AnimatGuiCtrls.Video.Avi.AVIStreamLength C# (CSharp) Method

        public static extern int AVIStreamLength(int pavi);

        /// <summary>Returns all data needed to copy the stream</summary>
        /// <remarks>Do not forget to call Marshal.FreeHGlobal and release the raw data pointer</remarks>
        /// <param name="streamInfo">Receives the header information</param>
        /// <param name="format">Receives the format</param>
        /// <param name="streamLength">Receives the length of the stream</param>
        /// <returns>Pointer to the wave data</returns>
        public IntPtr GetStreamData(ref Avi.AVISTREAMINFO streamInfo, ref Avi.PCMWAVEFORMAT format, ref int streamLength)
        {
            streamInfo = GetStreamInfo();

            format = GetFormat();
            //length in bytes = length in samples * length of a sample
            streamLength = Avi.AVIStreamLength(aviStream.ToInt32()) * streamInfo.dwSampleSize;
            IntPtr waveData = Marshal.AllocHGlobal(streamLength);

            int result = Avi.AVIStreamRead(aviStream, 0, streamLength, waveData, streamLength, 0, 0);

            if (result != 0)
            {
                throw new Exception("Exception in AVIStreamRead: " + result.ToString());
            }

            return(waveData);
        }