// command based out of https://stackoverflow.com/a/48853654/5031684
private string GetFfmpegCommand(List <string> clipPaths, string outputLocation)
{
if (clipPaths == null || clipPaths.Count == 0 || outputLocation == null)
{
throw new ArgumentNullException();
}
string command = $"{UtilMethods.GetSolutionPath()}ffmpeg ";
foreach (string clip in clipPaths)
{
command += $"-i \"{clip}\" ";
}
command += "-filter_complex \"";
for (int i = 0; i < clipPaths.Count; i++)
{
//command += $"[{i}:v]scale=1920:1080:force_original_aspect_ratio=1[v{i}]; ";
command += $"[{i}:v]scale=1920:1080,setdar=16/9[v{i}]; ";
}
for (int i = 0; i < clipPaths.Count; i++)
{
command += $"[v{i}][{i}:a]";
}
command += $"concat=n={clipPaths.Count}:v=1:a=1[v][a]\" -map [v] -map [a] {outputLocation}";
return(command);
}
