After version 4.0.95, webrtc streaming fails.

[duiniuluantanqin]

Description'

Please ensure that the markdown structure is maintained.

Please describe the issue you encountered here.
'
Make sure to maintain the markdown structure.

When there is no stream published, the webrtc play operation will immediately return an error. The error log is as follows.

1. SRS version: 4.0.95
2. The log of SRS is as follows:

add player : no play relations

1. The configuration of SRS is as follows:

rtc.conf

Replay

How to replay bug?

Steps to reproduce the bug

How to replay bug?

1. Start SRS.
2. Pull the stream through WebRTC.

Expected Behavior

> Please describe your expectation

> When webrtc play occurs, do not immediately end this request even if there is no publish. This way, when there is a publish, the video can be played without having to request again.

TRANS_BY_GPT3

[winlinvip]

Fixed 4.0.117