public static decimal DEFAULT_ASPECT_RATIO = (decimal)16 / 9; // most new material is 16:9 these days
public static WebMediaInfo LoadMediaInfoOrSurrogate(MediaSource source)
{
WebMediaInfo info;
try
{
info = MediaInfoWrapper.GetMediaInfo(source);
if (info != null)
{
return(info);
}
}
catch (Exception ex)
{
Log.Warn(String.Format("Failed to load MediaInfo for {0}", source.GetDebugName()), ex);
}
WebMediaInfo surr = new WebMediaInfo();
surr.Duration = 0;
surr.SubtitleStreams = new List <WebSubtitleStream>();
surr.AudioStreams = new List <WebAudioStream>()
{
new WebAudioStream()
{
Channels = 2,
Codec = "Unknown",
ID = 1,
Index = 0,
Language = "und", // yes, that's valid ISO 639 (I think)
LanguageFull = "Unknown",
}
};
surr.VideoStreams = new List <WebVideoStream>()
{
new WebVideoStream()
{
Codec = "Unknown",
DisplayAspectRatio = DEFAULT_ASPECT_RATIO,
DisplayAspectRatioString = "16:9",
ID = 2,
Index = 0,
Height = 720,
Width = 1280
}
};
return(surr);
}
public static WebMediaInfo LoadMediaInfoOrSurrogate(MediaSource source)
{
WebMediaInfo info = MediaInfoWrapper.GetMediaInfo(source);
if (info != null)
{
return(info);
}
WebMediaInfo surr = new WebMediaInfo();
surr.Duration = 0;
surr.SubtitleStreams = new List <WebSubtitleStream>();
surr.AudioStreams = new List <WebAudioStream>()
{
new WebAudioStream()
{
Channels = 2,
Codec = "Unknown",
ID = 1,
Index = 0,
Language = "und", // yes, that's valid ISO 639 (I think)
LanguageFull = "Unknown",
}
};
surr.VideoStreams = new List <WebVideoStream>()
{
new WebVideoStream()
{
Codec = "Unknown",
DisplayAspectRatio = 16 / 9, // this class is primarily used for TV data and that's mostly 16:9 these days afaik
DisplayAspectRatioString = "16:9",
ID = 2,
Index = 0,
Height = 1280, // gives this any problems?
Width = 720
}
};
return(surr);
}
public Resolution CalculateSize(TranscoderProfile profile, MediaSource source, WebMediaInfo info = null)
{
if (!profile.HasVideoStream)
{
return(new Resolution(0, 0));
}
decimal aspect = (decimal)16 / 9; // the default aspect ratio
if (source.MediaType != WebStreamMediaType.TV && profile != null)
{
if (info == null)
{
info = MediaInfoWrapper.GetMediaInfo(source);
}
if (info.VideoStreams.Count > 0)
{
aspect = info.VideoStreams.First().DisplayAspectRatio;
}
}
return(Resolution.Calculate(aspect, profile.MaxOutputWidth, profile.MaxOutputHeight, 2));
}
public static Stream ExtractImage(MediaSource source, long startPosition, int?maxWidth, int?maxHeight)
{
if (!source.Exists)
{
Log.Warn("ExtractImage: Source {0} (resolved to path {1}) doesn't exists", source.GetDebugName(), source.GetPath());
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotFound);
return(Stream.Null);
}
if (!source.SupportsDirectAccess)
{
Log.Warn("ExtractImage: Extracting images from remote sources isn't supported yet", source.MediaType, source.Id);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.NotImplemented);
return(Stream.Null);
}
// calculate size
string ffmpegResize = "";
if (maxWidth != null || maxHeight != null)
{
try
{
decimal resolution = MediaInfoWrapper.GetMediaInfo(source).VideoStreams.First().DisplayAspectRatio;
ffmpegResize = "-s " + Resolution.Calculate(resolution, maxWidth, maxHeight).ToString();
}
catch (Exception ex)
{
Log.Error("Error while getting resolution of video stream, not resizing", ex);
}
}
// get temporary filename
string filename = String.Format("extract_{0}_{1}_{2}_{3}.jpg", source.GetUniqueIdentifier(), startPosition,
maxWidth == null ? "null" : maxWidth.ToString(), maxHeight == null ? "null" : maxHeight.ToString());
string tempFile = cache.GetPath(filename);
// maybe it exists in cache, return that then
if (cache.Contains(filename))
{
return(StreamImage(new ImageMediaSource(tempFile)));
}
// execute it
ProcessStartInfo info = new ProcessStartInfo();
using (var impersonator = source.GetImpersonator())
{
info.Arguments = String.Format("-ss {0} -i \"{1}\" {2} -vframes 1 -f image2 {3}", startPosition, source.GetPath(), ffmpegResize, tempFile);
info.FileName = Configuration.Streaming.FFMpegPath;
info.CreateNoWindow = true;
info.UseShellExecute = false;
Process proc = new Process();
proc.StartInfo = info;
proc.Start();
proc.WaitForExit();
}
// log when failed
if (!File.Exists(tempFile))
{
Log.Warn("Failed to extract image to temporary file {0} with command {1}", tempFile, info.Arguments);
WCFUtil.SetResponseCode(System.Net.HttpStatusCode.InternalServerError);
return(Stream.Null);
}
return(StreamImage(new ImageMediaSource(tempFile)));
}