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.
Recording	This function is unavailable in AP-Bangkok.
Transcoding	In the AP-Bangkok region, submit a service ticket for review after configuring a template. The configuration takes effect only after it is approved.
Snapshot capturing
Stream status notifications

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
Domain name management	Querying IP address information	5 times/second	5 times/second
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
Snapshot management	Creating a snapshot capturing template Modifying a snapshot capturing template Querying snapshot capturing templates Deleting a snapshot capturing template	150 times/minute	300 times/minute
Log management	Obtaining livestreaming logs	300 times/minute	3,000 times/minute
Recording management	Creating a recording template Querying recording templates Modifying a recording template Deleting a recording template Querying recording template configurations Submitting a recording command	300 times/minute	3,000 times/minute
Recording management	Creating a video recording index	1,200 times/minute	3,000 times/minute
Recording callback management	Creating a recording callback Querying recording callbacks Modifying a recording callback Querying a recording callback Deleting a recording callback	300 times/minute	300 times/minute
HTTPS certificate management	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
Livestreaming watermark management	Querying watermark templates Querying watermark template configurations Querying watermark rules	300 times/minute	3,000 times/minute
Statistical analysis	Querying bandwidth utilization	100 times/second	600 times/second
	Querying traffic utilization	20 times/second	200 times/second
	Querying the number of viewers	20 times/second	200 times/second
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
Statistical analysis	Querying the duration of recorded outputs	20 times/second	200 times/second
	Querying the number of snapshots	20 times/second	200 times/second
	Querying stream data of a streaming domain name	20 times/second	50 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