tencent cloud

Cloud Streaming Services

Release Notes and Announcements
Announcements
User Guide
Product Introduction
Overview
CSS Products
Concepts
Features
Use Cases
Strengths
Use Limits
Purchase Guide
Billing Overview
Basic Service Fee
Value-Added Service Fee
Prepaid plan
Purchase Process
Changing Billing Modes
Refund Policy
Viewing Bills
Renewal
Processing for Overdue Payments
Billing FAQs
Live Video Broadcasting (LVB)
Overview
Use Cases
Getting Started
SDK Integration
Live Event Broadcasting (LEB)
Overview
LEB Versus LVB
Use Cases
Getting Started
SDK Integration
Live Video Caster
Overview
Application Scenarios
Feature Area Introduction
Managing Live Video Caster
General Cloud Director
Configuring Program Lists and Automated Broadcasting
Console Guide
Console Overview
Overview
Domain Management
Stream Management
Package Management
AI Features
Feature Configuration
Relay
Billing Usage Statistics
Monitoring
Toolkit
OOTB live
CAM-Based Access Control
Feature Guide
Push and Playback
Features
Practices in Typical Scenarios
Cloud Native Recording
Live Streaming Security
Global CSS Service
Callback Notifications
User Guides for Common Third-Party Tools
SDK Guide
0. SDK Integration Guide
1. Stream Push
2. Playback
3. Advanced Features
API Documentation
History
Introduction
API Category
Making API Requests
Live Pad APIs
Live Stream Mix APIs
Time Shifting APIs
Monitoring Data Query APIs
Billing Data Query APIs
Live Transcoding APIs
Delayed Playback Management APIs
Domain Name Management APIs
Watermark Management APIs
Certificate Management APIs
Stream Pulling APIs
Recording Management APIs
Live Callback APIs
Screencapturing and Porn Detection APIs
Authentication Management APIs
Live Stream Management APIs
Data Types
Error Codes
Ops Guide
Video Stuttering
Troubleshooting Push Failure
Troubleshooting Playback Failure
CLS Assists in Live Stream Troubleshooting
Troubleshooting High Latency
Troubleshooting Poor Quality of Pulled Video
Authorizing CSS to Store Screenshots in a COS Bucket
Troubleshooting
Live Stream Mixing Error `InvalidParameter.OtherError`
About Pushing
Generating Push URLs
PC Push
Playing Method
Web Player
Live Streaming Quiz
FAQs
Service Region
Live Streaming Basics
Push and Playback
CSS Billing
Global CSS Service
Live Recording
On-Cloud Stream Mix
Domain Configuration
Related to Live Video Caster
Compatibility with Apple ATS
Difference Between Stream Interruption and Stream Suspension
SLA
CSS Service Level Agreement
CSS Policy
Privacy Policy
Data Processing And Security Agreement
Glossary
DocumentationCloud Streaming ServicesPurchase GuideValue-Added Service FeeLive Quality Control and Live Assessment

Live Quality Control and Live Assessment

PDF
Focus Mode
Font Size
Last updated: 2025-09-11 09:59:09

Overview

CSS offers Live Quality Control and Live Assessment capabilities, enabling you to comprehensively identify quality issues within live streams and evaluate performance scores during live broadcasts, while providing corresponding recommendations.

Live Quality Control

Provides capabilities for Format Diagnosis and Content Quality Inspection:
Capability
Description
Format Diagnosis
A cloud-based audio and video processing service designed for real-time diagnostics of live streams, capable of analyzing issues such as stream information anomalies, timestamp irregularities, stream status abnormalities, container encapsulation errors, and decoding failures.
Content Quality Inspection
Common Image Issue
Supports the detection of various live streaming quality issues, including mosaic artifacts, crash screens, image blurring, screen jitter, and visual noise.
Recognition Code Detection
Supports detection capabilities for QR codes, barcodes, applet codes, and other identification codes.
Solid Color Screen and Brightness Detection
Supports the detection of scenarios in live streaming such as black/white edges, solid color screens, low light conditions, and overexposure.
Common Sound Issue
Supports various live audio quality detection features, including Silence, Low Voice, and High Voice.

