我收到以下错误：
02-10 13:19:21.607: E/MediaPlayer(12662): error (-4, -4)
02-10 13:19:21.622: I/MediaPlayer(12662): Info (1,26)
02-10 13:19:21.622: E/MediaPlayer(12662): Error (-4,-4)
02-10 13:19:21.622: D/VideoView(12662): Error: -4,-4
02-10 13:19:21.622: I/System.out(12662): onError-error play video
当我向VideoView添加RelativeLayout并启动它时。之后我从onErrorListener收到消息。有谁知道这意味着什么？