There is no sound in the mobile video.

1, the video format is wrong, and the phone can't decode the audio (you can check which video formats are supported by the phone model).

2, mobile phone application software problems, some software does not support the corresponding video format, Baidu asked which video playback software this model of mobile phone supports, and then installed the corresponding player to play normally.

3, player or system media volume settings, some players will automatically mute to keep playing smoothly.