diff --git a/BizHawk.Client.EmuHawk/AVOut/FFmpegWriter.cs b/BizHawk.Client.EmuHawk/AVOut/FFmpegWriter.cs
index 2a1cee9ad9..8806900b34 100644
--- a/BizHawk.Client.EmuHawk/AVOut/FFmpegWriter.cs
+++ b/BizHawk.Client.EmuHawk/AVOut/FFmpegWriter.cs
@@ -91,7 +91,7 @@ namespace BizHawk.Client.EmuHawk
 				ffmpeg.StartInfo.FileName = "ffmpeg"; // expecting native version to be in path
 #endif
 
-				string filename = $"{_baseName}_{_segment,4:D4}{_ext}";
+				string filename = _baseName + (_segment > 0 ? $"_{_segment}" : "") + _ext;
 				_ffmpeg.StartInfo.Arguments = string.Format("-y -f nut -i - {1} \"{0}\"", filename, _token.Commandline);
 				_ffmpeg.StartInfo.CreateNoWindow = true;