Before you can upload audio and video data by using the Real-Time Messaging Protocol (RTMP), you must call the PutLiveChannel operation to create a LiveChannel. The response to the PutLiveChannel request includes the URL that is used to ingest streams to the LiveChannel and the URL that is used to play the ingested streams.

Note You can use the returned URLs to ingest and play streams. You can also perform operations based on the returned LiveChannel name, such as querying stream ingesting status, querying stream ingesting records, and disabling stream ingesting.

Request syntax

PUT /ChannelName?live HTTP/1.1
Host: BucketName.oss-cn-hangzhou.aliyuncs.com
Date: GMT date
Content-Length: Size
Authorization: SignatureValue
<?xml version="1.0" encoding="UTF-8"?>
<LiveChannelConfiguration>
  <Description>ChannelDescription</Description>
  <Status>ChannelStatus</Status>
  <Target>
     <Type>HLS</Type>
     <FragDuration>FragDuration</FragDuration>
     <FragCount>FragCount</FragCount>
     <PlaylistName>PlaylistName</PlaylistName>
  </Target>
  <Snapshot>
    <RoleName>Snapshot ram role</RoleName>
    <DestBucket>Snapshot dest bucket</DestBucket>
    <NotifyTopic>Notify topic of MNS</NotifyTopic>
    <Interval>Snapshot interval in second</Interval>
  </Snapshot>
</LiveChannelConfiguration>

Request headers

Header Type Required Description
ChannelName String Yes The name of the LiveChannel that you want to create. The name must comply with the naming conventions for objects and cannot contain forward slashes (/).

Request parameters

Parameter Type Required Description
LiveChannelConfiguration Container Yes The container that stores the configurations of the LiveChannel.

Child nodes: Description, Status, and Target

Parent nodes: none
Description String No The description of the LiveChannel. The description can be up to 128 bytes in length.

Child nodes: none

Parent nodes: LiveChannelConfiguration
Status Enumerated string No The status of the LiveChannel.

Child nodes: none

Parent nodes: LiveChannelConfiguration

Valid values: enabled and disabled

Default value: enabled
Target Container Yes The container that stores the configurations used by the LiveChannel to store uploaded data.

Child nodes: Type, FragDuration, FragCount, and PlaylistName

Parent nodes: LiveChannelConfiguration
Type Enumerated string Yes The format in which the LiveChannel stores uploaded data.

Child nodes: none

Parent nodes: Target

Valid value: HLS

Note
  • When you set the value of Type to HLS, Object Storage Service (OSS) updates the m3u8 file each time when a ts file is generated. The maximum number of the latest ts files that can be included in the m3u8 file is specified by the FragCount parameter.
  • When you set the value of Type to HLS and the duration of the audio and video data written to the current ts file exceeds the duration specified by FragDuration, OSS switches to the next ts file to write data before the next key frame is received. If OSS does not receive the next key frame after max(2*FragDuration, 60s), OSS forcibly switches to the next ts file. In this case, stuttering may occur during the playback of the stream.
FragDuration String No The duration of each ts file when you set the value of Type to HLS.

Unit: seconds

Child nodes: none

Parent nodes: Target

Valid values: [1, 100]

Default value: 5

Note If you do not specify values for the FragDuration and FragCount parameters, the default values of the two parameters are used. You must specify the FragDuration and FragCount parameters at the same time.
FragCount String No The number of ts files included in the m3u8 file when the value of Type is HLS.

Child nodes: none

Parent nodes: Target

Valid values: [1, 100]

Default value: 3

Note If you do not specify values for the FragDuration and FragCount parameters, the default values of the two parameters are used. You must specify the FragDuration and FragCount parameters at the same time.
PlaylistName String No The name of the generated m3u8 file when the value of Type is HLS. The name must be 6 to 128 bytes in length. The name must end with .m3u8.

Child nodes: none

Parent nodes: Target

Default value: playlist.m3u8
Snapshot Container No The container that stores the options of the high-frequency snapshot operations.

Child nodes: RoleName, DestBucket, NotifyTopic, and Interval

Parent nodes: LiveChannelConfiguration
RoleName String No The name of the role used to perform high-frequency snapshot operations. The role must have the write permissions on DestBucket and the permissions to send messages to NotifyTopic.

Child nodes: none

Parent nodes: Snapshot
DestBucket String No The bucket that stores the results of high-frequency snapshot operations. The bucket must belong to the same owner as the current bucket.

Child nodes: none

Parent nodes: Snapshot
NotifyTopic String No The MNS topic used to notify users of the results of high-frequency snapshot operations.

Child nodes: none

Parent nodes: Snapshot
Interval NUMERIC Yes The interval of high-frequency snapshot operations. If no key frame, such as an inline frame, exists within the interval, no snapshot is captured.

Unit: seconds

Child nodes: none

Parent nodes: Snapshot

Valid values: [1, 100]

By default, this parameter is left empty.

Response parameters

Parameter Type Description
CreateLiveChannelResult Container The container that stores the response to the CreateLiveChannel request.

Child nodes: PublishUrls and PlayUrls

Parent nodes: none
PublishUrls Container The container that stores the URL used to ingest streams to the LiveChannel.

Child nodes: Url

Parent nodes: CreateLiveChannelResult
Url String The URL used to ingest streams to the LiveChannel.

Child nodes: none

Parent nodes: PublishUrls

Note
  • The URL used to ingest streams is not signed. If the access control list (ACL) of the bucket is not public read/write, you must add a signature to the URL before you use the URL to access the bucket.
  • The URL used to play streams is not signed. If the ACL of the bucket is private, you must add a signature to the URL before you use the URL to access the bucket.
PlayUrls Container The container that stores the URL used to play the streams ingested to the LiveChannel.

Child nodes: Url

Parent nodes: CreateLiveChannelResult
Url String The URL used to play the streams ingested to the LiveChannel.

Child nodes: none

Parent nodes: PlayUrls

Examples

Sample requests 
PUT /test-channel?live HTTP/1.1
Date: Wed, 24 Aug 2016 11:11:28 GMT
Content-Length: 333
Host: test-bucket.oss-cn-hangzhou.aliyuncs.com
Authorization: OSS YJjHKOKWDWINLKXv:hvwOZJRh8toAj3DZvtsuPgf+a****
<?xml version="1.0" encoding="utf-8"?>
<LiveChannelConfiguration>
    <Description/>
    <Status>enabled</Status>
    <Target>
        <Type>HLS</Type>
        <FragDuration>2</FragDuration>
        <FragCount>3</FragCount>
    </Target>
    <Snapshot>
        <RoleName>role_for_snapshot</RoleName>
        <DestBucket>snapshotdest</DestBucket>
        <NotifyTopic>snapshotnotify</NotifyTopic>
        <Interval>1</Interval>
     </Snapshot>
</LiveChannelConfiguration>
Sample responses 
HTTP/1.1 200
content-length: 259
server: AliyunOSS
x-oss-server-time: 4
connection: close
x-oss-request-id: 57BD8419B92475920B0002F1
date: Wed, 24 Aug 2016 11:11:28 GMT
x-oss-bucket-storage-type: standard
content-type: application/xml
<?xml version="1.0" encoding="UTF-8"?>
<CreateLiveChannelResult>
  <PublishUrls>
    <Url>rtmp://test-bucket.oss-cn-hangzhou.aliyuncs.com/live/test-channel</Url>
  </PublishUrls>
  <PlayUrls>
    <Url>http://test-bucket.oss-cn-hangzhou.aliyuncs.com/test-channel/playlist.m3u8</Url>
  </PlayUrls>
</CreateLiveChannelResult>