streaming mp4 file fail

[ywangwxd]

{
"free": 16,
"reserved": 0,
"wait": 0,
"writable": 0,
"busy": 0
"buffer_full": 0
"current_read": -1
"newest_write": 0
"oldest_write": -1
}
Accepting new clients...
Finding video stream.
Checking stream 0
Got stream
Got params
Got type
starting new segment
Initializing segment
[matroska @ 0x7f9401d330] Tag mp4a incompatible with output codec id '86018' ([255][0][0][0])
Error occured while writing header: Invalid data found when processing input
Initialized segment.
segment id = 0
Segmentation fault (core dumped)