jellyfin/MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs
Cody Robibero 28223704f3
Merge pull request #7441 from 1337joe/add-external-stream-indicator
Add label for external audio/sub tracks
2022-03-11 07:48:23 -07:00

1634 lines
63 KiB
C#

#nullable disable
#pragma warning disable CS1591
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml;
using Jellyfin.Extensions;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Globalization;
using MediaBrowser.Model.MediaInfo;
using Microsoft.Extensions.Logging;
namespace MediaBrowser.MediaEncoding.Probing
{
public class ProbeResultNormalizer
{
// When extracting subtitles, the maximum length to consider (to avoid invalid filenames)
private const int MaxSubtitleDescriptionExtractionLength = 100;
private const string ArtistReplaceValue = " | ";
private readonly char[] _nameDelimiters = { '/', '|', ';', '\\' };
private static readonly Regex _performerPattern = new(@"(?<name>.*) \((?<instrument>.*)\)");
private readonly ILogger _logger;
private readonly ILocalizationManager _localization;
private string[] _splitWhiteList;
public ProbeResultNormalizer(ILogger logger, ILocalizationManager localization)
{
_logger = logger;
_localization = localization;
}
private IReadOnlyList<string> SplitWhitelist => _splitWhiteList ??= new string[]
{
"AC/DC",
"As/Hi Soundworks",
"Au/Ra",
"Bremer/McCoy",
"이달의 소녀 1/3",
"R!N / Gemie",
"LOONA 1/3",
"LOONA / yyxy",
"LOONA / ODD EYE CIRCLE",
"K/DA",
"22/7"
};
public MediaInfo GetMediaInfo(InternalMediaInfoResult data, VideoType? videoType, bool isAudio, string path, MediaProtocol protocol)
{
var info = new MediaInfo
{
Path = path,
Protocol = protocol,
VideoType = videoType
};
FFProbeHelpers.NormalizeFFProbeResult(data);
SetSize(data, info);
var internalStreams = data.Streams ?? Array.Empty<MediaStreamInfo>();
info.MediaStreams = internalStreams.Select(s => GetMediaStream(isAudio, s, data.Format))
.Where(i => i != null)
// Drop subtitle streams if we don't know the codec because it will just cause failures if we don't know how to handle them
.Where(i => i.Type != MediaStreamType.Subtitle || !string.IsNullOrWhiteSpace(i.Codec))
.ToList();
info.MediaAttachments = internalStreams.Select(GetMediaAttachment)
.Where(i => i != null)
.ToList();
if (data.Format != null)
{
info.Container = NormalizeFormat(data.Format.FormatName);
if (!string.IsNullOrEmpty(data.Format.BitRate))
{
if (int.TryParse(data.Format.BitRate, NumberStyles.Any, CultureInfo.InvariantCulture, out var value))
{
info.Bitrate = value;
}
}
}
var tags = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
var tagStreamType = isAudio ? "audio" : "video";
var tagStream = data.Streams?.FirstOrDefault(i => string.Equals(i.CodecType, tagStreamType, StringComparison.OrdinalIgnoreCase));
if (tagStream?.Tags != null)
{
foreach (var (key, value) in tagStream.Tags)
{
tags[key] = value;
}
}
if (data.Format?.Tags != null)
{
foreach (var (key, value) in data.Format.Tags)
{
tags[key] = value;
}
}
FetchGenres(info, tags);
info.Name = tags.GetFirstNotNullNorWhiteSpaceValue("title", "title-eng");
info.ForcedSortName = tags.GetFirstNotNullNorWhiteSpaceValue("sort_name", "title-sort", "titlesort");
info.Overview = tags.GetFirstNotNullNorWhiteSpaceValue("synopsis", "description", "desc");
info.IndexNumber = FFProbeHelpers.GetDictionaryNumericValue(tags, "episode_sort");
info.ParentIndexNumber = FFProbeHelpers.GetDictionaryNumericValue(tags, "season_number");
info.ShowName = tags.GetValueOrDefault("show_name");
info.ProductionYear = FFProbeHelpers.GetDictionaryNumericValue(tags, "date");
// Several different forms of retail/premiere date
info.PremiereDate =
FFProbeHelpers.GetDictionaryDateTime(tags, "originaldate") ??
FFProbeHelpers.GetDictionaryDateTime(tags, "retaildate") ??
FFProbeHelpers.GetDictionaryDateTime(tags, "retail date") ??
FFProbeHelpers.GetDictionaryDateTime(tags, "retail_date") ??
FFProbeHelpers.GetDictionaryDateTime(tags, "date_released") ??
