public GetBitmap ( int position ) : |
||
position | int | Position of the frame |
return |
/// <summary>Copy a piece of video and wave sound int a new file</summary> /// <param name="newFileName">File name</param> /// <param name="startAtSecond">Start copying at second x</param> /// <param name="stopAtSecond">Stop copying at second y</param> /// <returns>AviManager for the new video</returns> public AviManager CopyTo(String newFileName, float startAtSecond, float stopAtSecond) { AviManager newFile = new AviManager(newFileName, false); try { //copy video stream VideoStream videoStream = GetVideoStream(); int startFrameIndex = (int)(videoStream.FrameRate * startAtSecond); int stopFrameIndex = (int)(videoStream.FrameRate * stopAtSecond); videoStream.GetFrameOpen(); Bitmap bmp = videoStream.GetBitmap(startFrameIndex); VideoStream newStream = newFile.AddVideoStream(false, videoStream.FrameRate, bmp); for (int n = startFrameIndex + 1; n <= stopFrameIndex; n++) { bmp = videoStream.GetBitmap(n); newStream.AddFrame(bmp); } videoStream.GetFrameClose(); //copy audio stream AudioStream waveStream = GetWaveStream(); Avi.AVISTREAMINFO streamInfo = new Avi.AVISTREAMINFO(); Avi.PCMWAVEFORMAT streamFormat = new Avi.PCMWAVEFORMAT(); int streamLength = 0; IntPtr ptrRawData = waveStream.GetStreamData( ref streamInfo, ref streamFormat, ref streamLength); int startByteIndex = (int)(startAtSecond * (float)(waveStream.CountSamplesPerSecond * streamFormat.nChannels * waveStream.CountBitsPerSample) / 8); int stopByteIndex = (int)(stopAtSecond * (float)(waveStream.CountSamplesPerSecond * streamFormat.nChannels * waveStream.CountBitsPerSample) / 8); IntPtr ptrWavePart = new IntPtr(ptrRawData.ToInt32() + startByteIndex); byte[] rawData = new byte[stopByteIndex - startByteIndex]; Marshal.Copy(ptrWavePart, rawData, 0, rawData.Length); Marshal.FreeHGlobal(ptrRawData); streamInfo.dwLength = rawData.Length; streamInfo.dwStart = 0; IntPtr unmanagedRawData = Marshal.AllocHGlobal(rawData.Length); Marshal.Copy(rawData, 0, unmanagedRawData, rawData.Length); newFile.AddAudioStream(unmanagedRawData, streamInfo, streamFormat, rawData.Length); Marshal.FreeHGlobal(unmanagedRawData); } catch (Exception ex) { newFile.Close(); throw ex; } return(newFile); }
/// <summary>Extract and display the frames</summary> private void Run() { videoStream.GetFrameOpen(); for (currentFrameIndex = 0; (currentFrameIndex < videoStream.CountFrames) && isRunning; currentFrameIndex++) { //show frame currentBitmap = videoStream.GetBitmap(currentFrameIndex); picDisplay.Invoke(new SimpleDelegate(SetDisplayPicture)); picDisplay.Invoke(new SimpleDelegate(picDisplay.Refresh)); //show position if (ctlFrameIndexFeedback != null) { ctlFrameIndexFeedback.Invoke(new SimpleDelegate(SetLabelText)); } //wait for the next frame Thread.Sleep(millisecondsPerFrame); } videoStream.GetFrameClose(); isRunning = false; if (Stopped != null) { Stopped(this, EventArgs.Empty); } }