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CSS
Cloud Streaming Services
Cloud Streaming Services
Tencent Cloud Streaming Services delivers low-latency, stable, and smooth streaming performance across diverse scenarios such as sports events and game streaming, and has been widely recognized by leading industry institutions.
Tencent Cloud Streaming Services delivers low-latency, stable, and smooth streaming performance across diverse scenarios such as sports events and game streaming, and has been widely recognized by leading industry institutions.
Core advantages
CSS core data
3000+
3,000+ global nodes with coverage across major carriers ensure stable and reliable access quality.
100Tbps
Massive bandwidth reserves with over 100 Tbps of total network capacity.
Save 30%
High-definition, low-bitrate streaming helps reduce data transfer and storage costs by over 30%.
7×24
24/7 full-network health monitoring ensures reliable and stable service delivery.
A world-leading infrastructure for live video streaming
Recommended purchase
Drive agile business growth with first-order discounts starting at 40% off, and flexibly choose the traffic package that best fits your business scale. Rules
CSS Traffic Package
CSS Traffic Package
CSS Traffic Package 200TB
CSS Traffic Package 1PB
Application scenarios
Covering five core scenarios—e-commerce, live shows, education, sports, and gaming—CSS provides tailored live streaming solutions for different industries.
Sports Live Streaming
Game Live Streaming
E-commerce Live Streaming
Live Show Streaming
Online Education
Sports Live Streaming
Game Live Streaming
E-commerce Live Streaming
Live Show Streaming
Online Education
Live Event
Smooth Viewing Experience:Adaptive bitrate (ABR) reduces buffering and improves playback quality.
Time-shifting for Sports Events:Seamless live-to-recorded integration with pause and rewind capabilities.
Real-time Data Overlay:Real-time match data overlay for instant result delivery.
Related Item
Product Features and Capabilities
Powered by advanced AI models, six intelligent capabilities enhance live content creation and operational efficiency, helping you build differentiated competitive advantages.
Highlight Capture
Identifies highlight regions across different scenarios, such as faces, in-game heroes, basketballs, and scoreboards.
Live Trans & Translate
Converts live speech into subtitles in real time, and supports target-language translation and simultaneous interpretation.
Smart Highlight
Intelligently detects standout moments and automatically generates highlight clips, turning every exciting frame into shareable traffic-driving content.
Intelligent Summary
Uses AI-based multimodal analysis to deeply interpret live content and automatically generate concise summaries and outline structures.
Smart Erasing
Accurately detects non-compliant audio and privacy-sensitive visuals such as faces and license plates, and erases them in real time.
Cloud AI Special Effects
Combines AI text-to-video capabilities to let users generate personalized video effects in real time by entering text prompts.
Product Advantages
From performance and technology to service and security, CSS demonstrates comprehensive capabilities to support and safeguard your business.
High Concurrency and Low Latency
Brings live streaming into the millisecond-latency era with strong resilience under poor network conditions, while delivering high concurrency, lower costs, instant playback, and ultra-HD viewing quality.
Cross-Platform Compatibility
Supports multiple integration methods including iOS, Android, and Flutter, enabling you to build and customize your own live room within minutes.
Professional Video Processing
Supports iOS, Android, and Flutter across platforms, and is compatible with major protocols such as RTMP, WebRTC, DASH, SRT, and QUIC for seamless integration.
Security and Anti-piracy
Reduces the risk of unauthorized restreaming through multiple encryption technologies, and provides professional DRM solutions for comprehensive video security protection.
Top Speed Codec for Lower-Bitrate HD Streaming
With a leading self-developed encoding engine, it delivers over 50% bitrate reduction while maintaining subjective image quality, helping lower bandwidth costs.
AI-Powered Capabilities
Integrated AI enables innovations such as audio and video enhancement, subtitles, multilingual translation, cloud-based web rendering, and AI effects.
Customer Trust
The trusted choice of globally recognized live streaming platforms and content companies, with leading customers across the industry already using Tencent Cloud CSS.
Frequently Asked Questions
Answers to common questions about using cloud live streaming, helping you get started quickly.
What is the difference between stream ingest, live streaming, and video on demand?
