demo can't get video type and audio type

[wayne666]

Hi, When i run rtmp_play.go demo, i can't get the video type and audio type.
Output is like:

@@@@@@@@@@@@@status: 1, err:
connect message in package &gortmp.Message{ChunkStreamID:0x3, Timestamp:0x0, Size:0xd5, Type:0x14, StreamID:0x0, Buf:(*bytes.Buffer)(0xc4200a83f0), IsInbound:false, AbsoluteTimestamp:0x0}@@@@@@@@@@@@@status: 3, err:
ReceviedCommand: &{IsFlex:false Name:_result TransactionID:1 Objects:[map[fmsVer:FMS/3,0,1,123 capabilities:31 mode:1] map[version:3,5,1,516 level:status code:NetConnection.Connect.Success description:Connection succeeded. objectEncoding:0 data:0]]}
ReceviedCommand: &{IsFlex:false Name:onBWDone TransactionID:0 Objects:[]}
@@@@@@@@@@@@@status: 5, err:
ReceviedCommand: &{IsFlex:false Name:_result TransactionID:2 Objects:[ 1]}
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
Audio size: 0 bytes; Vedio size: 0 bytes
@@@@@@@@@@@@@status: 0, err:
@@@@@@@@@@@@@closed