My network camera does not have audio. Then I used the following command to push the camera's rtsp stream to the srs server. The configuration file used is SRS-HTTP-FLV Deployment Example.

• ffmpeg -i rtsp://** -vcodec libx264 -acodec aac -f flv rtmp://192.168.31.221/live/livestream

Afterwards, I used the following command on ffmpeg to pull the http-flv stream into the srs.flv file.

• ffmpeg.exe -i http://192.168.31.221:8080/live/livestream.flv -vcodec copy -acodec copy -f flv srs.flv
  Then I used FlvParse to examine the structure of srs.flv, and it showed has audio=0, indicating that there was no Audio Tag, which is consistent with the actual situation. However, on the other hand, when I directly input the link http://192.168.31.221:8080/live/livestream.flv into the browser, the downloaded file showed has audio=1, but still no Audio Tag. What could be the reason for this?

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