Live Assessment

Includes Scoring Without Reference and Scoring With Reference:
Scoring Without Reference：The algorithm objectively evaluates the quality of live streams without relying on comparative references, directly providing assessment scores.
Scoring With Reference：Typically, the transcoded stream is evaluated and scored by comparing it against the original stream or the watermark stream. The capabilities are outlined in the table below:
Capability
Description
PSNR
Peak Signal-to-Noise Ratio: Perform scoring with reference on the transcoding stream quality by calculating the mean square error between the original/watermark stream and the transcoding stream to measure the compression or repair quality of the live streaming image.
SSIM
Structural Similarity Index: Perform scoring with reference on the transcoding stream quality by comparing brightness, contrast, and structural information between the transcoding stream and the original/watermark stream and simulating human visual system perception of image quality.
VMAF
Video Multimethod Assessment Fusion: Perform objective scoring with reference on the transcoding stream quality based on multiple basic metrics and machine learning models.

Must-Knows

If the Original stream, Watermarked stream, and Transcoded stream are simultaneously configured as detection content within the Live Quality Control and Live Assessment Template, Live Quality Control and Scoring Without Reference will initiate Quality Control and Assessment tasks for the Original stream, Watermarked stream (if applicable), and Transcoded stream. Scoring With Reference, however, will only initiate Assessment tasks for the Transcoded stream.
Live Quality Control and Live Assessment are both triggered by stream pushing.
The minimum task unit for Quality Control and Assessment is one minute. Tasks shorter than one minute will be billed as one minute.

Pricing

Billable Item
Function Type
Price (USD/Min)
Resolution(
2K and below
)
Resolution(
More than 2K
)
Duration of Live Quality Control
Quality Control
Format Diagnosis
Format Diagnosis
Format Diagnosis
0.008
0.027
Content Quality Inspection
Common Image Issue
Mosaic detection
0.008
0.027
Crash screen detection
0.008
0.027
Blur detection
0.008
0.027
Video jitter detection
0.008
0.027
Video noise detection
0.008
0.027
Recognition Code Detection
QR code/Barcode detection/Applet code detection
0.008
0.027
Solid Color Screen and Brightness Detection
Black/White edge detection
0.008
0.027
Solid color screen detection
0.008
0.027
Low light/Overexposure detection
0.008
0.027
Common Sound Issue
Silence/Low voice/High voice detection
0.008

Evaluation

Scoring Without Reference
Scoring Without Reference
Scoring Without Reference
0.016
0.11
Scoring With Reference
PSNR/SSIM
PSNR/SSIM
0.016
0.11
VMAF
VMAF
0.016
0.11

Billing details

Billable item: Duration of Live Quality Control
Billing mode: Pay-as-you-go
Billing cycle: Daily billing. Hourly billing. Billing is issued and fees are deducted hourly. Detailed billing and billing time are subject to the actual billing invoice.

Billing examples

If you utilize the Quality Control and Assessment services on June 1, 2025, with the detection content configured in the template as Original Stream and Transcoded Stream (single transcoding template), both live stream resolutions set to 1080P, and enable Quality Control capabilities including Format Diagnosis, Crash Screen Detection, QR Code Detection, Barcode Detection, Silence Detection, High Voice Detection, as well as Evaluation capabilities such as PSNR and SSIM, for a total live streaming duration of 1 hour with continuous detection enabled throughout, the billing amount will be:
Quality Control Fees:
Format diagnosis fees = 0.008(USD/minute) × 60(minutes) (Original stream) + 0.008(USD/minute) × 60(minutes) (Transcoded stream) = 0.96USD
Crash screen detection fees = 0.008(USD/minute) × 60(minutes) (Original stream) + 0.008(USD/minute) × 60(minutes) (Transcoded stream) = 0.96USD
Recognition code detection fees(including QR code and Barcode detection) = 0.008(USD/minute) × 60( minutes) (Original stream) + 0.008 (USD/minute) × 60( minutes) (Transcoded stream) = 0.96USD
Common sound issue fees (including silence and high voice detection) = 0.008(USD/minute) × 60(minutes) (Original stream) + 0.008(USD/minute) × 60(minutes) (Transcoded stream) = 0.96USD
Evaluation fees ：Scoring With Reference fees(including PSNR and SSIM) = 0.016(USD/minute) × 60(minutes) (Transcoded stream)= 0.96USD

Previous Topic: Live Stream PackageNext Topic: Prepaid plan

Help and Support

Was this page helpful?

Help us improve! Rate your documentation experience in 5 mins.

Feedback