[FFmpeg-trac] #1251(undetermined:new): AVSEEK_FLAG_ANY fails with attached file

FFmpeg trac at avcodec.org
Wed Apr 25 16:38:49 CEST 2012

#1251: AVSEEK_FLAG_ANY fails with attached file
             Reporter:  DonMoir      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 I have a normal seek which seeks to a timestamp (not using
 AVSEEK_FLAG_ANY) and does some additional checking and works for all files

 I specialize a seek back to the start of the file as this should not
 require as much checking. In this case I use AVSEEK_FLAG_ANY as it's
 essentially a 'don't care' and just get me back to the start of the file.

 This has always worked, but using AVSEEK_FLAG_ANY fails to seek with the
 attached avseek_flag_any_fails.mp4 file. The return value from
 avformat_seek_file is zero but really it hasn't done anything.

 The other files I have including all other mp4 files work fine. If I don't
 use AVSEEK_FLAG_ANY then I have to deal with files that may not have a
 first keyframe and the seek will fail on those files.

 Because of this file I am back to doing extra checking to make sure I can
 seek back to start but should not have to.

 Can't point you to a failing case with any of the common tools because I
 don't think any of them use AVSEEK_FLAG_ANY.

 Here's the stats on my build:

 C:\ffmpeg-dev\bin>ffplay avseek_flag_any_fails.mp4
 ffplay version N-40092-g3bbf3f7 Copyright (c) 2003-2012 the FFmpeg
   built on Apr 24 2012 00:57:29 with gcc 4.6.3
   configuration: --disable-static --enable-shared --enable-gpl --enable-
  --disable-w32threads --enable-runtime-cpudetect --enable-avisynth
  --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt
  --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
  --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg
  --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-
  --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc
  --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs
  --enable-libxvid --enable-zlib
   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. 72.100 /  2. 72.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 11.100 /  0. 11.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'avseek_flag_any_fails.mp4':
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     creation_time   : 2009-05-31 17:58:11
     encoder         : Lavf54.3.100
   Duration: 00:00:02.73, start: 0.000000, bitrate: 463 kb/s
     Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
     457 kb/s, 30 fps, 30 tbr, 30 tbn, 60 tbc
       creation_time   : 2009-05-31 17:58:11
       handler_name    : VideoHandler
    5.89 A-V:  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   0/0

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1251>
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