ec1f5dc317
Add Argument*Exceptions now use proper nameof operators. Added exception messages to quite a few Argument*Exceptions. Fixed rethorwing to be proper syntax. Added a ton of null checkes. (This is only a start, there are about 500 places that need proper null handling) Added some TODOs to log certain exceptions. Fix sln again. Fixed all AssemblyInfo's and added proper copyright (where I could find them) We live in *current year*. Fixed the use of braces. Fixed a ton of properties, and made a fair amount of functions static that should be and can be static. Made more Methods that should be static static. You can now use static to find bad functions! Removed unused variable. And added one more proper XML comment.
973 lines
37 KiB
C#
973 lines
37 KiB
C#
using MediaBrowser.Common.Net;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Controller.Devices;
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using MediaBrowser.Controller.Dlna;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.MediaEncoding;
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using MediaBrowser.Controller.Net;
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using MediaBrowser.Model.Dlna;
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using MediaBrowser.Model.Entities;
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using MediaBrowser.Model.Extensions;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Serialization;
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using System;
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using System.Collections.Generic;
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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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using MediaBrowser.Model.Configuration;
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using MediaBrowser.Model.Services;
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using MimeTypes = MediaBrowser.Model.Net.MimeTypes;
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using Microsoft.Extensions.Logging;
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namespace MediaBrowser.Api.Playback.Hls
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{
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/// <summary>
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/// Options is needed for chromecast. Threw Head in there since it's related
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/// </summary>
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[Route("/Videos/{Id}/master.m3u8", "GET", Summary = "Gets a video stream using HTTP live streaming.")]
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[Route("/Videos/{Id}/master.m3u8", "HEAD", Summary = "Gets a video stream using HTTP live streaming.")]
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public class GetMasterHlsVideoPlaylist : VideoStreamRequest, IMasterHlsRequest
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{
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public bool EnableAdaptiveBitrateStreaming { get; set; }
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public GetMasterHlsVideoPlaylist()
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{
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EnableAdaptiveBitrateStreaming = true;
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}
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}
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[Route("/Audio/{Id}/master.m3u8", "GET", Summary = "Gets an audio stream using HTTP live streaming.")]
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[Route("/Audio/{Id}/master.m3u8", "HEAD", Summary = "Gets an audio stream using HTTP live streaming.")]
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public class GetMasterHlsAudioPlaylist : StreamRequest, IMasterHlsRequest
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{
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public bool EnableAdaptiveBitrateStreaming { get; set; }
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public GetMasterHlsAudioPlaylist()
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{
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EnableAdaptiveBitrateStreaming = true;
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}
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}
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public interface IMasterHlsRequest
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{
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bool EnableAdaptiveBitrateStreaming { get; set; }
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}
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[Route("/Videos/{Id}/main.m3u8", "GET", Summary = "Gets a video stream using HTTP live streaming.")]
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public class GetVariantHlsVideoPlaylist : VideoStreamRequest
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{
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}
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[Route("/Audio/{Id}/main.m3u8", "GET", Summary = "Gets an audio stream using HTTP live streaming.")]
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public class GetVariantHlsAudioPlaylist : StreamRequest
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{
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}
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[Route("/Videos/{Id}/hls1/{PlaylistId}/{SegmentId}.{SegmentContainer}", "GET")]
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public class GetHlsVideoSegment : VideoStreamRequest
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{
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public string PlaylistId { get; set; }
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/// <summary>
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/// Gets or sets the segment id.
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/// </summary>
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/// <value>The segment id.</value>
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public string SegmentId { get; set; }
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}
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[Route("/Audio/{Id}/hls1/{PlaylistId}/{SegmentId}.{SegmentContainer}", "GET")]
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public class GetHlsAudioSegment : StreamRequest
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{
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public string PlaylistId { get; set; }
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/// <summary>
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/// Gets or sets the segment id.
