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Add audio vbr calculation

This commit is contained in:
knackebrot 2022-11-07 00:15:04 +01:00 committed by Shadowghost
parent 3e74377036
commit aa99aaebc4
3 changed files with 91 additions and 8 deletions
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29
Jellyfin.Api/Controllers/DynamicHlsController.cs
View File

@ -1685,14 +1685,25 @@ public class DynamicHlsController : BaseJellyfinApiController
audioTranscodeParams += "-acodec " + audioCodec;
if (state.OutputAudioBitrate.HasValue)
var audioBitrate = state.OutputAudioBitrate;
var audioChannels = state.OutputAudioChannels;
if (audioBitrate.HasValue)
{
audioTranscodeParams += " -ab " + state.OutputAudioBitrate.Value.ToString(CultureInfo.InvariantCulture);
string vbrParam;
if (_encodingOptions.EnableAudioVbr && (vbrParam = _encodingHelper.GetAudioVbrModeParam(state.OutputAudioCodec, audioBitrate.Value / audioChannels ?? 2)) != null)
{
audioTranscodeParams += vbrParam;
}
else
{
audioTranscodeParams += " -ab " + audioBitrate.Value.ToString(CultureInfo.InvariantCulture);
}
}
if (state.OutputAudioChannels.HasValue)
if (audioChannels.HasValue)
{
audioTranscodeParams += " -ac " + state.OutputAudioChannels.Value.ToString(CultureInfo.InvariantCulture);
audioTranscodeParams += " -ac " + audioChannels.Value.ToString(CultureInfo.InvariantCulture);
}
if (state.OutputAudioSampleRate.HasValue)
@ -1747,7 +1758,15 @@ public class DynamicHlsController : BaseJellyfinApiController
if (bitrate.HasValue)
{
args += " -ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture);
string vbrParam;
if (_encodingOptions.EnableAudioVbr && (vbrParam = _encodingHelper.GetAudioVbrModeParam(state.OutputAudioCodec, bitrate.Value / channels ?? 2)) != null)
{
args += vbrParam;
}
else
{
args += " -ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture);
}
}
if (state.OutputAudioSampleRate.HasValue)

64
MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
View File

@ -2160,6 +2160,47 @@ namespace MediaBrowser.Controller.MediaEncoding
return 128000;
}
public string GetAudioVbrModeParam(string encoder, int bitratePerChannel)
{
if (encoder == "libfdk_aac")
{
return " -vbr:a " + bitratePerChannel switch
{
< 32000 => "1",
< 48000 => "2",
< 64000 => "3",
< 96000 => "4",
_ => "5"
};
}
if (encoder == "libmp3lame")
{
return " -qscale:a " + bitratePerChannel switch
{
< 48000 => "8",
< 64000 => "6",
< 88000 => "4",
< 112000 => "2",
_ => "0"
};
}
if (encoder == "libvorbis")
{
return " -qscale:a " + bitratePerChannel switch
{
< 40000 => "0",
< 56000 => "2",
< 80000 => "4",
< 112000 => "6",
_ => "8"
};
}
return null;
}
public string GetAudioFilterParam(EncodingJobInfo state, EncodingOptions encodingOptions)
{
var channels = state.OutputAudioChannels;
@ -5801,7 +5842,15 @@ namespace MediaBrowser.Controller.MediaEncoding
if (bitrate.HasValue)
{
args += " -ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture);
string vbrParam;
if (encodingOptions.EnableAudioVbr && (vbrParam = GetAudioVbrModeParam(codec, bitrate.Value / channels ?? 2)) != null)
{
args += vbrParam;
}
else
{
args += " -ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture);
}
}
if (state.OutputAudioSampleRate.HasValue)
@ -5819,13 +5868,22 @@ namespace MediaBrowser.Controller.MediaEncoding
var audioTranscodeParams = new List<string>();
var bitrate = state.OutputAudioBitrate;
var channels = state.OutputAudioChannels;
if (bitrate.HasValue)
{
audioTranscodeParams.Add("-ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture));
string vbrParam;
if (encodingOptions.EnableAudioVbr && (vbrParam = GetAudioVbrModeParam(state.OutputAudioCodec, bitrate.Value / channels ?? 2)) != null)
{
audioTranscodeParams.Add(vbrParam);
}
else
{
audioTranscodeParams.Add("-ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture));
}
}
if (state.OutputAudioChannels.HasValue)
if (channels.HasValue)
{
audioTranscodeParams.Add("-ac " + state.OutputAudioChannels.Value.ToString(CultureInfo.InvariantCulture));
}

6
MediaBrowser.Model/Configuration/EncodingOptions.cs
View File

@ -14,6 +14,7 @@ public class EncodingOptions
public EncodingOptions()
{
EnableFallbackFont = false;
EnableAudioVbr = false;
DownMixAudioBoost = 2;
DownMixStereoAlgorithm = DownMixStereoAlgorithms.None;
MaxMuxingQueueSize = 2048;
@ -70,6 +71,11 @@ public class EncodingOptions
/// </summary>
public bool EnableFallbackFont { get; set; }
/// <summary>
/// Gets or sets a value indicating whether audio VBR is enabled.
/// </summary>
public bool EnableAudioVbr { get; set; }
/// <summary>
/// Gets or sets the audio boost applied when downmixing audio.
/// </summary>