~/norm$ ffmpeg -v debug -i norm_tAy6wnTbQUFY_vQ.wav -af dynaudnorm=m=100.0:r=0.3 dynanorm_tAy6wnTbQUFY_vQ.wav ffmpeg version 2.8.5 Copyright (c) 2000-2016 the FFmpeg developers built with Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn) configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.5 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfdk-aac --enable-nonfree --enable-vda libavutil 54. 31.100 / 54. 31.100 libavcodec 56. 60.100 / 56. 60.100 libavformat 56. 40.101 / 56. 40.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 40.101 / 5. 40.101 libavresample 2. 1. 0 / 2. 1. 0 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 2.101 / 1. 2.101 libpostproc 53. 3.100 / 53. 3.100 Splitting the commandline. Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'. Reading option '-i' ... matched as input file with argument 'norm_tAy6wnTbQUFY_vQ.wav'. Reading option '-af' ... matched as option 'af' (set audio filters) with argument 'dynaudnorm=m=100.0:r=0.3'. Reading option 'dynanorm_tAy6wnTbQUFY_vQ.wav' ... matched as output file. Finished splitting the commandline. Parsing a group of options: global . Applying option v (set logging level) with argument debug. Successfully parsed a group of options. Parsing a group of options: input file norm_tAy6wnTbQUFY_vQ.wav. Successfully parsed a group of options. Opening an input file: norm_tAy6wnTbQUFY_vQ.wav. [wav @ 0x7fc0fa800a00] Format wav probed with size=2048 and score=99 [wav @ 0x7fc0fa800a00] Before avformat_find_stream_info() pos: 78 bytes read:32768 seeks:0 [wav @ 0x7fc0fa800a00] probing stream 0 pp:32 [wav @ 0x7fc0fa800a00] probing stream 0 pp:31 [wav @ 0x7fc0fa800a00] probing stream 0 pp:30 [wav @ 0x7fc0fa800a00] probing stream 0 pp:29 [wav @ 0x7fc0fa800a00] probing stream 0 pp:28 [wav @ 0x7fc0fa800a00] probing stream 0 pp:27 [wav @ 0x7fc0fa800a00] probing stream 0 pp:26 [wav @ 0x7fc0fa800a00] probing stream 0 pp:25 [wav @ 0x7fc0fa800a00] probing stream 0 pp:24 [wav @ 0x7fc0fa800a00] probing stream 0 pp:23 [wav @ 0x7fc0fa800a00] probing stream 0 pp:22 [wav @ 0x7fc0fa800a00] probing stream 0 pp:21 [wav @ 0x7fc0fa800a00] probing stream 0 pp:20 [wav @ 0x7fc0fa800a00] probing stream 0 pp:19 [wav @ 0x7fc0fa800a00] probing stream 0 pp:18 [wav @ 0x7fc0fa800a00] probing stream 0 pp:17 [wav @ 0x7fc0fa800a00] probing stream 0 pp:16 [wav @ 0x7fc0fa800a00] probing stream 0 pp:15 [wav @ 0x7fc0fa800a00] probing stream 0 pp:14 [wav @ 0x7fc0fa800a00] probing stream 0 pp:13 [wav @ 0x7fc0fa800a00] probing stream 0 pp:12 [wav @ 0x7fc0fa800a00] probing stream 0 pp:11 [wav @ 0x7fc0fa800a00] probing stream 0 pp:10 [wav @ 0x7fc0fa800a00] probing stream 0 pp:9 [wav @ 0x7fc0fa800a00] probing stream 0 pp:8 [wav @ 0x7fc0fa800a00] probing stream 0 pp:7 [wav @ 0x7fc0fa800a00] probing stream 0 pp:6 [wav @ 0x7fc0fa800a00] probing stream 0 pp:5 [wav @ 0x7fc0fa800a00] probing stream 0 pp:4 [wav @ 0x7fc0fa800a00] probing stream 0 pp:3 [wav @ 0x7fc0fa800a00] probing stream 0 pp:2 [wav @ 0x7fc0fa800a00] probing stream 0 pp:1 [wav @ 0x7fc0fa800a00] probed stream 0 [wav @ 0x7fc0fa800a00] parser not found for codec pcm_s16le, packets or times may be invalid. [wav @ 0x7fc0fa800a00] All info found [wav @ 0x7fc0fa800a00] After avformat_find_stream_info() pos: 204878 bytes read:229376 seeks:0 frames:50 