屏幕录制gif软件_手机录屏咋录内部声音

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效果图如下：

工程源码见文章结尾

通过录制屏幕的区域可以预览生成的GIF图片图片比较清晰源码中可以修改gif质量源码中可以修改gif帧数通过鼠标选择需要的区域


            FrmRect frmRect = new FrmRect();
            frmRect.ShowDialog();
            m_rect = frmRect.Rect;
            label4.Text = "区域设定完成";

   protected override void OnLoad(EventArgs e) {
            Rectangle rect = Win32.GetDesktopRect();
            this.Location = rect.Location;
            this.Size = rect.Size;

            m_img = this.GetScreen();
            m_imgDark = new Bitmap(this.Width,this.Height);
            using (SolidBrush sb = new SolidBrush(Color.FromArgb(127, 0, 0, 0))) {

.......
}

  private Image GetScreen() {
            Bitmap bmp = new Bitmap(this.Width, this.Height);
            using (Graphics g = Graphics.FromImage(bmp)) {
                g.CopyFromScreen(0, 0, 0, 0, bmp.Size);

  if (btn_start.Text == "开始录制")
            {
                if (m_scrRecorder != null) m_scrRecorder.Clear();
                m_scrRecorder = null;

                if (m_scrRecorder == null)
                {
                    if (m_rect != Rectangle.Empty)
                    {
                        m_scrRecorder = new ScreenRecorder(m_rect, 100);
                        

                    }
                    else
                    {
                        MessageBox.Show("确保对应的录制方式 有选择数据");
                        return;
                    }
                }
                m_scrRecorder.DrawCursor = chk_drawMouse.Checked;
                m_scrRecorder.Start();
                btn_start.Text = "停止";
                btn_preview.Enabled = false;
                label4.Text = "正在录制";

            }
            else
            {
                m_scrRecorder.Stop();
                btn_start.Text = "开始录制";
                 btn_preview.Enabled = true;
                label4.Text = "录制完成";

            }
        }

 private string GetImageHash(Image img)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
                byte[] byImg = new byte[ms.Length];
                ms.Seek(0, SeekOrigin.Begin);
                ms.Read(byImg, 0, byImg.Length);
                return BitConverter.ToString(System.Security.Cryptography.MD5.Create().ComputeHash(byImg)).Replace("-", "");
            }
        }
    }

       private bool m_bGet;
        private GIFColorDepth m_cd;
        private List<byte> m_lst = new List<byte>();


        private int m_nIndexTrans;                        // transparent index in color table
        private int m_nRepeat = 0;                        // 0=repeat forever

        private byte[] m_nIndexedPixels;                  // converted frame indexed to palette
        private byte[] m_byColorTabs;                     // RGB palette
        private bool[] m_bUsedEntrys = new bool[256];     // active palette entries
        private int m_nPalSize = 7;                       // color table size (bits-1)
        private int n_nDispose = -1;                      // disposal code (-1 = use default)
        private bool m_bFirstFrame = true;

        public GIFCreator(int nWidth, int nHeight, GIFColorDepth cd) {
            this._Width = nWidth;
            this._Height = nHeight;
            m_cd = cd;
            m_lst.AddRange(Encoding.ASCII.GetBytes("GIF89a"));
            this.WriteLSD();    // logical screen descriptior
        }

        public void AddFrame(Image img, int nSleep) {
            if (m_bGet) {       //如果获取过图像数据 那么把末尾的结束标志去掉
                m_lst.RemoveAt(m_lst.Count - 1);
                m_bGet = false;
            }
            this.AnalyzePixels(this.GetImagePixels(img));   // build color table & map pixels
            if (m_bFirstFrame) {
                this.WritePalette();                        // global color table
                if (m_nRepeat >= 0) {
                    this.WriteNetscapeExt();                // use NS app extension to indicate reps
                }
            }
            this.WriteGraphicCtrlExt(nSleep);               // write graphic control extension
            this.WriteImageDesc();                          // image descriptor
            if (!m_bFirstFrame) {
                this.WritePalette();                        // local color table
            }
            this.WritePixels();                             // encode and write pixel data
            m_bFirstFrame = false;
        }