620 lines
21 KiB
C#
620 lines
21 KiB
C#
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Logging;
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using MediaBrowser.Model.MediaInfo;
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using System;
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using System.Collections.Concurrent;
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using System.Diagnostics;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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namespace MediaBrowser.MediaEncoding.Subtitles
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{
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public class SubtitleEncoder : ISubtitleEncoder
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{
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private readonly ILibraryManager _libraryManager;
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private readonly ILogger _logger;
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private readonly IApplicationPaths _appPaths;
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private readonly IFileSystem _fileSystem;
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private readonly IMediaEncoder _mediaEncoder;
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public SubtitleEncoder(ILibraryManager libraryManager, ILogger logger, IApplicationPaths appPaths, IFileSystem fileSystem, IMediaEncoder mediaEncoder)
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{
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_libraryManager = libraryManager;
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_logger = logger;
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_appPaths = appPaths;
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_fileSystem = fileSystem;
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_mediaEncoder = mediaEncoder;
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}
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private string SubtitleCachePath
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{
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get
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{
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return Path.Combine(_appPaths.CachePath, "subtitles");
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}
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}
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public async Task<Stream> ConvertSubtitles(Stream stream,
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string inputFormat,
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string outputFormat,
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CancellationToken cancellationToken)
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{
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var ms = new MemoryStream();
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try
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{
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if (string.Equals(inputFormat, outputFormat, StringComparison.OrdinalIgnoreCase))
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{
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await stream.CopyToAsync(ms, 81920, cancellationToken).ConfigureAwait(false);
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}
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else
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{
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var trackInfo = await GetTrackInfo(stream, inputFormat, cancellationToken).ConfigureAwait(false);
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var writer = GetWriter(outputFormat);
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writer.Write(trackInfo, ms, cancellationToken);
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}
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ms.Position = 0;
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}
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catch
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{
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ms.Dispose();
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throw;
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}
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return ms;
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}
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public async Task<Stream> GetSubtitles(string itemId,
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string mediaSourceId,
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int subtitleStreamIndex,
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string outputFormat,
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CancellationToken cancellationToken)
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{
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var subtitle = await GetSubtitleStream(itemId, mediaSourceId, subtitleStreamIndex, cancellationToken)
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.ConfigureAwait(false);
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using (var stream = subtitle.Item1)
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{
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var inputFormat = subtitle.Item2;
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return await ConvertSubtitles(stream, inputFormat, outputFormat, cancellationToken).ConfigureAwait(false);
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}
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}
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private async Task<Tuple<Stream, string>> GetSubtitleStream(string itemId,
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string mediaSourceId,
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int subtitleStreamIndex,
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CancellationToken cancellationToken)
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{
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var item = (Video)_libraryManager.GetItemById(new Guid(itemId));
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var mediaSource = item.GetMediaSources(false)
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.First(i => string.Equals(i.Id, mediaSourceId));
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var subtitleStream = mediaSource.MediaStreams
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.First(i => i.Type == MediaStreamType.Subtitle && i.Index == subtitleStreamIndex);
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var inputType = mediaSource.LocationType == LocationType.Remote ? InputType.Url : InputType.File;
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var inputFiles = new[] { mediaSource.Path };
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if (mediaSource.VideoType.HasValue)
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{
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if (mediaSource.VideoType.Value == VideoType.BluRay)
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{
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inputType = InputType.Bluray;
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var mediaSourceItem = (Video)_libraryManager.GetItemById(new Guid(mediaSourceId));
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inputFiles = mediaSourceItem.GetPlayableStreamFiles().ToArray();
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}
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else if (mediaSource.VideoType.Value == VideoType.Dvd)
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{
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inputType = InputType.Dvd;
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var mediaSourceItem = (Video)_libraryManager.GetItemById(new Guid(mediaSourceId));
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inputFiles = mediaSourceItem.GetPlayableStreamFiles().ToArray();
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}
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}
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var fileInfo = await GetReadableFile(mediaSource.Path, inputFiles, inputType, subtitleStream, cancellationToken).ConfigureAwait(false);
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var stream = File.OpenRead(fileInfo.Item1);
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return new Tuple<Stream, string>(stream, fileInfo.Item2);
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}
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private async Task<Tuple<string, string>> GetReadableFile(string mediaPath,
