问开始直播后crash？

iOS互动直播、刚开始直播就crash、错误信息如下，该怎么处理？2016/04/13 213748.276 | E | Thread:18576 | CmdCode | AVGVideoLogic.cpp1735OnRecvVidQosPush | AVPARAM. FLOWCTRL PUSH. MAINVIDEO. Big: codec = 5, w = 640, h = 480, fps = 15, br = 600, gop = 5, minqp = 25, maxqp = 42. Others: uiFecType = 0, uiIMtu = 1000, uiSPMtu = 1000, uiPMtu = 1000, uiIFecPrecent = 1, uiSPFecPercent = 0, uiPFecPercent = 0, uiIFecMinPkg = 0, uiSPFecMinPkg = 0, uiPFecMinPkg = 0, uiIMinPkgSize = 0, uiSPMinPkgSize = 0, uiPMinPkgSize = 0, uiGop = 5, uiMinQP = 0, uiMaxQP = 0, uiEncMode = 0, uiUseHWAccelerate = 0, uiUseQstar = 0, nQclearSwitch = 40, nQclearGrade = 0, uiFms = 0.**2016/04/13 213748.276 | E | Thread:18576 | CVideoE | VideoEncSession.cpp73CVideoEncSession | CVideoEncSession::CVideoEncSession. this = 0x10fdec000.**2016/04/13 213748.277 | E | Thread:18576 | CVideoE | VideoEncSession.cpp92Init | THREAD. Enc thread start. thread pointer = 0x10fdec220.**2016/04/13 213748.278 | E | Thread:18576 | CVideoE | VideoEncSession.cpp125Init | THREAD. Enc Timer(for sending encoded frame data.) Started. timer pointer = 0x10fdec340.**2016/04/13 213748.279 | E | Thread:18576 | CMultiM | CMultiMediaEngine.cpp1671SetVidParam | CODEC_CONTROL. Video Encoder. CreateVidEncArg. bRet = 1.**2016/04/13 213748.279 | E | Thread:18633 | CVideoE | VideoEncSession.cpp285OnEncThread | enCmdCreatVidEncArg**2016/04/13 213748.279 | E | Thread:18576 | AVGSDK | AVGUDT.cpp799UDTSetSendParams | UDT wQueuePeriod2000 wResendMin200 wResendMax2000 wRTTDelta150 wMaxResendCnt5 wTimerResendCnt3**2016/04/13 213748.280 | E | Thread:18633 | CVideoE | VideoEncoder.cpp291Init | CVideoEncoder::Init H264**2016/04/13 213748.280 | E | Thread:18633 | CVideoE | VideoEncoder.cpp373Init | CVideoEncoder::Init. m_pEncoder = 1213759408 size 640x480 birate 582 fps 15,nEncMode=1,nMaxQp=42,nMinQp=25**x264 warning: max bitrate less than average bitrate, assuming CBR**x264 error: