added encoding manager interface

5 files changed, 834 insertions, 0 deletions

diff --git a/MediaBrowser.Controller/MediaEncoding/ChapterImageRefreshOptions.cs b/MediaBrowser.Controller/MediaEncoding/ChapterImageRefreshOptions.cs
new file mode 100644
index 000000000..e11bd6cdf
--- /dev/null
+++ b/MediaBrowser.Controller/MediaEncoding/ChapterImageRefreshOptions.cs
@@ -0,0 +1,17 @@
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Model.Entities;
+using System.Collections.Generic;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    public class ChapterImageRefreshOptions
+    {
+        public Video Video { get; set; }
+
+        public List<ChapterInfo> Chapters { get; set; }
+
+        public bool SaveChapters { get; set; }
+
+        public bool ExtractImages { get; set; }
+    }
+}
diff --git a/MediaBrowser.Controller/MediaEncoding/IEncodingManager.cs b/MediaBrowser.Controller/MediaEncoding/IEncodingManager.cs
new file mode 100644
index 000000000..d1e40e3f0
--- /dev/null
+++ b/MediaBrowser.Controller/MediaEncoding/IEncodingManager.cs
@@ -0,0 +1,33 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    public interface IEncodingManager
+    {
+        /// <summary>
+        /// Gets the subtitle cache path.
+        /// </summary>
+        /// <param name="originalSubtitlePath">The original subtitle path.</param>
+        /// <param name="outputSubtitleExtension">The output subtitle extension.</param>
+        /// <returns>System.String.</returns>
+        string GetSubtitleCachePath(string originalSubtitlePath, string outputSubtitleExtension);
+
+        /// <summary>
+        /// Gets the subtitle cache path.
+        /// </summary>
+        /// <param name="mediaPath">The media path.</param>
+        /// <param name="subtitleStreamIndex">Index of the subtitle stream.</param>
+        /// <param name="outputSubtitleExtension">The output subtitle extension.</param>
+        /// <returns>System.String.</returns>
+        string GetSubtitleCachePath(string mediaPath, int subtitleStreamIndex, string outputSubtitleExtension);
+
+        /// <summary>
+        /// Refreshes the chapter images.
+        /// </summary>
+        /// <param name="options">The options.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task{System.Boolean}.</returns>
+        Task<bool> RefreshChapterImages(ChapterImageRefreshOptions options, CancellationToken cancellationToken);
+    }
+}
diff --git a/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs b/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs
new file mode 100644
index 000000000..119688fa7
--- /dev/null
+++ b/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs
@@ -0,0 +1,108 @@
+using MediaBrowser.Model.Entities;
+using System;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    /// <summary>
+    /// Interface IMediaEncoder
+    /// </summary>
+    public interface IMediaEncoder
+    {
+        /// <summary>
+        /// Gets the encoder path.
+        /// </summary>
+        /// <value>The encoder path.</value>
+        string EncoderPath { get; }
+
+        /// <summary>
+        /// Gets the version.
+        /// </summary>
+        /// <value>The version.</value>
+        string Version { get; }
+
+        /// <summary>
+        /// Extracts the image.
+        /// </summary>
+        /// <param name="inputFiles">The input files.</param>
+        /// <param name="type">The type.</param>
+        /// <param name="isAudio">if set to <c>true</c> [is audio].</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<Stream> ExtractImage(string[] inputFiles, InputType type, bool isAudio, Video3DFormat? threedFormat, TimeSpan? offset, CancellationToken cancellationToken);
+        
+        /// <summary>
+        /// Extracts the text subtitle.
+        /// </summary>
+        /// <param name="inputFiles">The input files.</param>
+        /// <param name="type">The type.</param>
+        /// <param name="subtitleStreamIndex">Index of the subtitle stream.</param>
+        /// <param name="copySubtitleStream">if set to true, copy stream instead of converting.</param>
+        /// <param name="outputPath">The output path.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task ExtractTextSubtitle(string[] inputFiles, InputType type, int subtitleStreamIndex, bool copySubtitleStream, string outputPath, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Converts the text subtitle to ass.
+        /// </summary>
+        /// <param name="inputPath">The input path.</param>
+        /// <param name="outputPath">The output path.</param>
+        /// <param name="language">The language.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task ConvertTextSubtitleToAss(string inputPath, string outputPath, string language, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Gets the media info.
