使用C#對華為IPC攝像頭二次開發（二）請訪問：https://www.cnblogs.com/wdw984/p/13572644.html
開發環境：
作業系統：Win10 x64專業版2004
開發工具：VS2019 16.7.2
目標平臺：x86，因為要操作記憶體，所以要打開允許非安全代碼（專案屬性==》生成==》勾選允許不安全代碼）
首先去下載IPC SDK（點擊下載，需要華為授權賬戶，）
新建一個WPF的專案，Framework版本為4.7
把下載的sdk壓縮包中的windows\output32目錄中的HWPuSDK.dll和lib目錄中的所有檔案，都復制到專案的bin/debug目錄中（和生成的exe同級），華為的這個SDK對64位支持不好，使用64位遇到不少問題，最侄訓是先采用32位的DLL，
專案中對影像的手動處理，經過對比，在Emgu CV和OpenCVSharp4中采用了OpenCVSharp4，個人感覺OpenCVSharp4使用起來更簡潔方便，
專案中對視頻流的回呼手動處理展示，采用WriteableBitmap（參考呂毅大神的《WPF 高性能位圖渲染 WriteableBitmap 及其高性能用法示例》），本來想采用D3D這種顯卡加速的方法，無奈沒有找到相關文章和資料，如果哪位大神有資料，還望告知一下，謝謝！
專案中參考了以下組件
在本次開發中，我們先實作自動預覽攝像頭視頻和手動對攝像頭視頻流進行處理，
因為SDK自動播放需要傳入一個控制元件的句柄，而WPF中表單上所有控制元件的句柄都是表單本身，所以我們還需要使用WindowsFromHost來使用Winform的一些控制元件來實作播放句柄的傳入，
專案中參考WindowsFromsIntegeration
在專案的MainWindow.xaml中添加三個按鈕、兩個RadioButton、一個Winform的PictureBox和一個WPF的Image控制元件，大致布局如下：
詳細的xaml代碼：
<Window x:Class="HuaWeiCamera.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms" mc:Ignorable="d" WindowStartupLocation="CenterScreen" Loaded="MainWindow_OnLoaded" Title="MainWindow" Height="800" Width="1200" Closed="MainWindow_OnClosed"> <Grid Margin="0,0,2,0"> <Grid.RowDefinitions> <RowDefinition Height="60"></RowDefinition> <RowDefinition Height="*"></RowDefinition> </Grid.RowDefinitions> <WrapPanel VerticalAlignment="Center"> <StackPanel Margin="30,5,0,0" VerticalAlignment="Center"> <Button Content="預覽攝像頭" HorizontalAlignment="Center" VerticalAlignment="Center" Width="75" Height="30" Click="ButtonView_OnClick" /> <WrapPanel Margin="0,5,0,0"> <RadioButton Content="自動處理" VerticalAlignment="Center" IsChecked="True" GroupName="PlayMode" x:Name="RadioButtonAuto" /> <RadioButton Content="手動處理" VerticalAlignment="Center" GroupName="PlayMode" x:Name="RadioButtonManual" Margin="10,0,0,0" /> </WrapPanel> </StackPanel> <Button x:Name="ButtonSaveOne" Content="抓拍一張" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="30,0,0,0" Width="75" Height="30" IsEnabled="False" Click="ButtonSave_OnClick" />
<Button Content="人臉抓拍" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="30,0,0,0" Width="75" Height="30" /> </WrapPanel> <WrapPanel Grid.Row="1"> <WindowsFormsHost HorizontalAlignment="Center" Width="1200" Height="700" VerticalAlignment="Center" x:Name="FormsHostVideo"> <wf:PictureBox x:Name="ImagePlay"></wf:PictureBox> </WindowsFormsHost> <Image VerticalAlignment="Center" HorizontalAlignment="Center" x:Name="CanvaVideo" Stretch="Fill" Source="{Binding Path=VideoWriteableBitmap}" /> </WrapPanel> </Grid> </Window>
在App.cs中定義下日志記錄類
public partial class App : Application { public static NLog.Logger NewNLog; private void App_OnStartup(object sender, StartupEventArgs e) { DispatcherUnhandledException += App_DispatcherUnhandledException; NewNLog = NLog.LogManager.GetLogger("HuaWeiCameraLoger"); } }
根據華為的《SDC 8.0.1 SDK開發指南》，我們要實作攝像頭預覽，需要先定義以下幾個struct和enum：
sturct：PU_REAL_PLAY_INFO_S（視頻實時預覽結構體）、PU_TIME_S（時間結構體）
