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using BDInfo;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.MediaInfo;
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using MediaBrowser.Model.Entities;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Threading;
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namespace MediaBrowser.Controller.Providers.MediaInfo
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{
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/// <summary>
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/// Extracts dvd information using VgtMpeg
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/// </summary>
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internal static class BDInfoProvider
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{
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internal static void FetchBdInfo(BaseItem item, string inputPath, FileSystemRepository bdInfoCache, CancellationToken cancellationToken)
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{
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var video = (Video)item;
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// Get the path to the cache file
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var cacheName = item.Id + "_" + item.DateModified.Ticks;
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var cacheFile = bdInfoCache.GetResourcePath(cacheName, ".pb");
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BDInfoResult result;
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try
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{
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result = Kernel.Instance.ProtobufSerializer.DeserializeFromFile<BDInfoResult>(cacheFile);
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}
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catch (FileNotFoundException)
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{
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result = GetBDInfo(inputPath);
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Kernel.Instance.ProtobufSerializer.SerializeToFile(result, cacheFile);
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}
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cancellationToken.ThrowIfCancellationRequested();
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int? currentHeight = null;
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int? currentWidth = null;
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int? currentBitRate = null;
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var videoStream = video.MediaStreams.FirstOrDefault(s => s.Type == MediaStreamType.Video);
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// Grab the values that ffprobe recorded
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if (videoStream != null)
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{
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currentBitRate = videoStream.BitRate;
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currentWidth = videoStream.Width;
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currentHeight = videoStream.Height;
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}
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// Fill video properties from the BDInfo result
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Fetch(video, inputPath, result);
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videoStream = video.MediaStreams.FirstOrDefault(s => s.Type == MediaStreamType.Video);
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// Use the ffprobe values if these are empty
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if (videoStream != null)
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{
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videoStream.BitRate = IsEmpty(videoStream.BitRate) ? currentBitRate : videoStream.BitRate;
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videoStream.Width = IsEmpty(videoStream.Width) ? currentWidth : videoStream.Width;
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videoStream.Height = IsEmpty(videoStream.Height) ? currentHeight : videoStream.Height;
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}
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}
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/// <summary>
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/// Determines whether the specified num is empty.
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/// </summary>
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/// <param name="num">The num.</param>
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/// <returns><c>true</c> if the specified num is empty; otherwise, <c>false</c>.</returns>
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private static bool IsEmpty(int? num)
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{
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return !num.HasValue || num.Value == 0;
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}
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/// <summary>
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/// Fills video properties from the VideoStream of the largest playlist
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/// </summary>
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/// <param name="video">The video.</param>
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/// <param name="inputPath">The input path.</param>
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/// <param name="stream">The stream.</param>
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private static void Fetch(Video video, string inputPath, BDInfoResult stream)
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{
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// Check all input for null/empty/zero
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video.MediaStreams = stream.MediaStreams;
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if (stream.RunTimeTicks.HasValue && stream.RunTimeTicks.Value > 0)
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{
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video.RunTimeTicks = stream.RunTimeTicks;
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}
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video.PlayableStreamFileNames = stream.Files.ToList();
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if (stream.Chapters != null)
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{
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video.Chapters = stream.Chapters.Select(c => new ChapterInfo
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{
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StartPositionTicks = TimeSpan.FromSeconds(c).Ticks
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}).ToList();
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}
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}
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/// <summary>
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/// Gets information about the longest playlist on a bdrom
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/// </summary>
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/// <param name="path">The path.</param>
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/// <returns>VideoStream.</returns>
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private static BDInfoResult GetBDInfo(string path)
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{
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var bdrom = new BDROM(path);
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bdrom.Scan();
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// Get the longest playlist
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var playlist = bdrom.PlaylistFiles.Values.OrderByDescending(p => p.TotalLength).FirstOrDefault(p => p.IsValid);
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var outputStream = new BDInfoResult
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{
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MediaStreams = new List<MediaStream>()
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};
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if (playlist == null)
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{
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return outputStream;
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}
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outputStream.Chapters = playlist.Chapters;
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outputStream.RunTimeTicks = TimeSpan.FromSeconds(playlist.TotalLength).Ticks;
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var mediaStreams = new List<MediaStream> {};
