keep returing "video config is already set"

[wiseideal]

My android is pluged by a codec device which send data from camera to my android. In that way, I can read byte[] parsed by the device in every frame.It's formed as h264 unit.

As the byte data was send to rtmp server.I debugged the 'rtmp_sender_write_video_frame' always ended in if(nal[0] == 0x67) and my server get nothing but a empty connection.