enum：PU_PROTOCOL_TYPE（傳輸協議型別）、PU_STREAM_TYPE（碼流型別）、PU_VIDEO_TYPE（資料流型別）、PU_MEDIA_CRYPTO_TYPE（加密型別）、PU_MEDIA_CALLBACK_TYPE（回呼型別）
using System; using System.Runtime.InteropServices; using HuaWeiCamera.Enums; using HuaWeiCamera.Enums.Media; using HuaWeiCamera.Enums.Video; namespace HuaWeiCamera.Struct { /// <summary> /// 視頻實時預覽結構體,http://www.cnblogs.com/wdw984 /// </summary> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)] public struct PU_REAL_PLAY_INFO_S { /// <summary> /// 設備通道號，一般為101， /// </summary> public uint ulChannelId; /// <summary> /// 播放視窗句柄,為IntPtr.Zero表示用戶自己處理視頻資料流，不自動播放視頻流 /// </summary> public IntPtr hPlayWnd; /// <summary> /// 碼流型別,主碼流、子碼 /// </summary> public PU_STREAM_TYPE enStreamType; /// <summary> /// 流型別：視頻流、音頻流、復合流、錄 像流、元資料 /// </summary> public PU_VIDEO_TYPE enVideoType; /// <summary> /// 傳輸協議型別，UDP,TCP /// </summary> public PU_PROTOCOL_TYPE enProtocolType; /// <summary> /// 回呼型別：0:RTP解密1:RTP不解密 2:Frame 3:YUV /// </summary> public PU_MEDIA_CALLBACK_TYPE enMediaCallbackType; /// <summary> /// 請求端IP，第三方平臺可以不填，SDK會 自動獲取 /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)] public string szLocalIp; /// <summary> /// 是否保活 /// </summary> public bool bKeepLive; /// <summary> /// 請求預錄、錄像開始時間（本地時 間）， /// </summary> public PU_TIME_S stStartTime; /// <summary> /// 請求預錄、錄像結束時間（本地時 間）， /// </summary> public PU_TIME_S stEndTime; /// <summary> /// 加密型別，只支持AES加密， /// </summary> public PU_MEDIA_CRYPTO_TYPE enMediaCryptoType; /// <summary> /// 加密密鑰 /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 44)] public string szMediaCrypto; /// <summary> /// szReserved[0-15]表示組播IP地址 /// szReserved[16-19]表示組播埠 /// szReserved[22]表示智能分析資料打包 格式 0:XML,1:元資料 /// szReserved[23]表示元資料請求型別，取值參考列舉 PU_METADATA_REQUEST_TYPE_E定義 /// </summary> [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] szReserved; } }
namespace HuaWeiCamera.Enums { /// <summary> /// 視頻流型別,http://www.cnblogs.com/wdw984 /// </summary> public enum PU_STREAM_TYPE { /// <summary> /// 視頻主碼流 /// </summary> PU_VIDEO_MAIN_STREAM=0, /// <summary> /// 視頻子碼流 /// </summary> PU_VIDEO_SUB_STREAM1, /// <summary> /// 視頻子碼流2（VWareC01 不支持） /// </summary> PU_VIDEO_SUB_STREAM2, /// <summary> /// 視頻子碼流3（VWareC01 不支持） /// </summary> PU_VIDEO_SUB_STREAM3, /// <summary> /// 視頻子碼流4 /// </summary> PU_VIDEO_SUB_STREAM4, /// <summary> /// 視頻子碼流5 /// </summary> PU_VIDEO_SUB_STREAM5, /// <summary> /// 預留值 /// </summary> PU_VIDEO_STREAM_MAX } }
namespace HuaWeiCamera.Enums.Video { /// <summary> /// 碼流型別,http://www.cnblogs.com/wdw984 /// </summary> public enum PU_VIDEO_TYPE { /// <summary> /// 視頻流 /// </summary> PU_VIDEO_TYPE_VIDEO = 0, /// <summary> /// 音頻流 /// </summary> PU_VIDEO_TYPE_AUDIO, /// <summary> /// 復合流 /// </summary> PU_VIDEO_TYPE_MUX, /// <summary> /// 錄像流 /// </summary> PU_VIDEO_TYPE_RECORD, /// <summary> /// 元資料流 /// </summary> PU_VIDEO_TYPE_META, /// <summary> /// 視頻+元資料流 /// </summary> PU_VIDEO_TYPE_VIDEO_META, /// <summary> /// 預留值 /// </summary> PU_VIDEO_TYPE_MAX } }
