jellyfin/Jellyfin.Api/Helpers/StreamingHelpers.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Jellyfin.Api.Models.StreamingDtos;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Devices;
using MediaBrowser.Controller.Dlna;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Controller.Net;
using MediaBrowser.Model.Dlna;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.IO;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Primitives;
using Microsoft.Net.Http.Headers;

namespace Jellyfin.Api.Helpers
{
    /// <summary>
    /// The streaming helpers.
    /// </summary>
    public static class StreamingHelpers
    {
        /// <summary>
        /// Gets the current streaming state.
        /// </summary>
        /// <param name="streamingRequest">The <see cref="StreamingRequestDto"/>.</param>
        /// <param name="httpRequest">The <see cref="HttpRequest"/>.</param>
        /// <param name="authorizationContext">Instance of the <see cref="IAuthorizationContext"/> interface.</param>
        /// <param name="mediaSourceManager">Instance of the <see cref="IMediaSourceManager"/> interface.</param>
        /// <param name="userManager">Instance of the <see cref="IUserManager"/> interface.</param>
        /// <param name="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
        /// <param name="serverConfigurationManager">Instance of the <see cref="IServerConfigurationManager"/> interface.</param>
        /// <param name="mediaEncoder">Instance of the <see cref="IMediaEncoder"/> interface.</param>
        /// <param name="fileSystem">Instance of the <see cref="IFileSystem"/> interface.</param>
        /// <param name="subtitleEncoder">Instance of the <see cref="ISubtitleEncoder"/> interface.</param>
        /// <param name="configuration">Instance of the <see cref="IConfiguration"/> interface.</param>
        /// <param name="dlnaManager">Instance of the <see cref="IDlnaManager"/> interface.</param>
        /// <param name="deviceManager">Instance of the <see cref="IDeviceManager"/> interface.</param>
        /// <param name="transcodingJobHelper">Initialized <see cref="TranscodingJobHelper"/>.</param>
        /// <param name="transcodingJobType">The <see cref="TranscodingJobType"/>.</param>
        /// <param name="cancellationToken">The <see cref="CancellationToken"/>.</param>
        /// <returns>A <see cref="Task"/> containing the current <see cref="StreamState"/>.</returns>
        public static async Task<StreamState> GetStreamingState(
            StreamingRequestDto streamingRequest,
            HttpRequest httpRequest,
            IAuthorizationContext authorizationContext,
            IMediaSourceManager mediaSourceManager,
            IUserManager userManager,
            ILibraryManager libraryManager,
            IServerConfigurationManager serverConfigurationManager,
            IMediaEncoder mediaEncoder,
            IFileSystem fileSystem,
            ISubtitleEncoder subtitleEncoder,
            IConfiguration configuration,
            IDlnaManager dlnaManager,
            IDeviceManager deviceManager,
            TranscodingJobHelper transcodingJobHelper,
            TranscodingJobType transcodingJobType,
            CancellationToken cancellationToken)
        {
            EncodingHelper encodingHelper = new EncodingHelper(mediaEncoder, fileSystem, subtitleEncoder, configuration);
            // Parse the DLNA time seek header
            if (!streamingRequest.StartTimeTicks.HasValue)
            {
                var timeSeek = httpRequest.Headers["TimeSeekRange.dlna.org"];

                streamingRequest.StartTimeTicks = ParseTimeSeekHeader(timeSeek.ToString());
            }

            if (!string.IsNullOrWhiteSpace(streamingRequest.Params))
            {
                ParseParams(streamingRequest);
            }

            streamingRequest.StreamOptions = ParseStreamOptions(httpRequest.Query);
            if (httpRequest.Path.Value == null)
            {
                throw new ResourceNotFoundException(nameof(httpRequest.Path));
            }

            var url = httpRequest.Path.Value.Split('.')[^1];

            if (string.IsNullOrEmpty(streamingRequest.AudioCodec))
            {
                streamingRequest.AudioCodec = encodingHelper.InferAudioCodec(url);
            }

            var enableDlnaHeaders = !string.IsNullOrWhiteSpace(streamingRequest.Params) ||
                                    string.Equals(httpRequest.Headers["GetContentFeatures.DLNA.ORG"], "1", StringComparison.OrdinalIgnoreCase);

