使用FFmpeg音视频格式转换

Download link: FFmpeg Builds

// ffmpeg -i input.avi -b:v 640k output.mp4
private void convert_Click(object sender, EventArgs e)
{
    Process p = new Process();
    // the full path of ffmpeg.exe
    p.StartInfo.FileName = @"D:\ffmpeg\ffmpeg\bin\ffmpeg.exe";
    // set the argument
    // inputPath.Text: the existing swf location, such as "D:\1.swf"
    // savePath.Text: the new mp4 location, such as "D:\1.mp4"
    p.StartInfo.Arguments = "-i " + inputPath.Text + " " + savePath.Text;
    p.Start();
    if (p.HasExited)
    {
        p.Kill();
    }
}