可以根据对应的接口函数进行修改（例如：imaging、media相关的接口）。
修改方法：

1. 获取要修改的参数
   每个设置函数均有对应的获取配置函数，为了不造成系统内存错误，应先用对应的获取函数获取配置信息。
2. 修改参数
   这一步是直接用获取到的参数，只需要修改部分你想修改参数即可，不涉及到内存的分配。
3. 将修改后的参数用设置函数写入至摄像机
   这一步则是调用设置函数，将修改后的参数写入设备。

示例代码如下： int ONVIF_IMG_SetImagingSettings(char *pcImagingXAddr, char *ProfileToken, struct _imagingSettings * pstru_ImgSettingRsu) { int result = 0; struct soap *soap = NULL; struct _timg__GetImagingSettings reqG; struct _timg__GetImagingSettingsResponse repG; struct _timg__SetImagingSettings reqS; struct _timg__SetImagingSettingsResponse repS; enum xsd__boolean ForceStorage; SOAP_ASSERT(NULL != pcImagingXAddr); SOAP_ASSERT(NULL != ProfileToken); SOAP_ASSERT(NULL != pstru_ImgSettingRsu); SOAP_ASSERT(NULL != (soap = ONVIF_soap_new(SOAP_SOCK_TIMEOUT))); memset(&reqS, 0x00, sizeof(struct _timg__SetImagingSettings)); memset(&repS, 0x00, sizeof(struct _timg__SetImagingSettingsResponse)); memset(&reqG, 0x00, sizeof(struct _timg__SetImagingSettings)); memset(&repG, 0x00, sizeof(struct _timg__SetImagingSettingsResponse)); //获取系统原来的配置 reqG.VideoSourceToken = ProfileToken; ONVIF_SetAuthInfo(soap, USERNAME, PASSWORD); //鉴权 result = soap_call___timg__GetImagingSettings(soap, pcImagingXAddr, NULL, &reqG, &repG); SOAP_CHECK_ERROR(result, soap, "GetImagingSettings"); //修改某些参数写入设备 reqS.VideoSourceToken = ProfileToken; reqS.ForcePersistence = &ForceStorage; *reqS.ForcePersistence = pstru_ImgSettingRsu->ForceStorage; reqS.ImagingSettings = repG.ImagingSettings; *reqS.ImagingSettings->Brightness = pstru_ImgSettingRsu->Brightness; *reqS.ImagingSettings->ColorSaturation = pstru_ImgSettingRsu->ColorSaturation; *reqS.ImagingSettings->Contrast = pstru_ImgSettingRsu->Contrast; reqS.ImagingSettings->Focus->AutoFocusMode = pstru_ImgSettingRsu->FocusMode; ONVIF_SetAuthInfo(soap, USERNAME, PASSWORD); //鉴权 result = soap_call___timg__SetImagingSettings(soap, pcImagingXAddr, NULL, &reqS, &repS); SOAP_CHECK_ERROR(result, soap, "SetImagingSettings"); EXIT: if (NULL != soap) { ONVIF_soap_delete(soap); } return result; } main函数调用 //修改一些参数 gstru_ImgSetting.ForceStorage = xsd__boolean__true_; gstru_ImgSetting.FocusMode = (enum tt__AutoFocusMode)fSpeed;//auto ONVIF_IMG_SetImagingSettings(gstru_CapaAddr.caImagingAddr, gstru_CapaAddr.caMainVideoSourceToken, &gstru_ImgSetting); 以上示例代码实现了通过onvif协议修改摄像头的AutoFocusMode(对焦模式)、Brightness(亮度)、ColorSaturation( {MOD}彩饱和度)、Contrast(饱和度)等参数。