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/// </summary>
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/// <value>The segment id.</value>
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public string SegmentId { get; set; }
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}
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[Authenticated]
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public class DynamicHlsService : BaseHlsService
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{
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public DynamicHlsService(IServerConfigurationManager serverConfig, IUserManager userManager, ILibraryManager libraryManager, IIsoManager isoManager, IMediaEncoder mediaEncoder, IFileSystem fileSystem, IDlnaManager dlnaManager, ISubtitleEncoder subtitleEncoder, IDeviceManager deviceManager, IMediaSourceManager mediaSourceManager, IZipClient zipClient, IJsonSerializer jsonSerializer, IAuthorizationContext authorizationContext, INetworkManager networkManager) : base(serverConfig, userManager, libraryManager, isoManager, mediaEncoder, fileSystem, dlnaManager, subtitleEncoder, deviceManager, mediaSourceManager, zipClient, jsonSerializer, authorizationContext)
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{
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NetworkManager = networkManager;
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}
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protected INetworkManager NetworkManager { get; private set; }
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public Task<object> Get(GetMasterHlsVideoPlaylist request)
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{
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return GetMasterPlaylistInternal(request, "GET");
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}
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public Task<object> Head(GetMasterHlsVideoPlaylist request)
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{
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return GetMasterPlaylistInternal(request, "HEAD");
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}
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public Task<object> Get(GetMasterHlsAudioPlaylist request)
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{
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return GetMasterPlaylistInternal(request, "GET");
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}
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public Task<object> Head(GetMasterHlsAudioPlaylist request)
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{
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return GetMasterPlaylistInternal(request, "HEAD");
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}
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public Task<object> Get(GetVariantHlsVideoPlaylist request)
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{
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return GetVariantPlaylistInternal(request, true, "main");
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}
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public Task<object> Get(GetVariantHlsAudioPlaylist request)
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{
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return GetVariantPlaylistInternal(request, false, "main");
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}
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public Task<object> Get(GetHlsVideoSegment request)
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{
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return GetDynamicSegment(request, request.SegmentId);
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}
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public Task<object> Get(GetHlsAudioSegment request)
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{
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return GetDynamicSegment(request, request.SegmentId);
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}
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private async Task<object> GetDynamicSegment(StreamRequest request, string segmentId)
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{
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if ((request.StartTimeTicks ?? 0) > 0)
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{
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throw new ArgumentException("StartTimeTicks is not allowed.");
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}
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var cancellationTokenSource = new CancellationTokenSource();
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var cancellationToken = cancellationTokenSource.Token;
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var requestedIndex = int.Parse(segmentId, NumberStyles.Integer, UsCulture);
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var state = await GetState(request, cancellationToken).ConfigureAwait(false);
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var playlistPath = Path.ChangeExtension(state.OutputFilePath, ".m3u8");
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var segmentPath = GetSegmentPath(state, playlistPath, requestedIndex);
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var segmentExtension = GetSegmentFileExtension(state.Request);
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TranscodingJob job = null;
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if (FileSystem.FileExists(segmentPath))
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{
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job = ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
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return await GetSegmentResult(state, playlistPath, segmentPath, segmentExtension, requestedIndex, job, cancellationToken).ConfigureAwait(false);
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}
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var transcodingLock = ApiEntryPoint.Instance.GetTranscodingLock(playlistPath);
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await transcodingLock.WaitAsync(cancellationTokenSource.Token).ConfigureAwait(false);
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var released = false;
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var startTranscoding = false;
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try
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{
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if (FileSystem.FileExists(segmentPath))
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{
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job = ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
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transcodingLock.Release();
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released = true;
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return await GetSegmentResult(state, playlistPath, segmentPath, segmentExtension, requestedIndex, job, cancellationToken).ConfigureAwait(false);
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}
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else
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{
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var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension);
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var segmentGapRequiringTranscodingChange = 24 / state.SegmentLength;
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if (currentTranscodingIndex == null)
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{
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Logger.LogDebug("Starting transcoding because currentTranscodingIndex=null");
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startTranscoding = true;
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}
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else if (requestedIndex < currentTranscodingIndex.Value)
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{
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Logger.LogDebug("Starting transcoding because requestedIndex={0} and currentTranscodingIndex={1}", requestedIndex, currentTranscodingIndex);
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startTranscoding = true;
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}
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else if (requestedIndex - currentTranscodingIndex.Value > segmentGapRequiringTranscodingChange)
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{
