[FFmpeg-trac] #2094(undetermined:new): Forward seeking in svq3-in-mov impossible

FFmpeg trac at avcodec.org
Tue Jan 1 22:08:30 CET 2013


#2094: Forward seeking in svq3-in-mov impossible
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:  git-       |  undetermined
  master                             |               Keywords:  mov svq3
             Blocked By:             |  seek
Reproduced by developer:  0          |               Blocking:
                                     |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 Reported in ticket #296.
 Seeking forward by pressing "right" with ffplay (and mplayer -demuxer
 lavf) fails badly with attached sample. Seeking with the mouse works fine,
 seeking back also appears to work (at least with ffplay, mplayer -demuxer
 lavf always seeks back to the start of the file).
 {{{
 $ ffplay first_keyframe_only_confused.mov
 ffplay version N-48385-g5ed5e90 Copyright (c) 2003-2013 the FFmpeg
 developers
   built on Jan  1 2013 21:30:44 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 13.100 / 52. 13.100
   libavcodec     54. 85.100 / 54. 85.100
   libavformat    54. 59.100 / 54. 59.100
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 30.102 /  3. 30.102
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f16200008c0] max_analyze_duration 5000000
 reached at 5000000
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
 'first_keyframe_only_confused.mov':
   Metadata:
     creation_time   : 2002-05-28 16:40:20
     encoder         : Encoded with Cleaner 5
     encoder-eng     : Encoded with Cleaner 5
   Duration: 00:00:13.03, bitrate: 389 kb/s
     Stream #0:0(eng): Video: svq3 (SVQ3 / 0x33515653), yuvj420p, 320x240,
 388 kb/s, 30 fps, 30 tbr, 600 tbn, 600 tbc
     Metadata:
       creation_time   : 2002-05-28 16:40:20
       handler_name    : Apple Alias Data Handler
 Frame changed from size:0x0 to size:320x240
 first_keyframe_only_confused.mov: error while seeking    0B f=0/7   =
 0B f=0/0
    1.26 A-V:  0.000 fd=   1 aq=    0KB vq=    0KB sq=    0B f=0/11
 }}}
 I used the following patch to test but the problem is also reproducible
 with unpatched ffplay.
 {{{
 diff --git a/ffplay.c b/ffplay.c
 index 7d47bcd..9315543 100644
 --- a/ffplay.c
 +++ b/ffplay.c
 @@ -2991,10 +2991,10 @@ static void event_loop(VideoState *cur_stream)
                  incr = -600.0;
                  goto do_seek;
              case SDLK_LEFT:
 -                incr = -10.0;
 +                incr = -5.0;
                  goto do_seek;
              case SDLK_RIGHT:
 -                incr = 10.0;
 +                incr = 5.0;
                  goto do_seek;
              case SDLK_UP:
                  incr = 60.0;
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2094>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list