fix mpegts script loading (#2610)

CHANGELOG.md

@@ -22,6 +22,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - This allows using something other than ffmpeg (e.g. streamlink) to concatenate segments back together when using MPEG-TS streaming mode
   - Scripts live in config / scripts / mpegts
   - Each script gets its own subfolder which contains an `mpegts.yml` definition and corresponding windows (powershell) and linux (bash) scripts
+  - The global MPEG-TS script can be configured in **Settings** > **FFmpeg** > **Default MPEG-TS Script**
 
 ### Fixed
 - Fix HLS Direct playback with Jellyfin 10.11

ErsatzTV.Core/FFmpeg/FFmpegLibraryProcessService.cs

@@ -849,10 +849,8 @@ public class FFmpegLibraryProcessService : IFFmpegProcessService
             .GetValue<string>(ConfigElementKey.FFmpegDefaultMpegTsScript, cancellationToken)
             .IfNoneAsync("Default");
         List<MpegTsScript> allScripts = _mpegTsScriptService.GetScripts();
-        foreach (var script in allScripts.Where(s => string.Equals(
-                     s.Name,
-                     defaultScript,
-                     StringComparison.OrdinalIgnoreCase)))
+        Option<MpegTsScript> maybeScript = Optional(allScripts.Find(s => s.Id == defaultScript));
+        foreach (var script in maybeScript)
         {
             Option<Command> maybeCommand = await _mpegTsScriptService.Execute(
                 script,
@@ -865,6 +863,11 @@ public class FFmpegLibraryProcessService : IFFmpegProcessService
             }
         }
 
+        if (maybeScript.IsNone)
+        {
+            _logger.LogWarning("Unable to locate MPEG-TS Script in folder {Id}", defaultScript);
+        }
+
         IPipelineBuilder pipelineBuilder = await _pipelineBuilderFactory.GetBuilder(
             HardwareAccelerationMode.None,
             Option<VideoInputFile>.None,