Stream ingest refers to sending a local video source to the cloud server. Live streaming is real-time media distribution that allows viewers to watch simultaneously. Video on demand (VOD) stores content for on-demand playback, so viewers can watch, pause, and fast-forward at any time. These three stages correspond to content production, real-time distribution, and storage/playback.
What are the character requirements for a domain name?
A domain name for CSS can contain up to 45 characters and does not support uppercase letters. The domain must complete ICP filing before it can be used with CSS. It is recommended to use separate subdomains for the ingest domain and the playback domain.
Must the ingest domain and playback domain be separated?
Yes. The ingest domain and playback domain must be configured separately and cannot share the same domain. This is required for security and stability, helps prevent unauthorized restreaming caused by exposed ingest URLs, and makes management and monitoring easier.
Which ingest protocols are supported?
CSS supports mainstream ingest protocols such as RTMP, SRT, and WebRTC. RTMP offers the best compatibility and fits most scenarios. SRT performs better under poor network conditions. WebRTC provides the lowest latency and is best suited for real-time interactive scenarios. You can choose the protocol that best matches your business needs.
How is live transcoding billed?
Live transcoding is billed based on transcoding duration, with pricing varying by resolution and codec format. Standard transcoding supports H.264, while Top Speed Codec transcoding can save more than 30% in bandwidth costs. For detailed billing rules, please refer to the CSS pricing page.
How can I enable live recording and playback?
CSS supports automatic recording and can store live streams in Video on Demand (VOD) in real time. After recording is completed, on-demand files are generated automatically and can be output in multiple formats such as MP4, HLS, and FLV for playback, editing, and secondary distribution.
How does CSS protect content security?
CSS provides multiple layers of security, including ingest authentication to prevent unauthorized streaming, playback authentication to prevent hotlinking and pirated rebroadcasting, live-stream encryption for content copyright protection, DRM, and AI-powered content moderation. Together, these capabilities protect your live content end to end.
Can a traffic package be used across multiple regions?
CSS traffic packages are region-specific and cannot be shared across regions. APAC 1, APAC 2, APAC 3, North America, and other regions each have independent traffic packages. Please purchase the package that matches the region where your primary users are located.
Cloud Streaming Services (CSS) Frequently Asked Questions (FAQ)
1 Product Basics FAQFrequently Asked QuestionsQ: What is Tencent Cloud Streaming Services?A: Tencent Cloud Streaming Services (CSS) is an all-in-one audio and video live streaming solution provided by Tencent Cloud. It covers the entire process of stream pushing, cloud processing, and playback, supporting multiple forms such as standard live streaming, ultra-low-latency live streaming, and cloud studio.Q: What is the latency of Tencent Cloud Streaming Services?A: End-to-end latency of ultra-low-latency live streaming is below 800ms, while standard live streaming latency is about 3–5 seconds. Ultra-low-latency live streaming is recommended for scenarios requiring real-time interaction.Q: Which protocols does Tencent Cloud Streaming Services support?A: Stream pushing supports the RTMP protocol; playback supports HTTP-FLV, HLS, WebRTC and other protocols, covering all terminals including PC, mobile and web.Q: How much does Tencent Cloud Streaming Services cost?A: Tencent Cloud Streaming Services supports two billing methods: traffic billing and peak bandwidth billing. Prices differ slightly between standard live streaming and ultra-low-latency live streaming. For specific pricing, please refer to the Billing Overview or use the [Price Calculator].
2 Technical Configuration FAQ
Q: How do I configure a live stream push URL?A: Log in to the Tencent Cloud CSS console, generate a stream push URL and stream key on the stream push configuration page, then enter the URL in OBS or other streaming software to start pushing streams.Q: What should I do if stream pushing fails?A: Common causes include: 1) Expired stream push URL; 2) Incorrect authentication parameters; 3) Network issues; 4) Incorrect streaming software configuration. We recommend checking stream push authentication settings, network connectivity, and viewing stream push logs in the console.Q: How to reduce live streaming latency?A: Methods to reduce latency include: 1) Using ultra-low-latency live streaming (WebRTC protocol); 2) Optimizing the network environment; 3) Selecting the nearest stream push node; 4) Adjusting player buffer parameters; 5) Disabling or reducing transcoding steps.Q: How to resolve choppy live streaming video?A: Common causes and solutions for choppy playback: 1) Insufficient push bandwidth → Reduce push bitrate or resolution; 2) Insufficient playback bandwidth → Use adaptive bitrate; 3) Network fluctuations → Switch networks or use multi-path streaming; 4) Excessive server pressure → Contact Tencent Cloud technical support.Q: How to configure hotlink protection for live streaming?A: Tencent Cloud CSS provides multiple hotlink protection methods: 1) Referer hotlink protection; 2) URL authentication; 3) IP blacklist and whitelist; 4) DRM digital copyright protection. They can be configured with one click on the Access Control page in the console.