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string[] inputFiles,
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InputType type,
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MediaStream subtitleStream,
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CancellationToken cancellationToken)
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{
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if (!subtitleStream.IsExternal)
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{
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// Extract
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var outputPath = GetSubtitleCachePath(mediaPath, subtitleStream.Index, ".ass");
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await ExtractTextSubtitle(inputFiles, type, subtitleStream.Index, false, outputPath, cancellationToken)
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.ConfigureAwait(false);
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return new Tuple<string, string>(outputPath, "ass");
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}
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var currentFormat = (Path.GetExtension(subtitleStream.Path) ?? subtitleStream.Codec)
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.TrimStart('.');
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if (GetReader(currentFormat, false) == null)
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{
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// Convert
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var outputPath = GetSubtitleCachePath(mediaPath, subtitleStream.Index, ".ass");
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await ConvertTextSubtitleToAss(subtitleStream.Path, outputPath, subtitleStream.Language, cancellationToken)
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.ConfigureAwait(false);
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return new Tuple<string, string>(outputPath, "ass");
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}
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return new Tuple<string, string>(subtitleStream.Path, currentFormat);
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}
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private async Task<SubtitleTrackInfo> GetTrackInfo(Stream stream,
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string inputFormat,
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CancellationToken cancellationToken)
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{
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var reader = GetReader(inputFormat, true);
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return reader.Parse(stream, cancellationToken);
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}
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private ISubtitleParser GetReader(string format, bool throwIfMissing)
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{
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if (string.IsNullOrEmpty(format))
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{
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throw new ArgumentNullException("format");
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}
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if (string.Equals(format, SubtitleFormat.SRT, StringComparison.OrdinalIgnoreCase))
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{
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return new SrtParser();
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}
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if (string.Equals(format, SubtitleFormat.SSA, StringComparison.OrdinalIgnoreCase) ||
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string.Equals(format, SubtitleFormat.ASS, StringComparison.OrdinalIgnoreCase))
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{
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return new SsaParser();
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}
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if (throwIfMissing)
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{
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throw new ArgumentException("Unsupported format: " + format);
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}
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return null;
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}
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private ISubtitleWriter GetWriter(string format)
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{
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if (string.IsNullOrEmpty(format))
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{
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throw new ArgumentNullException("format");
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}
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if (string.Equals(format, SubtitleFormat.VTT, StringComparison.OrdinalIgnoreCase))
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{
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return new VttWriter();
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}
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throw new ArgumentException("Unsupported format: " + format);
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}
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/// <summary>
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/// The _semaphoreLocks
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/// </summary>
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private readonly ConcurrentDictionary<string, SemaphoreSlim> _semaphoreLocks =
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new ConcurrentDictionary<string, SemaphoreSlim>();
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/// <summary>
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/// Gets the lock.
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/// </summary>
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/// <param name="filename">The filename.</param>
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/// <returns>System.Object.</returns>
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private SemaphoreSlim GetLock(string filename)
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{
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return _semaphoreLocks.GetOrAdd(filename, key => new SemaphoreSlim(1, 1));
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}
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/// <summary>
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/// Converts the text subtitle to ass.
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/// </summary>
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/// <param name="inputPath">The input path.</param>
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/// <param name="outputPath">The output path.</param>
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/// <param name="language">The language.</param>
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/// <param name="cancellationToken">The cancellation token.</param>
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/// <returns>Task.</returns>
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public async Task ConvertTextSubtitleToAss(string inputPath, string outputPath, string language,
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CancellationToken cancellationToken)
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{
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var semaphore = GetLock(outputPath);
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await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
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try
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{
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if (!File.Exists(outputPath))
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{
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await ConvertTextSubtitleToAssInternal(inputPath, outputPath, language).ConfigureAwait(false);
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}
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}
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finally
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{
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semaphore.Release();
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}
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}
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/// <summary>
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/// Converts the text subtitle to ass.
