wav: support integer 64bit

[ami_stuff]

​https://www.datafilehost.com/d/de7830b4

exported from Audition

C:\>ffmpeg -i D:\integer_64bit.wav
ffmpeg version N-80343-geaa1143 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.5.0 (GCC) 20100414 (Fedora MinGW 4.5.0-1.fc14)
  configuration: --prefix=/var/www/users/research/ffmpeg/snapshots/build --arch=
x86 --target-os=mingw32 --cross-prefix=i686-pc-mingw32- --cc='ccache i686-pc-min
gw32-gcc' --enable-pthreads --enable-memalign-hack --enable-runtime-cpudetect --
enable-cross-compile --enable-static --disable-shared --extra-libs='-lws2_32 -lw
inmm -lpthread' --extra-cflags='--static -I/var/www/users/research/ffmpeg/snapsh
ots/build/include' --extra-ldflags='-static -L/var/www/users/research/ffmpeg/sna
pshots/build/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-version3 --
enable-nonfree --enable-libx264 --enable-libspeex --enable-libtheora --enable-li
bvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb --enable-li
bopencore-amrwb --enable-libmp3lame --enable-libfreetype --enable-libvpx --disab
le-decoder=libvpx
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 46.100 / 57. 46.100
  libavformat    57. 38.100 / 57. 38.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.101 /  6. 46.101
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
  libpostproc    54.  0.100 / 54.  0.100
[wav @ 0x28d3d20] Estimating duration from bitrate, this may be inaccurate
[wav @ 0x28d3d20] Could not find codec parameters for stream 0 (Audio: none ([1]
[0][0][0] / 0x0001), 44100 Hz, 2 channels, 5644 kb/s): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, wav, from 'D:\integer_64bit.wav':
  Duration: 00:00:08.55, bitrate: 5644 kb/s
    Stream #0:0: Audio: none ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, 5644
 kb/s
At least one output file must be specified

[James]

Please follow the instructions from https://ffmpeg.org/bugreports.html and either upload the sample to the FTP, to some decent hosting service, or provide a smaller sample that can be attached to this ticket (2.5mb max).

The link you provided serves a potentially malicious executable instead of the wav file in question.

[Elon Musk]

Fixed in fc600eff630faebda980b7d6fcf02569ebd3bb11.