3 Business Scenarios FAQ
Q: Which live streaming type is suitable for e-commerce live streaming?A: A combination of standard live streaming and ultra-low-latency live streaming is recommended for e-commerce live streaming. Standard live streaming serves most viewers, while ultra-low-latency live streaming is used for real-time interactive host co-streaming. Enabling the recording function for playback is also advised.Q: What features are required for online education live streaming?A: Recommended features for online education live streaming: 1) Ultra-low-latency live streaming for low-latency interaction; 2) Recording function for course playback; 3) DRM for copyright protection of teaching content; 4) Co-streaming function for teacher-student interaction; 5) Subtitle function for hearing-impaired students.Q: How much bandwidth is needed for sports event live streaming?A: Bandwidth for sports event live streaming depends on audience size and bitrate. For example, 1080p at 3Mbps bitrate for 1 million concurrent viewers requires approximately 3Tbps of bandwidth. Capacity planning in advance and use of live event bandwidth packages to reduce costs are recommended.Q: How to ensure security for corporate internal training live streaming?A: Security recommendations for corporate internal training live streaming: 1) Restrict access using URL authentication + IP whitelist; 2) Enable DRM encryption to prevent unauthorized recording; 3) Set playback passwords; 4) Use private deployment (if required); 5) Monitor live playback downloads.
4 Billing & Cost FAQ
Q: What is the difference between traffic billing and bandwidth billing for live streaming?A: Traffic billing charges based on actual data transmitted (GB), suitable for small-to-medium traffic. Bandwidth billing charges based on peak bandwidth (Mbps), suitable for sustained high-traffic scenarios. Billing methods can be switched in the console according to business characteristics.Q: Does Tencent Cloud Streaming Services offer free quotas?A: Tencent Cloud CSS provides various free quotas: 1) New users can claim trial resource packs; 2) The first 1,000 screenshots and moderation service calls are free monthly; 3) SDK License is given free with traffic pack purchases. For specific promotions, please follow the official website.Q: How are live streaming transcoding fees calculated?A: Live transcoding is billed by transcoding duration, with unit prices determined by output resolution (e.g., 480p, 720p, 1080p). Top-speed HD transcoding is slightly more expensive than standard transcoding but reduces bitrate by over 50%, resulting in lower overall costs.Q: How to reduce enterprise live streaming costs?A: Cost-reduction recommendations: 1) Select a reasonable bitrate to avoid over-provisioning; 2) Use top-speed HD transcoding to save bandwidth; 3) Purchase traffic packs for discounts; 4) Switch billing methods based on traffic fluctuations; 5) Utilize free quotas.
5 Advanced Features FAQ
Q: What scenarios is the Cloud Studio suitable for?A: Cloud Studio is suitable for scenarios requiring multi-view switching and mixed-stream output, such as: 1) Product switching in e-commerce live streaming; 2) Multi-camera setup for online education; 3) Guest connections for sports commentary; 4) Live directing for large-scale events.Q: How to implement live co-streaming?A: Tencent Cloud provides an RTC co-streaming solution. Hosts and viewers achieve real-time audio and video interaction via the Tencent Cloud TRTC SDK. RTC service must be activated in the console and the co-streaming SDK integrated on the client side.Q: How to use AI subtitles for live streaming?A: AI subtitles are a value-added feature of Tencent Cloud CSS and require enabling the subtitle service in the console. It supports real-time speech-to-text subtitles, multilingual translation, and other functions, making it ideal for international live streaming scenarios.Q: How to monitor live streaming quality?A: The Tencent Cloud CSS console provides real-time monitoring, allowing you to view: 1) Stream push quality (bitrate, frame rate, packet loss rate); 2) Playback quality (first-frame time, stutter rate); 3) Concurrent connections and peak bandwidth; 4) Abnormal alerts.
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