+        /// </summary>
+        /// <param name="inputFiles">The input files.</param>
+        /// <param name="type">The type.</param>
+        /// <param name="isAudio">if set to <c>true</c> [is audio].</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task<InternalMediaInfoResult> GetMediaInfo(string[] inputFiles, InputType type, bool isAudio, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Gets the probe size argument.
+        /// </summary>
+        /// <param name="type">The type.</param>
+        /// <returns>System.String.</returns>
+        string GetProbeSizeArgument(InputType type);
+
+        /// <summary>
+        /// Gets the input argument.
+        /// </summary>
+        /// <param name="inputFiles">The input files.</param>
+        /// <param name="type">The type.</param>
+        /// <returns>System.String.</returns>
+        string GetInputArgument(string[] inputFiles, InputType type);
+    }
+
+    /// <summary>
+    /// Enum InputType
+    /// </summary>
+    public enum InputType
+    {
+        /// <summary>
+        /// The file
+        /// </summary>
+        File,
+        /// <summary>
+        /// The bluray
+        /// </summary>
+        Bluray,
+        /// <summary>
+        /// The DVD
+        /// </summary>
+        Dvd,
+        /// <summary>
+        /// The URL
+        /// </summary>
+        Url
+    }
+}
diff --git a/MediaBrowser.Controller/MediaEncoding/InternalMediaInfoResult.cs b/MediaBrowser.Controller/MediaEncoding/InternalMediaInfoResult.cs
new file mode 100644
index 000000000..e113521ec
--- /dev/null
+++ b/MediaBrowser.Controller/MediaEncoding/InternalMediaInfoResult.cs
@@ -0,0 +1,311 @@
+using MediaBrowser.Model.Entities;
+using System.Collections.Generic;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    /// <summary>
+    /// Class MediaInfoResult
+    /// </summary>
+    public class InternalMediaInfoResult
+    {
+        /// <summary>
+        /// Gets or sets the streams.
+        /// </summary>
+        /// <value>The streams.</value>
+        public MediaStreamInfo[] streams { get; set; }
+
+        /// <summary>
+        /// Gets or sets the format.
+        /// </summary>
+        /// <value>The format.</value>
+        public MediaFormatInfo format { get; set; }
+
+        /// <summary>
+        /// Gets or sets the chapters.
+        /// </summary>
+        /// <value>The chapters.</value>
+        public List<ChapterInfo> Chapters { get; set; }
+    }
+
+    /// <summary>
+    /// Represents a stream within the output
+    /// </summary>
+    public class MediaStreamInfo
+    {
+        /// <summary>
+        /// Gets or sets the index.
+        /// </summary>
+        /// <value>The index.</value>
+        public int index { get; set; }
+
+        /// <summary>
+        /// Gets or sets the profile.
+        /// </summary>
+        /// <value>The profile.</value>
+        public string profile { get; set; }
+
+        /// <summary>
+        /// Gets or sets the codec_name.
+        /// </summary>
+        /// <value>The codec_name.</value>
+        public string codec_name { get; set; }
+
+        /// <summary>
+        /// Gets or sets the codec_long_name.
+        /// </summary>
+        /// <value>The codec_long_name.</value>
+        public string codec_long_name { get; set; }
+
+        /// <summary>
+        /// Gets or sets the codec_type.
+        /// </summary>
+        /// <value>The codec_type.</value>
+        public string codec_type { get; set; }
+
+        /// <summary>
+        /// Gets or sets the sample_rate.
+        /// </summary>
+        /// <value>The sample_rate.</value>
+        public string sample_rate { get; set; }
+
+        /// <summary>
+        /// Gets or sets the channels.
+        /// </summary>
+        /// <value>The channels.</value>
+        public int channels { get; set; }
+
+        /// <summary>
+        /// Gets or sets the channel_layout.
+        /// </summary>
+        /// <value>The channel_layout.</value>
+        public string channel_layout { get; set; }
+        
+        /// <summary>
+        /// Gets or sets the avg_frame_rate.
+        /// </summary>
+        /// <value>The avg_frame_rate.</value>
+        public string avg_frame_rate { get; set; }
+
+        /// <summary>
+        /// Gets or sets the duration.
+        /// </summary>
+        /// <value>The duration.</value>
+        public string duration { get; set; }
+
+        /// <summary>
+        /// Gets or sets the bit_rate.
+        /// </summary>
+        /// <value>The bit_rate.</value>
+        public string bit_rate { get; set; }
+
+        /// <summary>
+        /// Gets or sets the width.
