blob: 7d87c5e154aca1bde4ec81dd2693904bcd3906c5
1 | #!/usr/bin/env python2 |
2 | |
3 | import sys, subprocess |
4 | |
5 | if len(sys.argv) > 2: |
6 | ifile = sys.argv[1] |
7 | encopt = sys.argv[2:-1] |
8 | ofile = sys.argv[-1] |
9 | else: |
10 | print 'usage: %s <input> [encode_options] <output>' % sys.argv[0] |
11 | sys.exit(1) |
12 | |
13 | analysis_cmd = 'ffprobe -v error -of compact=p=0:nk=1 ' |
14 | analysis_cmd += '-show_entries frame_tags=lavfi.r128.I -f lavfi ' |
15 | analysis_cmd += "amovie='%s',ebur128=metadata=1" % ifile |
16 | try: |
17 | probe_out = subprocess.check_output(analysis_cmd, shell=True) |
18 | except subprocess.CalledProcessError, e: |
19 | sys.exit(e.returncode) |
20 | loudness = ref = -23 |
21 | for line in probe_out.splitlines(): |
22 | sline = line.rstrip() |
23 | if sline: |
24 | loudness = sline |
25 | adjust = ref - float(loudness) |
26 | if abs(adjust) < 0.0001: |
27 | print 'No normalization needed for ' + ifile |
28 | else: |
29 | print "Adjust %s by %.1fdB" % (ifile, adjust) |
30 | norm_cmd = ['ffmpeg', '-i', ifile, '-af', 'volume=%fdB' % adjust] |
31 | norm_cmd += encopt + [ofile] |
32 | print ' => %s' % ' '.join(norm_cmd) |
33 | subprocess.call(norm_cmd) |
34 |