[FFmpeg-trac] #4755(undetermined:new): Output file longer than source

[FFmpeg]

#4755: Output file longer than source
-------------------------------------+-------------------------------------
             Reporter:  Abu          |                     Type:  defect
  Abdullah                           |                 Priority:  normal
               Status:  new          |                  Version:
            Component:               |  unspecified
  undetermined                       |               Blocked By:
             Keywords:               |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 mp3 created from rm file is longer than the original.
 How to reproduce:
 {{{
 % ffmpeg -i 001.rm -b:a 16k 001.mp3
 ffmpeg version N-73648-g90dd6ad Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.9.2 (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-libbs2b --enable-
 libcaca --
 enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm
 --enable-l
 ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
 --enab
 le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
 librtmp --en
 able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
 --ena
 ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-
 amrwbenc
  --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
 --enabl
 e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma
 --ena
 ble-decklink --enable-zlib
   libavutil      54. 28.100 / 54. 28.100
   libavcodec     56. 48.100 / 56. 48.100
   libavformat    56. 40.100 / 56. 40.100
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 21.100 /  5. 21.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.100 /  1.  2.100
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, rm, from '001.rm':
   Metadata:
     title           : ╟ط╘╤و╪ ╟ط├µط
     author          : ╟ط╘و╬ ع═ع╧ غ╟╒╤ ╟ط╧وغ ╟ط├ط╚╟غو
     copyright       : www.islamway.com
     comment         : ╟ط╟═╧╟╦ ▌و ╟ط╧وغ µ╟ط╚╧┌╔ - µ╟ط╙غ╔ µ╟╩╚╟┌ ╙غ╔ ╟ط╤╙µط
 µف╧ه ╟
 ط╙ط▌ ة ═▀ع ط╚╙ ╟ط╬ع╟╤ ▌و ╟طµ▐╩ ╟ط═╟طو ة µ═▀ع ╩█╪و╔ ╟طµ╠ف µ╟ط▀▌وغ ة ═▀ع ط╚╙
 ╟ط┼و╘
 ╤╚ ة ط╚╙ ╟ط▀┌╚ ╟ط┌╟طو ة فط و╠µ╥ ╙╚ ╟ط▀╟▌╤ ة ╘╤═ ط╟ وع╙ف ┼ط╟ ╟طع╪ف╤µغ ة
 µ═▀ع ╟╬╨
 ╟طع╒═▌ ط╚ط╟╧ ╟ط▀▌╤ ة ═▀ع غ╩▌ ╟ط═╟╠╚و
   Duration: 01:02:27.01, start: 0.000000, bitrate: 16 kb/s
     Stream #0:0: Audio: sipr (sipr / 0x72706973), 16000 Hz, mono, flt, 16
 kb/s
 Output #0, mp3, to '001.mp3':
   Metadata:
     TIT2            : ╟ط╘╤و╪ ╟ط├µط
     author          : ╟ط╘و╬ ع═ع╧ غ╟╒╤ ╟ط╧وغ ╟ط├ط╚╟غو
     TCOP            : www.islamway.com
     comment         : ╟ط╟═╧╟╦ ▌و ╟ط╧وغ µ╟ط╚╧┌╔ - µ╟ط╙غ╔ µ╟╩╚╟┌ ╙غ╔ ╟ط╤╙µط
 µف╧ه ╟
 ط╙ط▌ ة ═▀ع ط╚╙ ╟ط╬ع╟╤ ▌و ╟طµ▐╩ ╟ط═╟طو ة µ═▀ع ╩█╪و╔ ╟طµ╠ف µ╟ط▀▌وغ ة ═▀ع ط╚╙
 ╟ط┼و╘
 ╤╚ ة ط╚╙ ╟ط▀┌╚ ╟ط┌╟طو ة فط و╠µ╥ ╙╚ ╟ط▀╟▌╤ ة ╘╤═ ط╟ وع╙ف ┼ط╟ ╟طع╪ف╤µغ ة
 µ═▀ع ╟╬╨
 ╟طع╒═▌ ط╚ط╟╧ ╟ط▀▌╤ ة ═▀ع غ╩▌ ╟ط═╟╠╚و
     TSSE            : Lavf56.40.100
     Stream #0:0: Audio: mp3 (libmp3lame), 16000 Hz, mono, fltp, 16 kb/s
     Metadata:
       encoder         : Lavc56.48.100 libmp3lame
 Stream mapping:
   Stream #0:0 -> #0:0 (sipr (native) -> mp3 (libmp3lame))
 Press [q] to stop, [?] for help
 001.rm: Input/output error:53.46 bitrate=  16.0kbits/s
 size=    7336kB time=01:02:27.00 bitrate=  16.0kbits/s
 video:0kB audio:7335kB subtitle:0kB other streams:0kB global headers:0kB
 muxing
 overhead: 0.007988%
 }}}
 the output file shows duration of
 {{{
 % ffmpeg.exe-i 001.mp3
 ffmpeg version N-73648-g90dd6ad Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.9.2 (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-libbs2b --enable-
 libcaca --
 enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm
 --enable-l
 ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
 --enab
 le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
 librtmp --en
 able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
 --ena
 ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-
 amrwbenc
  --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
 --enabl
 e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma
 --ena
 ble-decklink --enable-zlib
   libavutil      54. 28.100 / 54. 28.100
   libavcodec     56. 48.100 / 56. 48.100
   libavformat    56. 40.100 / 56. 40.100
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 21.100 /  5. 21.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.100 /  1.  2.100
   libpostproc    53.  3.100 / 53.  3.100
 [mp3 @ 0437c920] Skipping 0 bytes of junk at 600.
 Input #0, mp3, from '001.mp3':
   Metadata:
     title           : ╟ط╘╤و╪ ╟ط├µط
     author          : ╟ط╘و╬ ع═ع╧ غ╟╒╤ ╟ط╧وغ ╟ط├ط╚╟غو
     copyright       : www.islamway.com
     comment         : ╟ط╟═╧╟╦ ▌و ╟ط╧وغ µ╟ط╚╧┌╔ - µ╟ط╙غ╔ µ╟╩╚╟┌ ╙غ╔ ╟ط╤╙µط
 µف╧ه ╟
 ط╙ط▌ ة ═▀ع ط╚╙ ╟ط╬ع╟╤ ▌و ╟طµ▐╩ ╟ط═╟طو ة µ═▀ع ╩█╪و╔ ╟طµ╠ف µ╟ط▀▌وغ ة ═▀ع ط╚╙
 ╟ط┼و╘
 ╤╚ ة ط╚╙ ╟ط▀┌╚ ╟ط┌╟طو ة فط و╠µ╥ ╙╚ ╟ط▀╟▌╤ ة ╘╤═ ط╟ وع╙ف ┼ط╟ ╟طع╪ف╤µغ ة
 µ═▀ع ╟╬╨
 ╟طع╒═▌ ط╚ط╟╧ ╟ط▀▌╤ ة ═▀ع غ╩▌ ╟ط═╟╠╚و
     encoder         : Lavf56.40.100
   Duration: 01:02:35.59, start: 0.069063, bitrate: 16 kb/s
     Stream #0:0: Audio: mp3, 16000 Hz, mono, s16p, 16 kb/s
 At least one output file must be specified
 }}}
 original: 01:02:27.01
 output: 01:02:35.59

 files are at:
 http://maknoon.com/audios.mp3/alalbani/alnoor/001.mp3
 http://maknoon.com/audios.mp3/alalbani/alnoor/001.rm

 this is affecting seek since i got two different points in the file.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4755>
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