FFProbeHelpers.GetDictionaryDateTime(tags, "date");
// Set common metadata for music (audio) and music videos (video)
info.Album = tags.GetValueOrDefault("album");
if (tags.TryGetValue("artists", out var artists) && !string.IsNullOrWhiteSpace(artists))
{
info.Artists = SplitDistinctArtists(artists, new[] { '/', ';' }, false).ToArray();
}
else
{
var artist = tags.GetFirstNotNullNorWhiteSpaceValue("artist");
info.Artists = artist == null
? Array.Empty<string>()
: SplitDistinctArtists(artist, _nameDelimiters, true).ToArray();
}
// Guess ProductionYear from PremiereDate if missing
if (!info.ProductionYear.HasValue && info.PremiereDate.HasValue)
{
info.ProductionYear = info.PremiereDate.Value.Year;
}
// Set mediaType-specific metadata
if (isAudio)
{
SetAudioRuntimeTicks(data, info);
// tags are normally located under data.format, but we've seen some cases with ogg where they're part of the info stream
// so let's create a combined list of both
SetAudioInfoFromTags(info, tags);
}
else
{
FetchStudios(info, tags, "copyright");
var iTunExtc = tags.GetFirstNotNullNorWhiteSpaceValue("iTunEXTC");
if (iTunExtc != null)
{
var parts = iTunExtc.Split('|', StringSplitOptions.RemoveEmptyEntries);
// Example
// mpaa|G|100|For crude humor
if (parts.Length > 1)
{
info.OfficialRating = parts[1];
if (parts.Length > 3)
{
info.OfficialRatingDescription = parts[3];
}
}
}
var iTunXml = tags.GetFirstNotNullNorWhiteSpaceValue("iTunMOVI");
if (iTunXml != null)
{
FetchFromItunesInfo(iTunXml, info);
}
if (data.Format != null && !string.IsNullOrEmpty(data.Format.Duration))
{
info.RunTimeTicks = TimeSpan.FromSeconds(double.Parse(data.Format.Duration, CultureInfo.InvariantCulture)).Ticks;
}
FetchWtvInfo(info, data);
if (data.Chapters != null)
{
info.Chapters = data.Chapters.Select(GetChapterInfo).ToArray();
}
ExtractTimestamp(info);
if (tags.TryGetValue("stereo_mode", out var stereoMode) && string.Equals(stereoMode, "left_right", StringComparison.OrdinalIgnoreCase))
{
info.Video3DFormat = Video3DFormat.FullSideBySide;
}
foreach (var mediaStream in info.MediaStreams)
{
if (mediaStream.Type == MediaStreamType.Audio && !mediaStream.BitRate.HasValue)
{
mediaStream.BitRate = GetEstimatedAudioBitrate(mediaStream.Codec, mediaStream.Channels);
}
}
var videoStreamsBitrate = info.MediaStreams.Where(i => i.Type == MediaStreamType.Video).Select(i => i.BitRate ?? 0).Sum();
// If ffprobe reported the container bitrate as being the same as the video stream bitrate, then it's wrong
if (videoStreamsBitrate == (info.Bitrate ?? 0))
{
info.InferTotalBitrate(true);
}
}
return info;
}
private string NormalizeFormat(string format)
{
if (string.IsNullOrWhiteSpace(format))
{
return null;
}
if (string.Equals(format, "mpegvideo", StringComparison.OrdinalIgnoreCase))
{
return "mpeg";
}
format = format.Replace("matroska", "mkv", StringComparison.OrdinalIgnoreCase);
return format;
}
private int? GetEstimatedAudioBitrate(string codec, int? channels)
{
if (!channels.HasValue)
{
return null;
}
var channelsValue = channels.Value;
if (string.Equals(codec, "aac", StringComparison.OrdinalIgnoreCase)
|| string.Equals(codec, "mp3", StringComparison.OrdinalIgnoreCase))
{
switch (channelsValue)
{
case <= 2:
return 192000;
case >= 5:
return 320000;
}
}
if (string.Equals(codec, "ac3", StringComparison.OrdinalIgnoreCase)
|| string.Equals(codec, "eac3", StringComparison.OrdinalIgnoreCase))
{
switch (channelsValue)
{
case <= 2:
return 192000;
case >= 5:
return 640000;
}
}
if (string.Equals(codec, "flac", StringComparison.OrdinalIgnoreCase)
|| string.Equals(codec, "alac", StringComparison.OrdinalIgnoreCase))
{
switch (channelsValue)
{
case <= 2:
return 960000;
case >= 5:
return 2880000;
}
}
return null;
}
private void FetchFromItunesInfo(string xml, MediaInfo info)
{
// Make things simpler and strip out the dtd
var plistIndex = xml.IndexOf("<plist", StringComparison.OrdinalIgnoreCase);
if (plistIndex != -1)
{
xml = xml.Substring(plistIndex);
}
xml = "<?xml version=\"1.0\"?>" + xml;
// <?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n<plist version=\"1.0\">\n<dict>\n\t<key>cast</key>\n\t<array>\n\t\t<dict>\n\t\t\t<key>name</key>\n\t\t\t<string>Blender Foundation</string>\n\t\t</dict>\n\t\t<dict>\n\t\t\t<key>name</key>\n\t\t\t<string>Janus Bager Kristensen</string>\n\t\t</dict>\n\t</array>\n\t<key>directors</key>\n\t<array>\n\t\t<dict>\n\t\t\t<key>name</key>\n\t\t\t<string>Sacha Goedegebure</string>\n\t\t</dict>\n\t</array>\n\t<key>studio</key>\n\t<string>Blender Foundation</string>\n</dict>\n</plist>\n
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(xml)))
using (var streamReader = new StreamReader(stream))
{
try
{
using (var reader = XmlReader.Create(streamReader))
{
reader.MoveToContent();
reader.Read();
// Loop through each element
while (!reader.EOF && reader.ReadState == ReadState.Interactive)
{
if (reader.NodeType == XmlNodeType.Element)
{
switch (reader.Name)
{
case "dict":
if (reader.IsEmptyElement)
{
reader.Read();
continue;
}
using (var subtree = reader.ReadSubtree())
{
ReadFromDictNode(subtree, info);
}
break;
default:
reader.Skip();
break;
}
}
else
{
reader.Read();
}
}
}
}
catch (XmlException)
{
// I've seen probe examples where the iTunMOVI value is just "<"
// So we should not allow this to fail the entire probing operation
}
}
}
private void ReadFromDictNode(XmlReader reader, MediaInfo info)
{
string currentKey = null;
var pairs = new List<NameValuePair>();
reader.MoveToContent();