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/// </summary>
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/// <param name="inputPath">The input path.</param>
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/// <param name="outputPath">The output path.</param>
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/// <param name="language">The language.</param>
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/// <returns>Task.</returns>
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/// <exception cref="System.ArgumentNullException">inputPath
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/// or
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/// outputPath</exception>
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/// <exception cref="System.ApplicationException"></exception>
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private async Task ConvertTextSubtitleToAssInternal(string inputPath, string outputPath, string language)
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{
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if (string.IsNullOrEmpty(inputPath))
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{
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throw new ArgumentNullException("inputPath");
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}
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if (string.IsNullOrEmpty(outputPath))
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{
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throw new ArgumentNullException("outputPath");
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}
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var encodingParam = string.IsNullOrEmpty(language)
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? string.Empty
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: _mediaEncoder.GetSubtitleLanguageEncodingParam(inputPath, language);
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if (!string.IsNullOrEmpty(encodingParam))
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{
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encodingParam = " -sub_charenc " + encodingParam;
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}
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var process = new Process
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{
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StartInfo = new ProcessStartInfo
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{
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RedirectStandardOutput = false,
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RedirectStandardError = true,
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CreateNoWindow = true,
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UseShellExecute = false,
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FileName = _mediaEncoder.EncoderPath,
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Arguments =
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string.Format("{0} -i \"{1}\" -c:s ass \"{2}\"", encodingParam, inputPath, outputPath),
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WindowStyle = ProcessWindowStyle.Hidden,
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ErrorDialog = false
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}
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};
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_logger.Debug("{0} {1}", process.StartInfo.FileName, process.StartInfo.Arguments);
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var logFilePath = Path.Combine(_appPaths.LogDirectoryPath, "ffmpeg-sub-convert-" + Guid.NewGuid() + ".txt");
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Directory.CreateDirectory(Path.GetDirectoryName(logFilePath));
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var logFileStream = _fileSystem.GetFileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read,
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true);
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try
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{
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process.Start();
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}
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catch (Exception ex)
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{
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logFileStream.Dispose();
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_logger.ErrorException("Error starting ffmpeg", ex);
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throw;
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}
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var logTask = process.StandardError.BaseStream.CopyToAsync(logFileStream);
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var ranToCompletion = process.WaitForExit(60000);
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if (!ranToCompletion)
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{
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try
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{
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_logger.Info("Killing ffmpeg subtitle conversion process");
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process.Kill();
