[FFmpeg-user] Post problem: export long wav files (incorrect/limited length)

[Stas Fomin]

I have problem with export long wav files (>8 hours) from a video.

Exported files have length only about 2.5 hour (but "good" size).

<pre>
ffmpeg.exe -analyzeduration 999999999 -i aud.scenario.avs$lossless.avi  -f wav d2.wav
ffmpeg version N-46469-gc995644 Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov  5 2012 17:54:28 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runt
ime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass -
-enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enab
le-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libo
pus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheo
ra --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena
ble-zlib
  libavutil      52.  5.100 / 52.  5.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 21.106 /  3. 21.106
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[avi @ 022ab5a0] non-interleaved AVI
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, avi, from 'aud.scenario.avs$lossless.avi':
  Metadata:
    encoder         : Lavf53.2.0
  Duration: 08:26:37.00, start: 0.000000, bitrate: 2395 kb/s
    Stream #0:0: Video: h264 (High 4:4:4 Predictive) (H264 / 0x34363248), yuv420
p, 128x64, 25 fps, 25 tbr, 25 tbn, 50 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16
, 1536 kb/s
File 'd2.wav' already exists. Overwrite ? [y/N] y
Output #0, wav, to 'd2.wav':
  Metadata:
    ISFT            : Lavf54.36.100
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16
, 1536 kb/s
Stream mapping:
  Stream #0:1 -> #0:0 (pcm_s16le -> pcm_s16le)
Press [q] to stop, [?] for help
size= 5699438kB time=08:26:37.00 bitrate=1536.0kbits/s
video:0kB audio:5699438kB subtitle:0 global headers:0kB muxing overhead 0.000001
%
</pre>


<pre>
D:\bug-export-wav>ffmpeg -analyzeduration 999999999 -i d2.wav
ffmpeg version N-46469-gc995644 Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov  5 2012 17:54:28 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runt
ime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass -
-enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enab
le-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libo
pus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheo
ra --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena
ble-zlib
  libavutil      52.  5.100 / 52.  5.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 21.106 /  3. 21.106
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, wav, from 'd2.wav':
  Metadata:
    encoder         : Lavf54.36.100
  Duration: 02:13:47.38, bitrate: 5816 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16
, 1536 kb/s
At least one output file must be specified
</pre>

That is "Duration: 02:13:47.38, bitrate: 5816 kb/s" instead of
"size= 5699438kB time=08:26:37.00 bitrate=1536.0kbits/s"


VirtualDub export correct wav ("aud.scenario.avs.avi.wav", approximately same size as "bad ffmpeg wav", but with correct length) without any problem.

<pre>
D:\bug-export-wav>ffmpeg -i aud.scenario.avs.avi.wav
ffmpeg version N-46469-gc995644 Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov  5 2012 17:54:28 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runt
ime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass -
-enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enab
le-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libo
pus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheo
ra --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena
ble-zlib
  libavutil      52.  5.100 / 52.  5.100
  libavcodec     54. 71.100 / 54. 71.100
  libavformat    54. 36.100 / 54. 36.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 21.106 /  3. 21.106
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[w64 @ 0036b400] max_analyze_duration 5000000 reached at 5013333
[w64 @ 0036b400] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, w64, from 'aud.scenario.avs.avi.wav':
  Duration: 08:26:37.00, bitrate: 1535 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16
, 1536 kb/s
At least one output file must be specified
</pre>


----

I have this problem with every tried version of ffmpeg since 2010 (arrozcru/zeranoe builds), tried a lot of options — no success.

Is this bug or know feature?
Are the any workaroud?


           Sincerely, Stas Fomin

P.S.
(Sample files are too great, 17GB, but I can share if this will be useful).