Error Codes

Code	Description
0	Recognition succeed
1001	No recognition result
2000	Recording error (device may not have permission)
2001	Init failed or request timeout
2002	Metadata parse error
2004	Unable to generate fingerprint
2005	Timeout
3000	Recognition service error（http error 500）
3003	Limit exceeded, please upgrade your account
3006	Invalid arguments
3014	Invalid signature
3015	QpS limit exceeded, please upgrade your account