reader.Read();
// Loop through each element
while (!reader.EOF && reader.ReadState == ReadState.Interactive)
{
if (reader.NodeType == XmlNodeType.Element)
{
switch (reader.Name)
{
case "key":
if (!string.IsNullOrWhiteSpace(currentKey))
{
ProcessPairs(currentKey, pairs, info);
}
currentKey = reader.ReadElementContentAsString();
pairs = new List<NameValuePair>();
break;
case "string":
var value = reader.ReadElementContentAsString();
if (!string.IsNullOrWhiteSpace(value))
{
pairs.Add(new NameValuePair
{
Name = value,
Value = value
});
}
break;
case "array":
if (reader.IsEmptyElement)
{
reader.Read();
continue;
}
using (var subtree = reader.ReadSubtree())
{
if (!string.IsNullOrWhiteSpace(currentKey))
{
pairs.AddRange(ReadValueArray(subtree));
}
}
break;
default:
reader.Skip();
break;
}
}
else
{
reader.Read();
}
}
}
private List<NameValuePair> ReadValueArray(XmlReader reader)
{
var pairs = new List<NameValuePair>();
reader.MoveToContent();
reader.Read();
// Loop through each element
while (!reader.EOF && reader.ReadState == ReadState.Interactive)
{
if (reader.NodeType == XmlNodeType.Element)
{
switch (reader.Name)
{
case "dict":
if (reader.IsEmptyElement)
{
reader.Read();
continue;
}
using (var subtree = reader.ReadSubtree())
{
var dict = GetNameValuePair(subtree);
if (dict != null)
{
pairs.Add(dict);
}
}
break;
default:
reader.Skip();
break;
}
}
else
{
reader.Read();
}
}
return pairs;
}
private void ProcessPairs(string key, List<NameValuePair> pairs, MediaInfo info)
{
IList<BaseItemPerson> peoples = new List<BaseItemPerson>();
if (string.Equals(key, "studio", StringComparison.OrdinalIgnoreCase))
{
info.Studios = pairs.Select(p => p.Value)
.Where(i => !string.IsNullOrWhiteSpace(i))
.Distinct(StringComparer.OrdinalIgnoreCase)
.ToArray();
}
else if (string.Equals(key, "screenwriters", StringComparison.OrdinalIgnoreCase))
{
foreach (var pair in pairs)
{
peoples.Add(new BaseItemPerson
{
Name = pair.Value,
Type = PersonType.Writer
});
}
}
else if (string.Equals(key, "producers", StringComparison.OrdinalIgnoreCase))
{
foreach (var pair in pairs)
{
peoples.Add(new BaseItemPerson
{
Name = pair.Value,
Type = PersonType.Producer
});
}
}
else if (string.Equals(key, "directors", StringComparison.OrdinalIgnoreCase))
{
foreach (var pair in pairs)
{
peoples.Add(new BaseItemPerson
{
Name = pair.Value,
Type = PersonType.Director
});
}
}
info.People = peoples.ToArray();
}
private NameValuePair GetNameValuePair(XmlReader reader)
{
string name = null;
string value = null;
reader.MoveToContent();
reader.Read();
// Loop through each element
while (!reader.EOF && reader.ReadState == ReadState.Interactive)
{
if (reader.NodeType == XmlNodeType.Element)
{
switch (reader.Name)
{
case "key":
name = reader.ReadElementContentAsString();
break;
case "string":
value = reader.ReadElementContentAsString();
break;
default:
reader.Skip();
break;
}
}
else
{
reader.Read();
}
}
if (string.IsNullOrWhiteSpace(name) ||
string.IsNullOrWhiteSpace(value))
{
return null;
}
return new NameValuePair
{
Name = name,
Value = value
};
}
private string NormalizeSubtitleCodec(string codec)
{
if (string.Equals(codec, "dvb_subtitle", StringComparison.OrdinalIgnoreCase))
{
codec = "dvbsub";
}
else if ((codec ?? string.Empty).IndexOf("PGS", StringComparison.OrdinalIgnoreCase) != -1)
{
codec = "PGSSUB";
}
else if ((codec ?? string.Empty).IndexOf("DVD", StringComparison.OrdinalIgnoreCase) != -1)
{
codec = "DVDSUB";
}
return codec;
}
/// <summary>
/// Converts ffprobe stream info to our MediaAttachment class.
/// </summary>
/// <param name="streamInfo">The stream info.</param>
/// <returns>MediaAttachments.</returns>
private MediaAttachment GetMediaAttachment(MediaStreamInfo streamInfo)
{
if (!string.Equals(streamInfo.CodecType, "attachment", StringComparison.OrdinalIgnoreCase)
&& streamInfo.Disposition?.GetValueOrDefault("attached_pic") != 1)
{
return null;
}
var attachment = new MediaAttachment
{
Codec = streamInfo.CodecName,
Index = streamInfo.Index
};
if (!string.IsNullOrWhiteSpace(streamInfo.CodecTagString))
{
attachment.CodecTag = streamInfo.CodecTagString;
}
if (streamInfo.Tags != null)
{
attachment.FileName = GetDictionaryValue(streamInfo.Tags, "filename");
attachment.MimeType = GetDictionaryValue(streamInfo.Tags, "mimetype");
attachment.Comment = GetDictionaryValue(streamInfo.Tags, "comment");
}
return attachment;
}
/// <summary>
/// Determines whether a stream code time base is double the frame rate.
/// </summary>
/// <param name="averageFrameRate">average frame rate.</param>
/// <param name="codecTimeBase">codec time base string.</param>
/// <returns>true if the codec time base is double the frame rate.</returns>
internal static bool IsCodecTimeBaseDoubleTheFrameRate(float? averageFrameRate, string codecTimeBase)
{
return MathF.Abs(((averageFrameRate ?? 0) * (GetFrameRate(codecTimeBase) ?? 0)) - 0.5f) <= float.Epsilon;
}
/// <summary>
/// Converts ffprobe stream info to our MediaStream class.
/// </summary>
/// <param name="isAudio">if set to <c>true</c> [is info].</param>
/// <param name="streamInfo">The stream info.</param>
/// <param name="formatInfo">The format info.</param>
/// <returns>MediaStream.</returns>
private MediaStream GetMediaStream(bool isAudio, MediaStreamInfo streamInfo, MediaFormatInfo formatInfo)
{
// These are mp4 chapters
if (string.Equals(streamInfo.CodecName, "mov_text", StringComparison.OrdinalIgnoreCase))
{
// Edit: but these are also sometimes subtitles?