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Logger.LogDebug("Starting transcoding because segmentGap is {0} and max allowed gap is {1}. requestedIndex={2}", requestedIndex - currentTranscodingIndex.Value, segmentGapRequiringTranscodingChange, requestedIndex);
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startTranscoding = true;
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}
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if (startTranscoding)
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{
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// If the playlist doesn't already exist, startup ffmpeg
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try
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{
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ApiEntryPoint.Instance.KillTranscodingJobs(request.DeviceId, request.PlaySessionId, p => false);
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if (currentTranscodingIndex.HasValue)
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{
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DeleteLastFile(playlistPath, segmentExtension, 0);
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}
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request.StartTimeTicks = GetStartPositionTicks(state, requestedIndex);
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job = await StartFfMpeg(state, playlistPath, cancellationTokenSource).ConfigureAwait(false);
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}
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catch
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{
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state.Dispose();
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throw;
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}
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//await WaitForMinimumSegmentCount(playlistPath, 1, cancellationTokenSource.Token).ConfigureAwait(false);
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}
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else
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{
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job = ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
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if (job.TranscodingThrottler != null)
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{
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job.TranscodingThrottler.UnpauseTranscoding();
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}
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}
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}
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}
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finally
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{
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if (!released)
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{
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transcodingLock.Release();
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}
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}
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//Logger.LogInformation("waiting for {0}", segmentPath);
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//while (!File.Exists(segmentPath))
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//{
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// await Task.Delay(50, cancellationToken).ConfigureAwait(false);
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//}
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Logger.LogInformation("returning {0}", segmentPath);
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job = job ?? ApiEntryPoint.Instance.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
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return await GetSegmentResult(state, playlistPath, segmentPath, segmentExtension, requestedIndex, job, cancellationToken).ConfigureAwait(false);
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}
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private const int BufferSize = 81920;
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private long GetStartPositionTicks(StreamState state, int requestedIndex)
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{
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double startSeconds = 0;
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var lengths = GetSegmentLengths(state);
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if (requestedIndex >= lengths.Length)
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{
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var msg = string.Format("Invalid segment index requested: {0} - Segment count: {1}", requestedIndex, lengths.Length);
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throw new ArgumentException(msg);
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}
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for (var i = 0; i < requestedIndex; i++)
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{
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startSeconds += lengths[i];
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}
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var position = TimeSpan.FromSeconds(startSeconds).Ticks;
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return position;
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}
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private long GetEndPositionTicks(StreamState state, int requestedIndex)
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{
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double startSeconds = 0;
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var lengths = GetSegmentLengths(state);
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if (requestedIndex >= lengths.Length)
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{
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var msg = string.Format("Invalid segment index requested: {0} - Segment count: {1}", requestedIndex, lengths.Length);
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throw new ArgumentException(msg);
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}
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for (var i = 0; i <= requestedIndex; i++)
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{
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startSeconds += lengths[i];
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}
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var position = TimeSpan.FromSeconds(startSeconds).Ticks;
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return position;
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}
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private double[] GetSegmentLengths(StreamState state)
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{
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var result = new List<double>();
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var ticks = state.RunTimeTicks ?? 0;
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var segmentLengthTicks = TimeSpan.FromSeconds(state.SegmentLength).Ticks;
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while (ticks > 0)
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{
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var length = ticks >= segmentLengthTicks ? segmentLengthTicks : ticks;
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result.Add(TimeSpan.FromTicks(length).TotalSeconds);
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ticks -= length;
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}
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return result.ToArray();
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}
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public int? GetCurrentTranscodingIndex(string playlist, string segmentExtension)
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{
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var job = ApiEntryPoint.Instance.GetTranscodingJob(playlist, TranscodingJobType);
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if (job == null || job.HasExited)
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{
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return null;
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}
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var file = GetLastTranscodingFile(playlist, segmentExtension, FileSystem);
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if (file == null)
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{
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return null;
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}
