712 lines
25 KiB
C#
712 lines
25 KiB
C#
using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Model.Drawing;
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using MediaBrowser.Model.Dto;
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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.ComponentModel;
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using System.Diagnostics;
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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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using System.Threading.Tasks;
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using MediaBrowser.Server.Implementations.HttpServer;
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namespace MediaBrowser.Api.Playback
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{
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/// <summary>
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/// Class BaseStreamingService
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/// </summary>
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public abstract class BaseStreamingService : BaseRestService
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{
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/// <summary>
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/// Gets or sets the application paths.
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/// </summary>
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/// <value>The application paths.</value>
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protected IServerApplicationPaths ApplicationPaths { get; set; }
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/// <summary>
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/// Gets or sets the user manager.
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/// </summary>
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/// <value>The user manager.</value>
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protected IUserManager UserManager { get; set; }
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/// <summary>
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/// Gets or sets the library manager.
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/// </summary>
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/// <value>The library manager.</value>
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protected ILibraryManager LibraryManager { get; set; }
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/// <summary>
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/// Gets or sets the iso manager.
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/// </summary>
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/// <value>The iso manager.</value>
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protected IIsoManager IsoManager { get; set; }
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/// <summary>
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/// Initializes a new instance of the <see cref="BaseStreamingService" /> class.
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/// </summary>
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/// <param name="appPaths">The app paths.</param>
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/// <param name="userManager">The user manager.</param>
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/// <param name="libraryManager">The library manager.</param>
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/// <param name="isoManager">The iso manager.</param>
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protected BaseStreamingService(IServerApplicationPaths appPaths, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager)
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{
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ApplicationPaths = appPaths;
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UserManager = userManager;
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LibraryManager = libraryManager;
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IsoManager = isoManager;
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}
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/// <summary>
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/// Gets the command line arguments.
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/// </summary>
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/// <param name="outputPath">The output path.</param>
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/// <param name="state">The state.</param>
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/// <returns>System.String.</returns>
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protected abstract string GetCommandLineArguments(string outputPath, StreamState state);
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/// <summary>
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/// Gets the type of the transcoding job.
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/// </summary>
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/// <value>The type of the transcoding job.</value>
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protected abstract TranscodingJobType TranscodingJobType { get; }
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/// <summary>
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/// Gets the output file extension.
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/// </summary>
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/// <param name="state">The state.</param>
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/// <returns>System.String.</returns>
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protected virtual string GetOutputFileExtension(StreamState state)
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{
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return Path.GetExtension(state.Url);
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}
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/// <summary>
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/// Gets the output file path.
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/// </summary>
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/// <param name="state">The state.</param>
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/// <returns>System.String.</returns>
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protected string GetOutputFilePath(StreamState state)
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{
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var folder = ApplicationPaths.EncodedMediaCachePath;
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return Path.Combine(folder, GetCommandLineArguments("dummy\\dummy", state).GetMD5() + GetOutputFileExtension(state).ToLower());
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}
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/// <summary>
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/// The fast seek offset seconds
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/// </summary>
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private const int FastSeekOffsetSeconds = 1;
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/// <summary>
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/// Gets the fast seek command line parameter.
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/// </summary>
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/// <param name="request">The request.</param>
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/// <returns>System.String.</returns>
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/// <value>The fast seek command line parameter.</value>
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protected string GetFastSeekCommandLineParameter(StreamRequest request)
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{
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var time = request.StartTimeTicks;
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if (time.HasValue)
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{
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var seconds = TimeSpan.FromTicks(time.Value).TotalSeconds - FastSeekOffsetSeconds;
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if (seconds > 0)
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{
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return string.Format("-ss {0}", seconds);
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}
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}
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return string.Empty;
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}
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/// <summary>
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/// Gets the slow seek command line parameter.
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/// </summary>
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/// <param name="request">The request.</param>
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/// <returns>System.String.</returns>
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/// <value>The slow seek command line parameter.</value>
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protected string GetSlowSeekCommandLineParameter(StreamRequest request)
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{
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var time = request.StartTimeTicks;
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if (time.HasValue)
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{
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if (TimeSpan.FromTicks(time.Value).TotalSeconds - FastSeekOffsetSeconds > 0)
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{
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return string.Format(" -ss {0}", FastSeekOffsetSeconds);
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}
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}
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return string.Empty;
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}
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/// <summary>
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/// Gets the map args.
