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media assets: don't round volume levels.

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At first we rounded loudness values to 4 decimal places to make them
easier to compare. This meant the lowest level was 0.0001, or -80 dB,
but it's possible for volume levels to go even lower than that.
This commit is contained in:
evazion
2022-11-05 00:29:44 -05:00
parent e005520ad8
commit 4a241ac6b5
2 changed files with 15 additions and 15 deletions
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6
app/logical/ffmpeg.rb
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@@ -155,7 +155,7 @@ class FFmpeg
# have an audio track. If the silence percentage is 100%, then the audio track is totally silent.
def silence_percentage
return nil if !has_audio? || duration.to_f == 0.0
(silence_duration.to_f / duration).clamp(0.0, 1.0).round(4)
(silence_duration.to_f / duration).clamp(0.0, 1.0)
end
# The average loudness of the audio track, as a percentage of max volume. 0% is silent and 100% is max volume.
@@ -166,7 +166,7 @@ class FFmpeg
# @return [Float, nil] The average loudness as a percent, or nil if the file doesn't have an audio track.
# @see https://en.wikipedia.org/wiki/EBU_R_128
def average_loudness
10.pow(average_loudness_lufs / 20.0).round(4) if average_loudness_lufs.present?
10.pow(average_loudness_lufs / 20.0) if average_loudness_lufs.present?
end
# The average loudness of the audio track, in LUFS units. -70.0 is silent and 0.0 is max volume.
@@ -203,7 +203,7 @@ class FFmpeg
# @return [Float, nil] The peak loudness in dBFS, or nil if the file doesn't have an audio track.
# @see https://en.wikipedia.org/wiki/EBU_R_128
def peak_loudness
10.pow(peak_loudness_dbfs / 20.0).round(4) if peak_loudness_dbfs.present?
10.pow(peak_loudness_dbfs / 20.0) if peak_loudness_dbfs.present?
end
# The peak loudness of the audio track, in dBFS (decibels referenced to full scale). 0.0 is 100%