RTMS SDK v1.1.0. For more information, see the Changelog  on GitHub.

Added#

ZCC (Zoom Contact Center) Support#

• engagement_id in join(): ZCC voice engagements identify sessions with an engagement_id instead of meeting_uuid; join() now accepts engagement_id as an alternative identifier (all bindings)
• ZCC event constants: EVENT_CONSUMER_ANSWERED, EVENT_CONSUMER_END, EVENT_USER_ANSWERED, EVENT_USER_END, EVENT_USER_HOLD, EVENT_USER_UNHOLD exported as flat module-level constants in both Node.js and Python

Transcript Configuration#

• TranscriptParams: New parameter class for configuring transcript streams (language hint, content type, language detection)
• TranscriptLanguage constants: Full set of language constants (ENGLISH, SPANISH, JAPANESE, CHINESE_SIMPLIFIED, and many more) for skipping auto-detection (~3s delay) by hinting the source language
• setTranscriptParams()/set_transcript_params(): New method on Client to apply transcript configuration before joining (Node.js and Python)

HTTP Proxy Support#

• setProxy()/set_proxy(): New method on Client for configuring HTTP and HTTPS proxies for RTMS connections (Node.js and Python)

Individual Video Streams#

• subscribeVideo()/subscribe_video(): Subscribe or unsubscribe per-participant video when using VIDEO_SINGLE_INDIVIDUAL_STREAM mode
• onParticipantVideo()/on_participant_video(): Callback fired when a participant's video turns on or off
• onVideoSubscribed()/on_video_subscribed(): Callback fired with the result of each subscribeVideo() call
• EVENT_PARTICIPANT_VIDEO_ON / EVENT_PARTICIPANT_VIDEO_OFF: Exported as flat module-level constants in both Node.js and Python

Python — Concurrency & Scaling#

• EventLoop / EventLoopPool: New primitives for fine-grained control over polling threads; EventLoop wraps a dedicated background thread, EventLoopPool balances clients across a pool of threads
• run_async(): Drop-in async replacement for run() using asyncio.sleep() between polls; composes naturally with aiohttp, FastAPI, asyncpg
• Executor dispatch: Client(executor=...) and run(executor=...) / run_async(executor=...) dispatch data callbacks to a concurrent.futures.Executor, keeping the poll loop fast for CPU-bound or I/O-heavy callbacks
• Async callback detection: Coroutine callbacks are detected automatically and scheduled on the running event loop via asyncio.run_coroutine_threadsafe
• GIL release in poll(): The C++ poll call now releases the GIL, allowing other Python threads (e.g. the webhook HTTP server) to run freely during polling
• Context manager support: with rtms.Client() as client: guarantees leave() is called on exit
• Lazy alloc() / thread affinity: Client() construction is safe from any thread; the C SDK handle is allocated lazily on the EventLoop's own thread to satisfy the C SDK's thread-affinity constraint
• Snake_case aliases: All camelCase methods have snake_case aliases (on_audio_data, set_audio_params, subscribe_event, etc.)

Metadata & AI Interpreter Fields#

• Full metadata fields: Metadata now exposes userId, userName, startTs, endTs in both bindings
• AiInterpreter fields: Metadata now exposes aiInterpreter with language pair targets from the AI language interpreter SDK feature

Constants & Enums#

• IntEnum for Python codec/rate/option types: AudioCodec, VideoCodec, AudioSampleRate, AudioChannel, DataOption are now proper Python IntEnum values (comparisons with integers still work)
• DataOption: Unified stream delivery mode enum covering both audio (AUDIO_MIXED_STREAM, AUDIO_MULTI_STREAMS) and video (VIDEO_SINGLE_ACTIVE_STREAM, VIDEO_SINGLE_INDIVIDUAL_STREAM, VIDEO_MIXED_GALLERY_VIEW) options — mirrors the C++ MEDIA_DATA_OPTION enum directly; AudioDataOption and VideoDataOption kept as backward-compat aliases
• Bidirectional param aliases: All four param structs (AudioParams, VideoParams, DeskshareParams, TranscriptParams) now accept both snake_case and camelCase field names so existing code continues to work regardless of convention

Fixed#

• Spurious configure warnings on leave: updateMediaConfiguration was called during callback teardown after the session was already closed, printing 4 "Failed to update media configuration" warnings on every clean leave; suppressed by tracking sdk_opened_ state and calling markClosed() before stopping callbacks

Changed#

• Protocol enums moved to rtms.h: EVENT_TYPE, ZCC_VOICE_EVENT_TYPE, SESSION_STATE, STREAM_STATE, MESSAGE_TYPE, STOP_REASON, and TRANSCRIPT_LANGUAGE are now defined in the shared C++ header, making them automatically available to both Node.js and Python bindings