// return null;
}
var stream = new MediaStream
{
Codec = streamInfo.CodecName,
Profile = streamInfo.Profile,
Level = streamInfo.Level,
Index = streamInfo.Index,
PixelFormat = streamInfo.PixelFormat,
NalLengthSize = streamInfo.NalLengthSize,
TimeBase = streamInfo.TimeBase,
CodecTimeBase = streamInfo.CodecTimeBase
};
if (string.Equals(streamInfo.IsAvc, "true", StringComparison.OrdinalIgnoreCase) ||
string.Equals(streamInfo.IsAvc, "1", StringComparison.OrdinalIgnoreCase))
{
stream.IsAVC = true;
}
else if (string.Equals(streamInfo.IsAvc, "false", StringComparison.OrdinalIgnoreCase) ||
string.Equals(streamInfo.IsAvc, "0", StringComparison.OrdinalIgnoreCase))
{
stream.IsAVC = false;
}
// Filter out junk
if (!string.IsNullOrWhiteSpace(streamInfo.CodecTagString) && !streamInfo.CodecTagString.Contains("[0]", StringComparison.OrdinalIgnoreCase))
{
stream.CodecTag = streamInfo.CodecTagString;
}
if (streamInfo.Tags != null)
{
stream.Language = GetDictionaryValue(streamInfo.Tags, "language");
stream.Comment = GetDictionaryValue(streamInfo.Tags, "comment");
stream.Title = GetDictionaryValue(streamInfo.Tags, "title");
}
if (string.Equals(streamInfo.CodecType, "audio", StringComparison.OrdinalIgnoreCase))
{
stream.Type = MediaStreamType.Audio;
stream.Channels = streamInfo.Channels;
if (!string.IsNullOrEmpty(streamInfo.SampleRate))
{
if (int.TryParse(streamInfo.SampleRate, NumberStyles.Any, CultureInfo.InvariantCulture, out var value))
{
stream.SampleRate = value;
}
}
stream.ChannelLayout = ParseChannelLayout(streamInfo.ChannelLayout);
if (streamInfo.BitsPerSample > 0)
{
stream.BitDepth = streamInfo.BitsPerSample;
}
else if (streamInfo.BitsPerRawSample > 0)
{
stream.BitDepth = streamInfo.BitsPerRawSample;
}
if (string.IsNullOrEmpty(stream.Title))
{
// mp4 missing track title workaround: fall back to handler_name if populated and not the default "SoundHandler"
string handlerName = GetDictionaryValue(streamInfo.Tags, "handler_name");
if (!string.IsNullOrEmpty(handlerName) && !string.Equals(handlerName, "SoundHandler", StringComparison.OrdinalIgnoreCase))
{
stream.Title = handlerName;
}
}
}
else if (string.Equals(streamInfo.CodecType, "subtitle", StringComparison.OrdinalIgnoreCase))
{
stream.Type = MediaStreamType.Subtitle;
stream.Codec = NormalizeSubtitleCodec(stream.Codec);
stream.LocalizedUndefined = _localization.GetLocalizedString("Undefined");
stream.LocalizedDefault = _localization.GetLocalizedString("Default");
stream.LocalizedForced = _localization.GetLocalizedString("Forced");
stream.LocalizedExternal = _localization.GetLocalizedString("External");
if (string.IsNullOrEmpty(stream.Title))
{
// mp4 missing track title workaround: fall back to handler_name if populated and not the default "SubtitleHandler"
string handlerName = GetDictionaryValue(streamInfo.Tags, "handler_name");
if (!string.IsNullOrEmpty(handlerName) && !string.Equals(handlerName, "SubtitleHandler", StringComparison.OrdinalIgnoreCase))
{
stream.Title = handlerName;
}
}
}
else if (string.Equals(streamInfo.CodecType, "video", StringComparison.OrdinalIgnoreCase))
{
stream.AverageFrameRate = GetFrameRate(streamInfo.AverageFrameRate);
stream.RealFrameRate = GetFrameRate(streamInfo.RFrameRate);
bool videoInterlaced = !string.IsNullOrWhiteSpace(streamInfo.FieldOrder)
&& !string.Equals(streamInfo.FieldOrder, "progressive", StringComparison.OrdinalIgnoreCase);
// Some interlaced H.264 files in mp4 containers using MBAFF coding aren't flagged as being interlaced by FFprobe,
// so for H.264 files we also calculate the frame rate from the codec time base and check if it is double the reported
// frame rate to determine if the file is interlaced
bool h264MbaffCoded = string.Equals(stream.Codec, "h264", StringComparison.OrdinalIgnoreCase)
&& string.IsNullOrWhiteSpace(streamInfo.FieldOrder)
&& IsCodecTimeBaseDoubleTheFrameRate(stream.AverageFrameRate, stream.CodecTimeBase);
if (videoInterlaced || h264MbaffCoded)
{
stream.IsInterlaced = true;
}
if (isAudio
|| string.Equals(stream.Codec, "mjpeg", StringComparison.OrdinalIgnoreCase)
|| string.Equals(stream.Codec, "gif", StringComparison.OrdinalIgnoreCase)
|| string.Equals(stream.Codec, "png", StringComparison.OrdinalIgnoreCase))
{
stream.Type = MediaStreamType.EmbeddedImage;
}
else if (string.Equals(stream.Codec, "mjpeg", StringComparison.OrdinalIgnoreCase))
{
// How to differentiate between video and embedded image?
// The only difference I've seen thus far is presence of codec tag, also embedded images have high (unusual) framerates
if (!string.IsNullOrWhiteSpace(stream.CodecTag))
{
stream.Type = MediaStreamType.Video;
}
else
{
stream.Type = MediaStreamType.EmbeddedImage;
}
}
else
{
stream.Type = MediaStreamType.Video;
}
stream.Width = streamInfo.Width;
stream.Height = streamInfo.Height;
stream.AspectRatio = GetAspectRatio(streamInfo);
if (streamInfo.BitsPerSample > 0)
{
stream.BitDepth = streamInfo.BitsPerSample;
}
else if (streamInfo.BitsPerRawSample > 0)
{
stream.BitDepth = streamInfo.BitsPerRawSample;
}
if (!stream.BitDepth.HasValue)
{
if (!string.IsNullOrEmpty(streamInfo.PixelFormat))
{
if (string.Equals(streamInfo.PixelFormat, "yuv420p", StringComparison.OrdinalIgnoreCase)
|| string.Equals(streamInfo.PixelFormat, "yuv444p", StringComparison.OrdinalIgnoreCase))
{
stream.BitDepth = 8;
}
else if (string.Equals(streamInfo.PixelFormat, "yuv420p10le", StringComparison.OrdinalIgnoreCase)
|| string.Equals(streamInfo.PixelFormat, "yuv444p10le", StringComparison.OrdinalIgnoreCase))
{
stream.BitDepth = 10;
}
else if (string.Equals(streamInfo.PixelFormat, "yuv420p12le", StringComparison.OrdinalIgnoreCase)
|| string.Equals(streamInfo.PixelFormat, "yuv444p12le", StringComparison.OrdinalIgnoreCase))
{
stream.BitDepth = 12;
}
}
}
// stream.IsAnamorphic = string.Equals(streamInfo.sample_aspect_ratio, "0:1", StringComparison.OrdinalIgnoreCase) ||
// string.Equals(stream.AspectRatio, "2.35:1", StringComparison.OrdinalIgnoreCase) ||
// string.Equals(stream.AspectRatio, "2.40:1", StringComparison.OrdinalIgnoreCase);
// http://stackoverflow.com/questions/17353387/how-to-detect-anamorphic-video-with-ffprobe
stream.IsAnamorphic = string.Equals(streamInfo.SampleAspectRatio, "0:1", StringComparison.OrdinalIgnoreCase);
if (streamInfo.Refs > 0)
{
stream.RefFrames = streamInfo.Refs;
}
if (!string.IsNullOrEmpty(streamInfo.ColorRange))
{
stream.ColorRange = streamInfo.ColorRange;
}
if (!string.IsNullOrEmpty(streamInfo.ColorSpace))
{
stream.ColorSpace = streamInfo.ColorSpace;
}
if (!string.IsNullOrEmpty(streamInfo.ColorTransfer))
{
stream.ColorTransfer = streamInfo.ColorTransfer;
}
if (!string.IsNullOrEmpty(streamInfo.ColorPrimaries))
{
stream.ColorPrimaries = streamInfo.ColorPrimaries;
}
}
else
{
return null;
}
// Get stream bitrate
var bitrate = 0;
if (!string.IsNullOrEmpty(streamInfo.BitRate))
{
if (int.TryParse(streamInfo.BitRate, NumberStyles.Any, CultureInfo.InvariantCulture, out var value))
{
bitrate = value;
}
}
// The bitrate info of FLAC musics and some videos is included in formatInfo.