            var state = new StreamState(mediaSourceManager, transcodingJobType, transcodingJobHelper)
            {
                Request = streamingRequest,
                RequestedUrl = url,
                UserAgent = httpRequest.Headers[HeaderNames.UserAgent],
                EnableDlnaHeaders = enableDlnaHeaders
            };

            var auth = authorizationContext.GetAuthorizationInfo(httpRequest);
            if (!auth.UserId.Equals(Guid.Empty))
            {
                state.User = userManager.GetUserById(auth.UserId);
            }

            if (state.IsVideoRequest && !string.IsNullOrWhiteSpace(state.Request.VideoCodec))
            {
                state.SupportedVideoCodecs = state.Request.VideoCodec.Split(',', StringSplitOptions.RemoveEmptyEntries);
                state.Request.VideoCodec = state.SupportedVideoCodecs.FirstOrDefault();
            }

            if (!string.IsNullOrWhiteSpace(streamingRequest.AudioCodec))
            {
                state.SupportedAudioCodecs = streamingRequest.AudioCodec.Split(',', StringSplitOptions.RemoveEmptyEntries);
                state.Request.AudioCodec = state.SupportedAudioCodecs.FirstOrDefault(i => mediaEncoder.CanEncodeToAudioCodec(i))
                                           ?? state.SupportedAudioCodecs.FirstOrDefault();
            }

            if (!string.IsNullOrWhiteSpace(streamingRequest.SubtitleCodec))
            {
                state.SupportedSubtitleCodecs = streamingRequest.SubtitleCodec.Split(',', StringSplitOptions.RemoveEmptyEntries);
                state.Request.SubtitleCodec = state.SupportedSubtitleCodecs.FirstOrDefault(i => mediaEncoder.CanEncodeToSubtitleCodec(i))
                                              ?? state.SupportedSubtitleCodecs.FirstOrDefault();
            }

            var item = libraryManager.GetItemById(streamingRequest.Id);

            state.IsInputVideo = string.Equals(item.MediaType, MediaType.Video, StringComparison.OrdinalIgnoreCase);

            MediaSourceInfo? mediaSource = null;
            if (string.IsNullOrWhiteSpace(streamingRequest.LiveStreamId))
            {
                var currentJob = !string.IsNullOrWhiteSpace(streamingRequest.PlaySessionId)
                    ? transcodingJobHelper.GetTranscodingJob(streamingRequest.PlaySessionId)
                    : null;

                if (currentJob != null)
                {
                    mediaSource = currentJob.MediaSource;
                }

                if (mediaSource == null)
                {
                    var mediaSources = await mediaSourceManager.GetPlaybackMediaSources(libraryManager.GetItemById(streamingRequest.Id), null, false, false, cancellationToken).ConfigureAwait(false);

                    mediaSource = string.IsNullOrEmpty(streamingRequest.MediaSourceId)
                        ? mediaSources[0]
                        : mediaSources.Find(i => string.Equals(i.Id, streamingRequest.MediaSourceId, StringComparison.InvariantCulture));

                    if (mediaSource == null && Guid.Parse(streamingRequest.MediaSourceId) == streamingRequest.Id)
                    {
                        mediaSource = mediaSources[0];
                    }
                }
            }
            else
            {
                var liveStreamInfo = await mediaSourceManager.GetLiveStreamWithDirectStreamProvider(streamingRequest.LiveStreamId, cancellationToken).ConfigureAwait(false);
                mediaSource = liveStreamInfo.Item1;
                state.DirectStreamProvider = liveStreamInfo.Item2;
            }

            var encodingOptions = serverConfigurationManager.GetEncodingOptions();

            encodingHelper.AttachMediaSourceInfo(state, encodingOptions, mediaSource, url);

            string? containerInternal = Path.GetExtension(state.RequestedUrl);

            if (!string.IsNullOrEmpty(streamingRequest.Container))
            {
                containerInternal = streamingRequest.Container;
            }

            if (string.IsNullOrEmpty(containerInternal))
            {
                containerInternal = streamingRequest.Static ?
                    StreamBuilder.NormalizeMediaSourceFormatIntoSingleContainer(state.InputContainer, null, DlnaProfileType.Audio)
                    : GetOutputFileExtension(state);
            }

