[FFmpeg-user] converting broadcast wavs strips xml metadata

[Pete Coward]

ffmpeg supports decoding and encoding of broadcast wavs (bwf format)
but in my tests it strips the bext chunk from the input broadcast wav
when copying it, so not outputting a valid bwf file. is this a bug or
is it a configuration issue? i would be grateful for any advice.

input file has a bext chunk in aXML format
output file has no bext chunk

i am using bwfmetaedit (http://bwfmetaedit.sourceforge.net) to verify bext data.

ffmpeg -i MAVISwithISRC.wav -acodec copy -map_metadata 0 -write_id3v2
1 -id3v2_version 3 -strict -2  out.wav

ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 13 2014 13:00:18 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
  configuration: --prefix=/usr --libdir=/usr/lib64
--shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared
--enable-runtime-cpudetect --enable-gpl --enable-version3
--enable-postproc --enable-avfilter --enable-pthreads --enable-x11grab
--enable-vdpau --disable-avisynth --enable-frei0r --enable-libopencv
--enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable-libnut
--enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-librtmp --enable-libspeex
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264
--enable-libxavs --enable-libxvid --extra-cflags='-O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC'
--disable-stripping
  libavutil      52. 66.100 / 52. 66.100
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 33.100 / 55. 33.100
  libavdevice    55. 10.100 / 55. 10.100
  libavfilter     4.  2.100 /  4.  2.100
  libswscale      2.  5.102 /  2.  5.102
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, wav, from 'MAVISwithISRC.wav':
  Metadata:
    date            : 2015-04-18
    creation_time   : 10:15:33
    time_reference  : 0
    coding_history  : A=PCM,F=44100,W=16,M=stereo,T=Sonoris ISRC Editor
  Duration: 00:04:48.39, bitrate: 1411 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
Output #0, wav, to 'out.wav':
  Metadata:
    ICRD            : 2015-04-18
    creation_time   : 10:15:33
    time_reference  : 0
    coding_history  : A=PCM,F=44100,W=16,M=stereo,T=Sonoris ISRC Editor
    ISFT            : Lavf55.33.100
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, 1411 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size=   49680kB time=00:04:48.39 bitrate=1411.2kbits/s
video:0kB audio:49680kB subtitle:0 data:0 global headers:0kB muxing
overhead 0.000197%