Working version

Services/MediaProbe.cs

@@ -0,0 +1,49 @@
+using System.Globalization;
+using System.IO;
+
+namespace AmigaDB.VideoRenderer.Services;
+
+internal sealed class MediaProbe
+{
+    private readonly ProcessRunner _runner;
+    private readonly Action<string>? _log;
+
+    public MediaProbe(ProcessRunner runner, Action<string>? log)
+    {
+        _runner = runner;
+        _log = log;
+    }
+
+    public async Task<double> ProbeDurationAsync(ToolPaths tools, string input, CancellationToken token)
+    {
+        using FfmpegLibraryProbe? libraryProbe = CreateLibraryProbe(tools);
+        if (libraryProbe is not null)
+            return libraryProbe.ProbeDuration(input);
+
+        string output = await _runner.RunAsync(tools.Ffprobe,
+            ["-v", "error", "-show_entries", "format=duration", "-of", "default=nk=1:nw=1", input],
+            null, null, token);
+        return double.Parse(output.Trim(), CultureInfo.InvariantCulture);
+    }
+
+    public async Task<bool> HasAudioAsync(ToolPaths tools, string input, CancellationToken token)
+    {
+        using FfmpegLibraryProbe? libraryProbe = CreateLibraryProbe(tools);
+        if (libraryProbe is not null)
+            return libraryProbe.HasAudio(input);
+
+        string output = await _runner.RunAsync(tools.Ffprobe,
+            ["-v", "error", "-select_streams", "a", "-show_entries", "stream=index", "-of", "csv=p=0", input],
+            null, null, token);
+        return !string.IsNullOrWhiteSpace(output);
+    }
+
+    private FfmpegLibraryProbe? CreateLibraryProbe(ToolPaths tools)
+    {
+        if (!FfmpegLibraryProbe.TryCreate(tools.Ffmpeg, out FfmpegLibraryProbe? probe))
+            return null;
+
+        _log?.Invoke($"Using FFmpeg shared libraries for media probing from '{Path.GetDirectoryName(tools.Ffmpeg)}'.");
+        return probe;
+    }
+}