This article mainly explains the rules for assembling live streaming URLs. If you want to quickly generate push and playback addresses, you can go to the console to generate them. For more information, please refer to the documentation on the Address Generator.
After you create a transcoding template and bind it with a playback domain name, you need to add the transcoding template name after the StreamName of the live stream with the transcoding configuration in the format of StreamName_transcoding template name. For details, see Playback Configuration.
Prerequisites
You have signed up for a Tencent Cloud account and activated the CSS service.
You have added push/playback domain names in Domain Management of the CSS console and successfully configured the CNAME record. For detailed directions, please see Adding Domain Names.
Splicing Push URLs
If you run a large number of live streaming rooms, it is impossible to manually generate a push and playback URL for each host. In such cases, you can use the server to automatically splice the addresses. Any URL that meets Tencent Cloud standards can be used for push. A standard push URL consists of four parts, as shown below:
Push Domain: You can use the default push domain provided by Tencent Cloud Live Streaming, or you can use your own push domain that has been filed and successfully configured with CNAME.
AppName
The name of the live streaming application, which is "live" by default and can be customized.
StreamName（Stream ID）
Custom Stream Name: A unique identifier for each live stream, recommended to use random numbers or a combination of numbers and letters.
Authentication Key (optional)
The URL includes two parts: txSecret and txTime, where txSecret=Md5(key+StreamName+hex(time))&txTime=hex(time).
After enabling push authentication, you need to use a URL containing the authentication key for pushing. If push authentication is not enabled, there is no need for "?" and its subsequent content in the push address.
txTime（URL Expiration）
Indicates when the URL will expire, and the format supports hexadecimal UNIX timestamps (Time Unit: Seconds).
Note:
For example, 5867D600 represents the expiration at 0:00:00 on January 1, 2017. Our customers usually set txTime to expire 24 hours after the current time. The expiration time should not be too short or too long. When the broadcaster encounters a network interruption during the live streaming process, they will resume pushing the stream. If the expiration time is too short, the broadcaster will not be able to resume pushing the stream due to the expiration of the push URL.
Indicates when the URL will expire, and the format supports hexadecimal UNIX timestamps.
Splicing Playback URLs
A playback URL consists of a playback protocol prefix, domain name (domain), application name (AppName), stream name (StreamName), playback protocol suffix, authentication key, and other custom parameters. Below are a few examples.
We recommend WebRTC most as it has the best instant streaming performance and supports ultra-high concurrency.
HTTP-FLV
http:// or https://
We recommend HTTP-FLV as it has good instant streaming performance and supports high concurrency.
RTMP
rtmp://
We do not recommend RTMP as it has poor instant streaming performance and does not support high concurrency.
HLS (M3U8)
http:// or https://
We recommend HLS for mobile clients and for the Safari browser on macOS.
domain
Push Domain: You can use the default push domain provided by Tencent Cloud Live Streaming, or you can use your own push domain that has been filed and successfully configured with CNAME.
AppName
The name of the live streaming application, utilized for differentiating the storage path of live streaming media files, which is "live" by default and can be customized.
StreamName（Stream ID）
Custom Stream Name: A unique identifier for each live stream. It is recommended to use random numbers or a combination of numbers and letters. It is not recommended to include "_". If the string after "_" is the same as the transcoding template name, the string will be recognized as the transcoding template name, and the string before "_" will be recognized as StreamName, which may cause playback anomalies. For example: test_a1_hd1, test_a1 will be recognized as StreamName, and "hd1" will be recognized as the transcoding template name.
Transcoding Template Name
By appending a "_" suffix to the StreamName, the program will pull the transcoding stream according to this transcoding template.
Authentication Key (optional)
The URL includes two parts: txSecret and txTime, where
After enabling push authentication, you need to use a URL containing the authentication key for pushing. If push authentication is not enabled, there is no need for "?" and its subsequent content in the push address.
txTime（URL Expiration）
Indicates when the URL will expire, and the format supports hexadecimal UNIX timestamps(Time Unit: Seconds).
Note:
For example, 5867D600 represents the expiration at 0:00:00 on January 1, 2017. Our customers usually set txTime to expire 24 hours after the current time. The expiration time should not be too short or too long. When the broadcaster encounters a network interruption during the live streaming process, they will resume pushing the stream. If the expiration time is too short, the broadcaster will not be able to resume pushing the stream due to the expiration of the push URL.
Go to Domain Management of the CSS console, select a pre-configured push domain name, and click Manage > Push Configuration to display the Push Address Sample Code (for both PHP 、Java) that demonstrates how to generate a hotlink protection address. For detailed directions, please see Push Configuration.
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