[FFmpeg-trac] #1911(undetermined:closed): ffplay fails to seek

FFmpeg trac at avcodec.org
Sat Jan 7 18:05:31 EET 2017


#1911: ffplay fails to seek
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  seek         |               Resolution:
  regression                         |  needs_more_info
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:  seek => seek regression


Comment:

 For the attached sample, I can reproduce a regression since
 3166a6fc379789b3782f431dd232033c2069c443:
 Seeking 10 seconds forwards and backwards a few times (making sure that
 backwards seeking always ends at about 2 seconds) suddenly seeks to 24
 seconds (instead of the usual 12), this can be reproduced another time.
 The behaviour cannot be seen with older versions. The same behaviour can
 be seen when changing "left" and "right" to +5 and +5 seconds: Instead of
 seeking to around 8 seconds (after seeking back to 2 or 3), forward
 seeking again ends at 24 seconds.
 {{{
 $ ffplay xvid2.avi
 ffplay version N-83022-g0006384 Copyright (c) 2003-2017 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      55. 43.100 / 55. 43.100
   libavcodec     57. 71.100 / 57. 71.100
   libavformat    57. 62.100 / 57. 62.100
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 68.100 /  6. 68.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, avi, from 'xvid2.avi':   0KB vq=    0KB sq=    0B f=0/0
   Duration: 00:00:25.28, start: 0.000000, bitrate: 255 kb/s
     Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID /
 0x44495658), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 248 kb/s, 23.97 fps,
 23.97 tbr, 23.97 tbn, 23.97 tbc
 [mpeg4 @ 0x7f990c013220] Video uses a non-standard and wasteful way to
 store B-frames ('packed B-frames'). Consider using the
 mpeg4_unpack_bframes bitstream filter without encoding but stream copy to
 fix it.
   25.06 M-V:  0.000 fd= 781 aq=    0KB vq=    0KB sq=    0B f=0/0
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/1911#comment:5>
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