On Mon, Feb 14, 2022 at 1:50 PM Remko Tronçon <re...@el-tramo.be> wrote:
> Hi, > > When I run an audio file through the 'loudnorm' filter, I get the > following: > > ffmpeg -i <file> -af loudnorm=print_format=json -f null - > ... > "input_i" : "-13.87", > "input_tp" : "0.06", > "input_lra" : "8.50", > "input_thresh" : "-24.45", > ... > > When I run the same audio file through the ebur128 filter, I get the > following: > > > ffmpeg -i <file> -af ebur128 -f null - > Integrated loudness: > I: -13.8 LUFS > Threshold: -24.4 LUFS > Loudness range: > LRA: 8.7 LU > Threshold: -34.3 LUFS > LRA low: -20.1 LUFS > LRA high: -11.4 LUFS > > Why are these measurements different? Even if rounding would be towards 0, > that would not explain the LRA difference? > Run ebur128=peak=true, than it will use same sample rate as loudnorm filter, 192000 Also do note that ebur128 output is rounded to 1 decimal and loudnorm to 2 decimals The metadata output of ebur128 is rounded to 3 decimals. > > thanks, > Remko > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".