            state.OutputContainer = (containerInternal ?? string.Empty).TrimStart('.');

            state.OutputAudioBitrate = encodingHelper.GetAudioBitrateParam(streamingRequest.AudioBitRate, streamingRequest.AudioCodec, state.AudioStream);

            state.OutputAudioCodec = streamingRequest.AudioCodec;

            state.OutputAudioChannels = encodingHelper.GetNumAudioChannelsParam(state, state.AudioStream, state.OutputAudioCodec);

            if (state.VideoRequest != null)
            {
                state.OutputVideoCodec = state.Request.VideoCodec;
                state.OutputVideoBitrate = encodingHelper.GetVideoBitrateParamValue(state.VideoRequest, state.VideoStream, state.OutputVideoCodec);

                encodingHelper.TryStreamCopy(state);

                if (!EncodingHelper.IsCopyCodec(state.OutputVideoCodec) && state.OutputVideoBitrate.HasValue)
                {
                    var isVideoResolutionNotRequested = !state.VideoRequest.Width.HasValue
                        && !state.VideoRequest.Height.HasValue
                        && !state.VideoRequest.MaxWidth.HasValue
                        && !state.VideoRequest.MaxHeight.HasValue;

                    if (isVideoResolutionNotRequested
                        && state.VideoStream != null
                        && state.VideoRequest.VideoBitRate.HasValue
                        && state.VideoStream.BitRate.HasValue
                        && state.VideoRequest.VideoBitRate.Value >= state.VideoStream.BitRate.Value)
                    {
                        // Don't downscale the resolution if the width/height/MaxWidth/MaxHeight is not requested,
                        // and the requested video bitrate is higher than source video bitrate.
                        if (state.VideoStream.Width.HasValue || state.VideoStream.Height.HasValue)
                        {
                            state.VideoRequest.MaxWidth = state.VideoStream?.Width;
                            state.VideoRequest.MaxHeight = state.VideoStream?.Height;
                        }
                    }
                    else
                    {
                        var resolution = ResolutionNormalizer.Normalize(
                            state.VideoStream?.BitRate,
                            state.VideoStream?.Width,
                            state.VideoStream?.Height,
                            state.OutputVideoBitrate.Value,
                            state.VideoStream?.Codec,
                            state.OutputVideoCodec,
                            state.VideoRequest.MaxWidth,
                            state.VideoRequest.MaxHeight);

                        state.VideoRequest.MaxWidth = resolution.MaxWidth;
                        state.VideoRequest.MaxHeight = resolution.MaxHeight;
                    }
                }
            }

            ApplyDeviceProfileSettings(state, dlnaManager, deviceManager, httpRequest, streamingRequest.DeviceProfileId, streamingRequest.Static);

            var ext = string.IsNullOrWhiteSpace(state.OutputContainer)
                ? GetOutputFileExtension(state)
                : ('.' + state.OutputContainer);

            state.OutputFilePath = GetOutputFilePath(state, ext!, serverConfigurationManager, streamingRequest.DeviceId, streamingRequest.PlaySessionId);

            return state;
        }

        /// <summary>
        /// Adds the dlna headers.
        /// </summary>
        /// <param name="state">The state.</param>
        /// <param name="responseHeaders">The response headers.</param>
        /// <param name="isStaticallyStreamed">if set to <c>true</c> [is statically streamed].</param>
        /// <param name="startTimeTicks">The start time in ticks.</param>
        /// <param name="request">The <see cref="HttpRequest"/>.</param>
        /// <param name="dlnaManager">Instance of the <see cref="IDlnaManager"/> interface.</param>
        public static void AddDlnaHeaders(
            StreamState state,
            IHeaderDictionary responseHeaders,
            bool isStaticallyStreamed,
            long? startTimeTicks,
            HttpRequest request,
            IDlnaManager dlnaManager)
        {
            if (!state.EnableDlnaHeaders)
            {
                return;
            }

            var profile = state.DeviceProfile;

