP and track state with the events that change them: mid, currentDirection and the selected candidate pair change when their event fires, not before by @MarshalX in #259
• Add a Python server for a browser page example: your camera comes back in grayscale, and Python answers a chat over a data channel by @MarshalX in #268
• Add a Gemini Live voice agent example, with the API key kept on the server by @MarshalX in #268
• Add a WHIP/WHEP example that plays a live stream in the terminal or publishes one by @MarshalX in #268
• Add llms.txt, Markdown versions of the docs pages and Context7 and DeepWiki configs by @MarshalX in #265
• Credit node-webrtc in the third-party licences by @MarshalX in #262
• Speed up connection setup: keep libsrtp initialized and the network list updated, start the network manager and create port allocators without waiting on the network thread by @MarshalX in #261
• Speed up the first connection by running libsrtp's self-tests on their own thread by @MarshalX in #261
• Gather a candidate pool without waits between phases, and add ICE candidates in one signaling task by @MarshalX in #261
• Cut thread hops from negotiation and getStats, and share concurrent getStats calls: 20 of them take 5.7 instead of 80.9 ms, renegotiation 22% less time and warm setup with trickle 18% less by @MarshalX in #255
• Cut signaling-thread waits from getters: transceiver.mid takes 1.0 instead of 9.8 µs, sender.track 38% less time, getSelectedCandidatePair() 46% less and renegotiation 15% less by @MarshalX in #259
• Speed up data channels on macOS and Linux with a second, connected socket for a busy peer. Set the PythonWebRTC-ConnectedSockets field trial to Disabled to turn it off by @MarshalX in #261
• Speed up data channel sends with one network-thread task per send, and skip the local address lookup on every UDP packet by @MarshalX in #261
• Convert received data channel messages once and deliver them with less Python per message by @MarshalX in #261
• Copy data channel messages once: 10–11% more throughput and 7–11% less CPU per MB for 1 KB messages by @MarshalX in #252
• Speed up event delivery, skip wake-ups while the event loop drains, and cache session descriptions between the events that change them by @MarshalX in #261
• Drop the unused audio processing and video render smoothing, which cost CPU on every received stream by @MarshalX in #249
• Send VP8 and H.264 at 720p with 6–9% less CPU per frame by @MarshalX in #256
• Wrap NV12 frames without copies, pass NV12 to VideoToolbox as it is, and pool frame buffers by @MarshalX in #257
• Copy video frame data once into pooled buffers, and convert VideoToolbox output to I420 in one pass by @MarshalX in #261
• Copy encoded frames less and cache RTP sources: 14% less CPU per transformed frame, getSynchronizationSources() in 1.3 instead of 14.8 µs. A transform now queues up to 60 unread frames instead of 120 by @MarshalX in #258
• Fix sockets raising SIGPIPE on macOS, which kills the process where its default handler is restored by @MarshalX in #267
• Fix data channel stalls under load: UDP sockets get a receive buffer of at least 8 MB, which WebRTC-SetSocketReceiveBuffer overrides. On Linux, raise net.core.rmem_max to allow it. See Field trials by @MarshalX in #261
• Fix a VideoToolbox frame that fails after the encoder took it: the session restarts with a key frame by @MarshalX in #254
• Fix a connection kept alive after close() by the event loop it was bound to while closing by @MarshalX in #261
• Fix the operations of a closed event loop keeping their connections alive by @MarshalX in #261
• Fix the next operation starting before the code awaiting the previous one resumes, as in browsers by @MarshalX in #259
• Fix addIceCandidate without a remote description rejecting late; it now rejects at once by @MarshalX in #261
• Fix sends that fail as the remote end closes: they fire error with data-channel-failure, and their bytes stay in bufferedAmount by @MarshalX in #252
• Fix remote data channels collected before their open event by @MarshalX in #259
• Fix DTMF tones and gaps raised to longer minimums than the specification's by @MarshalX in #253
• Fix standalone ICE gathering waiting 1 s between phases and gathering passive TCP candidates, and gather IPv6 where the host has it by @MarshalX in #253
• Fix the end of candidates of an earlier remote description shown after an ICE restart by @MarshalX in #253
• Fix the audio capture time, so the jitter doesn't jump after a send pause by @MarshalX in #253
• Fix VideoTrackGenerator frames written back to back dropped as duplicates by @MarshalX in #256
• Fix relayed remote video not scaled down for its encoder at low bitrates, and a sent track's own sinks getting the encoder's smaller frames by @MarshalX in #256
• Fix encoded frames a transform drops staying in memory while the event loop is busy or closed by @MarshalX in #260
• Fix writes to a writable stream slowing down as its queue grows by @MarshalX in #264
• Fix the empty reason in the OpenAI example's connection error by @MarshalX in #264
• Fix the OpenAI example printing the API key in --help by @MarshalX in #268
• Fix the memory benchmark table when a run stops early at the memory limit, and benchmark charts crashing on a zero value or baseline by @MarshalX in #264
• Fix the connections guide's advice to wait for complete ICE gathering, which can take about 40 seconds with a STUN server by @MarshalX in #268