if (bitrate == 0
&& formatInfo != null
&& !string.IsNullOrEmpty(formatInfo.BitRate)
&& (stream.Type == MediaStreamType.Video || (isAudio && stream.Type == MediaStreamType.Audio)))
{
// If the stream info doesn't have a bitrate get the value from the media format info
if (int.TryParse(formatInfo.BitRate, NumberStyles.Any, CultureInfo.InvariantCulture, out var value))
{
bitrate = value;
}
}
if (bitrate > 0)
{
stream.BitRate = bitrate;
}
// Extract bitrate info from tag "BPS" if possible.
if (!stream.BitRate.HasValue
&& (string.Equals(streamInfo.CodecType, "audio", StringComparison.OrdinalIgnoreCase)
|| string.Equals(streamInfo.CodecType, "video", StringComparison.OrdinalIgnoreCase)))
{
var bps = GetBPSFromTags(streamInfo);
if (bps > 0)
{
stream.BitRate = bps;
}
}
// Get average bitrate info from tag "NUMBER_OF_BYTES" and "DURATION" if possible.
if (!stream.BitRate.HasValue
&& (string.Equals(streamInfo.CodecType, "audio", StringComparison.OrdinalIgnoreCase)
|| string.Equals(streamInfo.CodecType, "video", StringComparison.OrdinalIgnoreCase)))
{
var durationInSeconds = GetRuntimeSecondsFromTags(streamInfo);
var bytes = GetNumberOfBytesFromTags(streamInfo);
if (durationInSeconds != null && bytes != null)
{
var bps = Convert.ToInt32(bytes * 8 / durationInSeconds, CultureInfo.InvariantCulture);
if (bps > 0)
{
stream.BitRate = bps;
}
}
}
var disposition = streamInfo.Disposition;
if (disposition != null)
{
if (disposition.GetValueOrDefault("default") == 1)
{
stream.IsDefault = true;
}
if (disposition.GetValueOrDefault("forced") == 1)
{
stream.IsForced = true;
}
}
NormalizeStreamTitle(stream);
return stream;
}
private void NormalizeStreamTitle(MediaStream stream)
{
if (string.Equals(stream.Title, "cc", StringComparison.OrdinalIgnoreCase))
{
stream.Title = null;
}
if (stream.Type == MediaStreamType.EmbeddedImage)
{
stream.Title = null;
}
}
/// <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 string GetDictionaryValue(IReadOnlyDictionary<string, string> tags, string key)
{
if (tags == null)
{
return null;
}
tags.TryGetValue(key, out var val);
return val;
}
private string ParseChannelLayout(string input)
{
if (string.IsNullOrEmpty(input))
{
return null;
}
return input.Split('(').FirstOrDefault();
}
private string GetAspectRatio(MediaStreamInfo info)
{
var original = info.DisplayAspectRatio;
var parts = (original ?? string.Empty).Split(':');
if (!(parts.Length == 2 &&
int.TryParse(parts[0], NumberStyles.Any, CultureInfo.InvariantCulture, out var width) &&
int.TryParse(parts[1], NumberStyles.Any, CultureInfo.InvariantCulture, out var 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 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>
internal static float? GetFrameRate(ReadOnlySpan<char> value)
{
if (value.IsEmpty)
{
return null;
}
int index = value.IndexOf('/');
if (index == -1)
{
// REVIEW: is this branch actually required? (i.e. does ffprobe ever output something other than a fraction?)
