[FFmpeg-trac] #1250(undetermined:new): shorten: block size
FFmpeg
trac at avcodec.org
Wed Apr 25 15:44:22 CEST 2012
#1250: shorten: block size
-------------------------------------+-------------------------------------
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
-------------------------------------+-------------------------------------
currectly ffmpeg is able to decode correctly files with block sizes like
128, 256, but not 512, 1024...
older version of ffmpeg happened to decode correctly 512, but failed as
well with 1024 because of overread
{{{
C:\>ffmpeg -i 512.shn out.wav
ffmpeg version N-40040-gc047afb Copyright (c) 2000-2012 the FFmpeg
developers
built on Apr 22 2012 02:36:31 with gcc 4.5.0 20100414 (Fedora MinGW
4.5.0-1.fc
14)
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' --extra-cflags='--static
-I/var/www/users/research/ffmpeg/snapshots/buil
d/include' --extra-ldflags='-static
-L/var/www/users/research/ffmpeg/snapshots/b
uild/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-version3
--enable-n
onfree --enable-libx264 --enable-libspeex --enable-libtheora --enable-
libvorbis
--enable-libfaac --enable-libxvid --enable-libopencore-amrnb --enable-
libopencor
e-amrwb --enable-libmp3lame --enable-libvpx --disable-decoder=libvpx
libavutil 51. 47.100 / 51. 47.100
libavcodec 54. 15.100 / 54. 15.100
libavformat 54. 3.100 / 54. 3.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 71.102 / 2. 71.102
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 11.100 / 0. 11.100
libpostproc 52. 0.100 / 52. 0.100
[shorten @ 0x1db2320] 2 header bytes unparsed
Input #0, shn, from '512.shn':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Audio: shorten, 44100 Hz, 2 channels, s16
Guessed Channel Layout for Input Stream #0.0 : stereo
Output #0, wav, to 'out.wav':
Metadata:
encoder : Lavf54.3.100
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16
, 1411 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (shorten -> pcm_s16le)
Press [q] to stop, [?] for help
[shorten @ 0x1db2320] 2 header bytes unparsed
Multiple frames in a packet from stream 0
[shorten @ 0x1db2320] overread: 1
Error while decoding stream #0:0
[shorten @ 0x1db2320] unknown shorten function 26
[shorten @ 0x1db2320] unknown shorten function 15
[shorten @ 0x1db2320] overread: 1
Error while decoding stream #0:0
[shorten @ 0x1db2320] unknown shorten function 17
[shorten @ 0x1db2320] overread: 1
Error while decoding stream #0:0
[shorten @ 0x1db2320] overread: 1
Error while decoding stream #0:0
[shorten @ 0x1db2320] overread: 1
Error while decoding stream #0:0
[shorten @ 0x1db2320] overread: 1
Error while decoding stream #0:0
[shorten @ 0x1db2320] overread: 1
Error while decoding stream #0:0
size= 48kB time=00:00:00.27 bitrate=1412.6kbits/s
video:0kB audio:48kB global headers:0kB muxing overhead 0.093450%
}}}
{{{
C:\>ffmpeg -i 512.shn out.wav
ffmpeg version N-32355-g4f7dfe1, Copyright (c) 2000-2011 the FFmpeg
developers
built on Sep 6 2011 13:06:48 with gcc 4.6.1
configuration: --enable-gpl --enable-version3 --enable-memalign-hack
--enable-
runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r
--enable-libo
pencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-
libgsm --
enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-
libschroedinger
--enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx
--enabl
e-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 11. 0 / 53. 11. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 39. 0 / 2. 39. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[shn @ 01EB8C60] parser not found for codec shorten, packets or times may
be inv
alid.
[shorten @ 01EB2320] 2 header bytes unparsed
[shn @ 01EB8C60] max_analyze_duration 5000000 reached at 5005400
[shn @ 01EB8C60] Estimating duration from bitrate, this may be inaccurate
Input #0, shn, from '512.shn':
Duration: 00:00:06.81, start: 0.000000, bitrate: 1411 kb/s
Stream #0.0: Audio: shorten, 44100 Hz, 2 channels, s16, 1411 kb/s
Output #0, wav, to 'out.wav':
Metadata:
encoder : Lavf53.11.0
Stream #0.0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2
channels,
s16, 1411 kb/s
Stream mapping:
Stream #0.0 -> #0.0 (shorten -> pcm_s16le)
Press [q] to stop, [?] for help
[shorten @ 01EB2320] 2 header bytes unparsed
Multiple frames in a packet from stream 0
size= 1724kB time=00:00:10.00 bitrate=1411.2kbits/s
video:0kB audio:1724kB global headers:0kB muxing overhead 0.002492%
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1250>
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