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var playlistFilename = Path.GetFileNameWithoutExtension(playlist);
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var indexString = Path.GetFileNameWithoutExtension(file.Name).Substring(playlistFilename.Length);
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return int.Parse(indexString, NumberStyles.Integer, UsCulture);
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}
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private void DeleteLastFile(string playlistPath, string segmentExtension, int retryCount)
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{
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var file = GetLastTranscodingFile(playlistPath, segmentExtension, FileSystem);
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if (file != null)
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{
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DeleteFile(file.FullName, retryCount);
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}
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}
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private void DeleteFile(string path, int retryCount)
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{
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if (retryCount >= 5)
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{
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return;
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}
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Logger.LogDebug("Deleting partial HLS file {path}", path);
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try
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{
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FileSystem.DeleteFile(path);
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}
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catch (IOException ex)
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{
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Logger.LogError(ex, "Error deleting partial stream file(s) {path}", path);
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var task = Task.Delay(100);
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Task.WaitAll(task);
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DeleteFile(path, retryCount + 1);
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}
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catch (Exception ex)
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{
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Logger.LogError(ex, "Error deleting partial stream file(s) {path}", path);
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}
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}
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private static FileSystemMetadata GetLastTranscodingFile(string playlist, string segmentExtension, IFileSystem fileSystem)
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{
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var folder = fileSystem.GetDirectoryName(playlist);
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var filePrefix = Path.GetFileNameWithoutExtension(playlist) ?? string.Empty;
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try
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{
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return fileSystem.GetFiles(folder, new[] { segmentExtension }, true, false)
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.Where(i => Path.GetFileNameWithoutExtension(i.Name).StartsWith(filePrefix, StringComparison.OrdinalIgnoreCase))
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.OrderByDescending(fileSystem.GetLastWriteTimeUtc)
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.FirstOrDefault();
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}
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catch (IOException)
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{
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return null;
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}
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}
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protected override int GetStartNumber(StreamState state)
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{
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return GetStartNumber(state.VideoRequest);
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}
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private int GetStartNumber(VideoStreamRequest request)
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{
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var segmentId = "0";
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var segmentRequest = request as GetHlsVideoSegment;
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if (segmentRequest != null)
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{
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segmentId = segmentRequest.SegmentId;
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}
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return int.Parse(segmentId, NumberStyles.Integer, UsCulture);
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}
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private string GetSegmentPath(StreamState state, string playlist, int index)
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{
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var folder = FileSystem.GetDirectoryName(playlist);
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var filename = Path.GetFileNameWithoutExtension(playlist);
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return Path.Combine(folder, filename + index.ToString(UsCulture) + GetSegmentFileExtension(state.Request));
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}
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private async Task<object> GetSegmentResult(StreamState state,
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string playlistPath,
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string segmentPath,
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string segmentExtension,
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int segmentIndex,
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TranscodingJob transcodingJob,
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CancellationToken cancellationToken)
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{
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var segmentFileExists = FileSystem.FileExists(segmentPath);
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// If all transcoding has completed, just return immediately
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if (transcodingJob != null && transcodingJob.HasExited && segmentFileExists)
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{
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return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false);
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}
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if (segmentFileExists)
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{
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var currentTranscodingIndex = GetCurrentTranscodingIndex(playlistPath, segmentExtension);
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// If requested segment is less than transcoding position, we can't transcode backwards, so assume it's ready
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if (segmentIndex < currentTranscodingIndex)
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{
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return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false);
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}
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}
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var segmentFilename = Path.GetFileName(segmentPath);
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while (!cancellationToken.IsCancellationRequested)
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{
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try
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{
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var text = FileSystem.ReadAllText(playlistPath, Encoding.UTF8);
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// If it appears in the playlist, it's done
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if (text.IndexOf(segmentFilename, StringComparison.OrdinalIgnoreCase) != -1)
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{
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if (!segmentFileExists)
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{
