mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.4 KiB
61 lines
1.4 KiB
#!/usr/bin/env ruby |
|
|
|
require 'open3' |
|
require 'json' |
|
|
|
ffmpeg_bin = 'ffmpeg' |
|
target_il = -24.0 |
|
target_lra = +11.0 |
|
target_tp = -2.0 |
|
samplerate = '48k' |
|
|
|
if ARGF.argv.count != 2 |
|
puts "Usage: #{$PROGRAM_NAME} input.wav output.wav" |
|
exit 1 |
|
end |
|
|
|
ff_cmd = Array.new([ |
|
ffmpeg_bin, |
|
'-hide_banner', |
|
'-i', ARGF.argv[0], |
|
'-af', "loudnorm='I=#{target_il}:LRA=#{target_lra}:tp=#{target_tp}:print_format=json'", |
|
'-f', 'null', |
|
'-']); |
|
|
|
_stdin, _stdout, stderr, wait_thr = Open3.popen3(*ff_cmd) |
|
|
|
if wait_thr.value.success? |
|
stats = JSON.parse(stderr.read.lines[-12, 12].join) |
|
loudnorm_string = 'loudnorm=' |
|
loudnorm_string += 'print_format=summary:' |
|
loudnorm_string += 'linear=true:' |
|
loudnorm_string += "I=#{target_il}:" |
|
loudnorm_string += "LRA=#{target_lra}:" |
|
loudnorm_string += "tp=#{target_tp}:" |
|
loudnorm_string += "measured_I=#{stats['input_i']}:" |
|
loudnorm_string += "measured_LRA=#{stats['input_lra']}:" |
|
loudnorm_string += "measured_tp=#{stats['input_tp']}:" |
|
loudnorm_string += "measured_thresh=#{stats['input_thresh']}:" |
|
loudnorm_string += "offset=#{stats['target_offset']}" |
|
else |
|
puts stderr.read |
|
exit 1 |
|
end |
|
|
|
ff_cmd = Array.new([ |
|
ffmpeg_bin, |
|
'-y', '-hide_banner', |
|
'-i', ARGF.argv[0], |
|
'-af', loudnorm_string, |
|
'-ar', samplerate, |
|
ARGF.argv[1].to_s]); |
|
|
|
_stdin, _stdout, stderr, wait_thr = Open3.popen3(*ff_cmd) |
|
|
|
if wait_thr.value.success? |
|
puts stderr.read.lines[-12, 12].join |
|
exit 0 |
|
else |
|
puts stderr.read |
|
exit 1 |
|
end
|
|
|