[FFmpeg-trac] #1621(undetermined:new): Converted flash video has longer duration than the source

[FFmpeg]

#1621: Converted flash video has longer duration than the source
-------------------------------------+-------------------------------------
             Reporter:  agowad       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by agowad):

 COMMAND:

 {{{
 ffmpeg.exe -i "Dolphins_720.wmv" -ar 44100 "Dolphins_7202_TMP.flv"
 }}}

 You can change 44100 to lower value, then the difference is smaller.

 MEDIA FILES:
 *
 {{{
 ffmpeg.exe -i "Dolphins_720.wmv"
 }}}


 {{{
 ffmpeg version N-43206-gf857465 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Aug  4 2012 16:10:39 with gcc 4.7.1 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-
 frei0r --enable-libass
  --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb
 --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut
 --enable-libope
 njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex
 --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-
 libvo-amrwbenc --enable-
 libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
 libxvid --enable-zlib
   libavutil      51. 66.100 / 51. 66.100
   libavcodec     54. 49.100 / 54. 49.100
   libavformat    54. 22.100 / 54. 22.100
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3.  5.102 /  3.  5.102
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, asf, from 'Dolphins_720.wmv':
   Metadata:
     WMFSDKVersion   : 9.00.00.2980
     WMFSDKNeeded    : 0.0.0.0000
     IsVBR           : 0
   Duration: 00:01:46.02, start: 0.000000, bitrate: 6576 kb/s
     Stream #0:0(eng): Audio: wmapro (b[1][0][0] / 0x0162), 48000 Hz, 5.1,
 flt, 384 kb/s
     Stream #0:1(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p,
 1280x720, 6000 kb/s, 23.98 tbr, 1k tbn, 1k tbc
 At least one output file must be specified
 }}}

 *
 {{{
 ffmpeg.exe -i "Dolphins_7202_TMP.flv"
 }}}


 {{{
 ffmpeg version N-43206-gf857465 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Aug  4 2012 16:10:39 with gcc 4.7.1 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-
 frei0r --enable-libass
  --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb
 --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut
 --enable-libope
 njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex
 --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-
 libvo-amrwbenc --enable-
 libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
 libxvid --enable-zlib
   libavutil      51. 66.100 / 51. 66.100
   libavcodec     54. 49.100 / 54. 49.100
   libavformat    54. 22.100 / 54. 22.100
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3.  5.102 /  3.  5.102
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, flv, from 'Dolphins_7202_TMP.flv':
   Metadata:
     WMFSDKVersion   : 9.00.00.2980
     WMFSDKNeeded    : 0.0.0.0000
     IsVBR           : 0
     encoder         : Lavf54.22.100
   Duration: 00:01:47.24, start: 0.000000, bitrate: 1577 kb/s
     Stream #0:0: Video: flv1, yuv420p, 1280x720, 200 kb/s, 23.98 tbr, 1k
 tbn, 1k tbc
     Stream #0:1: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
 At least one output file must be specified
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1621#comment:2>
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