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foreach (var stream in playlist.SortedStreams)
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{
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var videoStream = stream as TSVideoStream;
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if (videoStream != null)
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{
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AddVideoStream(mediaStreams, videoStream);
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continue;
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}
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var audioStream = stream as TSAudioStream;
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if (audioStream != null)
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{
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AddAudioStream(mediaStreams, audioStream);
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continue;
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}
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var textStream = stream as TSTextStream;
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if (textStream != null)
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{
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AddSubtitleStream(mediaStreams, textStream);
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continue;
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}
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var graphicsStream = stream as TSGraphicsStream;
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if (graphicsStream != null)
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{
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AddSubtitleStream(mediaStreams, graphicsStream);
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}
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}
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outputStream.MediaStreams = mediaStreams;
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if (playlist.StreamClips != null && playlist.StreamClips.Any())
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{
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// Get the files in the playlist
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outputStream.Files = playlist.StreamClips.Select(i => i.StreamFile.Name).ToList();
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}
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return outputStream;
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}
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/// <summary>
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/// Adds the video stream.
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/// </summary>
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/// <param name="streams">The streams.</param>
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/// <param name="videoStream">The video stream.</param>
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private static void AddVideoStream(List<MediaStream> streams, TSVideoStream videoStream)
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{
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var mediaStream = new MediaStream
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{
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BitRate = Convert.ToInt32(videoStream.BitRate),
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Width = videoStream.Width,
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Height = videoStream.Height,
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Codec = videoStream.CodecShortName,
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ScanType = videoStream.IsInterlaced ? "interlaced" : "progressive",
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Type = MediaStreamType.Video,
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Index = streams.Count
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};
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if (videoStream.FrameRateDenominator > 0)
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{
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float frameRateEnumerator = videoStream.FrameRateEnumerator;
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float frameRateDenominator = videoStream.FrameRateDenominator;
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mediaStream.AverageFrameRate = mediaStream.RealFrameRate = frameRateEnumerator / frameRateDenominator;
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}
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streams.Add(mediaStream);
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}
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/// <summary>
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/// Adds the audio stream.
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/// </summary>
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/// <param name="streams">The streams.</param>
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/// <param name="audioStream">The audio stream.</param>
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private static void AddAudioStream(List<MediaStream> streams, TSAudioStream audioStream)
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{
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streams.Add(new MediaStream
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{
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BitRate = Convert.ToInt32(audioStream.BitRate),
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Codec = audioStream.CodecShortName,
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Language = audioStream.LanguageCode,
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Channels = audioStream.ChannelCount,
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SampleRate = audioStream.SampleRate,
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Type = MediaStreamType.Audio,
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Index = streams.Count
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});
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}
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/// <summary>
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/// Adds the subtitle stream.
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/// </summary>
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/// <param name="streams">The streams.</param>
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/// <param name="textStream">The text stream.</param>
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private static void AddSubtitleStream(List<MediaStream> streams, TSTextStream textStream)
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{
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streams.Add(new MediaStream
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{
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Language = textStream.LanguageCode,
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Codec = textStream.CodecShortName,
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Type = MediaStreamType.Subtitle,
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Index = streams.Count
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});
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}
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/// <summary>
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/// Adds the subtitle stream.
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/// </summary>
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/// <param name="streams">The streams.</param>
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/// <param name="textStream">The text stream.</param>
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private static void AddSubtitleStream(List<MediaStream> streams, TSGraphicsStream textStream)
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{
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streams.Add(new MediaStream
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{
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Language = textStream.LanguageCode,
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Codec = textStream.CodecShortName,
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Type = MediaStreamType.Subtitle,
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Index = streams.Count
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});
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}
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}
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}
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LukePulverenti
11 years ago