Add feature: audio normalization during transcoding#1230

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YiranDuan721 wants to merge 2 commits intodevfrom 1186_entire_stream_recognized_as_pause

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Commits on Nov 6, 2023

#1206 implemented getInfoForAudioNormalization(), which executes the first pass of loudnorm filter, and store the information in the struct InfoForAudioNormalization. The information will be used i…
YiranDuan721
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Commits on Nov 7, 2023

#1206 Implement audio normalization using the loudnorm filter of ffmpeg: Apply the second pass of ffmpeg's loudnorm filter, by adding the filter to the ffmpeg command of transcoding.
YiranDuan721
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