invalid result transcoding WAV file

[marius63]

On Windows 7, using the latest FFmpeg binaries (version N-61143-g64e4bd7), the result Y.wav of the following command is invalid.

ffmpeg -i X.wav -f f32le -ar 22050 Y.wav

The input X.wav is a valid WAV file, mono, sample format f32le, rate 44100Hz.

The objective was to convert the sample rate from 44100 to 22050.

The result Y.wav is invalid.

Windows Media Player reports invalid format (and does not play).

FFmpeg itself reports invalid data:

ffmpeg -i Y.wav
ffmpeg version N-61143-g64e4bd7 Copyright (c) 2000-2014 the FFmpeg developers

built on Mar 7 2014 00:06:56 with gcc 4.8.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av

isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
ack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable
-zlib

libavutil 52. 66.101 / 52. 66.101
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.101 / 55. 33.101
libavdevice 55. 11.100 / 55. 11.100
libavfilter 4. 3.100 / 4. 3.100
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100

Y.wav: Invalid data found when processing input

Regards.

[Carl Eugen Hoyos]

Replying to marius63:

ffmpeg -i X.wav -f f32le -ar 22050 Y.wav

This command forces ffmpeg to output a raw pcm file (format f32le) which cannot be auto-detected, not a wav file. If you want 32bit audio in your wav file, use -acodec pcm_s32le -f wav

Please understand that this is a bug tracker, not a support forum.