namespace HuaWeiCamera.Enums { /// <summary> /// 資料傳輸型別,http://www.cnblogs.com/wdw984 /// </summary> public enum PU_PROTOCOL_TYPE { /// <summary> /// UDP /// </summary> PU_PROTOCOL_TYPE_UDP = 0, /// <summary> /// TCP /// </summary> PU_PROTOCOL_TYPE_TCP, /// <summary> /// 組播方式 /// </summary> PU_PROTOCOL_TYPE_MULTICAST, /// <summary> /// 預留值 /// </summary> PU_PROTOCOL_TYPE_MAX } }
namespace HuaWeiCamera.Enums.Media { /// <summary> /// 媒體回呼型別,http://www.cnblogs.com/wdw984 /// </summary> public enum PU_MEDIA_CALLBACK_TYPE { /// <summary> /// RTP包方式 /// </summary> PU_MEDIA_CALLBACK_TYPE_RTP = 0, /// <summary> /// RTP包形式，不解密 /// </summary> PU_MEDIA_CALLBACK_TYPE_RTP_CRYPTO, /// <summary> /// 幀回呼方式 /// </summary> PU_MEDIA_CALLBACK_TYPE_FRAME, /// <summary> /// YUV方式，Linux不支持 /// </summary> PU_MEDIA_CALLBACK_TYPE_YUV, /// <summary> /// 把RTP包回呼給控制元件方處理方式，Linux不支持 /// </summary> PU_MEDIA_CALLBACK_TYPE_FOR_STORAGE, /// <summary> /// 智能元資料方式 /// </summary> PU_MEDIA_CALLBACK_TYPE_META_FRAME, /// <summary> /// 預留值 /// </summary> PU_MEDIA_CALLBACK_TYPE_MAX } }
using System.Runtime.InteropServices; namespace HuaWeiCamera.Struct { /// <summary> /// 時間結構體，http://www.cnblogs.com/wdw984 /// </summary> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)] public struct PU_TIME_S { /// <summary> /// 年 /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 5)] public string szYear; /// <summary> /// 月 /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 3)] public string szMonth; /// <summary> /// 日 /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 3)] public string szDay; /// <summary> /// 時 /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 3)] public string szHour; /// <summary> /// 分 /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 3)] public string szMinute; /// <summary> /// 秒 /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 3)] public string szSecond; } }
定義一個靜態類，用來實作呼叫SDK和攝像頭互動（HuaWeiSDKHelper）
using System; using System.Runtime.InteropServices; using HuaWeiCamera.Enums; using HuaWeiCamera.Enums.SnapShot; using HuaWeiCamera.Struct; namespace HuaWeiCamera.Class { /// <summary> /// 華為HoloSens SDC二次開發使用，http://www.cnblogs.com/wdw984 /// </summary> public static class HuaWeiSdkHelper { private const string SdkPath= "HWPuSDK.dll"; #region 初始化和登錄 /// <summary> /// 初始化設備 /// </summary> /// <param name="ulLinkMode">0自動 1手動 3混合模式</param> /// <param name="szLocalIp">本地IP</param> /// <param name="ulLocalPort">本地埠</param> /// <returns></returns> [DllImport(SdkPath, EntryPoint = "IVS_PU_Init", CharSet = CharSet.Ansi, SetLastError = true, PreserveSig = true, CallingConvention = CallingConvention.StdCall)] public static extern bool IVS_Pu_Init(uint ulLinkMode, string szLocalIp, uint ulLocalPort); /// <summary> /// 遠程登錄設備 /// </summary> /// <param name="szLoginIp">設備IP</param> /// <param name="ulLoginPort">設備埠 6060</param> /// <param name="szUserName">登錄名 ApiAdmin</param> /// <param name="szPasswd">登錄密碼 