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segmentFileExists = FileSystem.FileExists(segmentPath);
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}
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if (segmentFileExists)
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{
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return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false);
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}
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//break;
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}
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}
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catch (IOException)
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{
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// May get an error if the file is locked
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}
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await Task.Delay(100, cancellationToken).ConfigureAwait(false);
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}
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cancellationToken.ThrowIfCancellationRequested();
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return await GetSegmentResult(state, segmentPath, segmentIndex, transcodingJob).ConfigureAwait(false);
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}
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private Task<object> GetSegmentResult(StreamState state, string segmentPath, int index, TranscodingJob transcodingJob)
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{
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var segmentEndingPositionTicks = GetEndPositionTicks(state, index);
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return ResultFactory.GetStaticFileResult(Request, new StaticFileResultOptions
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{
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Path = segmentPath,
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FileShare = FileShareMode.ReadWrite,
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OnComplete = () =>
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{
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if (transcodingJob != null)
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{
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transcodingJob.DownloadPositionTicks = Math.Max(transcodingJob.DownloadPositionTicks ?? segmentEndingPositionTicks, segmentEndingPositionTicks);
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ApiEntryPoint.Instance.OnTranscodeEndRequest(transcodingJob);
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}
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}
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});
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}
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private async Task<object> GetMasterPlaylistInternal(StreamRequest request, string method)
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{
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var state = await GetState(request, CancellationToken.None).ConfigureAwait(false);
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if (string.IsNullOrEmpty(request.MediaSourceId))
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{
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throw new ArgumentException("MediaSourceId is required");
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}
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var playlistText = string.Empty;
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if (string.Equals(method, "GET", StringComparison.OrdinalIgnoreCase))
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{
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var audioBitrate = state.OutputAudioBitrate ?? 0;
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var videoBitrate = state.OutputVideoBitrate ?? 0;
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playlistText = GetMasterPlaylistFileText(state, videoBitrate + audioBitrate);
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}
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return ResultFactory.GetResult(playlistText, MimeTypes.GetMimeType("playlist.m3u8"), new Dictionary<string, string>());
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}
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private string GetMasterPlaylistFileText(StreamState state, int totalBitrate)
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{
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var builder = new StringBuilder();
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builder.AppendLine("#EXTM3U");
|
|
|
|
var isLiveStream = state.IsSegmentedLiveStream;
|
|
|
|
var queryStringIndex = Request.RawUrl.IndexOf('?');
|
|
var queryString = queryStringIndex == -1 ? string.Empty : Request.RawUrl.Substring(queryStringIndex);
|
|
|
|
// from universal audio service
|
|
if (queryString.IndexOf("SegmentContainer", StringComparison.OrdinalIgnoreCase) == -1 && !string.IsNullOrWhiteSpace(state.Request.SegmentContainer))
|
|
{
|
|
queryString += "&SegmentContainer=" + state.Request.SegmentContainer;
|
|
}
|
|
// from universal audio service
|
|
if (!string.IsNullOrWhiteSpace(state.Request.TranscodeReasons) && queryString.IndexOf("TranscodeReasons=", StringComparison.OrdinalIgnoreCase) == -1)
|
|
{
|
|
queryString += "&TranscodeReasons=" + state.Request.TranscodeReasons;
|
|
}
|
|
|
|
// Main stream
|
|
var playlistUrl = isLiveStream ? "live.m3u8" : "main.m3u8";
|
|
|
|
playlistUrl += queryString;
|
|
|
|
var request = state.Request;
|
|
|
|
var subtitleStreams = state.MediaSource
|
|
.MediaStreams
|
|
.Where(i => i.IsTextSubtitleStream)
|
|
.ToList();
|
|
|
|
var subtitleGroup = subtitleStreams.Count > 0 &&
|
|
request is GetMasterHlsVideoPlaylist &&
|
|
(state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Hls || state.VideoRequest.EnableSubtitlesInManifest) ?
|
|
"subs" :
|
|
null;
|
|
|
|
// If we're burning in subtitles then don't add additional subs to the manifest
|
|
if (state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode)
|
|
{
|
|
subtitleGroup = null;
|
|
}
|
|
|
|
if (!string.IsNullOrWhiteSpace(subtitleGroup))
|
|
{
|
|
AddSubtitles(state, subtitleStreams, builder);
|
|
}
|
|
|
|
AppendPlaylist(builder, state, playlistUrl, totalBitrate, subtitleGroup);
|
|
|
|
if (EnableAdaptiveBitrateStreaming(state, isLiveStream))
|
|
{
|
|
var requestedVideoBitrate = state.VideoRequest == null ? 0 : state.VideoRequest.VideoBitRate ?? 0;
|
|
|
|
// By default, vary by just 200k
|
|
var variation = GetBitrateVariation(totalBitrate);
|
|
|
|
var newBitrate = totalBitrate - variation;
|
|
var variantUrl = ReplaceBitrate(playlistUrl, requestedVideoBitrate, requestedVideoBitrate - variation);
|
|
AppendPlaylist(builder, state, variantUrl, newBitrate, subtitleGroup);
|
|
|
|
variation *= 2;
|
|
newBitrate = totalBitrate - variation;
|
|
variantUrl = ReplaceBitrate(playlistUrl, requestedVideoBitrate, requestedVideoBitrate - variation);
|
|
AppendPlaylist(builder, state, variantUrl, newBitrate, subtitleGroup);
|
|
}
|
|
|
|
return builder.ToString();
|
|
}
|
|
|
|
private string ReplaceBitrate(string url, int oldValue, int newValue)
|
|
{
|
|
return url.Replace(
|
|
"videobitrate=" + oldValue.ToString(UsCulture),
|
|
"videobitrate=" + newValue.ToString(UsCulture),
|
|
StringComparison.OrdinalIgnoreCase);
|
|
}
|
|
|
|
private void AddSubtitles(StreamState state, IEnumerable<MediaStream> subtitles, StringBuilder builder)
|
|
{
|
|
var selectedIndex = state.SubtitleStream == null || state.SubtitleDeliveryMethod != SubtitleDeliveryMethod.Hls ? (int?)null : state.SubtitleStream.Index;
|
|
|
|
foreach (var stream in subtitles)
|
|
{
|
|
const string format = "#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=\"subs\",NAME=\"{0}\",DEFAULT={1},FORCED={2},AUTOSELECT=YES,URI=\"{3}\",LANGUAGE=\"{4}\"";
|
|
|
|
var name = stream.DisplayTitle;
|
|
|
|
var isDefault = selectedIndex.HasValue && selectedIndex.Value == stream.Index;
|
|
var isForced = stream.IsForced;
|
|
|
|
var url = string.Format("{0}/Subtitles/{1}/subtitles.m3u8?SegmentLength={2}&api_key={3}",
|
|
state.Request.MediaSourceId,
|
|
stream.Index.ToString(UsCulture),
|
|
30.ToString(UsCulture),
|
|
AuthorizationContext.GetAuthorizationInfo(Request).Token);
|
|
|
|
var line = string.Format(format,
|
|
name,
|
|
isDefault ? "YES" : "NO",
|
|
isForced ? "YES" : "NO",
|
|
url,
|
|
stream.Language ?? "Unknown");
|
|
|
|
builder.AppendLine(line);
|
|
}
|
|
}
|
|
|
|
private bool EnableAdaptiveBitrateStreaming(StreamState state, bool isLiveStream)
|
|
{
|
|
// Within the local network this will likely do more harm than good.
