Update the ThrowIfExitCodeNotZero() to check the exit code before handling cancellation.

This preserves the original semantics and contract (throw only if the ffprobe exits with a non-zero code).

FFMpegCore.Test/VideoTest.cs

@@ -82,40 +82,6 @@ public class VideoTest
         Assert.IsTrue(success);
     }
 
-    [TestMethod]
-    [Timeout(BaseTimeoutMilliseconds, CooperativeCancellation = true)]
-    public async Task Video_MetadataBuilder()
-    {
-        using var outputFile = new TemporaryFile($"out{VideoType.Mp4.Extension}");
-
-        await FFMpegArguments
-            .FromFileInput(TestResources.WebmVideo)
-            .AddMetaData(FFMetadataBuilder.Empty()
-                .WithTag("title", "noname")
-                .WithTag("artist", "unknown")
-                .WithChapter("Chapter 1", 1.1)
-                .WithChapter("Chapter 2", 1.23))
-            .OutputToFile(outputFile, false, opt => opt
-                .WithVideoCodec(VideoCodec.LibX264))
-            .CancellableThrough(TestContext.CancellationToken)
-            .ProcessAsynchronously();
-
-        var analysis = await FFProbe.AnalyseAsync(outputFile, cancellationToken: TestContext.CancellationToken);
-        Assert.IsTrue(analysis.Format.Tags!.TryGetValue("title", out var title));
-        Assert.IsTrue(analysis.Format.Tags!.TryGetValue("artist", out var artist));
-        Assert.AreEqual("noname", title);
-        Assert.AreEqual("unknown", artist);
-
-        Assert.HasCount(2, analysis.Chapters);
-        Assert.AreEqual("Chapter 1", analysis.Chapters.First().Title);
-        Assert.AreEqual(1.1, analysis.Chapters.First().Duration.TotalSeconds);
-        Assert.AreEqual(1.1, analysis.Chapters.First().End.TotalSeconds);
-
-        Assert.AreEqual("Chapter 2", analysis.Chapters.Last().Title);
-        Assert.AreEqual(1.23, analysis.Chapters.Last().Duration.TotalSeconds);
-        Assert.AreEqual(1.1 + 1.23, analysis.Chapters.Last().End.TotalSeconds);
-    }
-
     [TestMethod]
     [Timeout(BaseTimeoutMilliseconds, CooperativeCancellation = true)]
     public void Video_ToH265_MKV_Args()

FFMpegCore/FFMetadataInputArgument.cs

@@ -1,62 +0,0 @@
-using System.Text;
-
-namespace FFMpegCore;
-
-public class FFMetadataBuilder
-{
-    private Dictionary<string, string> Tags { get; } = new();
-    private List<FFMetadataChapter> Chapters { get; } = [];
-
-    public static FFMetadataBuilder Empty()
-    {
-        return new FFMetadataBuilder();
-    }
-
-    public FFMetadataBuilder WithTag(string key, string value)
-    {
-        Tags.Add(key, value);
-        return this;
-    }
-
-    public FFMetadataBuilder WithChapter(string title, long durationMs)
-    {
-        Chapters.Add(new FFMetadataChapter(title, durationMs));
-        return this;
-    }
-
-    public FFMetadataBuilder WithChapter(string title, double durationSeconds)
-    {
-        Chapters.Add(new FFMetadataChapter(title, Convert.ToInt64(durationSeconds * 1000)));
-        return this;
-    }
-
-    public string GetMetadataFileContent()
-    {
-        var sb = new StringBuilder();
-        sb.AppendLine(";FFMETADATA1");
-
-        foreach (var tag in Tags)
-        {
-            sb.AppendLine($"{tag.Key}={tag.Value}");
-        }
-
-        long totalDurationMs = 0;
-        foreach (var chapter in Chapters)
-        {
-            sb.AppendLine("[CHAPTER]");
-            sb.AppendLine("TIMEBASE=1/1000");
-            sb.AppendLine($"START={totalDurationMs}");
-            sb.AppendLine($"END={totalDurationMs + chapter.DurationMs}");
-            sb.AppendLine($"title={chapter.Title}");
-            totalDurationMs += chapter.DurationMs;
-        }
-
-        return sb.ToString();
-    }
-
-    private class FFMetadataChapter(string title, long durationMs)
-    {
-        public string Title { get; } = title;
-        public long DurationMs { get; } = durationMs;
-    }
-}

FFMpegCore/FFMpeg/FFMpegArguments.cs

@@ -109,11 +109,6 @@ public sealed class FFMpegArguments : FFMpegArgumentsBase
         return WithInput(new MetaDataArgument(content), addArguments);
     }
 
-    public FFMpegArguments AddMetaData(FFMetadataBuilder metaDataBuilder, Action<FFMpegArgumentOptions>? addArguments = null)
-    {
-        return WithInput(new MetaDataArgument(metaDataBuilder.GetMetadataFileContent()), addArguments);
-    }
-
     public FFMpegArguments AddMetaData(IReadOnlyMetaData metaData, Action<FFMpegArgumentOptions>? addArguments = null)
     {
         return WithInput(new MetaDataArgument(MetaDataSerializer.Instance.Serialize(metaData)), addArguments);

FFMpegCore/FFProbe/FFProbe.cs

@@ -84,8 +84,7 @@ public static class FFProbe
 
         var instance = PrepareStreamAnalysisInstance(filePath, ffOptions ?? GlobalFFOptions.Current, customArguments);
         var result = await instance.StartAndWaitForExitAsync(cancellationToken).ConfigureAwait(false);
-        cancellationToken.ThrowIfCancellationRequested();
-        ThrowIfExitCodeNotZero(result);
+        ThrowIfExitCodeNotZero(result, cancellationToken);
 
         return ParseOutput(result);
     }
@@ -124,8 +123,7 @@ public static class FFProbe
     {
         var instance = PrepareStreamAnalysisInstance(uri.AbsoluteUri, ffOptions ?? GlobalFFOptions.Current, customArguments);
         var result = await instance.StartAndWaitForExitAsync(cancellationToken).ConfigureAwait(false);
-        cancellationToken.ThrowIfCancellationRequested();
-        ThrowIfExitCodeNotZero(result);
+        ThrowIfExitCodeNotZero(result, cancellationToken);
 
         return ParseOutput(result);
     }
@@ -152,8 +150,7 @@ public static class FFProbe
         }
 
         var result = await task.ConfigureAwait(false);
-        cancellationToken.ThrowIfCancellationRequested();
-        ThrowIfExitCodeNotZero(result);
+        ThrowIfExitCodeNotZero(result, cancellationToken);
 
         pipeArgument.Post();
         return ParseOutput(result);
@@ -215,10 +212,13 @@ public static class FFProbe
         }
     }
 
-    private static void ThrowIfExitCodeNotZero(IProcessResult result)
+    private static void ThrowIfExitCodeNotZero(IProcessResult result, CancellationToken cancellationToken = default)
     {
         if (result.ExitCode != 0)
         {
+            // if cancellation requested, then we are not interested in the exit code, just throw the cancellation exception
+            // to get consistent and expected behavior.
+            cancellationToken.ThrowIfCancellationRequested();
             var message = $"ffprobe exited with non-zero exit-code ({result.ExitCode} - {string.Join("\n", result.ErrorData)})";
             throw new FFMpegException(FFMpegExceptionType.Process, message, null, string.Join("\n", result.ErrorData));
         }