Technology Sharing

한어Русский языкEnglishFrançaisIndonesianSanskrit日本語DeutschPortuguêsΕλληνικάespañolItalianoSuomalainenLatina

FFmpeg usage ebur128 The filter detects sound pressure. EBU R128 is the audio loudness measurement and normalization standard recommended by the European Broadcasting Union (EBU).

ffmpeg -i input_video.mp4 -filter_complex ebur128=peak=true -f null -

-f null -: Discard the output and only display the result of the filter.

The output is as follows

[Parsed_ebur128_0 @ 04d0b100] t: 59.3213    TARGET:-23 LUFS    M: -18.4 S: -18.5     I: -17.9 LUFS       LRA:  14.6 LU  FTPK: -10.5 -10.3 dBFS  TPK:  -6.3  -7.1 dBFS
[Parsed_ebur128_0 @ 04d0b100] t: 59.4213    TARGET:-23 LUFS    M: -18.3 S: -18.7     I: -17.9 LUFS       LRA:  14.6 LU  FTPK: -14.4 -15.2 dBFS  TPK:  -6.3  -7.1 dBFS
[Parsed_ebur128_0 @ 04d0b100] t: 59.5213    TARGET:-23 LUFS    M: -20.1 S: -18.7     I: -17.9 LUFS       LRA:  14.6 LU  FTPK: -13.2 -13.8 dBFS  TPK:  -6.3  -7.1 dBFS
[Parsed_ebur128_0 @ 04d0b100] t: 59.6213    TARGET:-23 LUFS    M: -20.6 S: -18.7     I: -17.9 LUFS       LRA:  14.6 LU  FTPK: -14.2 -14.9 dBFS  TPK:  -6.3  -7.1 dBFS
[Parsed_ebur128_0 @ 04d0b100] t: 59.7213    TARGET:-23 LUFS    M: -21.9 S: -18.6     I: -17.9 LUFS       LRA:  14.5 LU  FTPK:  -9.6 -11.8 dBFS  TPK:  -6.3  -7.1 dBFS
[Parsed_ebur128_0 @ 04d0b100] t: 59.8213    TARGET:-23 LUFS    M: -20.3 S: -18.7     I: -17.9 LUFS       LRA:  14.5 LU  FTPK: -10.6 -10.3 dBFS  TPK:  -6.3  -7.1 dBFS
[Parsed_ebur128_0 @ 04d0b100] t: 59.9213    TARGET:-23 LUFS    M: -20.9 S: -19.0     I: -17.9 LUFS       LRA:  14.5 LU  FTPK: -16.0 -22.1 dBFS  TPK:  -6.3  -7.1 dBFS
frame= 1500 fps=1254 q=-0.0 Lsize=N/A time=00:01:00.01 bitrate=N/A speed=50.2x
video:598kB audio:11248kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[Parsed_ebur128_0 @ 04d0b100] Summary:

  Integrated loudness:
    I:         -17.9 LUFS
    Threshold: -28.7 LUFS

  Loudness range:
    LRA:        14.5 LU
    Threshold: -39.1 LUFS
    LRA low:   -31.4 LUFS
    LRA high:  -16.9 LUFS

  True peak:
    Peak:       -6.3 dBFS

• Integrated loudness: Indicates the overall sound pressure level of the audio file.
• Momentary loudness: Indicates the sound pressure level within a short period of time (about 400ms).
• Short-term loudness: refers to the sound pressure level within a medium period of time (about 3 seconds).
• LRA (Loudness Range): Indicates the sound pressure range of the audio file.
• True peak: Indicates the maximum peak value of the audio signal.
• LUFS (Loudness Units relative to Full Scale) is a unit of measurement for audio loudness, especially for broadcast and audio streaming. It was proposed by the International Telecommunication Union (ITU) and the European Broadcasting Union (EBU) to measure perceived loudness rather than simple signal strength.
• dBFS (decibels relative to Full Scale) is a unit of measurement for audio signal levels, expressed in decibels relative to the maximum representable level (full scale) in digital audio systems.