if (float.TryParse(value, NumberStyles.AllowThousands | NumberStyles.Float, CultureInfo.InvariantCulture, out var result))
{
return result;
}
return null;
}
if (!float.TryParse(value[..index], NumberStyles.Integer, CultureInfo.InvariantCulture, out var dividend)
|| !float.TryParse(value[(index + 1)..], NumberStyles.Integer, CultureInfo.InvariantCulture, out var divisor))
{
return null;
}
return divisor == 0f ? null : dividend / divisor;
}
private void SetAudioRuntimeTicks(InternalMediaInfoResult result, MediaInfo data)
{
// Get the first info stream
var stream = result.Streams?.FirstOrDefault(s => string.Equals(s.CodecType, "audio", StringComparison.OrdinalIgnoreCase));
if (stream == null)
{
return;
}
// Get duration from stream properties
var duration = stream.Duration;
// If it's not there go into format properties
if (string.IsNullOrEmpty(duration))
{
duration = result.Format.Duration;
}
// If we got something, parse it
if (!string.IsNullOrEmpty(duration))
{
data.RunTimeTicks = TimeSpan.FromSeconds(double.Parse(duration, CultureInfo.InvariantCulture)).Ticks;
}
}
private int? GetBPSFromTags(MediaStreamInfo streamInfo)
{
if (streamInfo?.Tags == null)
{
return null;
}
var bps = GetDictionaryValue(streamInfo.Tags, "BPS-eng") ?? GetDictionaryValue(streamInfo.Tags, "BPS");
if (!string.IsNullOrEmpty(bps)
&& int.TryParse(bps, NumberStyles.Integer, CultureInfo.InvariantCulture, out var parsedBps))
{
return parsedBps;
}
return null;
}
private double? GetRuntimeSecondsFromTags(MediaStreamInfo streamInfo)
{
if (streamInfo?.Tags == null)
{
return null;
}
var duration = GetDictionaryValue(streamInfo.Tags, "DURATION-eng") ?? GetDictionaryValue(streamInfo.Tags, "DURATION");
if (!string.IsNullOrEmpty(duration) && TimeSpan.TryParse(duration, out var parsedDuration))
{
return parsedDuration.TotalSeconds;
}
return null;
}
private long? GetNumberOfBytesFromTags(MediaStreamInfo streamInfo)
{
if (streamInfo?.Tags == null)
{
return null;
}
var numberOfBytes = GetDictionaryValue(streamInfo.Tags, "NUMBER_OF_BYTES-eng")
?? GetDictionaryValue(streamInfo.Tags, "NUMBER_OF_BYTES");
if (!string.IsNullOrEmpty(numberOfBytes)
&& long.TryParse(numberOfBytes, NumberStyles.Integer, CultureInfo.InvariantCulture, out var parsedBytes))
{
return parsedBytes;
}
return null;
}
private void SetSize(InternalMediaInfoResult data, MediaInfo info)
{
if (data.Format == null)
{
return;
}
info.Size = string.IsNullOrEmpty(data.Format.Size) ? null : long.Parse(data.Format.Size, CultureInfo.InvariantCulture);
}
private void SetAudioInfoFromTags(MediaInfo audio, IReadOnlyDictionary<string, string> tags)
{
var people = new List<BaseItemPerson>();
if (tags.TryGetValue("composer", out var composer) && !string.IsNullOrWhiteSpace(composer))
{
foreach (var person in Split(composer, false))
{
people.Add(new BaseItemPerson { Name = person, Type = PersonType.Composer });
}
}
if (tags.TryGetValue("conductor", out var conductor) && !string.IsNullOrWhiteSpace(conductor))
{
foreach (var person in Split(conductor, false))
{
people.Add(new BaseItemPerson { Name = person, Type = PersonType.Conductor });
}
}
if (tags.TryGetValue("lyricist", out var lyricist) && !string.IsNullOrWhiteSpace(lyricist))
{
foreach (var person in Split(lyricist, false))
{
people.Add(new BaseItemPerson { Name = person, Type = PersonType.Lyricist });
}
}
if (tags.TryGetValue("performer", out var performer) && !string.IsNullOrWhiteSpace(performer))
{
foreach (var person in Split(performer, false))
{
Match match = _performerPattern.Match(person);
// If the performer doesn't have any instrument/role associated, it won't match. In that case, chances are it's simply a band name, so we skip it.
if (match.Success)
{
people.Add(new BaseItemPerson
{
Name = match.Groups["name"].Value,
Type = PersonType.Actor,
Role = CultureInfo.InvariantCulture.TextInfo.ToTitleCase(match.Groups["instrument"].Value)
});
}
}
}
// In cases where there isn't sufficient information as to which role a writer performed on a recording, tagging software uses the "writer" tag.
if (tags.TryGetValue("writer", out var writer) && !string.IsNullOrWhiteSpace(writer))
{
foreach (var person in Split(writer, false))
{
people.Add(new BaseItemPerson { Name = person, Type = PersonType.Writer });
}
}
if (tags.TryGetValue("arranger", out var arranger) && !string.IsNullOrWhiteSpace(arranger))
{
foreach (var person in Split(arranger, false))
{
people.Add(new BaseItemPerson { Name = person, Type = PersonType.Arranger });
}
}
if (tags.TryGetValue("engineer", out var engineer) && !string.IsNullOrWhiteSpace(engineer))
{
foreach (var person in Split(engineer, false))
{
people.Add(new BaseItemPerson { Name = person, Type = PersonType.Engineer });
}
}
if (tags.TryGetValue("mixer", out var mixer) && !string.IsNullOrWhiteSpace(mixer))
{
foreach (var person in Split(mixer, false))
{
people.Add(new BaseItemPerson { Name = person, Type = PersonType.Mixer });
}
}
if (tags.TryGetValue("remixer", out var remixer) && !string.IsNullOrWhiteSpace(remixer))
{
foreach (var person in Split(remixer, false))
{
people.Add(new BaseItemPerson { Name = person, Type = PersonType.Remixer });
}
}
audio.People = people.ToArray();
// Set album artist
var albumArtist = tags.GetFirstNotNullNorWhiteSpaceValue("albumartist", "album artist", "album_artist");
audio.AlbumArtists = albumArtist != null
? SplitDistinctArtists(albumArtist, _nameDelimiters, true).ToArray()
: Array.Empty<string>();
// Set album artist to artist if empty
if (audio.AlbumArtists.Length == 0)
{
audio.AlbumArtists = audio.Artists;
}
// Track number
audio.IndexNumber = GetDictionaryTrackOrDiscNumber(tags, "track");
// Disc number
audio.ParentIndexNumber = GetDictionaryTrackOrDiscNumber(tags, "disc");
// There's several values in tags may or may not be present
FetchStudios(audio, tags, "organization");
FetchStudios(audio, tags, "ensemble");
FetchStudios(audio, tags, "publisher");
FetchStudios(audio, tags, "label");
// These support multiple values, but for now we only store the first.
