Opened 3 years ago

Closed 3 years ago

#2692 closed defect (duplicate)

can't seek in swf

Reported by: hxuanyu Owned by:
Priority: normal Component: avformat
Version: unspecified Keywords: swf
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no


I'm building a video player using ffmpeg, when seek to the beginning of a swf file(av_seek_frame to 0), ffmpeg throws lots of FFMPEG: Unknown tag,

and subsequent call of av_read_frame returns false.

the version I use is ffmpeg 1.1.3

and this can be reproduced with ffplay

$ gdb ffplay
GNU gdb (GDB) (cygwin-special)
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-cygwin".
For bug reporting instructions, please see:
Reading symbols from /cygdrive/c/Users/Alex/Downloads/ffmpeg-latest-win32-static/ffmpeg-20130217-git-b8bb661-win32-static/bin/ffplay...(no debugging symbols found)...done.
(gdb) r -ss 0 c:/20051210.swf
Starting program: /cygdrive/c/Users/Alex/Downloads/ffmpeg-latest-win32-static/ffmpeg-20130217-git-b8bb661-win32-static/bin/ffplay -ss 0 c:/20051210.swf
[New Thread 8364.0x27f0]
[New Thread 8364.0x2748]
[New Thread 8364.0x172c]
[New Thread 8364.0x2520]
[New Thread 8364.0x2780]A-V: 0.000 fd= 0 aq= 0KB vq= 0KB sq= 0B f=0/0
[New Thread 8364.0x15c4]
[New Thread 8364.0x23c8]
[New Thread 8364.0x1698]
[New Thread 8364.0x2078]
[New Thread 8364.0x20c4]
[New Thread 8364.0x1c14]
[New Thread 8364.0x1b74]

1.75 A-V: 0.000 fd= 0 aq= 0KB vq= 0KB sq= 0B f=0/0

there's no video playback window pops up

Attachments (1)

20051210.swf (810.2 KB) - added by hxuanyu 3 years ago.

Download all attachments as: .zip

Change History (2)

Changed 3 years ago by hxuanyu

comment:1 Changed 3 years ago by cehoyos

  • Component changed from undetermined to avformat
  • Keywords swf added
  • Resolution set to duplicate
  • Status changed from new to closed

Related to ticket #2496.

For future tickets: Please always test current git head and please only provide ffplay output if a problem is not reproducible with ffmpeg (the application).

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