https://www.datafilehost.com/d/2011e77c
C:\>ffmpeg -i alac_20bit.m4a
ffmpeg version N-79753-g3395ad4 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. 23.100 / 55. 23.100
libavcodec 57. 38.100 / 57. 38.100
libavformat 57. 36.100 / 57. 36.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 44.100 / 6. 44.100
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[alac @ 0x28ad860] Sample depth 20 is not implemented. Update your FFmpeg versio
n to the newest one from Git. If the problem still occurs, it means that your fi
le has a feature which has not been implemented.
[alac @ 0x28ad860] If you want to help, upload a sample of this file to ftp://up
load.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-dev
el@ffmpeg.org)
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x28a4020] Failed to open codec in av_find_stream_inf
o
[alac @ 0x28ad860] Sample depth 20 is not implemented. Update your FFmpeg versio
n to the newest one from Git. If the problem still occurs, it means that your fi
le has a feature which has not been implemented.
[alac @ 0x28ad860] If you want to help, upload a sample of this file to ftp://up
load.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-dev
el@ffmpeg.org)
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'alac_20bit.m4a':
Metadata:
major_brand : M4A
minor_version : 0
compatible_brands: M4A mp42isom
creation_time : 2016-05-03 14:35:50
encoder : refalac 1.58, Apple Lossless Encoder
Duration: 00:00:20.00, start: 0.000000, bitrate: 1554 kb/s
Stream #0:0(und): Audio: alac (alac / 0x63616C61), 44100 Hz, 2 channels, 155
3 kb/s (default)
Metadata:
creation_time : 2016-05-03 14:35:50
At least one output file must be specified
Do you have 32 bit samples?