|
|
if (Request.IsLocal || NetworkManager.IsInLocalNetwork(Request.RemoteIp))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var request = state.Request as IMasterHlsRequest;
|
|
if (request != null && !request.EnableAdaptiveBitrateStreaming)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (isLiveStream || string.IsNullOrWhiteSpace(state.MediaPath))
|
|
{
|
|
// Opening live streams is so slow it's not even worth it
|
|
return false;
|
|
}
|
|
|
|
if (string.Equals(state.OutputVideoCodec, "copy", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (string.Equals(state.OutputAudioCodec, "copy", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (!state.IsOutputVideo)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
// Having problems in android
|
|
return false;
|
|
//return state.VideoRequest.VideoBitRate.HasValue;
|
|
}
|
|
|
|
private void AppendPlaylist(StringBuilder builder, StreamState state, string url, int bitrate, string subtitleGroup)
|
|
{
|
|
var header = "#EXT-X-STREAM-INF:BANDWIDTH=" + bitrate.ToString(UsCulture) + ",AVERAGE-BANDWIDTH=" + bitrate.ToString(UsCulture);
|
|
|
|
// tvos wants resolution, codecs, framerate
|
|
//if (state.TargetFramerate.HasValue)
|
|
//{
|
|
// header += string.Format(",FRAME-RATE=\"{0}\"", state.TargetFramerate.Value.ToString(CultureInfo.InvariantCulture));
|
|
//}
|
|
|
|
if (!string.IsNullOrWhiteSpace(subtitleGroup))
|
|
{
|
|
header += string.Format(",SUBTITLES=\"{0}\"", subtitleGroup);
|
|
}
|
|
|
|
builder.AppendLine(header);
|
|
builder.AppendLine(url);
|
|
}
|
|
|
|
private int GetBitrateVariation(int bitrate)
|
|
{
|
|
// By default, vary by just 50k
|
|
var variation = 50000;
|
|
|
|
if (bitrate >= 10000000)
|
|
{
|
|
variation = 2000000;
|
|
}
|
|
else if (bitrate >= 5000000)
|
|
{
|
|
variation = 1500000;
|
|
}
|
|
else if (bitrate >= 3000000)
|
|
{
|
|
variation = 1000000;
|
|
}
|
|
else if (bitrate >= 2000000)
|
|
{
|
|
variation = 500000;
|
|
}
|
|
else if (bitrate >= 1000000)
|
|
{
|
|
variation = 300000;
|
|
}
|
|
else if (bitrate >= 600000)
|
|
{
|
|
variation = 200000;
|
|
}
|
|
else if (bitrate >= 400000)
|
|
{
|
|
variation = 100000;
|
|
}
|
|
|
|
return variation;
|
|
}
|
|
|
|
private async Task<object> GetVariantPlaylistInternal(StreamRequest request, bool isOutputVideo, string name)
|
|
{
|
|
var state = await GetState(request, CancellationToken.None).ConfigureAwait(false);
|
|
|
|
var segmentLengths = GetSegmentLengths(state);
|
|
|
|
var builder = new StringBuilder();
|
|
|
|
builder.AppendLine("#EXTM3U");
|
|
builder.AppendLine("#EXT-X-PLAYLIST-TYPE:VOD");
|
|
builder.AppendLine("#EXT-X-VERSION:3");
|
|
builder.AppendLine("#EXT-X-TARGETDURATION:" + Math.Ceiling(segmentLengths.Length > 0 ? segmentLengths.Max() : state.SegmentLength).ToString(UsCulture));
|
|
builder.AppendLine("#EXT-X-MEDIA-SEQUENCE:0");
|
|
|
|
var queryStringIndex = Request.RawUrl.IndexOf('?');
|
|
var queryString = queryStringIndex == -1 ? string.Empty : Request.RawUrl.Substring(queryStringIndex);
|
|
|
|
//if ((Request.UserAgent ?? string.Empty).IndexOf("roku", StringComparison.OrdinalIgnoreCase) != -1)
|
|
//{
|
|
// queryString = string.Empty;
|
|
//}
|
|
|
|
var index = 0;
|
|
|
|
foreach (var length in segmentLengths)
|
|
{
|
|
builder.AppendLine("#EXTINF:" + length.ToString("0.0000", UsCulture) + ", nodesc");
|
|
