fixes #2121 - background roku thumbnail generation (or maybe... any scheduled task?) should be "niced"

Emby.Server.Implementations/MediaEncoder/EncodingManager.cs

@@ -142,7 +142,7 @@ namespace Emby.Server.Implementations.MediaEncoder
 
                             var container = video.Container;
 
-                            var tempFile = await _encoder.ExtractVideoImage(inputPath, container, protocol, video.Video3DFormat, time, cancellationToken).ConfigureAwait(false);
+                            var tempFile = await _encoder.ExtractVideoImage(inputPath, container, protocol, video.GetDefaultVideoStream(), video.Video3DFormat, time, cancellationToken).ConfigureAwait(false);
                             _fileSystem.CopyFile(tempFile, path, true);
 
                             try

MediaBrowser.Api/Playback/BaseStreamingService.cs

@@ -95,7 +95,7 @@ namespace MediaBrowser.Api.Playback
             LibraryManager = libraryManager;
             IsoManager = isoManager;
             MediaEncoder = mediaEncoder;
-            EncodingHelper = new EncodingHelper(MediaEncoder, serverConfig, FileSystem, SubtitleEncoder);
+            EncodingHelper = new EncodingHelper(MediaEncoder, FileSystem, SubtitleEncoder);
         }
 
         /// <summary>

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -4,7 +4,6 @@ using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Threading;
-using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Dlna;
 using MediaBrowser.Model.Dto;
@@ -19,14 +18,12 @@ namespace MediaBrowser.Controller.MediaEncoding
         private readonly CultureInfo _usCulture = new CultureInfo("en-US");
 
         private readonly IMediaEncoder _mediaEncoder;
-        private readonly IServerConfigurationManager _config;
         private readonly IFileSystem _fileSystem;
         private readonly ISubtitleEncoder _subtitleEncoder;
 
-        public EncodingHelper(IMediaEncoder mediaEncoder, IServerConfigurationManager config, IFileSystem fileSystem, ISubtitleEncoder subtitleEncoder)
+        public EncodingHelper(IMediaEncoder mediaEncoder, IFileSystem fileSystem, ISubtitleEncoder subtitleEncoder)
         {
             _mediaEncoder = mediaEncoder;
-            _config = config;
             _fileSystem = fileSystem;
             _subtitleEncoder = subtitleEncoder;
         }
@@ -1771,29 +1768,34 @@ namespace MediaBrowser.Controller.MediaEncoding
                 return null;
             }
 
+            return GetVideoDecoder(state.MediaSource.VideoType ?? VideoType.VideoFile, state.VideoStream, encodingOptions);
+        }
+
+        public string GetVideoDecoder(VideoType videoType, MediaStream videoStream, EncodingOptions encodingOptions)
+        {
             // Only use alternative encoders for video files.
             // When using concat with folder rips, if the mfx session fails to initialize, ffmpeg will be stuck retrying and will not exit gracefully
             // Since transcoding of folder rips is expiremental anyway, it's not worth adding additional variables such as this.
-            if (state.VideoType != VideoType.VideoFile)
+            if (videoType != VideoType.VideoFile)
             {
                 return null;
             }
 
-            if (state.VideoStream != null && 
-                !string.IsNullOrWhiteSpace(state.VideoStream.Codec) && 
+            if (videoStream != null &&
+                !string.IsNullOrWhiteSpace(videoStream.Codec) &&
                 !string.IsNullOrWhiteSpace(encodingOptions.HardwareAccelerationType) &&
                 encodingOptions.EnableHardwareDecoding)
             {
                 if (string.Equals(encodingOptions.HardwareAccelerationType, "qsv", StringComparison.OrdinalIgnoreCase))
                 {
-                    switch (state.MediaSource.VideoStream.Codec.ToLower())
+                    switch (videoStream.Codec.ToLower())
                     {
                         case "avc":
                         case "h264":
                             if (_mediaEncoder.SupportsDecoder("h264_qsv"))
                             {
                                 // qsv decoder does not support 10-bit input
-                                if ((state.VideoStream.BitDepth ?? 8) > 8)
+                                if ((videoStream.BitDepth ?? 8) > 8)
                                 {
                                     return null;
                                 }
@@ -1824,7 +1826,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
                 else if (string.Equals(encodingOptions.HardwareAccelerationType, "nvenc", StringComparison.OrdinalIgnoreCase))
                 {
-                    switch (state.MediaSource.VideoStream.Codec.ToLower())
+                    switch (videoStream.Codec.ToLower())
                     {
                         case "avc":
                         case "h264":

MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs

@@ -39,29 +39,16 @@ namespace MediaBrowser.Controller.MediaEncoding
         /// <summary>
         /// Extracts the video image.
         /// </summary>
-        /// <param name="inputFiles">The input files.</param>
-        /// <param name="protocol">The protocol.</param>
-        /// <param name="threedFormat">The threed format.</param>
-        /// <param name="offset">The offset.</param>
-        /// <param name="cancellationToken">The cancellation token.</param>
-        /// <returns>Task{Stream}.</returns>
-        Task<string> ExtractVideoImage(string[] inputFiles, string container, MediaProtocol protocol, Video3DFormat? threedFormat, TimeSpan? offset, CancellationToken cancellationToken);
+        Task<string> ExtractVideoImage(string[] inputFiles, string container, MediaProtocol protocol, MediaStream videoStream, Video3DFormat? threedFormat, TimeSpan? offset, CancellationToken cancellationToken);
 
-        Task<string> ExtractVideoImage(string[] inputFiles, string container, MediaProtocol protocol, int? imageStreamIndex, CancellationToken cancellationToken);
+        Task<string> ExtractVideoImage(string[] inputFiles, string container, MediaProtocol protocol, MediaStream imageStream, int? imageStreamIndex, CancellationToken cancellationToken);
 
         /// <summary>
         /// Extracts the video images on interval.
         /// </summary>
-        /// <param name="inputFiles">The input files.</param>
-        /// <param name="protocol">The protocol.</param>
-        /// <param name="threedFormat">The threed format.</param>
-        /// <param name="interval">The interval.</param>
-        /// <param name="targetDirectory">The target directory.</param>
-        /// <param name="filenamePrefix">The filename prefix.</param>
-        /// <param name="maxWidth">The maximum width.</param>
-        /// <param name="cancellationToken">The cancellation token.</param>
-        /// <returns>Task.</returns>
         Task ExtractVideoImagesOnInterval(string[] inputFiles,
+            string container,
+            MediaStream videoStream,
             MediaProtocol protocol,
             Video3DFormat? threedFormat,
             TimeSpan interval,

MediaBrowser.MediaEncoding/Encoder/BaseEncoder.cs

@@ -59,7 +59,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
             MediaSourceManager = mediaSourceManager;
             ProcessFactory = processFactory;
 
-            EncodingHelper = new EncodingHelper(MediaEncoder, ConfigurationManager, FileSystem, SubtitleEncoder);
+            EncodingHelper = new EncodingHelper(MediaEncoder, FileSystem, SubtitleEncoder);
         }
 
         public async Task<EncodingJob> Start(EncodingJobOptions options,

MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs

@@ -615,20 +615,20 @@ namespace MediaBrowser.MediaEncoding.Encoder
 
         public Task<string> ExtractAudioImage(string path, int? imageStreamIndex, CancellationToken cancellationToken)
         {
-            return ExtractImage(new[] { path }, null, imageStreamIndex, MediaProtocol.File, true, null, null, cancellationToken);
+            return ExtractImage(new[] { path }, null, null, imageStreamIndex, MediaProtocol.File, true, null, null, cancellationToken);
         }
 
-        public Task<string> ExtractVideoImage(string[] inputFiles, string container, MediaProtocol protocol, Video3DFormat? threedFormat, TimeSpan? offset, CancellationToken cancellationToken)
+        public Task<string> ExtractVideoImage(string[] inputFiles, string container, MediaProtocol protocol, MediaStream videoStream, Video3DFormat? threedFormat, TimeSpan? offset, CancellationToken cancellationToken)
         {
-            return ExtractImage(inputFiles, container, null, protocol, false, threedFormat, offset, cancellationToken);
+            return ExtractImage(inputFiles, container, videoStream, null, protocol, false, threedFormat, offset, cancellationToken);
         }
 
-        public Task<string> ExtractVideoImage(string[] inputFiles, string container, MediaProtocol protocol, int? imageStreamIndex, CancellationToken cancellationToken)
+        public Task<string> ExtractVideoImage(string[] inputFiles, string container, MediaProtocol protocol, MediaStream imageStream, int? imageStreamIndex, CancellationToken cancellationToken)
         {
-            return ExtractImage(inputFiles, container, imageStreamIndex, protocol, false, null, null, cancellationToken);
+            return ExtractImage(inputFiles, container, imageStream, imageStreamIndex, protocol, false, null, null, cancellationToken);
         }
 
-        private async Task<string> ExtractImage(string[] inputFiles, string container, int? imageStreamIndex, MediaProtocol protocol, bool isAudio,
+        private async Task<string> ExtractImage(string[] inputFiles, string container, MediaStream videoStream, int? imageStreamIndex, MediaProtocol protocol, bool isAudio,
             Video3DFormat? threedFormat, TimeSpan? offset, CancellationToken cancellationToken)
         {
             var inputArgument = GetInputArgument(inputFiles, protocol);
@@ -645,7 +645,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
             {
                 try
                 {
-                    return await ExtractImageInternal(inputArgument, container, imageStreamIndex, protocol, threedFormat, offset, true, cancellationToken).ConfigureAwait(false);
+                    return await ExtractImageInternal(inputArgument, container, videoStream, imageStreamIndex, threedFormat, offset, true, cancellationToken).ConfigureAwait(false);
                 }
                 catch (ArgumentException)
                 {
@@ -657,10 +657,10 @@ namespace MediaBrowser.MediaEncoding.Encoder
                 }
             }
 
