[FFmpeg-trac] #1868(undetermined:new): qdm2: 8bps mode decodes with audiable distortions
FFmpeg
trac at avcodec.org
Mon Oct 29 22:09:30 CET 2012
#1868: qdm2: 8bps mode decodes with audiable distortions
-------------------------------------+-------------------------------------
Reporter: ami_stuff | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: | undetermined
unspecified | Keywords:
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
-------------------------------------+-------------------------------------
similar problem can be reproduced with file from ticket #742
{{{
C:\>ffmpeg -i 44kHz_8kbps.aif out.wav
ffmpeg version N-45867-g3318d6b Copyright (c) 2000-2012 the FFmpeg
developers
built on Oct 23 2012 02:39:33 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-w32threads --enable-memalign-hack --enable-runtime-
cpudetect
--enable-cross-compile --enable-static --disable-shared --extra-
libs='-lws2_32 -
lwinmm -lpthread' --extra-cflags='--static
-I/var/www/users/research/ffmpeg/snap
shots/build/include' --extra-ldflags='-static
-L/var/www/users/research/ffmpeg/s
napshots/build/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-
version3
--enable-nonfree --enable-libx264 --enable-libspeex --enable-libtheora
--enable-
libvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb
--enable-
libopencore-amrwb --enable-libmp3lame --enable-libvpx --disable-
decoder=libvpx
libavutil 51. 77.100 / 51. 77.100
libavcodec 54. 68.100 / 54. 68.100
libavformat 54. 33.100 / 54. 33.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 20.104 / 3. 20.104
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, aiff, from '44kHz_8kbps.aif':
Duration: 00:00:00.00, start: 0.000000, bitrate: 33509 kb/s
Stream #0:0: Audio: qdm2 (QDM2 / 0x324D4451), 44100 Hz, mono, s16, 8
kb/s
Output #0, wav, to 'out.wav':
Metadata:
ISFT : Lavf54.33.100
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono,
s16,
705 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (qdm2 -> pcm_s16le)
Press [q] to stop, [?] for help
size= 400kB time=00:00:00.09 bitrate=34869.7kbits/s
video:0kB audio:400kB subtitle:0 global headers:0kB muxing overhead
0.019531%
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1868>
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