[FFmpeg-trac] #1250(undetermined:new): shorten: block size

[FFmpeg]

#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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