undefined errors on rtsp2rtmp

[liventang]

Hi, there are errors while running, could you show me how to fix it up?
demos\demo.go:30:73: undefined: rtsp2rtmp.FlvChunk
demos\demo.go:32:13: undefined: rtsp2rtmp.FlvChunk
demos\demo.go:63:20: undefined: rtsp2rtmp.VIDEO_TAG
demos\demo.go:73:21: undefined: rtsp2rtmp.VIDEO_TAG
demos\demo.go:87:21: undefined: rtsp2rtmp.FlvChunk
demos\demo.go:88:18: undefined: rtsp2rtmp.RtmpOutboundConnHandler
demos\demo.go:104:24: undefined: rtsp2rtmp.FlvChunk
demos\demo.go:105:2: undefined: rtsp2rtmp.InitRtmpHandler
demos\demo.go:106:2: undefined: rtsp2rtmp.StartPublish

[ldsforgit]

rtsp2rtmp-master/demos$ sudo go build demo.go

command-line-arguments

./demo.go:30:73: undefined: rtsp2rtmp
./demo.go:32:13: undefined: rtsp2rtmp
./demo.go:63:20: undefined: rtsp2rtmp
./demo.go:73:21: undefined: rtsp2rtmp
./demo.go:86:21: undefined: rtsp2rtmp
./demo.go:87:18: undefined: rtsp2rtmp
./demo.go:101:16: undefined: rtsp2rtmp
./demo.go:103:24: undefined: rtsp2rtmp
./demo.go:104:2: undefined: rtsp2rtmp
./demo.go:105:2: undefined: rtsp2rtmp
./demo.go:105:2: too many errors
您好，编译不了，请问你是怎么解决的呢？