-            return await ExtractImageInternal(inputArgument, container, imageStreamIndex, protocol, threedFormat, offset, false, cancellationToken).ConfigureAwait(false);
+            return await ExtractImageInternal(inputArgument, container, videoStream, imageStreamIndex, threedFormat, offset, false, cancellationToken).ConfigureAwait(false);
         }
 
-        private async Task<string> ExtractImageInternal(string inputPath, string container, int? imageStreamIndex, MediaProtocol protocol, Video3DFormat? threedFormat, TimeSpan? offset, bool useIFrame, CancellationToken cancellationToken)
+        private async Task<string> ExtractImageInternal(string inputPath, string container, MediaStream videoStream, int? imageStreamIndex, Video3DFormat? threedFormat, TimeSpan? offset, bool useIFrame, CancellationToken cancellationToken)
         {
             if (string.IsNullOrEmpty(inputPath))
             {
@@ -698,7 +698,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
                         break;
                 }
             }
-
+            
             var mapArg = imageStreamIndex.HasValue ? (" -map 0:v:" + imageStreamIndex.Value.ToString(CultureInfo.InvariantCulture)) : string.Empty;
 
             var enableThumbnail = !new List<string> { "wtv" }.Contains(container ?? string.Empty, StringComparer.OrdinalIgnoreCase);
@@ -726,6 +726,25 @@ namespace MediaBrowser.MediaEncoding.Encoder
                 args = string.Format("-ss {0} ", GetTimeParameter(offset.Value)) + args;
             }
 
+            var encodinghelper = new EncodingHelper(this, FileSystem, SubtitleEncoder());
+            if (videoStream != null)
+            {
+                var decoder = encodinghelper.GetVideoDecoder(VideoType.VideoFile, videoStream, GetEncodingOptions());
+                if (!string.IsNullOrWhiteSpace(decoder))
+                {
+                    args = decoder + " " + args;
+                }
+            }
+
+            if (!string.IsNullOrWhiteSpace(container))
+            {
+                var inputFormat = encodinghelper.GetInputFormat(container);
+                if (!string.IsNullOrWhiteSpace(inputFormat))
+                {
+                    args = "-f " + inputFormat + " " + args;
+                }
+            }
+
             var process = _processFactory.Create(new ProcessOptions
             {
                 CreateNoWindow = true,
@@ -786,6 +805,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
         }
 
         public async Task ExtractVideoImagesOnInterval(string[] inputFiles,
+            string container,
+            MediaStream videoStream,
             MediaProtocol protocol,
             Video3DFormat? threedFormat,
             TimeSpan interval,
@@ -825,6 +846,25 @@ namespace MediaBrowser.MediaEncoding.Encoder
                 args = analyzeDurationArgument + " " + args;
             }
 
+            var encodinghelper = new EncodingHelper(this, FileSystem, SubtitleEncoder());
+            if (videoStream != null)
+            {
+                var decoder = encodinghelper.GetVideoDecoder(VideoType.VideoFile, videoStream, GetEncodingOptions());
+                if (!string.IsNullOrWhiteSpace(decoder))
+                {
+                    args = decoder + " " + args;
+                }
+            }
+
+            if (!string.IsNullOrWhiteSpace(container))
+            {
+                var inputFormat = encodinghelper.GetInputFormat(container);
+                if (!string.IsNullOrWhiteSpace(inputFormat))
+                {
+                    args = "-f " + inputFormat + " " + args;
+                }
+            }
+
             var process = _processFactory.Create(new ProcessOptions
             {
                 CreateNoWindow = true,

MediaBrowser.Providers/MediaInfo/VideoImageProvider.cs

@@ -133,7 +133,7 @@ namespace MediaBrowser.Providers.MediaInfo
                         }
                     }
 
-                    extractedImagePath = await _mediaEncoder.ExtractVideoImage(inputPath, item.Container, protocol, videoIndex, cancellationToken).ConfigureAwait(false);
+                    extractedImagePath = await _mediaEncoder.ExtractVideoImage(inputPath, item.Container, protocol, imageStream, videoIndex, cancellationToken).ConfigureAwait(false);
                 }
                 else
                 {
@@ -144,7 +144,9 @@ namespace MediaBrowser.Providers.MediaInfo
                                           ? TimeSpan.FromTicks(Convert.ToInt64(item.RunTimeTicks.Value * .1))
                                           : TimeSpan.FromSeconds(10);
 
-                    extractedImagePath = await _mediaEncoder.ExtractVideoImage(inputPath, item.Container, protocol, item.Video3DFormat, imageOffset, cancellationToken).ConfigureAwait(false);
+                    var videoStream = mediaStreams.FirstOrDefault(i => i.Type == MediaStreamType.Video);
+
+                    extractedImagePath = await _mediaEncoder.ExtractVideoImage(inputPath, item.Container, protocol, videoStream, item.Video3DFormat, imageOffset, cancellationToken).ConfigureAwait(false);
                 }
 
                 return new DynamicImageResponse