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process.WaitForExit(1000);
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await logTask.ConfigureAwait(false);
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}
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catch (Exception ex)
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{
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_logger.ErrorException("Error killing subtitle conversion process", ex);
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}
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finally
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{
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logFileStream.Dispose();
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}
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}
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var exitCode = ranToCompletion ? process.ExitCode : -1;
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process.Dispose();
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var failed = false;
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if (exitCode == -1)
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{
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failed = true;
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if (File.Exists(outputPath))
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{
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try
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{
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_logger.Info("Deleting converted subtitle due to failure: ", outputPath);
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File.Delete(outputPath);
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}
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catch (IOException ex)
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{
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_logger.ErrorException("Error deleting converted subtitle {0}", ex, outputPath);
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}
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}
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}
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else if (!File.Exists(outputPath))
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{
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failed = true;
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}
|
|||
|
|
|
|||
|
|
if (failed)
|
|||
|
|
{
|
|||
|
|
var msg = string.Format("ffmpeg subtitle converted failed for {0}", inputPath);
|
|||
|
|
|
|||
|
|
_logger.Error(msg);
|
|||
|
|
|
|||
|
|
throw new ApplicationException(msg);
|
|||
|
|
}
|
|||
|
|
await SetAssFont(outputPath).ConfigureAwait(false);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Extracts the text subtitle.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="inputFiles">The input files.</param>
|
|||
|
|
/// <param name="type">The type.</param>
|
|||
|
|
/// <param name="subtitleStreamIndex">Index of the subtitle stream.</param>
|
|||
|
|
/// <param name="copySubtitleStream">if set to true, copy stream instead of converting.</param>
|
|||
|
|
/// <param name="outputPath">The output path.</param>
|
|||
|
|
/// <param name="cancellationToken">The cancellation token.</param>
|
|||
|
|
/// <returns>Task.</returns>
|
|||
|
|
/// <exception cref="System.ArgumentException">Must use inputPath list overload</exception>
|
|||
|
|
private async Task ExtractTextSubtitle(string[] inputFiles, InputType type, int subtitleStreamIndex,
|
|||
|
|
bool copySubtitleStream, string outputPath, CancellationToken cancellationToken)
|
|||
|
|
{
|
|||
|
|
var semaphore = GetLock(outputPath);
|
|||
|
|
|
|||
|
|
await semaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
|
|||
|
|
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
if (!File.Exists(outputPath))
|
|||
|
|
{
|
|||
|
|
await ExtractTextSubtitleInternal(_mediaEncoder.GetInputArgument(inputFiles, type), subtitleStreamIndex,
|
|||
|
|
copySubtitleStream, outputPath, cancellationToken).ConfigureAwait(false);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
finally
|
|||
|
|
{
|
|||
|
|
semaphore.Release();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Extracts the text subtitle.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="inputPath">The input path.</param>
|
|||
|
|
/// <param name="subtitleStreamIndex">Index of the subtitle stream.</param>
|
|||
|
|
/// <param name="copySubtitleStream">if set to true, copy stream instead of converting.</param>
|
|||
|
|
/// <param name="outputPath">The output path.</param>
|
|||
|
|
/// <param name="cancellationToken">The cancellation token.</param>
|
|||
|
|
/// <returns>Task.</returns>
|
|||
|
|
/// <exception cref="System.ArgumentNullException">inputPath
|
|||
|
|
/// or
|
|||
|
|
/// outputPath
|
|||
|
|
/// or
|
|||
|
|
/// cancellationToken</exception>
|
|||
|
|
/// <exception cref="System.ApplicationException"></exception>
|
|||
|
|
private async Task ExtractTextSubtitleInternal(string inputPath, int subtitleStreamIndex,
|
|||
|
|
bool copySubtitleStream, string outputPath, CancellationToken cancellationToken)
|
|||
|
|
{
|
|||
|
|
if (string.IsNullOrEmpty(inputPath))
|
|||
|
|
{
|
|||
|
|
