-keepparameternames
-keepattributes Exceptions,InnerClasses,Signature,Deprecated,EnclosingMethod
-keep class tv.danmaku.ijk.media.widget.media.IjkVideoView {
    public protected *;
}
-keep class tv.danmaku.ijk.media.widget.media.IMediaController {
    public protected *;
}
-keep class tv.danmaku.ijk.media.player.** {
  *;
}