How to start audio and video capture /merge audio and video using aforge ffmpeg in C#

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C#

video

audio-video

ffmpeg

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I have Created audio and video capture method and Save thee two file in to my location.after these two file merge in to one avi format file.in the final output file audio run first and video take delay. how to fix it. I used ffmpeg.exe for merge.


are there many system for capture audio and the video in one time without separate capture in c# application?

What I have tried:

here is the merge method.

private void mergefile(string wavefilepath, string videofilepath)
        {
            string Path_FFMPEG = Application.StartupPath + "\\ffmpeg.exe";
            string Wavefile = wavefilepath;
            string video1 = videofilepath;
            //string file = @"D:\Developments\video\text.txt";
            string strResult = @"C:\Users\aa\Desktop\video\Test1output.avi";

            System.Diagnostics.Process proc = new System.Diagnostics.Process();

            try
            {
                //ffmpeg -i clip.mp4 -itsoffset 0.150 -i clip.mp4 -vcodec copy -acodec copy -map 0:0 -map 1:1 output.mp4
               // proc.StartInfo.Arguments = string.Format("-i {0} -itsoffset 0.000 -i {1} -vcodec copy -acodec copy -map 0:0 -map 1:0 {2}", video1, Wavefile, strResult);
                proc.StartInfo.Arguments = string.Format("-i {0} -i {1} -acodec copy -vcodec copy {2}", Wavefile, video1, strResult);
                proc.StartInfo.UseShellExecute = false;
                proc.StartInfo.CreateNoWindow = false;
                proc.StartInfo.RedirectStandardOutput = true;
                proc.StartInfo.RedirectStandardError = true;
                proc.StartInfo.FileName = Path_FFMPEG;
                proc.Start();

                string StdOutVideo = proc.StandardOutput.ReadToEnd();
                string StdErrVideo = proc.StandardError.ReadToEnd();
            }
            catch { }
            finally
            {
                proc.WaitForExit();
                proc.Close();
            }
            
        }