RTMP ingest URL format and signature - Object Storage Service - Alibaba Cloud - Object Storage Service

Important

You must sign an ingest URL only when the bucket access control list (ACL) is not public-read-write. The signing method is similar to that for OSS URLs.

RTMP ingest URL

The RTMP ingest URL is in the format rtmp://${bucket}.${host}/live/${channel}?${params}. Example: rtmp://examplebucket.oss-cn-hangzhou.aliyuncs.com/live/test-channel.

bucket: The bucket name. Example: examplebucket. For more information about bucket naming conventions, see Bucket.
host: The endpoint of the region. Example: oss-cn-hangzhou.aliyuncs.com. For more information about endpoints, see Regions and endpoints.
live: The application name for the RTMP protocol. In OSS, this value is fixed to live.
channel: The channel name. Example: test-channel. For more information about channel naming conventions, see PutLiveChannel.
params: The stream ingest parameters. The format is the same as that of a query string in an HTTP request. Example: varA=valueA&varB=valueB.

RTMP ingest URL parameters

The following table describes the parameters in RTMP ingest URLs.

Name	Description
playlistName	Specifies the name of the generated M3U8 file. Note The `${channel_name}/` prefix is added to the name of the generated M3U8 file.

Signature method of RTMP ingest URLs

A signed ingest URL is in the format rtmp://${bucket}.${host}/live/${channel}?OSSAccessKeyId=xxx&Expires=yyy&Signature=zzz&${params}.

The following table describes the parameters in signed RTMP ingest URLs.

Parameter Name	Description
OSSAccessKeyId	The same as the AccessKeyId for signing OSS HTTP requests.
Expires	The UNIX timestamp, in seconds.
Signature	The signature string.
params	Other parameters. All parameters must be signed.

The signature is calculated using the following method:

base64(hmac-sha1(AccessKeySecret,
    + Expires + "\n"
    + CanonicalizedParams
    + CanonicalizedResource))

The following table describes the parameters involved in signature calculation.

Name	Description
CanonicalizedParams	All parameters concatenated in lexicographic order of the parameter keys. The format is `key:value\n`. Note If no parameters exist, this item is empty. The parameters do not include SecurityToken, OSSAccessKeyId, Expires, or Signature. Each parameter key can appear only once.
CanonicalizedResource	The format is `/BucketName/ChannelName`. Example: `/examplebucket/test-channel`.