tencent cloud

If you follow the steps in Best Practice > CSS Push but fail to publish streams, check the common reasons for publishing failure listed in this document to troubleshoot the issue.

1. Check whether you have configured for your domain name a CNAME record that points to a Tencent Cloud address

Publishing can succeed only if your domain name has a CNAME record that points to a Tencent Cloud address. You can check whether a publishing domain name created has a CNAME record in the CNAME column in Domain Management.

If your domain name does not have a CNAME record, you can add one for it by following the steps in Configuring CNAME for Domain Name.

2. Check whether the network is normal

RTMP publishing uses the 1935 port by default. If the port is not open in the firewall of the network you use for testing, you will be unable to connect to the server. You can check whether this is what caused your publishing failure by switching to another network, for example, 4G.

3. Check whether the validity period of the publishing URL is too short.

Some clients may be too cautious about txTime. For example, they may set txTime to 5 minutes from the current time to prevent traffic theft. This is unnecessary given the presence of the txSercet signature. If the validity period is too short, if a host is disconnected during a live stream, he or she may be unable to resume publishing due to the expiration of the publishing URL.
You are advised to set txTime to 12 or 24 hours from the current time, longer than an average live streaming session.

4. Check if txSecret is correct

To ensure security, Tencent Cloud requires configuring hotlink protection for all push URLs and rejects all hotlink protection URLs that have expired or are miscalculated. If a push is rejected, the LVB SDK will throw a PUSH_WARNING_SERVER_DISCONNECT event.
See Best Practice > CSS Push for how to get reliable publishing URLs.

5. Check whether the publishing URL is in use

A publishing URL can be used by only one client at a time. A second client trying to publish using the URL will be rejected by Tencent Cloud. You can log in to the CSS console and check whether a stream is already being published in Stream Management > Live Streams. You can also check whether a stream is disabled in Disabled Streams.

6. Why does a -2 error occurs when I call startPush in V2TXLivePusher to publish streams?

A -2 error may occur in the following cases:

• Using V2TXLivePusher to publish trtc:// streams in LiteAVSDK_Smart. Only LiteAV_All and LiteAV_Enterprise support the TRTC protocol. LiteAVSDK_Smart does not.
• A required parameter is missing from the URL passed in to startPush. For how to splice publishing URLs, please see Publishing/Playback URL.
• The V2TXLiveMode_RTC mode is selected during initialization of the player, but an rtmp:// URL is passed in.