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/// </summary>
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/// <param name="state">The state.</param>
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/// <returns>System.String.</returns>
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protected virtual string GetMapArgs(StreamState state)
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{
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var args = string.Empty;
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if (state.VideoStream != null)
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{
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args += string.Format("-map 0:{0}", state.VideoStream.Index);
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}
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else
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{
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args += "-map -0:v";
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}
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if (state.AudioStream != null)
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{
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args += string.Format(" -map 0:{0}", state.AudioStream.Index);
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}
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else
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{
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args += " -map -0:a";
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}
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if (state.SubtitleStream == null)
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{
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args += " -map -0:s";
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}
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return args;
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}
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/// <summary>
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/// Determines which stream will be used for playback
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/// </summary>
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/// <param name="allStream">All stream.</param>
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/// <param name="desiredIndex">Index of the desired.</param>
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/// <param name="type">The type.</param>
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/// <param name="returnFirstIfNoIndex">if set to <c>true</c> [return first if no index].</param>
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/// <returns>MediaStream.</returns>
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private MediaStream GetMediaStream(IEnumerable<MediaStream> allStream, int? desiredIndex, MediaStreamType type, bool returnFirstIfNoIndex = true)
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{
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var streams = allStream.Where(s => s.Type == type).ToList();
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if (desiredIndex.HasValue)
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{
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var stream = streams.FirstOrDefault(s => s.Index == desiredIndex.Value);
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if (stream != null)
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{
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return stream;
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}
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}
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// Just return the first one
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return returnFirstIfNoIndex ? streams.FirstOrDefault() : null;
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}
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/// <summary>
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/// If we're going to put a fixed size on the command line, this will calculate it
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/// </summary>
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/// <param name="state">The state.</param>
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/// <param name="outputVideoCodec">The output video codec.</param>
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/// <returns>System.String.</returns>
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protected string GetOutputSizeParam(StreamState state, string outputVideoCodec)
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{
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// http://sonnati.wordpress.com/2012/10/19/ffmpeg-the-swiss-army-knife-of-internet-streaming-part-vi/
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var assSubtitleParam = string.Empty;
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var request = state.VideoRequest;
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if (state.SubtitleStream != null)
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{
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if (state.SubtitleStream.Codec.IndexOf("srt", StringComparison.OrdinalIgnoreCase) != -1 || state.SubtitleStream.Codec.IndexOf("subrip", StringComparison.OrdinalIgnoreCase) != -1)
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{
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assSubtitleParam = GetTextSubtitleParam((Video)state.Item, state.SubtitleStream, request.StartTimeTicks);
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}
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}
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// If fixed dimensions were supplied
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if (request.Width.HasValue && request.Height.HasValue)
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{
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return string.Format(" -vf \"scale={0}:{1}{2}\"", request.Width.Value, request.Height.Value, assSubtitleParam);
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}
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var isH264Output = outputVideoCodec.Equals("libx264", StringComparison.OrdinalIgnoreCase);
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// If a fixed width was requested
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if (request.Width.HasValue)
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{
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return isH264Output ?
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string.Format(" -vf \"scale={0}:trunc(ow/a/2)*2{1}\"", request.Width.Value, assSubtitleParam) :
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string.Format(" -vf \"scale={0}:-1{1}\"", request.Width.Value, assSubtitleParam);
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}
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// If a max width was requested
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if (request.MaxWidth.HasValue && !request.MaxHeight.HasValue)
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{
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return isH264Output ?
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string.Format(" -vf \"scale=min(iw\\,{0}):trunc(ow/a/2)*2{1}\"", request.MaxWidth.Value, assSubtitleParam) :
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string.Format(" -vf \"scale=min(iw\\,{0}):-1{1}\"", request.MaxWidth.Value, assSubtitleParam);
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}
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// Need to perform calculations manually
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// Try to account for bad media info
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var currentHeight = state.VideoStream.Height ?? request.MaxHeight ?? request.Height ?? 0;
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var currentWidth = state.VideoStream.Width ?? request.MaxWidth ?? request.Width ?? 0;
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var outputSize = DrawingUtils.Resize(currentWidth, currentHeight, request.Width, request.Height, request.MaxWidth, request.MaxHeight);
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// If we're encoding with libx264, it can't handle odd numbered widths or heights, so we'll have to fix that
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if (isH264Output)
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{
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return string.Format(" -vf \"scale=trunc({0}/2)*2:trunc({1}/2)*2{2}\"", outputSize.Width, outputSize.Height, assSubtitleParam);
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}
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// Otherwise use -vf scale since ffmpeg will ensure internally that the aspect ratio is preserved
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return string.Format(" -vf \"scale={0}:-1{1}\"", Convert.ToInt32(outputSize.Width), assSubtitleParam);
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}
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/// <summary>
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/// Gets the text subtitle param.