throw new ArgumentNullException("inputPath");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (string.IsNullOrEmpty(outputPath))
|
|||
|
|
{
|
|||
|
|
throw new ArgumentNullException("outputPath");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
string processArgs = string.Format("-i {0} -map 0:{1} -an -vn -c:s ass \"{2}\"", inputPath,
|
|||
|
|
subtitleStreamIndex, outputPath);
|
|||
|
|
|
|||
|
|
if (copySubtitleStream)
|
|||
|
|
{
|
|||
|
|
processArgs = string.Format("-i {0} -map 0:{1} -an -vn -c:s copy \"{2}\"", inputPath,
|
|||
|
|
subtitleStreamIndex, outputPath);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var process = new Process
|
|||
|
|
{
|
|||
|
|
StartInfo = new ProcessStartInfo
|
|||
|
|
{
|
|||
|
|
CreateNoWindow = true,
|
|||
|
|
UseShellExecute = false,
|
|||
|
|
|
|||
|
|
RedirectStandardOutput = false,
|
|||
|
|
RedirectStandardError = true,
|
|||
|
|
|
|||
|
|
FileName = _mediaEncoder.EncoderPath,
|
|||
|
|
Arguments = processArgs,
|
|||
|
|
WindowStyle = ProcessWindowStyle.Hidden,
|
|||
|
|
ErrorDialog = false
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
_logger.Debug("{0} {1}", process.StartInfo.FileName, process.StartInfo.Arguments);
|
|||
|
|
|
|||
|
|
var logFilePath = Path.Combine(_appPaths.LogDirectoryPath, "ffmpeg-sub-extract-" + Guid.NewGuid() + ".txt");
|
|||
|
|
Directory.CreateDirectory(Path.GetDirectoryName(logFilePath));
|
|||
|
|
|
|||
|
|
var logFileStream = _fileSystem.GetFileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read,
|
|||
|
|
true);
|
|||
|
|
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
process.Start();
|
|||
|
|
}
|
|||
|
|
catch (Exception ex)
|
|||
|
|
{
|
|||
|
|
logFileStream.Dispose();
|
|||
|
|
|
|||
|
|
_logger.ErrorException("Error starting ffmpeg", ex);
|
|||
|
|
|
|||
|
|
throw;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
process.StandardError.BaseStream.CopyToAsync(logFileStream);
|
|||
|
|
|
|||
|
|
var ranToCompletion = process.WaitForExit(60000);
|
|||
|
|
|
|||
|
|
if (!ranToCompletion)
|
|||
|
|
{
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
_logger.Info("Killing ffmpeg subtitle extraction process");
|
|||
|
|
|
|||
|
|
process.Kill();
|
|||
|
|
|
|||
|
|
process.WaitForExit(1000);
|
|||
|
|
}
|
|||
|
|
catch (Exception ex)
|
|||
|
|
{
|
|||
|
|
_logger.ErrorException("Error killing subtitle extraction process", ex);
|
|||
|
|
}
|
|||
|
|
finally
|
|||
|
|
{
|
|||
|
|
logFileStream.Dispose();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var exitCode = ranToCompletion ? process.ExitCode : -1;
|
|||
|
|
|
|||
|
|
process.Dispose();
|
|||
|
|
|
|||
|
|
var failed = false;
|
|||
|
|
|
|||
|
|
if (exitCode == -1)
|
|||
|
|
{
|
|||
|
|
failed = true;
|
|||
|
|
|
|||
|
|
if (File.Exists(outputPath))
|
|||
|
|
{
|
|||
|
|
try
|
|||
|
|
{
|
|||
|
|
_logger.Info("Deleting extracted subtitle due to failure: ", outputPath);
|
|||
|
|
File.Delete(outputPath);
|
|||
|
|
}
|
|||
|
|
catch (IOException ex)
|
|||
|
|
{
|
|||
|
|
_logger.ErrorException("Error deleting extracted subtitle {0}", ex, outputPath);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
else if (!File.Exists(outputPath))
|
|||
|
|
{
|
|||
|
|
failed = true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (failed)
|
|||
|
|
{
|
|||
|
|
var msg = string.Format("ffmpeg subtitle extraction failed for {0} to {1}", inputPath, outputPath);
|
|||
|
|
|
|||
|
|
_logger.Error(msg);
|
|||
|
|
|
|||
|
|
throw new ApplicationException(msg);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
var msg = string.Format("ffmpeg subtitle extraction completed for {0} to {1}", inputPath, outputPath);
|
|||
|
|
|
|||
|
|
_logger.Info(msg);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
await SetAssFont(outputPath).ConfigureAwait(false);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// Sets the ass font.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="file">The file.</param>
|
|||
|
|
/// <returns>Task.</returns>
|
|||
|
|
private async Task SetAssFont(string file)
|
|||
|
|
{
|
|||
|
|
_logger.Info("Setting ass font within {0}", file);
|
|||
|
|
|
|||
|
|
string text;
|
|||
|
|
Encoding encoding;
|
|||
|
|
|
|||
|
|
using (var reader = new StreamReader(file, true))
|
|||
|
|
{
|
|||
|
|
encoding = reader.CurrentEncoding;
|
|||
|
|
|
|||
|
|
text = await reader.ReadToEndAsync().ConfigureAwait(false);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
var newText = text.Replace(",Arial,", ",Arial Unicode MS,");
|
|||
|
|
|
|||
|
|
if (!string.Equals(text, newText))
|
|||
|
|
{
|
|||
|
|
using (var writer = new StreamWriter(file, false, encoding))
|
|||
|
|
{
|
|||
|
|
writer.Write(newText);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private string GetSubtitleCachePath(string mediaPath, int subtitleStreamIndex, string outputSubtitleExtension)
|
|||
|
|
{
|
|||
|
|
var ticksParam = string.Empty;
|
|||
|
|
|
|||
|
|
var date = _fileSystem.GetLastWriteTimeUtc(mediaPath);
|
|||
|
|
|
|||
|
|
var filename = (mediaPath + "_" + subtitleStreamIndex.ToString(CultureInfo.InvariantCulture) + "_" + date.Ticks.ToString(CultureInfo.InvariantCulture) + ticksParam).GetMD5() + outputSubtitleExtension;
|
|||
|
|
|
|||
|
|
var prefix = filename.Substring(0, 1);
|
|||
|
|
|
|||
|
|
return Path.Combine(SubtitleCachePath, prefix, filename);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|