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Merge pull request #4860 from nyanmisaka/3ch-transcode-hls
Avoid transcoding to 3ch audio for HLS streaming
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1 changed files with 10 additions and 0 deletions
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@ -1722,6 +1722,16 @@ namespace MediaBrowser.Controller.MediaEncoding
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: transcoderChannelLimit.Value;
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}
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// Avoid transcoding to audio channels other than 1ch, 2ch, 6ch (5.1 layout) and 8ch (7.1 layout).
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// https://developer.apple.com/documentation/http_live_streaming/hls_authoring_specification_for_apple_devices
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if (isTranscodingAudio
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&& state.TranscodingType != TranscodingJobType.Progressive
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&& resultChannels.HasValue
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&& (resultChannels.Value > 2 && resultChannels.Value < 6 || resultChannels.Value == 7))
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{
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resultChannels = 2;
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}
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return resultChannels;
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}
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