            StringValues transferMode = request.Headers["transferMode.dlna.org"];
            responseHeaders.Add("transferMode.dlna.org", string.IsNullOrEmpty(transferMode) ? "Streaming" : transferMode.ToString());
            responseHeaders.Add("realTimeInfo.dlna.org", "DLNA.ORG_TLAG=*");

            if (state.RunTimeTicks.HasValue)
            {
                if (string.Equals(request.Headers["getMediaInfo.sec"], "1", StringComparison.OrdinalIgnoreCase))
                {
                    var ms = TimeSpan.FromTicks(state.RunTimeTicks.Value).TotalMilliseconds;
                    responseHeaders.Add("MediaInfo.sec", string.Format(
                        CultureInfo.InvariantCulture,
                        "SEC_Duration={0};",
                        Convert.ToInt32(ms)));
                }

                if (!isStaticallyStreamed && profile != null)
                {
                    AddTimeSeekResponseHeaders(state, responseHeaders, startTimeTicks);
                }
            }

            if (profile == null)
            {
                profile = dlnaManager.GetDefaultProfile();
            }

            var audioCodec = state.ActualOutputAudioCodec;

            if (!state.IsVideoRequest)
            {
                responseHeaders.Add("contentFeatures.dlna.org", new ContentFeatureBuilder(profile).BuildAudioHeader(
                    state.OutputContainer,
                    audioCodec,
                    state.OutputAudioBitrate,
                    state.OutputAudioSampleRate,
                    state.OutputAudioChannels,
                    state.OutputAudioBitDepth,
                    isStaticallyStreamed,
                    state.RunTimeTicks,
                    state.TranscodeSeekInfo));
            }
            else
            {
                var videoCodec = state.ActualOutputVideoCodec;

                responseHeaders.Add(
                    "contentFeatures.dlna.org",
                    new ContentFeatureBuilder(profile).BuildVideoHeader(state.OutputContainer, videoCodec, audioCodec, state.OutputWidth, state.OutputHeight, state.TargetVideoBitDepth, state.OutputVideoBitrate, state.TargetTimestamp, isStaticallyStreamed, state.RunTimeTicks, state.TargetVideoProfile, state.TargetVideoLevel, state.TargetFramerate, state.TargetPacketLength, state.TranscodeSeekInfo, state.IsTargetAnamorphic, state.IsTargetInterlaced, state.TargetRefFrames, state.TargetVideoStreamCount, state.TargetAudioStreamCount, state.TargetVideoCodecTag, state.IsTargetAVC).FirstOrDefault() ?? string.Empty);
            }
        }

        /// <summary>
        /// Parses the time seek header.
        /// </summary>
        /// <param name="value">The time seek header string.</param>
        /// <returns>A nullable <see cref="long"/> representing the seek time in ticks.</returns>
        private static long? ParseTimeSeekHeader(ReadOnlySpan<char> value)
        {
            if (value.IsEmpty)
            {
                return null;
            }

            const string npt = "npt=";
            if (!value.StartsWith(npt, StringComparison.OrdinalIgnoreCase))
            {
                throw new ArgumentException("Invalid timeseek header");
            }

            var index = value.IndexOf('-');
            value = index == -1
                ? value.Slice(npt.Length)
                : value.Slice(npt.Length, index - npt.Length);
            if (value.IndexOf(':') == -1)
            {
                // Parses npt times in the format of '417.33'
                if (double.TryParse(value, NumberStyles.Any, CultureInfo.InvariantCulture, out var seconds))
                {
                    return TimeSpan.FromSeconds(seconds).Ticks;
                }

                throw new ArgumentException("Invalid timeseek header");
            }

            try
            {
                // Parses npt times in the format of '10:19:25.7'
                return TimeSpan.Parse(value).Ticks;
            }
            catch
            {
                throw new ArgumentException("Invalid timeseek header");
            }
        }