+        /// </summary>
+        /// <value>The width.</value>
+        public int width { get; set; }
+
+        /// <summary>
+        /// Gets or sets the height.
+        /// </summary>
+        /// <value>The height.</value>
+        public int height { get; set; }
+
+        /// <summary>
+        /// Gets or sets the display_aspect_ratio.
+        /// </summary>
+        /// <value>The display_aspect_ratio.</value>
+        public string display_aspect_ratio { get; set; }
+
+        /// <summary>
+        /// Gets or sets the tags.
+        /// </summary>
+        /// <value>The tags.</value>
+        public Dictionary<string, string> tags { get; set; }
+
+        /// <summary>
+        /// Gets or sets the bits_per_sample.
+        /// </summary>
+        /// <value>The bits_per_sample.</value>
+        public int bits_per_sample { get; set; }
+
+        /// <summary>
+        /// Gets or sets the r_frame_rate.
+        /// </summary>
+        /// <value>The r_frame_rate.</value>
+        public string r_frame_rate { get; set; }
+
+        /// <summary>
+        /// Gets or sets the has_b_frames.
+        /// </summary>
+        /// <value>The has_b_frames.</value>
+        public int has_b_frames { get; set; }
+
+        /// <summary>
+        /// Gets or sets the sample_aspect_ratio.
+        /// </summary>
+        /// <value>The sample_aspect_ratio.</value>
+        public string sample_aspect_ratio { get; set; }
+
+        /// <summary>
+        /// Gets or sets the pix_fmt.
+        /// </summary>
+        /// <value>The pix_fmt.</value>
+        public string pix_fmt { get; set; }
+
+        /// <summary>
+        /// Gets or sets the level.
+        /// </summary>
+        /// <value>The level.</value>
+        public int level { get; set; }
+
+        /// <summary>
+        /// Gets or sets the time_base.
+        /// </summary>
+        /// <value>The time_base.</value>
+        public string time_base { get; set; }
+
+        /// <summary>
+        /// Gets or sets the start_time.
+        /// </summary>
+        /// <value>The start_time.</value>
+        public string start_time { get; set; }
+
+        /// <summary>
+        /// Gets or sets the codec_time_base.
+        /// </summary>
+        /// <value>The codec_time_base.</value>
+        public string codec_time_base { get; set; }
+
+        /// <summary>
+        /// Gets or sets the codec_tag.
+        /// </summary>
+        /// <value>The codec_tag.</value>
+        public string codec_tag { get; set; }
+
+        /// <summary>
+        /// Gets or sets the codec_tag_string.
+        /// </summary>
+        /// <value>The codec_tag_string.</value>
+        public string codec_tag_string { get; set; }
+
+        /// <summary>
+        /// Gets or sets the sample_fmt.
+        /// </summary>
+        /// <value>The sample_fmt.</value>
+        public string sample_fmt { get; set; }
+
+        /// <summary>
+        /// Gets or sets the dmix_mode.
+        /// </summary>
+        /// <value>The dmix_mode.</value>
+        public string dmix_mode { get; set; }
+
+        /// <summary>
+        /// Gets or sets the start_pts.
+        /// </summary>
+        /// <value>The start_pts.</value>
+        public string start_pts { get; set; }
+
+        /// <summary>
+        /// Gets or sets the is_avc.
+        /// </summary>
+        /// <value>The is_avc.</value>
+        public string is_avc { get; set; }
+
+        /// <summary>
+        /// Gets or sets the nal_length_size.
+        /// </summary>
+        /// <value>The nal_length_size.</value>
+        public string nal_length_size { get; set; }
+
+        /// <summary>
+        /// Gets or sets the ltrt_cmixlev.
+        /// </summary>
+        /// <value>The ltrt_cmixlev.</value>
+        public string ltrt_cmixlev { get; set; }
+
+        /// <summary>
+        /// Gets or sets the ltrt_surmixlev.
+        /// </summary>
+        /// <value>The ltrt_surmixlev.</value>
+        public string ltrt_surmixlev { get; set; }
+
+        /// <summary>
+        /// Gets or sets the loro_cmixlev.
+        /// </summary>
+        /// <value>The loro_cmixlev.</value>
+        public string loro_cmixlev { get; set; }
+
+        /// <summary>
+        /// Gets or sets the loro_surmixlev.