var mb = GetMultipleMusicBrainzId(tags.GetValueOrDefault("MusicBrainz Album Artist Id"))
?? GetMultipleMusicBrainzId(tags.GetValueOrDefault("MUSICBRAINZ_ALBUMARTISTID"));
audio.SetProviderId(MetadataProvider.MusicBrainzAlbumArtist, mb);
mb = GetMultipleMusicBrainzId(tags.GetValueOrDefault("MusicBrainz Artist Id"))
?? GetMultipleMusicBrainzId(tags.GetValueOrDefault("MUSICBRAINZ_ARTISTID"));
audio.SetProviderId(MetadataProvider.MusicBrainzArtist, mb);
mb = GetMultipleMusicBrainzId(tags.GetValueOrDefault("MusicBrainz Album Id"))
?? GetMultipleMusicBrainzId(tags.GetValueOrDefault("MUSICBRAINZ_ALBUMID"));
audio.SetProviderId(MetadataProvider.MusicBrainzAlbum, mb);
mb = GetMultipleMusicBrainzId(tags.GetValueOrDefault("MusicBrainz Release Group Id"))
?? GetMultipleMusicBrainzId(tags.GetValueOrDefault("MUSICBRAINZ_RELEASEGROUPID"));
audio.SetProviderId(MetadataProvider.MusicBrainzReleaseGroup, mb);
mb = GetMultipleMusicBrainzId(tags.GetValueOrDefault("MusicBrainz Release Track Id"))
?? GetMultipleMusicBrainzId(tags.GetValueOrDefault("MUSICBRAINZ_RELEASETRACKID"));
audio.SetProviderId(MetadataProvider.MusicBrainzTrack, mb);
}
private string GetMultipleMusicBrainzId(string value)
{
if (string.IsNullOrWhiteSpace(value))
{
return null;
}
return value.Split('/', StringSplitOptions.RemoveEmptyEntries)
.Select(i => i.Trim())
.FirstOrDefault(i => !string.IsNullOrWhiteSpace(i));
}
/// <summary>
/// Splits the specified val.
/// </summary>
/// <param name="val">The val.</param>
/// <param name="allowCommaDelimiter">if set to <c>true</c> [allow comma delimiter].</param>
/// <returns>System.String[][].</returns>
private IEnumerable<string> Split(string val, bool allowCommaDelimiter)
{
// Only use the comma as a delimiter if there are no slashes or pipes.
// We want to be careful not to split names that have commas in them
var delimiter = !allowCommaDelimiter || _nameDelimiters.Any(i => val.IndexOf(i, StringComparison.Ordinal) != -1) ?
_nameDelimiters :
new[] { ',' };
return val.Split(delimiter, StringSplitOptions.RemoveEmptyEntries)
.Where(i => !string.IsNullOrWhiteSpace(i))
.Select(i => i.Trim());
}
private IEnumerable<string> SplitDistinctArtists(string val, char[] delimiters, bool splitFeaturing)
{
if (splitFeaturing)
{
val = val.Replace(" featuring ", ArtistReplaceValue, StringComparison.OrdinalIgnoreCase)
.Replace(" feat. ", ArtistReplaceValue, StringComparison.OrdinalIgnoreCase);
}
var artistsFound = new List<string>();
foreach (var whitelistArtist in SplitWhitelist)
{
var originalVal = val;
val = val.Replace(whitelistArtist, "|", StringComparison.OrdinalIgnoreCase);
if (!string.Equals(originalVal, val, StringComparison.OrdinalIgnoreCase))
{
artistsFound.Add(whitelistArtist);
}
}
var artists = val.Split(delimiters, StringSplitOptions.RemoveEmptyEntries)
.Where(i => !string.IsNullOrWhiteSpace(i))
.Select(i => i.Trim());
artistsFound.AddRange(artists);
return artistsFound.DistinctNames();
}
/// <summary>
/// Gets the studios from the tags collection.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="tags">The tags.</param>
/// <param name="tagName">Name of the tag.</param>
private void FetchStudios(MediaInfo info, IReadOnlyDictionary<string, string> tags, string tagName)
{
var val = tags.GetValueOrDefault(tagName);
if (string.IsNullOrEmpty(val))
{
return;
}
var studios = Split(val, true);
var studioList = new List<string>();
foreach (var studio in studios)
{
if (string.IsNullOrWhiteSpace(studio))
{
continue;
}
// Don't add artist/album artist name to studios, even if it's listed there
if (info.Artists.Contains(studio, StringComparison.OrdinalIgnoreCase)
|| info.AlbumArtists.Contains(studio, StringComparison.OrdinalIgnoreCase))
{
continue;
}
studioList.Add(studio);
}
info.Studios = studioList
.Distinct(StringComparer.OrdinalIgnoreCase)
.ToArray();
}
/// <summary>
/// Gets the genres from the tags collection.
/// </summary>
/// <param name="info">The information.</param>
/// <param name="tags">The tags.</param>
private void FetchGenres(MediaInfo info, IReadOnlyDictionary<string, string> tags)
{
var genreVal = tags.GetValueOrDefault("genre");
if (string.IsNullOrEmpty(genreVal))
{
return;
}
var genres = new List<string>(info.Genres);
foreach (var genre in Split(genreVal, true))
{
if (string.IsNullOrWhiteSpace(genre))
{
continue;
}
genres.Add(genre);
}
info.Genres = genres
.Distinct(StringComparer.OrdinalIgnoreCase)
.ToArray();
}
/// <summary>
/// Gets the track or disc number, which can be in the form of '1', or '1/3'.