        /// <summary>
        /// Parses query parameters as StreamOptions.
        /// </summary>
        /// <param name="queryString">The query string.</param>
        /// <returns>A <see cref="Dictionary{String,String}"/> containing the stream options.</returns>
        private static Dictionary<string, string> ParseStreamOptions(IQueryCollection queryString)
        {
            Dictionary<string, string> streamOptions = new Dictionary<string, string>();
            foreach (var param in queryString)
            {
                if (char.IsLower(param.Key[0]))
                {
                    // This was probably not parsed initially and should be a StreamOptions
                    // or the generated URL should correctly serialize it
                    // TODO: This should be incorporated either in the lower framework for parsing requests
                    streamOptions[param.Key] = param.Value;
                }
            }

            return streamOptions;
        }

        /// <summary>
        /// Adds the dlna time seek headers to the response.
        /// </summary>
        /// <param name="state">The current <see cref="StreamState"/>.</param>
        /// <param name="responseHeaders">The <see cref="IHeaderDictionary"/> of the response.</param>
        /// <param name="startTimeTicks">The start time in ticks.</param>
        private static void AddTimeSeekResponseHeaders(StreamState state, IHeaderDictionary responseHeaders, long? startTimeTicks)
        {
            var runtimeSeconds = TimeSpan.FromTicks(state.RunTimeTicks!.Value).TotalSeconds.ToString(CultureInfo.InvariantCulture);
            var startSeconds = TimeSpan.FromTicks(startTimeTicks ?? 0).TotalSeconds.ToString(CultureInfo.InvariantCulture);

            responseHeaders.Add("TimeSeekRange.dlna.org", string.Format(
                CultureInfo.InvariantCulture,
                "npt={0}-{1}/{1}",
                startSeconds,
                runtimeSeconds));
            responseHeaders.Add("X-AvailableSeekRange", string.Format(
                CultureInfo.InvariantCulture,
                "1 npt={0}-{1}",
                startSeconds,
                runtimeSeconds));
        }

        /// <summary>
        /// Gets the output file extension.
        /// </summary>
        /// <param name="state">The state.</param>
        /// <returns>System.String.</returns>
        private static string? GetOutputFileExtension(StreamState state)
        {
            var ext = Path.GetExtension(state.RequestedUrl);

            if (!string.IsNullOrEmpty(ext))
            {
                return ext;
            }

            // Try to infer based on the desired video codec
            if (state.IsVideoRequest)
            {
                var videoCodec = state.Request.VideoCodec;

                if (string.Equals(videoCodec, "h264", StringComparison.OrdinalIgnoreCase) ||
                    string.Equals(videoCodec, "h265", StringComparison.OrdinalIgnoreCase))
                {
                    return ".ts";
                }

                if (string.Equals(videoCodec, "theora", StringComparison.OrdinalIgnoreCase))
                {
                    return ".ogv";
                }

                if (string.Equals(videoCodec, "vpx", StringComparison.OrdinalIgnoreCase))
                {
                    return ".webm";
                }

                if (string.Equals(videoCodec, "wmv", StringComparison.OrdinalIgnoreCase))
                {
                    return ".asf";
                }
            }

            // Try to infer based on the desired audio codec
            if (!state.IsVideoRequest)
            {
                var audioCodec = state.Request.AudioCodec;

                if (string.Equals("aac", audioCodec, StringComparison.OrdinalIgnoreCase))
                {
                    return ".aac";
                }

                if (string.Equals("mp3", audioCodec, StringComparison.OrdinalIgnoreCase))
                {
                    return ".mp3";
                }

                if (string.Equals("vorbis", audioCodec, StringComparison.OrdinalIgnoreCase))
                {
                    return ".ogg";
                }

                if (string.Equals("wma", audioCodec, StringComparison.OrdinalIgnoreCase))
                {
                    return ".wma";
                }
            }

            return null;
        }

        /// <summary>
        /// Gets the output file path for transcoding.
        /// </summary>
        /// <param name="state">The current <see cref="StreamState"/>.</param>
        /// <param name="outputFileExtension">The file extension of the output file.</param>
        /// <param name="serverConfigurationManager">Instance of the <see cref="IServerConfigurationManager"/> interface.</param>
        /// <param name="deviceId">The device id.</param>
        /// <param name="playSessionId">The play session id.</param>
        /// <returns>The complete file path, including the folder, for the transcoding file.</returns>
        private static string GetOutputFilePath(StreamState state, string outputFileExtension, IServerConfigurationManager serverConfigurationManager, string? deviceId, string? playSessionId)
        {
            var data = $"{state.MediaPath}-{state.UserAgent}-{deviceId!}-{playSessionId!}";