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/// </summary>
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/// <param name="video">The video.</param>
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/// <param name="subtitleStream">The subtitle stream.</param>
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/// <param name="startTimeTicks">The start time ticks.</param>
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/// <returns>System.String.</returns>
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protected string GetTextSubtitleParam(Video video, MediaStream subtitleStream, long? startTimeTicks)
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{
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var path = subtitleStream.IsExternal ? GetConvertedAssPath(video, subtitleStream) : GetExtractedAssPath(video, subtitleStream);
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if (string.IsNullOrEmpty(path))
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{
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return string.Empty;
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}
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var param = string.Format(",ass={0}", path);
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if (startTimeTicks.HasValue)
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{
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var seconds = Convert.ToInt32(TimeSpan.FromTicks(startTimeTicks.Value).TotalSeconds);
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param += string.Format(",setpts=PTS-{0}/TB", seconds);
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}
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return param;
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}
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/// <summary>
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/// Gets the extracted ass path.
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/// </summary>
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/// <param name="video">The video.</param>
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/// <param name="subtitleStream">The subtitle stream.</param>
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/// <returns>System.String.</returns>
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private string GetExtractedAssPath(Video video, MediaStream subtitleStream)
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{
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var path = Kernel.Instance.FFMpegManager.GetSubtitleCachePath(video, subtitleStream.Index, ".ass");
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if (!File.Exists(path))
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{
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var success = Kernel.Instance.FFMpegManager.ExtractTextSubtitle(video, subtitleStream.Index, path, CancellationToken.None).Result;
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if (!success)
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{
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return null;
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}
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}
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return path;
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}
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/// <summary>
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/// Gets the converted ass path.
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/// </summary>
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/// <param name="video">The video.</param>
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/// <param name="subtitleStream">The subtitle stream.</param>
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/// <returns>System.String.</returns>
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private string GetConvertedAssPath(Video video, MediaStream subtitleStream)
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{
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var path = Kernel.Instance.FFMpegManager.GetSubtitleCachePath(video, subtitleStream.Index, ".ass");
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if (!File.Exists(path))
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{
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var success = Kernel.Instance.FFMpegManager.ConvertTextSubtitle(subtitleStream, path, CancellationToken.None).Result;
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if (!success)
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{
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return null;
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}
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}
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return path;
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}
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/// <summary>
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/// Gets the internal graphical subtitle param.
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/// </summary>
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/// <param name="state">The state.</param>
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/// <param name="outputVideoCodec">The output video codec.</param>
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/// <returns>System.String.</returns>
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protected string GetInternalGraphicalSubtitleParam(StreamState state, string outputVideoCodec)
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{
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var outputSizeParam = string.Empty;
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var request = state.VideoRequest;
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// Add resolution params, if specified
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if (request.Width.HasValue || request.Height.HasValue || request.MaxHeight.HasValue || request.MaxWidth.HasValue)
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{
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outputSizeParam = GetOutputSizeParam(state, outputVideoCodec).TrimEnd('"');
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outputSizeParam = "," + outputSizeParam.Substring(outputSizeParam.IndexOf("scale", StringComparison.OrdinalIgnoreCase));
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}
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return string.Format(" -filter_complex \"[0:{0}]format=yuva444p,lut=u=128:v=128:y=gammaval(.3)[sub] ; [0:0] [sub] overlay{1}\"", state.SubtitleStream.Index, outputSizeParam);
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}
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/// <summary>
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/// Gets the number of audio channels to specify on the command line
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/// </summary>
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/// <param name="request">The request.</param>
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/// <param name="audioStream">The audio stream.</param>
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/// <returns>System.Nullable{System.Int32}.</returns>
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protected int? GetNumAudioChannelsParam(StreamRequest request, MediaStream audioStream)
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{
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if (audioStream.Channels > 2 && request.AudioCodec.HasValue)
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{
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if (request.AudioCodec.Value == AudioCodecs.Aac)
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{
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// libvo_aacenc currently only supports two channel output
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return 2;
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}
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if (request.AudioCodec.Value == AudioCodecs.Wma)
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{
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// wmav2 currently only supports two channel output
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return 2;
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}
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}
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return request.AudioChannels;
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}
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/// <summary>
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/// Determines whether the specified stream is H264.
