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Use source audio bitrate if requested codec is lossless

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Shadowghost
2023-03-02 20:57:59 +01:00
parent 16f2cca882
commit 1f15724398
4 changed files with 48 additions and 44 deletions
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45
MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
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@@ -86,6 +86,16 @@ namespace MediaBrowser.Controller.MediaEncoding
{ "truehd", 6 },
};
public static readonly string[] LosslessAudioCodecs = new string[]
{
"alac",
"ape",
"flac",
"mlp",
"truehd",
"wavpack"
};
public EncodingHelper(
IApplicationPaths appPaths,
IMediaEncoder mediaEncoder,
@@ -2149,17 +2159,6 @@ namespace MediaBrowser.Controller.MediaEncoding
};
}
if (string.Equals(audioCodec, "flac", StringComparison.OrdinalIgnoreCase)
|| string.Equals(audioCodec, "alac", StringComparison.OrdinalIgnoreCase))
{
if (inputChannels >= 6)
{
return Math.Min(3584000, bitrate);
}
return Math.Min(1536000, bitrate);
}
if (string.Equals(audioCodec, "dts", StringComparison.OrdinalIgnoreCase)
|| string.Equals(audioCodec, "dca", StringComparison.OrdinalIgnoreCase))
{
@@ -2172,20 +2171,10 @@ namespace MediaBrowser.Controller.MediaEncoding
};
}
if (string.Equals(audioCodec, "truehd", StringComparison.OrdinalIgnoreCase))
{
return (inputChannels, outputChannels) switch
{
(> 0, > 0) => Math.Min(outputChannels * 768000, bitrate),
(> 0, _) => Math.Min(inputChannels * 768000, bitrate),
(_, _) => Math.Min(768000, bitrate)
};
}
// Empty bitrate area is not allow on iOS
// Default audio bitrate to 128K per channel if we don't have codec specific defaults
// https://ffmpeg.org/ffmpeg-codecs.html#toc-Codec-Options
return 128000 * (outputAudioChannels ?? audioStream.Channels ?? 1);
return 128000 * (outputAudioChannels ?? audioStream.Channels ?? 2);
}
public string GetAudioVbrModeParam(string encoder, int bitratePerChannel)
@@ -5867,8 +5856,7 @@ namespace MediaBrowser.Controller.MediaEncoding
}
var bitrate = state.OutputAudioBitrate;
if (bitrate.HasValue)
if (bitrate.HasValue && !LosslessAudioCodecs.Contains(codec, StringComparison.OrdinalIgnoreCase))
{
var vbrParam = GetAudioVbrModeParam(codec, bitrate.Value / (channels ?? 2));
if (encodingOptions.EnableAudioVbr && vbrParam is not null)
@@ -5897,10 +5885,11 @@ namespace MediaBrowser.Controller.MediaEncoding
var bitrate = state.OutputAudioBitrate;
var channels = state.OutputAudioChannels;
var outputCodec = state.OutputAudioCodec;
if (bitrate.HasValue)
if (bitrate.HasValue && !LosslessAudioCodecs.Contains(outputCodec, StringComparison.OrdinalIgnoreCase))
{
var vbrParam = GetAudioVbrModeParam(state.OutputAudioCodec, bitrate.Value / (channels ?? 2));
var vbrParam = GetAudioVbrModeParam(outputCodec, bitrate.Value / (channels ?? 2));
if (encodingOptions.EnableAudioVbr && vbrParam is not null)
{
audioTranscodeParams.Add(vbrParam);
@@ -5916,12 +5905,12 @@ namespace MediaBrowser.Controller.MediaEncoding
audioTranscodeParams.Add("-ac " + state.OutputAudioChannels.Value.ToString(CultureInfo.InvariantCulture));
}
if (!string.IsNullOrEmpty(state.OutputAudioCodec))
if (!string.IsNullOrEmpty(outputCodec))
{
audioTranscodeParams.Add("-acodec " + GetAudioEncoder(state));
}
if (!string.Equals(state.OutputAudioCodec, "opus", StringComparison.OrdinalIgnoreCase))
if (!string.Equals(outputCodec, "opus", StringComparison.OrdinalIgnoreCase))
{
// opus only supports specific sampling rates
var sampleRate = state.OutputAudioSampleRate;