|
|
builder.AppendLine(string.Format("hls1/{0}/{1}{2}{3}",
|
|
|
|
name,
|
|
index.ToString(UsCulture),
|
|
GetSegmentFileExtension(request),
|
|
queryString));
|
|
|
|
index++;
|
|
}
|
|
|
|
builder.AppendLine("#EXT-X-ENDLIST");
|
|
|
|
var playlistText = builder.ToString();
|
|
|
|
return ResultFactory.GetResult(playlistText, MimeTypes.GetMimeType("playlist.m3u8"), new Dictionary<string, string>());
|
|
}
|
|
|
|
protected override string GetAudioArguments(StreamState state, EncodingOptions encodingOptions)
|
|
{
|
|
var audioCodec = EncodingHelper.GetAudioEncoder(state);
|
|
|
|
if (!state.IsOutputVideo)
|
|
{
|
|
if (string.Equals(audioCodec, "copy", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return "-acodec copy";
|
|
}
|
|
|
|
var audioTranscodeParams = new List<string>();
|
|
|
|
audioTranscodeParams.Add("-acodec " + audioCodec);
|
|
|
|
if (state.OutputAudioBitrate.HasValue)
|
|
{
|
|
audioTranscodeParams.Add("-ab " + state.OutputAudioBitrate.Value.ToString(UsCulture));
|
|
}
|
|
|
|
if (state.OutputAudioChannels.HasValue)
|
|
{
|
|
audioTranscodeParams.Add("-ac " + state.OutputAudioChannels.Value.ToString(UsCulture));
|
|
}
|
|
|
|
if (state.OutputAudioSampleRate.HasValue)
|
|
{
|
|
audioTranscodeParams.Add("-ar " + state.OutputAudioSampleRate.Value.ToString(UsCulture));
|
|
}
|
|
|
|
audioTranscodeParams.Add("-vn");
|
|
return string.Join(" ", audioTranscodeParams.ToArray());
|
|
}
|
|
|
|
if (string.Equals(audioCodec, "copy", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
var videoCodec = EncodingHelper.GetVideoEncoder(state, encodingOptions);
|
|
|
|
if (string.Equals(videoCodec, "copy", StringComparison.OrdinalIgnoreCase) && state.EnableBreakOnNonKeyFrames(videoCodec))
|
|
{
|
|
return "-codec:a:0 copy -copypriorss:a:0 0";
|
|
}
|
|
|
|
return "-codec:a:0 copy";
|
|
}
|
|
|
|
var args = "-codec:a:0 " + audioCodec;
|
|
|
|
var channels = state.OutputAudioChannels;
|
|
|
|
if (channels.HasValue)
|
|
{
|
|
args += " -ac " + channels.Value;
|
|
}
|
|
|
|
var bitrate = state.OutputAudioBitrate;
|
|
|
|
if (bitrate.HasValue)
|
|
{
|
|
args += " -ab " + bitrate.Value.ToString(UsCulture);
|
|
}
|
|
|
|
if (state.OutputAudioSampleRate.HasValue)
|
|
{
|
|
args += " -ar " + state.OutputAudioSampleRate.Value.ToString(UsCulture);
|
|
}
|
|
|
|
args += " " + EncodingHelper.GetAudioFilterParam(state, encodingOptions, true);
|
|
|
|
return args;
|
|
}
|
|
|
|
protected override string GetVideoArguments(StreamState state, EncodingOptions encodingOptions)
|
|
{
|
|
if (!state.IsOutputVideo)
|
|
{
|
|
return string.Empty;
|
|
}
|
|
|
|
var codec = EncodingHelper.GetVideoEncoder(state, encodingOptions);
|
|
|
|
var args = "-codec:v:0 " + codec;
|
|
|
|
// if (state.EnableMpegtsM2TsMode)
|
|
// {
|
|
// args += " -mpegts_m2ts_mode 1";
|
|
// }
|
|
|
|
// See if we can save come cpu cycles by avoiding encoding
|
|
if (string.Equals(codec, "copy", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
if (state.VideoStream != null && EncodingHelper.IsH264(state.VideoStream) && !string.Equals(state.VideoStream.NalLengthSize, "0", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
args += " -bsf:v h264_mp4toannexb";
|
|
}
|
|
|
|
//args += " -flags -global_header";
|
|
}
|
|
else
|
|
{
|
|
var keyFrameArg = string.Format(" -force_key_frames \"expr:gte(t,n_forced*{0})\"",
