public async Task <int> StopRealPreview() { if (m_lReadHandle < 0) { LoggerService.logger.Error($"摄像头{ip},未启动过预览。"); return(-1); } if (!HKNetSDKS.NET_DVR_StopRealPlay(m_lReadHandle)) { LoggerService.logger.Error($"摄像头{ip},播放器无法停止预览。错误代码:{HKNetSDKS.NET_DVR_GetLastError()}"); } if (m_lPort >= 0) { if (!HKPlayCtrlSDK.PlayM4_Stop(m_lPort)) { LoggerService.logger.Error($"摄像头{ip},播放器无法停止工作。错误代码:{HKPlayCtrlSDK.PlayM4_GetLastError(m_lPort)}"); } if (!HKPlayCtrlSDK.PlayM4_CloseStream(m_lPort)) { LoggerService.logger.Error($"摄像头{ip},播放器无法关闭数据流。错误代码:{HKPlayCtrlSDK.PlayM4_GetLastError(m_lPort)}"); } if (!HKPlayCtrlSDK.PlayM4_FreePort(m_lPort)) { LoggerService.logger.Error($"摄像头{ip},播放器无法释放播放端口。错误代码:{HKPlayCtrlSDK.PlayM4_GetLastError(m_lPort)}"); } m_lPort = -1; } LoggerService.logger.Info($"摄像头{ip},已停止预览。"); m_lReadHandle = -1; Statue = CameraStatue.StopReadPlay; if (PictrueBoxId != null) { PictrueBoxId.Invalidate(); PictrueBoxId = null; } return(0); }