+        /// </summary>
+        /// <value>The loro_surmixlev.</value>
+        public string loro_surmixlev { get; set; }
+
+        /// <summary>
+        /// Gets or sets the disposition.
+        /// </summary>
+        /// <value>The disposition.</value>
+        public Dictionary<string, string> disposition { get; set; }
+    }
+
+    /// <summary>
+    /// Class MediaFormat
+    /// </summary>
+    public class MediaFormatInfo
+    {
+        /// <summary>
+        /// Gets or sets the filename.
+        /// </summary>
+        /// <value>The filename.</value>
+        public string filename { get; set; }
+
+        /// <summary>
+        /// Gets or sets the nb_streams.
+        /// </summary>
+        /// <value>The nb_streams.</value>
+        public int nb_streams { get; set; }
+
+        /// <summary>
+        /// Gets or sets the format_name.
+        /// </summary>
+        /// <value>The format_name.</value>
+        public string format_name { get; set; }
+
+        /// <summary>
+        /// Gets or sets the format_long_name.
+        /// </summary>
+        /// <value>The format_long_name.</value>
+        public string format_long_name { get; set; }
+
+        /// <summary>
+        /// Gets or sets the start_time.
+        /// </summary>
+        /// <value>The start_time.</value>
+        public string start_time { get; set; }
+
+        /// <summary>
+        /// Gets or sets the duration.
+        /// </summary>
+        /// <value>The duration.</value>
+        public string duration { get; set; }
+
+        /// <summary>
+        /// Gets or sets the size.
+        /// </summary>
+        /// <value>The size.</value>
+        public string size { get; set; }
+
+        /// <summary>
+        /// Gets or sets the bit_rate.
+        /// </summary>
+        /// <value>The bit_rate.</value>
+        public string bit_rate { get; set; }
+
+        /// <summary>
+        /// Gets or sets the tags.
+        /// </summary>
+        /// <value>The tags.</value>
+        public Dictionary<string, string> tags { get; set; }
+    }
+}
diff --git a/MediaBrowser.Controller/MediaEncoding/MediaEncoderHelpers.cs b/MediaBrowser.Controller/MediaEncoding/MediaEncoderHelpers.cs
new file mode 100644
index 000000000..b2b9e2af3
--- /dev/null
+++ b/MediaBrowser.Controller/MediaEncoding/MediaEncoderHelpers.cs
@@ -0,0 +1,365 @@
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.IO;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+
+namespace MediaBrowser.Controller.MediaEncoding
+{
+    /// <summary>
+    /// Class MediaEncoderHelpers
+    /// </summary>
+    public static class MediaEncoderHelpers
+    {
+        /// <summary>
+        /// Gets the input argument.
+        /// </summary>
+        /// <param name="videoPath">The video path.</param>
+        /// <param name="isRemote">if set to <c>true</c> [is remote].</param>
+        /// <param name="videoType">Type of the video.</param>
+        /// <param name="isoType">Type of the iso.</param>
+        /// <param name="isoMount">The iso mount.</param>
+        /// <param name="playableStreamFileNames">The playable stream file names.</param>
+        /// <param name="type">The type.</param>
+        /// <returns>System.String[][].</returns>
+        public static string[] GetInputArgument(string videoPath, bool isRemote, VideoType videoType, IsoType? isoType, IIsoMount isoMount, IEnumerable<string> playableStreamFileNames, out InputType type)
+        {
+            var inputPath = isoMount == null ? new[] { videoPath } : new[] { isoMount.MountedPath };
+
+            type = InputType.File;
+
+            switch (videoType)
+            {
+                case VideoType.BluRay:
+                    type = InputType.Bluray;
+                    break;
+                case VideoType.Dvd:
+                    type = InputType.Dvd;
+                    inputPath = GetPlayableStreamFiles(inputPath[0], playableStreamFileNames).ToArray();
+                    break;
+                case VideoType.Iso:
+                    if (isoType.HasValue)
+                    {
+                        switch (isoType.Value)
+                        {
+                            case IsoType.BluRay:
+                                type = InputType.Bluray;
+                                break;
+                            case IsoType.Dvd:
+                                type = InputType.Dvd;
+                                inputPath = GetPlayableStreamFiles(inputPath[0], playableStreamFileNames).ToArray();
+                                break;
+                        }
+                    }
+                    break;
+                case VideoType.VideoFile:
+                    {
+                        if (isRemote)
+                        {
+                            type = InputType.Url;
+                        }
+                        break;
+                    }
+            }
+
+            return inputPath;
+        }
+
+        public static List<string> GetPlayableStreamFiles(string rootPath, IEnumerable<string> filenames)
+        {
+            var allFiles = Directory
+                .EnumerateFiles(rootPath, "*", SearchOption.AllDirectories)
+                .ToList();
+
+            return filenames.Select(name => allFiles.FirstOrDefault(f => string.Equals(Path.GetFileName(f), name, StringComparison.OrdinalIgnoreCase)))
+                .Where(f => !string.IsNullOrEmpty(f))
+                .ToList();
+        }
+
+        /// <summary>
+        /// Gets the type of the input.
