[FFmpeg-user] Audio, loudnorm for videos

[Richard Bartczak]

Example of use of http://k.ylo.ph/2016/04/04/loudnorm.html

A way to get a video with a better relationship of loudness for speech,
music and "Action-Thunder"

Perhaps all ways known, perhaps not.

Example of video with ac3 + h.264

ffmpeg filter, /dual-pass/ mode :

1. Measurement  with results :

ffmpeg -i "Desperado.ts" -c:v copy -filter:a
loudnorm=I=-16:TP=-1.5:LRA=11:print_format=summary -f null -

...

Input Integrated:    -26.0 LUFS
Input True Peak:      -3.1 dBTP
Input LRA:            18.1 LU
Input Threshold:     -37.4 LUFS

Output Integrated:   -17.0 LUFS
Output True Peak:     -1.5 dBTP
Output LRA:           11.8 LU
Output Threshold:    -27.7 LUFS

Normalization Type:   Dynamic
Target Offset:        +1.0 LU

"Desperado.ts" renamed to "Desperado .ts,

2. use of measurements  :

ffmpeg -i "Desperado .ts" -c:v copy -af
loudnorm=I=-16:TP=-1.5:LRA=11:measured_I=-26.0:measured_TP=-3.1:measured_LRA=18.1:measured_thresh=-37.4:offset=+1.0:linear=true:print_format=summary
-c:a ac3 -b:a 448k -ar 48000 "Desperado.ts"

Worth to try.

regards