Files ffmpeg cannot convert

[Johann]

I run an online audio converter that uses ffmpeg, among other tools, to convert audio files.

I have collected a number of files that ffmpeg couldn't convert and I hope you can use them to improve ffmpeg.

I tried to use

% ffmpeg -y -i file.ext -acodec pcm_s16le -ac 2 fnuh.wav

to convert these files.

The ffmpeg version in use is

$ ffmpeg
ffmpeg version 0.10.5-6:0.10.5-0ubuntu0jon1 Copyright (c) 2000-2012 the FFmpeg developers
  built on Oct  1 2012 01:56:55 with gcc 4.6.3
  configuration: --arch=amd64 --enable-pthreads --enable-runtime-cpudetect --extra-version='6:0.10.5-0ubuntu0jon1' --libdir=/usr/lib/x86_64-linux-gnu --disable-stripping --prefix=/usr --enable-bzlib --enable-libdc1394 --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-libcdio --enable-x11grab --enable-libx264 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
  libavutil      51. 35.100 / 51. 35.100
  libavcodec     53. 61.100 / 53. 61.100
  libavformat    53. 32.100 / 53. 32.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 61.100 /  2. 61.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  6.100 /  0.  6.100
  libpostproc    52.  0.100 / 52.  0.100

Download the files at ​https://docs.google.com/open?id=0B_2v4lMxiJ1ARnptY1hmVjBpWlk

[Elon Musk]

All 3ga files are invalid - they are missing moov atom. Is there program which can actually decode them?

For one file we have already bug report (non 4-bit ADPCM IMA wav)
And second file is wav with audio tag 0xA100.

[Johann]

Hello,

thanks for looking into the files.

As for the 3ga files -- do you have any ideas where they could come from? Users upload anything and everything and maybe there's some half-broken cellphone out there that records these?

BTW: file says ISO Media, MPEG v4 system, 3GPP to all the 3ga files.

The wav file with the 0xa100 is using Comverse Infosys Ltd. G723 1, according to ​this.

Is there a list of TwoCC codecs ffmpeg supports?

Thanks,

Johann

[Elon Musk]

0xa100 is now supported: ​http://git.videolan.org/?p=ffmpeg.git;a=commit;h=2ef26b5e73373d0684a3507f74adfbf3a1e22785

TwoCC list: ​http://ffmpeg.org/doxygen/trunk/riff_8c-source.html#l00327

[Johann]

Thanks, do you plan to merge this change in the 0.10 branch so it would be available on Ubuntu 12.04?

Also, I was trying to play the 3ga files on my Android tablet but it wouldn't play it.

[Carl Eugen Hoyos]

The problem with adpcm_ima_wav is a duplicate of ticket #1856.

Enhancements are usually not backported, could you send a patch (or setup a git clone) if you need it?