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Hello, I am trying to make a program that copies a specific video until the total length is longer than a specified amount. I need help trying to join them.
Here is my joining code.

// videos is a List<string> containing a list of every single copied video's path.
// dir is the current directory returned by Directory.GetCurrentDirectory()
// outputVideoSelect.FileName is a user specified output file
using Splicer; 
using Splicer.Timeline;
using Splicer.Renderer;

            using (ITimeline timeline = new DefaultTimeline())
                IGroup group = timeline.AddVideoGroup(32, 720, 576);
                for (int v = 1; v < videos.ToArray().Length; v++) {

                using (AviFileRenderer renderer = new AviFileRenderer(timeline, $"{dir}\\output.mp4"))
            File.Move($"{dir}\\output.mp4", $"{outputVideoSelect.FileName}");

What I have tried:

FFMPEG (no luck)
CMD's copy function (no luck)
Using a for loop to make my list of videos to render using Splicer (program throws
An exception of type 'System.Runtime.InteropServices.COMException' occurred in DirectShowLib-2005.dll but was not handled in user code
The filename, directory name, or volume label syntax is incorrect.
Richard MacCutchan 1-Mar-22 10:18am    
Which line causes the error and what are the file name details?
j ongamer13 1-Mar-22 10:57am    
group.AddTrack().AddVideo(videos[v]); causes the error. videos[v] should return something like C:/Users/User/AppData/Local/Temp/MovieMakerTempFolder/5.mp4
Richard MacCutchan 1-Mar-22 11:26am    
Fine, but what exactly does it return? You cannot solve code problems by guessing what might be happening, you need to know the complete details.
j ongamer13 1-Mar-22 11:36am    
It returns D:\Temp\/MovieMakerTemp\2.mp4 I think I did some slashes wrong
Edit: For clarification, D:\Temp\ is my temp folder
Richard MacCutchan 1-Mar-22 11:39am    

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