34 lines
1,018 B
Python
34 lines
1,018 B
Python
|
#!/usr/bin/env python2
|
||
|
|
|
||
|
|
import sys, subprocess
|
||
|
|
|
||
|
|
if len(sys.argv) > 2:
|
||
|
|
ifile = sys.argv[1]
|
||
|
|
encopt = sys.argv[2:-1]
|
||
|
|
ofile = sys.argv[-1]
|
||
|
|
else:
|
||
|
|
print 'usage: %s <input> [encode_options] <output>' % sys.argv[0]
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
analysis_cmd = 'ffprobe -v error -of compact=p=0:nk=1 '
|
||
|
|
analysis_cmd += '-show_entries frame_tags=lavfi.r128.I -f lavfi '
|
||
|
|
analysis_cmd += "amovie='%s',ebur128=metadata=1" % ifile
|
||
|
|
try:
|
||
|
|
probe_out = subprocess.check_output(analysis_cmd, shell=True)
|
||
|
|
except subprocess.CalledProcessError, e:
|
||
|
|
sys.exit(e.returncode)
|
||
|
|
loudness = ref = -23
|
||
|
|
for line in probe_out.splitlines():
|
||
|
|
sline = line.rstrip()
|
||
|
|
if sline:
|
||
|
|
loudness = sline
|
||
|
|
adjust = ref - float(loudness)
|
||
|
|
if abs(adjust) < 0.0001:
|
||
|
|
print 'No normalization needed for ' + ifile
|
||
|
|
else:
|
||
|
|
print "Adjust %s by %.1fdB" % (ifile, adjust)
|
||
|
|
norm_cmd = ['ffmpeg', '-i', ifile, '-af', 'volume=%fdB' % adjust]
|
||
|
|
norm_cmd += encopt + [ofile]
|
||
|
|
print ' => %s' % ' '.join(norm_cmd)
|
||
|
|
subprocess.call(norm_cmd)
|