On the Web platform, "playQualityUpdate" has audio bitrate, but after successful stream playing, there is video but no sound. What is the reason?

Video Call

Voice Call

Please check if the "video" tag object corresponding to the stream playing has the "muted" mute attribute set.

When mixed stream is enabled with sound level feature, using "flv.js" to pull and play streams results in black screen on some browsers?

What is the reason for file transcoding loading failure with error code 60018?