            var filename = data.GetMD5().ToString("N", CultureInfo.InvariantCulture);
            var ext = outputFileExtension?.ToLowerInvariant();
            var folder = serverConfigurationManager.GetTranscodePath();

            return Path.Combine(folder, filename + ext);
        }

        private static void ApplyDeviceProfileSettings(StreamState state, IDlnaManager dlnaManager, IDeviceManager deviceManager, HttpRequest request, string? deviceProfileId, bool? @static)
        {
            var headers = request.Headers;

            if (!string.IsNullOrWhiteSpace(deviceProfileId))
            {
                state.DeviceProfile = dlnaManager.GetProfile(deviceProfileId);
            }
            else if (!string.IsNullOrWhiteSpace(deviceProfileId))
            {
                var caps = deviceManager.GetCapabilities(deviceProfileId);

                state.DeviceProfile = caps == null ? dlnaManager.GetProfile(headers) : caps.DeviceProfile;
            }

            var profile = state.DeviceProfile;

            if (profile == null)
            {
                // Don't use settings from the default profile.
                // Only use a specific profile if it was requested.
                return;
            }

            var audioCodec = state.ActualOutputAudioCodec;
            var videoCodec = state.ActualOutputVideoCodec;

            var mediaProfile = !state.IsVideoRequest
                ? profile.GetAudioMediaProfile(state.OutputContainer, audioCodec, state.OutputAudioChannels, state.OutputAudioBitrate, state.OutputAudioSampleRate, state.OutputAudioBitDepth)
                : profile.GetVideoMediaProfile(
                    state.OutputContainer,
                    audioCodec,
                    videoCodec,
                    state.OutputWidth,
                    state.OutputHeight,
                    state.TargetVideoBitDepth,
                    state.OutputVideoBitrate,
                    state.TargetVideoProfile,
                    state.TargetVideoLevel,
                    state.TargetFramerate,
                    state.TargetPacketLength,
                    state.TargetTimestamp,
                    state.IsTargetAnamorphic,
                    state.IsTargetInterlaced,
                    state.TargetRefFrames,
                    state.TargetVideoStreamCount,
                    state.TargetAudioStreamCount,
                    state.TargetVideoCodecTag,
                    state.IsTargetAVC);

            if (mediaProfile != null)
            {
                state.MimeType = mediaProfile.MimeType;
            }

            if (!(@static.HasValue && @static.Value))
            {
                var transcodingProfile = !state.IsVideoRequest ? profile.GetAudioTranscodingProfile(state.OutputContainer, audioCodec) : profile.GetVideoTranscodingProfile(state.OutputContainer, audioCodec, videoCodec);

                if (transcodingProfile != null)
                {
                    state.EstimateContentLength = transcodingProfile.EstimateContentLength;
                    // state.EnableMpegtsM2TsMode = transcodingProfile.EnableMpegtsM2TsMode;
                    state.TranscodeSeekInfo = transcodingProfile.TranscodeSeekInfo;

                    if (state.VideoRequest != null)
                    {
                        state.VideoRequest.CopyTimestamps = transcodingProfile.CopyTimestamps;
                        state.VideoRequest.EnableSubtitlesInManifest = transcodingProfile.EnableSubtitlesInManifest;
                    }
                }
            }
        }

        /// <summary>
        /// Parses the parameters.
        /// </summary>
        /// <param name="request">The request.</param>
        private static void ParseParams(StreamingRequestDto request)
        {
            if (string.IsNullOrEmpty(request.Params))
            {
                return;
            }

            var vals = request.Params.Split(';');

            var videoRequest = request as VideoRequestDto;

            for (var i = 0; i < vals.Length; i++)
            {
                var val = vals[i];

                if (string.IsNullOrWhiteSpace(val))
                {
                    continue;
                }

                switch (i)
                {
                    case 0:
                        request.DeviceProfileId = val;
                        break;
                    case 1:
                        request.DeviceId = val;
                        break;
                    case 2:
                        request.MediaSourceId = val;
                        break;
                    case 3:
                        request.Static = string.Equals("true", val, StringComparison.OrdinalIgnoreCase);
                        break;
                    case 4:
                        if (videoRequest != null)
                        {
                            videoRequest.VideoCodec = val;
                        }

