[FFmpeg-user] -ab : syntax deprecated, use '|' to separate sample rate. ????

[sean darcy]

I'm transcoding from wav to m4a:

ffmpeg -i $f -vn -acodec aac -ab 128000 -strict experimental $f1.m4a

I get a deprecation warning on the sample rate that I can't understand:

ffmpeg version N-51822-gf17651b Copyright (c) 2000-2013 the FFmpeg 
developers
   built on Apr 10 2013 20:37:57 with gcc 4.7.2 (GCC) 20120921 (Red Hat 
4.7.2-2)
   configuration: --prefix=/usr --bindir=/usr/bin 
--datadir=/usr/share/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man 
--shlibdir=/usr/lib64 --extra-cflags='-Ofast -march=native -mtune=native 
-fopenmp -fomit-frame-pointer -pipe' --enable-static --enable-shared 
--enable-gpl --enable-nonfree --enable-version3 --enable-postproc 
--enable-avfilter --enable-pthreads --enable-x11grab --enable-gray 
--enable-vaapi --enable-hardcoded-tables --enable-libaacplus 
--enable-frei0r --enable-libfdk-aac --enable-libgsm --enable-libmp3lame 
--enable-libopenjpeg --enable-libopus --enable-librtmp 
--enable-libschroedinger --enable-libspeex --enable-libtheora 
--enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid 
--enable-zlib --disable-debug --cpu=amdfam10 --arch=x86_64 --enable-pic 
--enable-libopencv --enable-openssl
   libavutil      52. 25.100 / 52. 25.100
   libavcodec     55.  2.100 / 55.  2.100
   libavformat    55.  2.100 / 55.  2.100
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 50.103 /  3. 50.103
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
[wav @ 0x1e899a0] max_analyze_duration 5000000 reached at 5015510 
microseconds
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, wav, from '9.1_Politics.wav':
   Duration: 00:44:52.64, bitrate: 1411 kb/s
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 
stereo, s16, 1411 kb/s
[audio format for output stream 0:0 @ 0x1e9d440] This syntax is 
deprecated, use '|' to separate sample rate.
Output #0, ipod, to '09.1_Politics.m4a':
   Metadata:
     encoder         : Lavf55.2.100
     Stream #0:0: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, 
fltp, 128 kb/s

 From ffmpeg help:

   -ab  <int>   E...A. set bitrate (in bits/s) (from 0 to INT_MAX)


Thanks,

sean