HuaWei123</param> /// <returns></returns> [DllImport(SdkPath, EntryPoint = "IVS_PU_Login", CharSet = CharSet.Ansi, SetLastError = true, PreserveSig = true, CallingConvention = CallingConvention.StdCall)] public static extern uint IVS_PU_Login(string szLoginIp, uint ulLoginPort, string szUserName, string szPasswd); /// <summary> /// 初始化和登錄設備 /// </summary> /// <param name="sdcIp">SDC設備IP</param> /// <param name="sdcPort">SDC設備埠</param> /// <param name="sdcUser">SDC登錄用戶名</param> /// <param name="sdcPwd">SDC登錄密碼</param> /// <param name="errMsg">失敗時的錯誤資訊</param> /// <param name="ulIdentifyId">登錄成功后回傳登錄句柄</param> public static void InitAndLogin(string sdcIp,uint sdcPort,string sdcUser,string sdcPwd,out uint ulIdentifyId,out string errMsg) { ulIdentifyId = 0; errMsg = ""; //要開啟TLS的情況時：初始化呼叫IVS_PU_InitEx介面，登錄呼叫IVS_PU_Login 介面時埠號設定為6061 if (!IVS_Pu_Init(1, "192.168.2.144", 6060)) { errMsg=($"設備初始化失敗，{GetLastErrorInfo()}"); return; } ulIdentifyId = IVS_PU_Login(sdcIp, sdcPort, sdcUser, sdcPwd); if (ulIdentifyId == 0) { errMsg=$"設備登錄失敗，{GetLastErrorInfo()}"; } } #endregion #region 預覽相關 /// <summary> /// 實時預覽 /// </summary> /// <param name="ulIdentifyId">登錄成功后回傳的用戶編號</param> /// <param name="pstRealPlayInfo">播放結構體</param> /// <param name="fRealDataCallBack">回呼實作播放</param> /// <param name="pUsrData">傳入碼流資料 回呼函式作為引數</param> /// <returns></returns> [DllImport(SdkPath, EntryPoint = "IVS_PU_RealPlay")] public static extern uint IVS_PU_RealPlay(uint ulIdentifyID, PU_REAL_PLAY_INFO_S[] pstRealPlayInfo, PfRealDataCallBack fRealDataCallBack, ref IntPtr pUsrData); public delegate void PfRealDataCallBack(IntPtr szBuffer, int lSize, IntPtr pUsrData); /// <summary> /// 停止實時預覽 /// </summary> /// <param name="ulIdentifyId">登錄成功后回傳的用戶編號</param> /// <param name="ulRealHandle">實時播放句柄</param> /// <returns></returns> [DllImport(SdkPath, EntryPoint = "IVS_PU_StopRealPlay", CharSet = CharSet.Ansi, SetLastError = true, PreserveSig = true, CallingConvention = CallingConvention.StdCall)] public static extern uint IVS_PU_StopRealPlay(uint ulIdentifyId, uint ulRealHandle); #endregion #region 錯誤資訊相關 /// <summary> /// 獲取最后一次錯誤代碼 /// </summary> /// <returns></returns> [DllImport(SdkPath, EntryPoint = "IVS_PU_GetLastError", CharSet = CharSet.Ansi, SetLastError = true, PreserveSig = true, CallingConvention = CallingConvention.StdCall)] private static extern int IVS_PU_GetLastError(); /// <summary> /// 根據錯誤代碼回傳錯誤資訊 /// </summary> /// <param name="ulErrorNo">錯誤編號</param> /// <returns></returns> [DllImport(SdkPath, EntryPoint = "IVS_PU_GetErrorMsg", CharSet = CharSet.Ansi, SetLastError = true, PreserveSig = true, CallingConvention = CallingConvention.StdCall)] private static extern IntPtr IVS_PU_GetErrorMsg(int ulErrorNo); /// <summary> /// 回傳最后一次錯誤碼和錯誤資訊 /// </summary> /// <returns></returns> public static string GetLastErrorInfo() { var lastErrorCode = IVS_PU_GetLastError(); var lastErrorMsg = Marshal.PtrToStringAnsi(IVS_PU_GetErrorMsg(lastErrorCode)); return $"錯誤碼：{IVS_PU_GetLastError()}，錯誤資訊：{lastErrorMsg}"; } #endregion #region 退出登錄 /// <summary> /// 退出登錄 /// </summary> /// <param name="ulIdentifyId">登錄成功后回傳的句柄編號</param> /// <returns></returns> [DllImport(SdkPath, EntryPoint = "IVS_PU_Logout", CharSet = CharSet.Ansi, SetLastError = true, PreserveSig = true, CallingConvention = CallingConvention.StdCall)] public static extern bool IVS_PU_Logout(uint ulIdentifyId); /// <summary> /// 反注冊設備，退出時進行設備釋放 /// </summary> /// <returns></returns> [DllImport(SdkPath, EntryPoint = "IVS_PU_Cleanup", CharSet = CharSet.Ansi, SetLastError = true, PreserveSig = true, CallingConvention = CallingConvention.StdCall)] public static extern bool IVS_PU_Cleanup(); #endregion } }
定義一個繼承了INotifyPropertyChanged的Model，用來實作重繪Image控制元件
public class VideoYuvModelView : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; private WriteableBitmap bitmapImage { get; set; } public WriteableBitmap VideoWriteableBitmap { get => bitmapImage; set { bitmapImage = value; PropertyChanged?.Invoke(this,new PropertyChangedEventArgs("VideoBitmapImage")); } } }
在MainWindow.cs中我們需要定義一些變數：
private uint _ulIdentifyId;//登錄攝像頭后回傳的編號 private uint _ulRealHandleId;//呼叫預覽SDK回傳的結果值 private static bool _isSave;//是否保存當前幀為圖片 private static bool _isExit;//是否退出
private static HuaWeiSdkHelper.PfRealDataCallBack _fedRealPlayCallbackWithYUV;//手動處理攝像頭回呼時的委托事件
private const uint ByteLength = 1920 * 1080 * 4;//位圖的大小 private static readonly VideoYuvModelView VideoYuvModelView = new VideoYuvModelView();//Image的資料源，用來手動處理視頻時候展示影像 private IntPtr _videoPlayHandle = IntPtr.Zero;//自動預覽時的控制元件句柄 [DllImport("kernel32.dll")] private static extern void CopyMemory(IntPtr destination, IntPtr source, uint length);//用來復制記憶體中的資料
在表單初始化和加載事件中，我們來初始化一些資料的系結
public MainWindow() { InitializeComponent(); VideoYuvModelView.VideoWriteableBitmap = new WriteableBitmap(1920, 1800, 96.0, 96.0, PixelFormats.Bgr32, null);//因為攝像頭回傳的圖片大小時1920*1080，所以這里定義的大小要和回傳的圖片大小一致 } private void MainWindow_OnLoaded(object sender, RoutedEventArgs e) { CanvaVideo.DataContext = VideoYuvModelView;//手動處理時，Image控制元件資料源 _videoPlayHandle = ImagePlay.Handle;//自動處理時，使用Winform的控制元件句柄 }
預覽攝像頭按鈕事件，中間根據選中的自動處理和手動處理來分別做出不同的相應
#region 視頻預覽（自動和手動處理視頻流） private void ButtonView_OnClick(object sender, RoutedEventArgs e) { if (0 == _ulIdentifyId) {
//這里通過網路登錄到攝像頭，具體埠、用戶名、密碼請參考開發手冊 HuaWeiSdkHelper.InitAndLogin("192.168.2.250", 6060, "ApiAdmin", "HuaWei123", out _ulIdentifyId, out string errMsg); if (0 == _ulIdentifyId) { MessageBox.Show(errMsg); return; } } var prpInfos = new PU_REAL_PLAY_INFO_S[1]; var clientInfo = new PU_REAL_PLAY_INFO_S { ulChannelId = 101, hPlayWnd = _videoPlayHandle, enProtocolType = PU_PROTOCOL_TYPE.PU_PROTOCOL_TYPE_TCP, enStreamType = PU_STREAM_TYPE.PU_VIDEO_MAIN_STREAM, enVideoType = PU_VIDEO_TYPE.PU_VIDEO_TYPE_VIDEO, enMediaCryptoType = PU_MEDIA_CRYPTO_TYPE.PU_MEDIA_CRYPTO_NONE, enMediaCallbackType = PU_MEDIA_CALLBACK_TYPE.PU_MEDIA_CALLBACK_TYPE_RTP, szReserved = new byte[32], bKeepLive = true }; IntPtr pUsrData = (IntPtr)_ulIdentifyId; if (RadioButtonManual.IsChecked == true) { //手動處理視頻預覽 FormsHostVideo.Visibility = Visibility.Collapsed; CanvaVideo.Visibility = Visibility.Visible; clientInfo.hPlayWnd = IntPtr.Zero; clientInfo.enMediaCallbackType = PU_MEDIA_CALLBACK_TYPE.PU_MEDIA_CALLBACK_TYPE_YUV; prpInfos[0] = clientInfo; _fedRealPlayCallbackWithYUV = FedRealPlayCallbackWithYUV; //手動處理回呼 _ulRealHandleId = HuaWeiSdkHelper.IVS_PU_RealPlay(_ulIdentifyId, prpInfos, _fedRealPlayCallbackWithYUV, ref pUsrData); if (0 == _ulRealHandleId) { MessageBox.Show(HuaWeiSdkHelper.GetLastErrorInfo()); } ButtonSaveOne.IsEnabled = true;//點擊 抓拍一張 按鈕，會把_isSave變數設定為true，從而在回呼事件中可以保存當前幀為圖片 } else {
ButtonSaveOne.IsEnabled = false; CanvaVideo.Visibility = Visibility.Collapsed; FormsHostVideo.Visibility = Visibility.Visible; prpInfos[0] = clientInfo; //傳入句柄，自動預覽 _ulRealHandleId = HuaWeiSdkHelper.IVS_PU_RealPlay(_ulIdentifyId, prpInfos, null, ref pUsrData); if (0 == _ulRealHandleId) { MessageBox.Show(HuaWeiSdkHelper.GetLastErrorInfo()); } } } #region 手動決議YUV資料并展示在界面上 private static void FedRealPlayCallbackWithYUV(IntPtr szBuffer, int lSize, IntPtr pUsrData) { if (_isExit) return; try { Span<byte> nativeSpan; unsafe { nativeSpan = new Span<byte>(szBuffer.ToPointer(), lSize); } if (nativeSpan.Length > 0) { #region 處理視頻流YUV影像 Mat yuvImg = new Mat(1080 * 3 / 2, 1920, MatType.CV_8UC1); Mat rgbImg = new Mat(1080, 1920, MatType.CV_8UC1); Marshal.Copy(nativeSpan.ToArray(), 0, yuvImg.Data, nativeSpan.Length); Cv2.CvtColor(yuvImg, rgbImg, ColorConversionCodes.YUV2RGBA_I420); Application.Current.Dispatcher?.InvokeAsync(() => { VideoYuvModelView.VideoWriteableBitmap.Lock(); unsafe { CopyMemory(VideoYuvModelView.VideoWriteableBitmap.BackBuffer, new IntPtr(rgbImg.DataPointer), ByteLength); } VideoYuvModelView.VideoWriteableBitmap.AddDirtyRect(new Int32Rect(0, 0, 1920, 1080)); VideoYuvModelView.VideoWriteableBitmap.Unlock(); }); if (_isSave) { Cv2.ImWrite(Path.Combine($"{AppDomain.CurrentDomain.BaseDirectory}", "jpg",$"{Guid.NewGuid()}.jpg"), rgbImg); _isSave = false; } #endregion } } catch (Exception e) { App.NewNLog.Error($"決議視頻流出錯：{e}"); } } #endregion #endregion
在程式關閉的時候進行資源釋放，
private void MainWindow_OnClosed(object sender, EventArgs e) { _isExit = true;if (_ulRealHandleId > 0) { HuaWeiSdkHelper.IVS_PU_StopRealPlay(_ulIdentifyId, _ulRealHandleId);//停止預覽 } if (_ulIdentifyId > 0) { HuaWeiSdkHelper.IVS_PU_Logout(_ulIdentifyId);//退出登錄 } HuaWeiSdkHelper.IVS_PU_Cleanup();//SDK資源釋放 }
具體效果如下：
1、自動預覽
2、手動處理
但是這里的YUV回呼填充到WriteableBitmap遇到個問題，就是無法填滿WriteableBitmap（把WriteableBitmap中的資料保存下來也是和預覽的效果一樣，估計是填充的演算法不對），只能填充一部分，這里涉及到本人的知識盲區，暫時沒法解決掉，
3、一幀影像保存為本地圖片
至此我們使用C#初步實作了華為IPC攝像頭的預覽和資料流處理（也可以把處理型別換成視頻流，然后存本地視頻檔案，因為默認時h265編碼格式，播放時使用PotPlayer播放器來播放），算是入門了，
下一章我們將實作呼叫SDK來實作人臉自動抓拍效果，
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/1739.html
標籤：WPF