Refactor and add scheduled task

src/Jellyfin.MediaEncoding.Hls/Extractors/FfProbeKeyframeExtractor.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
+using Emby.Naming.Common;
+using Jellyfin.Extensions;
+using Jellyfin.MediaEncoding.Keyframes;
+using MediaBrowser.Controller.MediaEncoding;
+using Microsoft.Extensions.Logging;
+using Extractor = Jellyfin.MediaEncoding.Keyframes.FfProbe.FfProbeKeyframeExtractor;
+
+namespace Jellyfin.MediaEncoding.Hls.Extractors;
+
+/// <inheritdoc />
+public class FfProbeKeyframeExtractor : IKeyframeExtractor
+{
+    private readonly IMediaEncoder _mediaEncoder;
+    private readonly NamingOptions _namingOptions;
+    private readonly ILogger<FfProbeKeyframeExtractor> _logger;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="FfProbeKeyframeExtractor"/> class.
+    /// </summary>
+    /// <param name="mediaEncoder">An instance of the <see cref="IMediaEncoder"/> interface.</param>
+    /// <param name="namingOptions">An instance of <see cref="NamingOptions"/>.</param>
+    /// <param name="logger">An instance of the <see cref="ILogger{FfprobeKeyframeExtractor}"/> interface.</param>
+    public FfProbeKeyframeExtractor(IMediaEncoder mediaEncoder, NamingOptions namingOptions, ILogger<FfProbeKeyframeExtractor> logger)
+    {
+        _mediaEncoder = mediaEncoder;
+        _namingOptions = namingOptions;
+        _logger = logger;
+    }
+
+    /// <inheritdoc />
+    public bool IsMetadataBased => false;
+
+    /// <inheritdoc />
+    public bool TryExtractKeyframes(string filePath, [NotNullWhen(true)] out KeyframeData? keyframeData)
+    {
+        if (!_namingOptions.VideoFileExtensions.Contains(Path.GetExtension(filePath.AsSpan()), StringComparison.OrdinalIgnoreCase))
+        {
+            keyframeData = null;
+            return false;
+        }
+
+        try
+        {
+            keyframeData = Extractor.GetKeyframeData(_mediaEncoder.ProbePath, filePath);
+            return keyframeData.KeyframeTicks.Count > 0;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Extracting keyframes from {FilePath} using ffprobe failed", filePath);
+        }
+
+        keyframeData = null;
+        return false;
+    }
+}

src/Jellyfin.MediaEncoding.Hls/Extractors/IKeyframeExtractor.cs

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+using System;
+using System.Diagnostics.CodeAnalysis;
+using Jellyfin.MediaEncoding.Keyframes;
+
+namespace Jellyfin.MediaEncoding.Hls.Extractors;
+
+/// <summary>
+/// Keyframe extractor.
+/// </summary>
+public interface IKeyframeExtractor
+{
+    /// <summary>
+    /// Gets a value indicating whether the extractor is based on container metadata.
+    /// </summary>
+    bool IsMetadataBased { get; }
+
+    /// <summary>
+    /// Attempt to extract keyframes.
+    /// </summary>
+    /// <param name="filePath">The path to the file.</param>
+    /// <param name="keyframeData">The keyframes.</param>
+    /// <returns>A value indicating whether the keyframe extraction was successful.</returns>
+    bool TryExtractKeyframes(string filePath, [NotNullWhen(true)] out KeyframeData? keyframeData);
+}

src/Jellyfin.MediaEncoding.Hls/Extractors/MatroskaKeyframeExtractor.cs

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+using System;
+using System.Diagnostics.CodeAnalysis;
+using Jellyfin.MediaEncoding.Keyframes;
+using Microsoft.Extensions.Logging;
+using Extractor = Jellyfin.MediaEncoding.Keyframes.Matroska.MatroskaKeyframeExtractor;
+
+namespace Jellyfin.MediaEncoding.Hls.Extractors;
+
+/// <inheritdoc />
+public class MatroskaKeyframeExtractor : IKeyframeExtractor
+{
+    private readonly ILogger<MatroskaKeyframeExtractor> _logger;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="MatroskaKeyframeExtractor"/> class.
+    /// </summary>
+    /// <param name="logger">An instance of the <see cref="ILogger{MatroskaKeyframeExtractor}"/> interface.</param>
+    public MatroskaKeyframeExtractor(ILogger<MatroskaKeyframeExtractor> logger)
+    {
+        _logger = logger;
+    }
+
+    /// <inheritdoc />
+    public bool IsMetadataBased => true;
+
+    /// <inheritdoc />
+    public bool TryExtractKeyframes(string filePath, [NotNullWhen(true)] out KeyframeData? keyframeData)
+    {
+        if (filePath.AsSpan().EndsWith(".mkv", StringComparison.OrdinalIgnoreCase))
+        {
+            keyframeData = null;
+            return false;
+        }
+
+        try
+        {
+            keyframeData = Extractor.GetKeyframeData(filePath);
+            return keyframeData.KeyframeTicks.Count > 0;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Extracting keyframes from {FilePath} using matroska metadata failed", filePath);
+        }
+
+        keyframeData = null;
+        return false;
+    }
+}