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/// </summary>
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/// <param name="stream">The stream.</param>
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/// <returns><c>true</c> if the specified stream is H264; otherwise, <c>false</c>.</returns>
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protected bool IsH264(MediaStream stream)
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{
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return stream.Codec.IndexOf("264", StringComparison.OrdinalIgnoreCase) != -1 ||
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stream.Codec.IndexOf("avc", StringComparison.OrdinalIgnoreCase) != -1;
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}
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/// <summary>
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/// Gets the name of the output audio codec
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/// </summary>
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/// <param name="request">The request.</param>
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/// <returns>System.String.</returns>
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protected string GetAudioCodec(StreamRequest request)
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{
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var codec = request.AudioCodec;
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if (codec.HasValue)
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{
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if (codec == AudioCodecs.Aac)
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{
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return "libvo_aacenc";
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}
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if (codec == AudioCodecs.Mp3)
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{
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return "libmp3lame";
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}
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if (codec == AudioCodecs.Vorbis)
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{
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return "libvorbis";
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}
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if (codec == AudioCodecs.Wma)
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{
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return "wmav2";
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}
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}
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return "copy";
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}
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/// <summary>
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/// Gets the name of the output video codec
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/// </summary>
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/// <param name="request">The request.</param>
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/// <returns>System.String.</returns>
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protected string GetVideoCodec(VideoStreamRequest request)
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{
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var codec = request.VideoCodec;
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if (codec.HasValue)
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{
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if (codec == VideoCodecs.H264)
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{
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return "libx264";
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}
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if (codec == VideoCodecs.Vpx)
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{
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return "libvpx";
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}
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if (codec == VideoCodecs.Wmv)
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{
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return "wmv2";
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}
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if (codec == VideoCodecs.Theora)
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{
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return "libtheora";
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}
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}
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return "copy";
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}
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/// <summary>
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/// Gets the input argument.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <param name="isoMount">The iso mount.</param>
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/// <returns>System.String.</returns>
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protected string GetInputArgument(BaseItem item, IIsoMount isoMount)
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{
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return isoMount == null ?
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Kernel.Instance.FFMpegManager.GetInputArgument(item) :
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Kernel.Instance.FFMpegManager.GetInputArgument(item as Video, isoMount);
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}
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/// <summary>
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/// Starts the FFMPEG.
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/// </summary>
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/// <param name="state">The state.</param>
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/// <param name="outputPath">The output path.</param>
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/// <returns>Task.</returns>
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protected async Task StartFFMpeg(StreamState state, string outputPath)
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{
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var video = state.Item as Video;
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if (video != null && video.VideoType == VideoType.Iso && video.IsoType.HasValue && IsoManager.CanMount(video.Path))
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{
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state.IsoMount = await IsoManager.Mount(video.Path, CancellationToken.None).ConfigureAwait(false);
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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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CreateNoWindow = true,
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UseShellExecute = false,
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// Must consume both stdout and stderr or deadlocks may occur
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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FileName = Kernel.Instance.FFMpegManager.FFMpegPath,
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WorkingDirectory = Path.GetDirectoryName(Kernel.Instance.FFMpegManager.FFMpegPath),
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Arguments = GetCommandLineArguments(outputPath, state),
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WindowStyle = ProcessWindowStyle.Hidden,
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ErrorDialog = false
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},
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EnableRaisingEvents = true
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};
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ApiEntryPoint.Instance.OnTranscodeBeginning(outputPath, TranscodingJobType, process);
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Logger.Info(process.StartInfo.FileName + " " + process.StartInfo.Arguments);
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var logFilePath = Path.Combine(ApplicationPaths.LogDirectoryPath, "ffmpeg-" + Guid.NewGuid() + ".txt");
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// FFMpeg writes debug/error info to stderr. This is useful when debugging so let's put it in the log directory.
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state.LogFileStream = new FileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, StreamDefaults.DefaultFileStreamBufferSize, FileOptions.Asynchronous);
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process.Exited += (sender, args) => OnFFMpegProcessExited(process, state);
|
|
|
|
try
|
|
{
|
|
process.Start();
|
|
}
|
|
catch (Win32Exception ex)
|
|
{
|
|
Logger.ErrorException("Error starting ffmpeg", ex);
|
|
|
|
ApiEntryPoint.Instance.OnTranscodeFailedToStart(outputPath, TranscodingJobType);
|
|
|
|
state.LogFileStream.Dispose();
|
|
|
|
throw;
|
|
}
|
|
|
|
// MUST read both stdout and stderr asynchronously or a deadlock may occurr
|
|
process.BeginOutputReadLine();
|
|
|
|
// Important - don't await the log task or we won't be able to kill ffmpeg when the user stops playback
|
|
process.StandardError.BaseStream.CopyToAsync(state.LogFileStream);
|
|
|
|
// Wait for the file to exist before proceeeding
|
|
while (!File.Exists(outputPath))
|
|
{
|
|
await Task.Delay(100).ConfigureAwait(false);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Processes the exited.
