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adjust bitrate in h264/h265 conversions

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This commit is contained in:
Luke Pulverenti 2016-06-06 13:33:55 -04:00
parent 3e066ab9f5
commit faefbf36cc
4 changed files with 37 additions and 5 deletions
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10
MediaBrowser.Api/Playback/BaseStreamingService.cs
View File

@ -1207,7 +1207,7 @@ namespace MediaBrowser.Api.Playback
}
}
private int? GetVideoBitrateParamValue(VideoStreamRequest request, MediaStream videoStream)
private int? GetVideoBitrateParamValue(VideoStreamRequest request, MediaStream videoStream, string outputVideoCodec)
{
var bitrate = request.VideoBitRate;
@ -1232,6 +1232,12 @@ namespace MediaBrowser.Api.Playback
}
}
if (bitrate.HasValue)
{
var inputVideoCodec = videoStream == null ? null : videoStream.Codec;
bitrate = ResolutionNormalizer.ScaleBitrate(bitrate.Value, inputVideoCodec, outputVideoCodec);
}
return bitrate;
}
@ -1692,7 +1698,7 @@ namespace MediaBrowser.Api.Playback
if (videoRequest != null)
{
state.OutputVideoCodec = state.VideoRequest.VideoCodec;
state.OutputVideoBitrate = GetVideoBitrateParamValue(state.VideoRequest, state.VideoStream);
state.OutputVideoBitrate = GetVideoBitrateParamValue(state.VideoRequest, state.VideoStream, state.OutputVideoCodec);
if (state.OutputVideoBitrate.HasValue)
{

2
MediaBrowser.Api/Subtitles/SubtitleService.cs
View File

@ -221,7 +221,7 @@ namespace MediaBrowser.Api.Subtitles
if (string.Equals(request.Format, "vtt", StringComparison.OrdinalIgnoreCase) && request.AddVttTimeMap)
{
text = text.Replace("WEBVTT", "WEBVTT\nX-TIMESTAMP-MAP=MPEGTS:900000,LOCAL:00:00:00.000");
//text = text.Replace("WEBVTT", "WEBVTT\nX-TIMESTAMP-MAP=MPEGTS:900000,LOCAL:00:00:00.000");
}
return ResultFactory.GetResult(text, MimeTypes.GetMimeType("file." + request.Format));

10
MediaBrowser.MediaEncoding/Encoder/EncodingJobFactory.cs
View File

@ -99,7 +99,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
if (videoRequest != null)
{
state.OutputVideoCodec = state.Options.VideoCodec;
state.OutputVideoBitrate = GetVideoBitrateParamValue(state.Options, state.VideoStream);
state.OutputVideoBitrate = GetVideoBitrateParamValue(state.Options, state.VideoStream, state.OutputVideoCodec);
if (state.OutputVideoBitrate.HasValue)
{
@ -396,7 +396,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
return request.AudioChannels;
}
private int? GetVideoBitrateParamValue(EncodingJobOptions request, MediaStream videoStream)
private int? GetVideoBitrateParamValue(EncodingJobOptions request, MediaStream videoStream, string outputVideoCodec)
{
var bitrate = request.VideoBitRate;
@ -421,6 +421,12 @@ namespace MediaBrowser.MediaEncoding.Encoder
}
}
if (bitrate.HasValue)
{
var inputVideoCodec = videoStream == null ? null : videoStream.Codec;
bitrate = ResolutionNormalizer.ScaleBitrate(bitrate.Value, inputVideoCodec, outputVideoCodec);
}
return bitrate;
}

20
MediaBrowser.Model/Dlna/ResolutionNormalizer.cs
View File

@ -56,5 +56,25 @@ namespace MediaBrowser.Model.Dlna
MaxHeight = maxHeight
};
}
private static double GetVideoBitrateScaleFactor(string codec)
{
if (string.Equals(codec, "h265", StringComparison.OrdinalIgnoreCase) ||
string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase))
{
return .5;
}
return 1;
}
public static int ScaleBitrate(int bitrate, string inputVideoCodec, string outputVideoCodec)
{
var inputScaleFactor = GetVideoBitrateScaleFactor(inputVideoCodec);
var outputScaleFactor = GetVideoBitrateScaleFactor(outputVideoCodec);
var scaleFactor = outputScaleFactor/inputScaleFactor;
var newBitrate = scaleFactor*bitrate;
return Convert.ToInt32(newBitrate);
}
}
}