/// </summary>
/// <param name="tags">The tags.</param>
/// <param name="tagName">Name of the tag.</param>
/// <returns>The track or disc number, or null, if missing or not parseable.</returns>
private static int? GetDictionaryTrackOrDiscNumber(IReadOnlyDictionary<string, string> tags, string tagName)
{
var disc = tags.GetValueOrDefault(tagName);
if (!string.IsNullOrEmpty(disc) && int.TryParse(disc.AsSpan().LeftPart('/'), out var discNum))
{
return discNum;
}
return null;
}
private static ChapterInfo GetChapterInfo(MediaChapter chapter)
{
var info = new ChapterInfo();
if (chapter.Tags != null && chapter.Tags.TryGetValue("title", out string name))
{
info.Name = name;
}
// Limit accuracy to milliseconds to match xml saving
var secondsString = chapter.StartTime;
if (double.TryParse(secondsString, NumberStyles.Any, CultureInfo.InvariantCulture, out var seconds))
{
var ms = Math.Round(TimeSpan.FromSeconds(seconds).TotalMilliseconds);
info.StartPositionTicks = TimeSpan.FromMilliseconds(ms).Ticks;
}
return info;
}
private void FetchWtvInfo(MediaInfo video, InternalMediaInfoResult data)
{
var tags = data.Format?.Tags;
if (tags == null)
{
return;
}
if (tags.TryGetValue("WM/Genre", out var genres) && !string.IsNullOrWhiteSpace(genres))
{
var genreList = genres.Split(new[] { ';', '/', ',' }, StringSplitOptions.RemoveEmptyEntries)
.Where(i => !string.IsNullOrWhiteSpace(i))
.Select(i => i.Trim())
.ToList();
// If this is empty then don't overwrite genres that might have been fetched earlier
if (genreList.Count > 0)
{
video.Genres = genreList.ToArray();
}
}
if (tags.TryGetValue("WM/ParentalRating", out var officialRating) && !string.IsNullOrWhiteSpace(officialRating))
{
video.OfficialRating = officialRating;
}
if (tags.TryGetValue("WM/MediaCredits", out var people) && !string.IsNullOrEmpty(people))
{
video.People = people.Split(new[] { ';', '/' }, StringSplitOptions.RemoveEmptyEntries)
.Where(i => !string.IsNullOrWhiteSpace(i))
.Select(i => new BaseItemPerson { Name = i.Trim(), Type = PersonType.Actor })
.ToArray();
}
if (tags.TryGetValue("WM/OriginalReleaseTime", out var year) && int.TryParse(year, NumberStyles.Integer, CultureInfo.InvariantCulture, out var parsedYear))
{
video.ProductionYear = parsedYear;
}
// Credit to MCEBuddy: https://mcebuddy2x.codeplex.com/
// DateTime is reported along with timezone info (typically Z i.e. UTC hence assume None)
if (tags.TryGetValue("WM/MediaOriginalBroadcastDateTime", out var premiereDateString) && DateTime.TryParse(year, null, DateTimeStyles.AdjustToUniversal, out var parsedDate))
{
video.PremiereDate = parsedDate;
}
var description = tags.GetValueOrDefault("WM/SubTitleDescription");
var subTitle = tags.GetValueOrDefault("WM/SubTitle");
// For below code, credit to MCEBuddy: https://mcebuddy2x.codeplex.com/
// Sometimes for TV Shows the Subtitle field is empty and the subtitle description contains the subtitle, extract if possible. See ticket https://mcebuddy2x.codeplex.com/workitem/1910
// The format is -> EPISODE/TOTAL_EPISODES_IN_SEASON. SUBTITLE: DESCRIPTION
// OR -> COMMENT. SUBTITLE: DESCRIPTION
// e.g. -> 4/13. The Doctor's Wife: Science fiction drama. When he follows a Time Lord distress signal, the Doctor puts Amy, Rory and his beloved TARDIS in grave danger. Also in HD. [AD,S]
// e.g. -> CBeebies Bedtime Hour. The Mystery: Animated adventures of two friends who live on an island in the middle of the big city. Some of Abney and Teal's favourite objects are missing. [S]
if (string.IsNullOrWhiteSpace(subTitle)
&& !string.IsNullOrWhiteSpace(description)
&& description.AsSpan()[..Math.Min(description.Length, MaxSubtitleDescriptionExtractionLength)].Contains(':')) // Check within the Subtitle size limit, otherwise from description it can get too long creating an invalid filename
{
string[] descriptionParts = description.Split(':');
if (descriptionParts.Length > 0)
{
string subtitle = descriptionParts[0];
try
{
// Check if it contains a episode number and season number
if (subtitle.Contains('/', StringComparison.Ordinal))
{
string[] subtitleParts = subtitle.Split(' ');
string[] numbers = subtitleParts[0].Replace(".", string.Empty, StringComparison.Ordinal).Split('/');
video.IndexNumber = int.Parse(numbers[0], CultureInfo.InvariantCulture);
// int totalEpisodesInSeason = int.Parse(numbers[1], CultureInfo.InvariantCulture);
// Skip the numbers, concatenate the rest, trim and set as new description
description = string.Join(' ', subtitleParts, 1, subtitleParts.Length - 1).Trim();
}
else if (subtitle.Contains('.', StringComparison.Ordinal))
{
var subtitleParts = subtitle.Split('.');
description = string.Join('.', subtitleParts, 1, subtitleParts.Length - 1).Trim();
}
else
{
description = subtitle.Trim();
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Error while parsing subtitle field");
// Fallback to default parsing
if (subtitle.Contains('.', StringComparison.Ordinal))
{
var subtitleParts = subtitle.Split('.');
description = string.Join('.', subtitleParts, 1, subtitleParts.Length - 1).Trim();
}
else
{
description = subtitle.Trim();
}
}
}
}
if (!string.IsNullOrWhiteSpace(description))
{
video.Overview = description;
}
}
private void ExtractTimestamp(MediaInfo video)
{
if (video.VideoType != VideoType.VideoFile)
{
return;
}
if (!string.Equals(video.Container, "mpeg2ts", StringComparison.OrdinalIgnoreCase)
&& !string.Equals(video.Container, "m2ts", StringComparison.OrdinalIgnoreCase)
&& !string.Equals(video.Container, "ts", StringComparison.OrdinalIgnoreCase))
{
return;
}
try
{
video.Timestamp = GetMpegTimestamp(video.Path);
_logger.LogDebug("Video has {Timestamp} timestamp", video.Timestamp);
}
catch (Exception ex)
{
video.Timestamp = null;
_logger.LogError(ex, "Error extracting timestamp info from {Path}", video.Path);
}
}
// REVIEW: find out why the byte array needs to be 197 bytes long and comment the reason
private TransportStreamTimestamp GetMpegTimestamp(string path)
{
var packetBuffer = new byte[197];
using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read, 1))
{
fs.Read(packetBuffer);
}
if (packetBuffer[0] == 71)
{
return TransportStreamTimestamp.None;
}
if ((packetBuffer[4] != 71) || (packetBuffer[196] != 71))
{
return TransportStreamTimestamp.None;
}
if ((packetBuffer[0] == 0) && (packetBuffer[1] == 0) && (packetBuffer[2] == 0) && (packetBuffer[3] == 0))
{
return TransportStreamTimestamp.Zero;
}
return TransportStreamTimestamp.Valid;
}
}
}