+        /// </summary>
+        /// <param name="videoType">Type of the video.</param>
+        /// <param name="isoType">Type of the iso.</param>
+        /// <returns>InputType.</returns>
+        public static InputType GetInputType(VideoType? videoType, IsoType? isoType)
+        {
+            var type = InputType.File;
+
+            if (videoType.HasValue)
+            {
+                switch (videoType.Value)
+                {
+                    case VideoType.BluRay:
+                        type = InputType.Bluray;
+                        break;
+                    case VideoType.Dvd:
+                        type = InputType.Dvd;
+                        break;
+                    case VideoType.Iso:
+                        if (isoType.HasValue)
+                        {
+                            switch (isoType.Value)
+                            {
+                                case IsoType.BluRay:
+                                    type = InputType.Bluray;
+                                    break;
+                                case IsoType.Dvd:
+                                    type = InputType.Dvd;
+                                    break;
+                            }
+                        }
+                        break;
+                }
+            }
+
+            return type;
+        }
+
+        public static Model.Entities.MediaInfo GetMediaInfo(InternalMediaInfoResult data)
+        {
+            var internalStreams = data.streams ?? new MediaStreamInfo[] { };
+
+            var info = new Model.Entities.MediaInfo();
+
+            info.MediaStreams = internalStreams.Select(s => GetMediaStream(s, data.format))
+                .Where(i => i != null)
+                .ToList();
+
+            if (data.format != null)
+            {
+                info.Format = data.format.format_name;
+            }
+
+            return info;
+        }
+
+        private static readonly CultureInfo UsCulture = new CultureInfo("en-US");
+        
+        /// <summary>
+        /// Converts ffprobe stream info to our MediaStream class
+        /// </summary>
+        /// <param name="streamInfo">The stream info.</param>
+        /// <param name="formatInfo">The format info.</param>
+        /// <returns>MediaStream.</returns>
+        private static MediaStream GetMediaStream(MediaStreamInfo streamInfo, MediaFormatInfo formatInfo)
+        {
+            var stream = new MediaStream
+            {
+                Codec = streamInfo.codec_name,
+                Profile = streamInfo.profile,
+                Level = streamInfo.level,
+                Index = streamInfo.index
+            };
+
+            if (streamInfo.tags != null)
+            {
+                stream.Language = GetDictionaryValue(streamInfo.tags, "language");
+            }
+
+            if (string.Equals(streamInfo.codec_type, "audio", StringComparison.OrdinalIgnoreCase))
+            {
+                stream.Type = MediaStreamType.Audio;
+
+                stream.Channels = streamInfo.channels;
+
+                if (!string.IsNullOrEmpty(streamInfo.sample_rate))
+                {
+                    stream.SampleRate = int.Parse(streamInfo.sample_rate, UsCulture);
+                }
+
+                stream.ChannelLayout = ParseChannelLayout(streamInfo.channel_layout);
+            }
+            else if (string.Equals(streamInfo.codec_type, "subtitle", StringComparison.OrdinalIgnoreCase))
+            {
+                stream.Type = MediaStreamType.Subtitle;
+            }
+            else if (string.Equals(streamInfo.codec_type, "video", StringComparison.OrdinalIgnoreCase))
+            {
+                stream.Type = MediaStreamType.Video;
+
+                stream.Width = streamInfo.width;
+                stream.Height = streamInfo.height;
+                stream.AspectRatio = GetAspectRatio(streamInfo);
+
+                stream.AverageFrameRate = GetFrameRate(streamInfo.avg_frame_rate);
+                stream.RealFrameRate = GetFrameRate(streamInfo.r_frame_rate);
+            }
+            else
+            {
+                return null;
+            }
+
+            // Get stream bitrate
+            if (stream.Type != MediaStreamType.Subtitle)
+            {
+                var bitrate = 0;
+
+                if (!string.IsNullOrEmpty(streamInfo.bit_rate))
+                {
+                    bitrate = int.Parse(streamInfo.bit_rate, UsCulture);
+                }
+                else if (formatInfo != null && !string.IsNullOrEmpty(formatInfo.bit_rate))
+                {
+                    // If the stream info doesn't have a bitrate get the value from the media format info
