Help Center/ Live/ Service Overview/ Constraints/ Cloud Live
Updated on 2026-01-23 GMT+08:00
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Cloud Live

Before using Cloud Live, understand the following constraints.

Constraints

Table 1 Constraints

Item

Description

Concurrent livestreams

There is no restriction on concurrent livestreams. If you require a bandwidth exceeding 100 Gbit/s, you are advised to submit a service ticket for further consultation.

Stream push

There is no limit on the bitrate. Common resolutions and bitrates are supported. To ensure smooth streaming, a bitrate no greater than 4 Mbit/s is recommended.

Playback

You can play a livestream only after the ingest and streaming domain names are associated. The values of AppName and StreamName in the streaming URL must be the same as those in the ingest URL.

Input/Output format

Cloud Stream Live

  • Video packaging protocols
    • RTMP and FLV

      Video codec: H.264 and H.265, etc.

    • HLS output protocol

      Video codec: H.264 and H.265, etc.

  • Audio packaging protocols
    • RTMP and FLV

      Audio codec: AAC, etc.

    • HLS output protocol

      Audio codec: AAC

Low Latency Live (LLL)

  • Transmission protocol requirements
    • Signaling transmission protocol: HTTPS, HTTP, and UDP are supported. HTTP listening port 80 is enabled. HTTP and UDP are insecure.
    • Media transmission protocol: UDP and TCP are supported. Media streams can be encrypted. It is recommended that DTLS be used for signaling negotiation, as UDP is insecure.
  • Encoding format requirements
    • Audience: The supported video encoding format is H.264 without B frames, and the supported audio encoding format is OPUS.
    • Streamer: The supported video encoding format is H.264 without B frames, and the supported audio encoding format is AAC (LC/HE).
NOTE:
  • If the format of the streaming device is not supported, you need to create a transcoding template. LLL supports real-time transcoding, and you will be billed for using this function. The conversion from AAC to OPUS is supported and no fee will be generated.
  • To reduce latency, you can set the GOP at the streaming device to 2s.

Streaming management

This function is available only in CN North-Beijing4, AP-Singapore, and EU-Dublin.

API Constraints

Live sets a limit on the number of API calls to prevent service interruption caused by repeated API calls in a short period of time.

Table 2 API request throttling

API Category

API Name

Max. User Requests

Max. API Requests

Domain name management
  • Creating a domain name
  • Querying domain names

300 times/minute

3,000 times/minute
  • Deleting a domain name
  • Modifying a domain name
  • Mapping domain names
  • Deleting a domain name mapping
  • Configuring the domain name IPv6 switch
  • Modifying the HLS configuration of a domain name
  • Querying HLS configurations of domain names

100 times/minute

1,000 times/minute
  • Modifying the streaming domain name delay
  • Modifying origin pull settings

30 times/minute

100 times/minute
  • Querying the streaming domain name delay
  • Querying origin pull settings

30 times/minute

300 times/minute

Transcoding template management
  • Creating a transcoding template
  • Deleting a transcoding template
  • Modifying a transcoding template
  • Querying transcoding templates

100 times/minute

1,000 times/minute

Stream management
  • Disabling stream push
  • Modifying the attribute of a disabled stream

4,000 times/minute

12,000 times/minute
  • Querying disabled streams
  • Resuming stream push

3,000 times/minute

6,000 times/minute

Pausing stream push

300 times/minute

3,000 times/minute

Notification management
  • Adding and modifying stream notification configurations
  • Querying stream notification configurations
  • Deleting stream notification configurations

300 times/minute

3,000 times/minute

Authentication
  • Configuring a referer validation ACL
  • Deleting a referer validation ACL
  • Querying referer validation ACLs
  • Querying IP ACLs
  • Modifying an IP ACL
  • Generating a signed URL

300 times/minute

3,000 times/minute

Querying supported areas of a streaming domain name

30 times/minute

300 times/minute

Modifying supported areas of a streaming domain name

30 times/minute

100 times/minute
  • Querying the URL validation configuration of a specified domain name
  • Modifying the URL validation configuration of a specified domain name
  • Deleting the URL validation configuration of a specified domain name

150 times/minute

300 times/minute

Log management

Obtaining livestreaming logs

300 times/minute

3,000 times/minute

HTTPS certificate management

Querying HTTPS certificate information

300 times/minute

3,000 times/minute
  • Modifying the HTTPS certificate configuration of a specified domain name
  • Querying the HTTPS certificate configuration of a specified domain name
  • Deleting the HTTPS certificate configuration of a specified domain name

150 times/minute

300 times/minute

OBS bucket management

Granting or canceling authorization of accessing OBS buckets

150 times/minute

300 times/minute

Livestreaming watermark management

Creating a watermark template

Modifying a watermark template

Deleting a watermark template

Creating a watermark rule

Modifying a watermark rule

Deleting a watermark rule

Querying watermark rule configurations

50 times/minute

200 times/minute

Querying watermark templates

Querying watermark template configurations

Querying watermark rules

300 times/minute

3,000 times/minute

Statistical analysis

Querying the peak bandwidth

20 times/second

200 times/second

Querying the total playback traffic

20 times/second

300 times/second

Querying HTTP status codes

30 times/second

300 times/second

Querying the duration of transcoded outputs

20 times/second

200 times/second

Querying upstream bandwidth

20 times/second

300 times/second

Querying the number of streams by domain name

20 times/second

300 times/second

Querying historical streams

30 times/second

300 times/second

Querying playback profiles

10 times/second

100 times/second

Querying the distribution of livestreaming metrics by region

50 times/second

150 times/second

Stream analytics

Querying the stream frame rate

10 times/second

200 times/second

Querying the stream bitrate

10 times/second

200 times/second

Querying stream analytics data

10 times/second

200 times/second

Querying CDN upstream quality data

30 times/second

300 times/second

Querying ongoing streams

20 times/second

60 times/second
Parent topic: Constraints