Feature overview-Intelligent Media Services(IMS)-阿里云帮助中心

Alibaba Cloud Real-time Communication (ARTC) provides a range of features for building real-time audio and video applications.

Basic features

Feature	Description
ARTC application management	Create an ARTC application to enable features such as calls, voice chats, and meetings.
Configure and control video	Configure video encoding attributes.
Common audio operations	Perform common audio operations and configure audio settings.
Channel connection status management	Learn about channel connection states, state change causes, and recommended actions.
Screen sharing	Share your screen with other users.
Voice changer, reverb, and vocal beautification	Apply voice changer, reverb, and voice beautification effects during RTC sessions.
Device testing before a call	Test your audio and video devices before a call.
Network quality testing before a call	Test network quality before a call.
SEI transmission	Transmit custom data from the RTC system to ApsaraVieo Live or third-party live streaming platforms.
Automatic stream ingest and pulling	Automatically ingest and pull streams.
Custom messages	Send and receive custom messages alongside audio and video streams.
Quality monitoring	Query application-level metrics such as video and audio rebuffering rates to assess RTC service quality.

Advanced features

Category	Feature	Description
Media stream encoding and processing	Configure and control video	Configure various video encoding properties.
	Set audio encoding mode and scene mode	Configure audio encoding modes and scene-specific audio profiles.
	Implement screen sharing	Share your screen on Windows, iOS, and Android devices.
	Custom video capture	Capture video from custom sources and manage video devices.
	Custom video rendering	Process and play back video with custom rendering modules.
	Raw video data processing	Retrieve and process video data from the SDK through video observers.
	Custom audio capture	Capture audio from custom sources and manage audio devices.
	Custom audio playback	Process and play back audio with a custom playback module.
	Play and push external audio inputs	Play back and ingest external audio inputs locally.
Device and routing management	Pre-call device test	Test devices before a call to identify and resolve issues in advance.
	Test network quality before a call	Test local network quality before joining a channel.
	Manage video capture devices	List video input and output devices on platforms such as iOS, Android, and Windows, and retrieve details such as device names and IDs.
	Configure audio routing	Customize the audio playback device for your specific scenarios.
Communication and connection management	Cross-channel subscription	Communicate across different channels.
	Manage channel connection states	Monitor channel connection states, understand reasons for state changes, and handle transitions with appropriate methods.
	Automatic stream ingest and pulling	Implement audio and video streaming by calling interfaces for joining a channel, leaving a channel, and switching roles.
Data transmission and sound effects	Send and receive SEI messages	Send custom messages from ARTC to ApsaraVideo Live or third-party live streaming platforms.
	Custom Message Sending and Receiving	Send custom real-time messages alongside audio and video data.
	Configure voice change, reverberation, and voice beautification	Apply built-in audio effects such as voice changing, reverberation, and voice beautification during real-time communication.