|
|
state.SegmentLength.ToString(UsCulture));
|
|
|
|
var hasGraphicalSubs = state.SubtitleStream != null && !state.SubtitleStream.IsTextSubtitleStream && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
|
|
|
|
args += " " + EncodingHelper.GetVideoQualityParam(state, codec, encodingOptions, GetDefaultH264Preset()) + keyFrameArg;
|
|
|
|
//args += " -mixed-refs 0 -refs 3 -x264opts b_pyramid=0:weightb=0:weightp=0";
|
|
|
|
// Add resolution params, if specified
|
|
if (!hasGraphicalSubs)
|
|
{
|
|
args += EncodingHelper.GetOutputSizeParam(state, encodingOptions, codec, true);
|
|
}
|
|
|
|
// This is for internal graphical subs
|
|
if (hasGraphicalSubs)
|
|
{
|
|
args += EncodingHelper.GetGraphicalSubtitleParam(state, encodingOptions, codec);
|
|
}
|
|
|
|
//args += " -flags -global_header";
|
|
}
|
|
|
|
if (args.IndexOf("-copyts", StringComparison.OrdinalIgnoreCase) == -1)
|
|
{
|
|
args += " -copyts";
|
|
}
|
|
|
|
if (!string.IsNullOrEmpty(state.OutputVideoSync))
|
|
{
|
|
args += " -vsync " + state.OutputVideoSync;
|
|
}
|
|
|
|
args += EncodingHelper.GetOutputFFlags(state);
|
|
|
|
return args;
|
|
}
|
|
|
|
protected override string GetCommandLineArguments(string outputPath, EncodingOptions encodingOptions, StreamState state, bool isEncoding)
|
|
{
|
|
var videoCodec = EncodingHelper.GetVideoEncoder(state, encodingOptions);
|
|
|
|
var threads = EncodingHelper.GetNumberOfThreads(state, encodingOptions, videoCodec);
|
|
|
|
var inputModifier = EncodingHelper.GetInputModifier(state, encodingOptions);
|
|
|
|
// If isEncoding is true we're actually starting ffmpeg
|
|
var startNumber = GetStartNumber(state);
|
|
var startNumberParam = isEncoding ? startNumber.ToString(UsCulture) : "0";
|
|
|
|
var mapArgs = state.IsOutputVideo ? EncodingHelper.GetMapArgs(state) : string.Empty;
|
|
|
|
var outputTsArg = Path.Combine(FileSystem.GetDirectoryName(outputPath), Path.GetFileNameWithoutExtension(outputPath)) + "%d" + GetSegmentFileExtension(state.Request);
|
|
|
|
var timeDeltaParam = string.Empty;
|
|
|
|
if (isEncoding && startNumber > 0)
|
|
{
|
|
var startTime = state.SegmentLength * startNumber;
|
|
timeDeltaParam = string.Format("-segment_time_delta -{0}", startTime);
|
|
}
|
|
|
|
var segmentFormat = GetSegmentFileExtension(state.Request).TrimStart('.');
|
|
if (string.Equals(segmentFormat, "ts", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
segmentFormat = "mpegts";
|
|
}
|
|
|
|
var breakOnNonKeyFrames = state.EnableBreakOnNonKeyFrames(videoCodec);
|
|
|
|
var breakOnNonKeyFramesArg = breakOnNonKeyFrames ? " -break_non_keyframes 1" : "";
|
|
|
|
return string.Format("{0} {1} -map_metadata -1 -map_chapters -1 -threads {2} {3} {4} {5} -f segment -max_delay 5000000 -avoid_negative_ts disabled -start_at_zero -segment_time {6} {10} -individual_header_trailer 0{12} -segment_format {11} -segment_list_type m3u8 -segment_start_number {7} -segment_list \"{8}\" -y \"{9}\"",
|
|
inputModifier,
|
|
EncodingHelper.GetInputArgument(state, encodingOptions),
|
|
threads,
|
|
mapArgs,
|
|
GetVideoArguments(state, encodingOptions),
|
|
GetAudioArguments(state, encodingOptions),
|
|
state.SegmentLength.ToString(UsCulture),
|
|
startNumberParam,
|
|
outputPath,
|
|
outputTsArg,
|
|
timeDeltaParam,
|
|
segmentFormat,
|
|
breakOnNonKeyFramesArg
|
|
).Trim();
|
|
}
|
|
}
|
|
}
|