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, wav, from 'norm_tAy6wnTbQUFY_vQ.wav': Metadata: encoder : Lavf56.40.101 Duration: 00:00:05.32, bitrate: 1411 kb/s Stream #0:0, 50, 1/44100: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s Successfully opened the file. Parsing a group of options: output file dynanorm_tAy6wnTbQUFY_vQ.wav. Applying option af (set audio filters) with argument dynaudnorm=m=100.0:r=0.3. Successfully parsed a group of options. Opening an output file: dynanorm_tAy6wnTbQUFY_vQ.wav. Successfully opened the file. detected 4 logical cores [Parsed_dynaudnorm_0 @ 0x7fc0f9c21c20] Setting 'm' to value '100.0' [Parsed_dynaudnorm_0 @ 0x7fc0f9c21c20] Setting 'r' to value '0.3' [graph 0 input from stream 0:0 @ 0x7fc0f9d033c0] Setting 'time_base' to value '1/44100' [graph 0 input from stream 0:0 @ 0x7fc0f9d033c0] Setting 'sample_rate' to value '44100' [graph 0 input from stream 0:0 @ 0x7fc0f9d033c0] Setting 'sample_fmt' to value 's16' [graph 0 input from stream 0:0 @ 0x7fc0f9d033c0] Setting 'channel_layout' to value '0x3' [graph 0 input from stream 0:0 @ 0x7fc0f9d033c0] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3 [audio format for output stream 0:0 @ 0x7fc0f9c221c0] Setting 'sample_fmts' to value 's16' [Parsed_dynaudnorm_0 @ 0x7fc0f9c21c20] auto-inserting filter 'auto-inserted resampler 0' between the filter 'graph 0 input from stream 0:0' and the filter 'Parsed_dynaudnorm_0' [audio format for output stream 0:0 @ 0x7fc0f9c221c0] auto-inserting filter 'auto-inserted resampler 1' between the filter 'Parsed_dynaudnorm_0' and the filter 'audio format for output stream 0:0' [AVFilterGraph @ 0x7fc0f9c219e0] query_formats: 4 queried, 3 merged, 6 already done, 0 delayed [auto-inserted resampler 0 @ 0x7fc0f9d043c0] [SWR @ 0x7fc0fa823a00] Using s16p internally between filters [auto-inserted resampler 0 @ 0x7fc0f9d043c0] ch:2 chl:stereo fmt:s16 r:44100Hz -> ch:2 chl:stereo fmt:dblp r:44100Hz [Parsed_dynaudnorm_0 @ 0x7fc0f9c21c20] frame len 22050 [auto-inserted resampler 1 @ 0x7fc0f9d048e0] [SWR @ 0x7fc0fa02de00] Using dblp internally between filters [auto-inserted resampler 1 @ 0x7fc0f9d048e0] ch:2 chl:stereo fmt:dblp r:44100Hz -> ch:2 chl:stereo fmt:s16 r:44100Hz Output #0, wav, to 'dynanorm_tAy6wnTbQUFY_vQ.wav': Metadata: ISFT : Lavf56.40.101 Stream #0:0, 0, 1/44100: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s Metadata: encoder : Lavc56.60.100 pcm_s16le Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native)) Press [q] to stop, [?] for help [output stream 0:0 @ 0x7fc0f9c22040] EOF on sink link output stream 0:0:default. No more output streams to write to, finishing. size= 916kB time=00:00:05.31 bitrate=1411.3kbits/s video:0kB audio:916kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.008316% Input file #0 (norm_tAy6wnTbQUFY_vQ.wav): Input stream #0:0 (audio): 229 packets read (937984 bytes); 229 frames decoded (234496 samples); Total: 229 packets (937984 bytes) demuxed Output file #0 (dynanorm_tAy6wnTbQUFY_vQ.wav): Output stream #0:0 (audio): 11 frames encoded (234496 samples); 11 packets muxed (937984 bytes); Total: 11 packets (937984 bytes) muxed 229 frames successfully decoded, 0 decoding errors [AVIOContext @ 0x7fc0f9d03f00] Statistics: 4 seeks, 35 writeouts [AVIOContext @ 0x7fc0f9d02f00] Statistics: 938062 bytes read, 0 seeks