setVolume method
Sets the audio volume
volume
indicates a value between 0.0 (silent) and 1.0 (full volume) on a
linear scale.
Implementation
Future<void> setVolume(double volume) async {
assert(volume >= 0.0 && volume <= 1.0); // validate the param
_volumeBeforeMute = _videoPlayerController!.value.volume;
await _videoPlayerController?.setVolume(volume);
}