|
|
/// </summary>
|
|
/// <param name="process">The process.</param>
|
|
/// <param name="state">The state.</param>
|
|
protected void OnFFMpegProcessExited(Process process, StreamState state)
|
|
{
|
|
if (state.IsoMount != null)
|
|
{
|
|
state.IsoMount.Dispose();
|
|
state.IsoMount = null;
|
|
}
|
|
|
|
var outputFilePath = GetOutputFilePath(state);
|
|
|
|
state.LogFileStream.Dispose();
|
|
|
|
int? exitCode = null;
|
|
|
|
try
|
|
{
|
|
exitCode = process.ExitCode;
|
|
Logger.Info("FFMpeg exited with code {0} for {1}", exitCode.Value, outputFilePath);
|
|
}
|
|
catch
|
|
{
|
|
Logger.Info("FFMpeg exited with an error for {0}", outputFilePath);
|
|
}
|
|
|
|
process.Dispose();
|
|
|
|
ApiEntryPoint.Instance.OnTranscodingFinished(outputFilePath, TranscodingJobType);
|
|
|
|
if (!exitCode.HasValue || exitCode.Value != 0)
|
|
{
|
|
Logger.Info("Deleting partial stream file(s) {0}", outputFilePath);
|
|
|
|
try
|
|
{
|
|
DeletePartialStreamFiles(outputFilePath);
|
|
}
|
|
catch (IOException ex)
|
|
{
|
|
Logger.ErrorException("Error deleting partial stream file(s) {0}", ex, outputFilePath);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Logger.Info("FFMpeg completed and exited normally for {0}", outputFilePath);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Deletes the partial stream files.
|
|
/// </summary>
|
|
/// <param name="outputFilePath">The output file path.</param>
|
|
protected abstract void DeletePartialStreamFiles(string outputFilePath);
|
|
|
|
/// <summary>
|
|
/// Gets the state.
|
|
/// </summary>
|
|
/// <param name="request">The request.</param>
|
|
/// <returns>StreamState.</returns>
|
|
protected StreamState GetState(StreamRequest request)
|
|
{
|
|
var item = DtoBuilder.GetItemByClientId(request.Id, UserManager, LibraryManager);
|
|
|
|
var media = (IHasMediaStreams)item;
|
|
|
|
var url = Request.PathInfo;
|
|
|
|
if (!request.AudioCodec.HasValue)
|
|
{
|
|
request.AudioCodec = InferAudioCodec(url);
|
|
}
|
|
|
|
var state = new StreamState
|
|
{
|
|
Item = item,
|
|
Request = request,
|
|
Url = url
|
|
};
|
|
|
|
var videoRequest = request as VideoStreamRequest;
|
|
|
|
if (videoRequest != null)
|
|
{
|
|
if (!videoRequest.VideoCodec.HasValue)
|
|
{
|
|
videoRequest.VideoCodec = InferVideoCodec(url);
|
|
}
|
|
|
|
state.VideoStream = GetMediaStream(media.MediaStreams, videoRequest.VideoStreamIndex, MediaStreamType.Video, true);
|
|
state.SubtitleStream = GetMediaStream(media.MediaStreams, videoRequest.SubtitleStreamIndex, MediaStreamType.Subtitle, false);
|
|
}
|
|
else
|
|
{
|
|
state.AudioStream = GetMediaStream(media.MediaStreams, null, MediaStreamType.Audio, true);
|
|
}
|
|
|
|
return state;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Infers the audio codec based on the url
|
|
/// </summary>
|
|
/// <param name="url">The URL.</param>
|
|
/// <returns>System.Nullable{AudioCodecs}.</returns>
|
|
private AudioCodecs? InferAudioCodec(string url)
|
|
{
|
|
var ext = Path.GetExtension(url);
|
|
|
|
if (string.Equals(ext, ".mp3", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return AudioCodecs.Mp3;
|
|
}
|
|
if (string.Equals(ext, ".aac", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return AudioCodecs.Aac;
|
|
}
|
|
if (string.Equals(ext, ".wam", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return AudioCodecs.Wma;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Infers the video codec.
|
|
/// </summary>
|
|
/// <param name="url">The URL.</param>
|
|
/// <returns>System.Nullable{VideoCodecs}.</returns>
|
|
private VideoCodecs? InferVideoCodec(string url)
|
|
{
|
|
var ext = Path.GetExtension(url);
|
|
|
|
if (string.Equals(ext, ".asf", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return VideoCodecs.Wmv;
|
|
}
|
|
if (string.Equals(ext, ".webm", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return VideoCodecs.Vpx;
|
|
}
|
|
if (string.Equals(ext, ".ogg", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return VideoCodecs.Theora;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
}
|