/// <summary>Add a wave audio stream from another file to this file</summary>
/// <param name="waveFileName">Name of the wave file to add</param>
/// <param name="startAtFrameIndex">Index of the video frame at which the sound is going to start</param>
public void AddAudioStream(String waveFileName, int startAtFrameIndex)
{
AviManager audioManager = new AviManager(waveFileName, true);
AudioStream newStream = audioManager.GetWaveStream();
AddAudioStream(newStream, startAtFrameIndex);
audioManager.Close();
}
/// <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;
}