                        break;
                    case 5:
                        request.AudioCodec = val;
                        break;
                    case 6:
                        if (videoRequest != null)
                        {
                            videoRequest.AudioStreamIndex = int.Parse(val, CultureInfo.InvariantCulture);
                        }

                        break;
                    case 7:
                        if (videoRequest != null)
                        {
                            videoRequest.SubtitleStreamIndex = int.Parse(val, CultureInfo.InvariantCulture);
                        }

                        break;
                    case 8:
                        if (videoRequest != null)
                        {
                            videoRequest.VideoBitRate = int.Parse(val, CultureInfo.InvariantCulture);
                        }

                        break;
                    case 9:
                        request.AudioBitRate = int.Parse(val, CultureInfo.InvariantCulture);
                        break;
                    case 10:
                        request.MaxAudioChannels = int.Parse(val, CultureInfo.InvariantCulture);
                        break;
                    case 11:
                        if (videoRequest != null)
                        {
                            videoRequest.MaxFramerate = float.Parse(val, CultureInfo.InvariantCulture);
                        }

                        break;
                    case 12:
                        if (videoRequest != null)
                        {
                            videoRequest.MaxWidth = int.Parse(val, CultureInfo.InvariantCulture);
                        }

                        break;
                    case 13:
                        if (videoRequest != null)
                        {
                            videoRequest.MaxHeight = int.Parse(val, CultureInfo.InvariantCulture);
                        }

                        break;
                    case 14:
                        request.StartTimeTicks = long.Parse(val, CultureInfo.InvariantCulture);
                        break;
                    case 15:
                        if (videoRequest != null)
                        {
                            videoRequest.Level = val;
                        }

                        break;
                    case 16:
                        if (videoRequest != null)
                        {
                            videoRequest.MaxRefFrames = int.Parse(val, CultureInfo.InvariantCulture);
                        }

                        break;
                    case 17:
                        if (videoRequest != null)
                        {
                            videoRequest.MaxVideoBitDepth = int.Parse(val, CultureInfo.InvariantCulture);
                        }

                        break;
                    case 18:
                        if (videoRequest != null)
                        {
                            videoRequest.Profile = val;
                        }

                        break;
                    case 19:
                        // cabac no longer used
                        break;
                    case 20:
                        request.PlaySessionId = val;
                        break;
                    case 21:
                        // api_key
                        break;
                    case 22:
                        request.LiveStreamId = val;
                        break;
                    case 23:
                        // Duplicating ItemId because of MediaMonkey
                        break;
                    case 24:
                        if (videoRequest != null)
                        {
                            videoRequest.CopyTimestamps = string.Equals("true", val, StringComparison.OrdinalIgnoreCase);
                        }

                        break;
                    case 25:
                        if (!string.IsNullOrWhiteSpace(val) && videoRequest != null)
                        {
                            if (Enum.TryParse(val, out SubtitleDeliveryMethod method))
                            {
                                videoRequest.SubtitleMethod = method;
                            }
                        }

                        break;
                    case 26:
                        request.TranscodingMaxAudioChannels = int.Parse(val, CultureInfo.InvariantCulture);
                        break;
                    case 27:
                        if (videoRequest != null)
                        {
                            videoRequest.EnableSubtitlesInManifest = string.Equals("true", val, StringComparison.OrdinalIgnoreCase);
                        }

                        break;
                    case 28:
                        request.Tag = val;
                        break;
                    case 29:
                        if (videoRequest != null)
                        {
                            videoRequest.RequireAvc = string.Equals("true", val, StringComparison.OrdinalIgnoreCase);
                        }

                        break;
                    case 30:
                        request.SubtitleCodec = val;
                        break;
                    case 31:
                        if (videoRequest != null)
                        {
                            videoRequest.RequireNonAnamorphic = string.Equals("true", val, StringComparison.OrdinalIgnoreCase);
                        }

                        break;
                    case 32:
                        if (videoRequest != null)
                        {
                            videoRequest.DeInterlace = string.Equals("true", val, StringComparison.OrdinalIgnoreCase);
                        }

                        break;
                    case 33:
                        request.TranscodeReasons = val;
                        break;
                }
            }
        }
    }
}