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using System;
using System.IO;
using Jellyfin.MediaEncoding.Keyframes.FfProbe;
using Jellyfin.MediaEncoding.Keyframes.FfTool;
using Jellyfin.MediaEncoding.Keyframes.Matroska;
using Microsoft.Extensions.Logging;
namespace Jellyfin.MediaEncoding.Keyframes
{
/// <summary>
/// Manager class for the set of keyframe extractors.
/// </summary>
public class KeyframeExtractor
{
private readonly ILogger<KeyframeExtractor> _logger;
/// <summary>
/// Initializes a new instance of the <see cref="KeyframeExtractor"/> class.
/// </summary>
/// <param name="logger">An instance of the <see cref="ILogger{KeyframeExtractor}"/> interface.</param>
public KeyframeExtractor(ILogger<KeyframeExtractor> logger)
{
_logger = logger;
}
/// <summary>
/// Extracts the keyframe positions from a video file.
/// </summary>
/// <param name="filePath">Absolute file path to the media file.</param>
/// <param name="ffProbePath">Absolute file path to the ffprobe executable.</param>
/// <param name="ffToolPath">Absolute file path to the fftool executable.</param>
/// <returns>An instance of <see cref="KeyframeData"/>.</returns>
public KeyframeData GetKeyframeData(string filePath, string ffProbePath, string ffToolPath)
{
var extension = Path.GetExtension(filePath);
if (string.Equals(extension, ".mkv", StringComparison.OrdinalIgnoreCase))
{
try
{
return MatroskaKeyframeExtractor.GetKeyframeData(filePath);
}
catch (InvalidOperationException ex)
{
_logger.LogError(ex, "{MatroskaKeyframeExtractor} failed to extract keyframes", nameof(MatroskaKeyframeExtractor));
}
}
if (!string.IsNullOrEmpty(ffToolPath))
{
return FfToolKeyframeExtractor.GetKeyframeData(ffToolPath, filePath);
}
return FfProbeKeyframeExtractor.GetKeyframeData(ffProbePath, filePath);
}
}
}
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