+                    bitrate = int.Parse(formatInfo.bit_rate, UsCulture);
+                }
+
+                if (bitrate > 0)
+                {
+                    stream.BitRate = bitrate;
+                }
+            }
+
+            if (streamInfo.disposition != null)
+            {
+                var isDefault = GetDictionaryValue(streamInfo.disposition, "default");
+                var isForced = GetDictionaryValue(streamInfo.disposition, "forced");
+
+                stream.IsDefault = string.Equals(isDefault, "1", StringComparison.OrdinalIgnoreCase);
+
+                stream.IsForced = string.Equals(isForced, "1", StringComparison.OrdinalIgnoreCase);
+            }
+
+            return stream;
+        }
+
+        /// <summary>
+        /// Gets a string from an FFProbeResult tags dictionary
+        /// </summary>
+        /// <param name="tags">The tags.</param>
+        /// <param name="key">The key.</param>
+        /// <returns>System.String.</returns>
+        private static string GetDictionaryValue(Dictionary<string, string> tags, string key)
+        {
+            if (tags == null)
+            {
+                return null;
+            }
+
+            string val;
+
+            tags.TryGetValue(key, out val);
+            return val;
+        }
+
+        private static string ParseChannelLayout(string input)
+        {
+            if (string.IsNullOrEmpty(input))
+            {
+                return input;
+            }
+
+            return input.Split('(').FirstOrDefault();
+        }
+
+        private static string GetAspectRatio(MediaStreamInfo info)
+        {
+            var original = info.display_aspect_ratio;
+
+            int height;
+            int width;
+
+            var parts = (original ?? string.Empty).Split(':');
+            if (!(parts.Length == 2 &&
+                int.TryParse(parts[0], NumberStyles.Any, UsCulture, out width) &&
+                int.TryParse(parts[1], NumberStyles.Any, UsCulture, out height) &&
+                width > 0 &&
+                height > 0))
+            {
+                width = info.width;
+                height = info.height;
+            }
+
+            if (width > 0 && height > 0)
+            {
+                double ratio = width;
+                ratio /= height;
+
+                if (IsClose(ratio, 1.777777778, .03))
+                {
+                    return "16:9";
+                }
+
+                if (IsClose(ratio, 1.3333333333, .05))
+                {
+                    return "4:3";
+                }
+
+                if (IsClose(ratio, 1.41))
+                {
+                    return "1.41:1";
+                }
+
+                if (IsClose(ratio, 1.5))
+                {
+                    return "1.5:1";
+                }
+
+                if (IsClose(ratio, 1.6))
+                {
+                    return "1.6:1";
+                }
+
+                if (IsClose(ratio, 1.66666666667))
+                {
+                    return "5:3";
+                }
+
+                if (IsClose(ratio, 1.85, .02))
+                {
+                    return "1.85:1";
+                }
+
+                if (IsClose(ratio, 2.35, .025))
+                {
+                    return "2.35:1";
+                }
+
+                if (IsClose(ratio, 2.4, .025))
+                {
+                    return "2.40:1";
+                }
+            }
+
+            return original;
+        }
+
+        private static bool IsClose(double d1, double d2, double variance = .005)
+        {
+            return Math.Abs(d1 - d2) <= variance;
+        }
+
+        /// <summary>
+        /// Gets a frame rate from a string value in ffprobe output
+        /// This could be a number or in the format of 2997/125.
+        /// </summary>
+        /// <param name="value">The value.</param>
+        /// <returns>System.Nullable{System.Single}.</returns>
+        private static float? GetFrameRate(string value)
+        {
+            if (!string.IsNullOrEmpty(value))
+            {
+                var parts = value.Split('/');
+
+                float result;
+
+                if (parts.Length == 2)
+                {
+                    result = float.Parse(parts[0], UsCulture) / float.Parse(parts[1], UsCulture);
+                }
+                else
+                {
+                    result = float.Parse(parts[0], UsCulture);
+                }
+
+                return float.IsNaN(result) ? (float?)null : result;
+            }
+
+            return null;
+        }
+
+    }
+}