[FFmpeg-trac] #501(FFmpeg:new): Extract thumbnails with -ss from WMV big

[FFmpeg]

#501: Extract thumbnails with -ss from WMV big
-------------------------------------+-------------------------------------
               Reporter:             |                  Owner:  michael
  plaguebreath                       |                 Status:  new
                   Type:  defect     |              Component:  FFmpeg
               Priority:  normal     |               Keywords:  APPCRASH
                Version:             |  c0000005
  unspecified                        |               Blocking:
             Blocked By:             |  Analyzed by developer:  0
Reproduced by developer:  0          |
-------------------------------------+-------------------------------------
 I have 3 WMV files bigger then 3 hours each, I have to extract 6 frames
 from each at fix time, so I have to make a loop with that command:

 {{{
 ffmpeg -ss 2788 -i "1.wmv" -an -sameq -v 9 -loglevel 99 -vframes 1 -y
 "1_.jpg"
 }}}

 After few minutes of DROP LINE like


 {{{
 20:40:19 - frame= 0 fps= 0 q=0.0 size= 0kB time=00:00:00.00 bitrate=
 0.0kbits/s dup=0 drop=2019
 20:40:19 - frame= 0 fps= 0 q=0.0 size= 0kB time=00:00:00.00 bitrate=
 0.0kbits/s dup=0 drop=2141
 }}}

 ffmpeg crash with APPCRASH C0000005 error.

 I tried a very old version I still had on hd FFmpeg version SVN-r26400
 that one work and differ from the newer from the fact that it output
 something like that:


 {{{
 20:59:54 - frame=    0 fps=  0 q=0.0 size=       0kB time=10000000000.00
 bitrate=   0.0kbits/s dup=0 drop=26043
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 793 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1194 DC, 1194 AC, 1194 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 498 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1195 DC, 1195 AC, 1195 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 746 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1198 DC, 1198 AC, 1198 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 884 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1193 DC, 1193 AC, 1193 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 793 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1194 DC, 1194 AC, 1194 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 498 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1195 DC, 1195 AC, 1195 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 746 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1198 DC, 1198 AC, 1198 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 884 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1193 DC, 1193 AC, 1193 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 793 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1194 DC, 1194 AC, 1194 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 498 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1195 DC, 1195 AC, 1195 MV errors
 20:59:54 - [wmv3 @ 03030160] Bits overconsumption: 746 > 496
 20:59:54 - [wmv3 @ 03030160] concealing 1198 DC, 1198 AC, 1198 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 884 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1193 DC, 1193 AC, 1193 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 793 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1194 DC, 1194 AC, 1194 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 498 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1195 DC, 1195 AC, 1195 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 746 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1198 DC, 1198 AC, 1198 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 884 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1193 DC, 1193 AC, 1193 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 793 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1194 DC, 1194 AC, 1194 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 498 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1195 DC, 1195 AC, 1195 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 746 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1198 DC, 1198 AC, 1198 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 884 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1193 DC, 1193 AC, 1193 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 793 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1194 DC, 1194 AC, 1194 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 498 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1195 DC, 1195 AC, 1195 MV errors
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 746 > 496
 20:59:55 - [wmv3 @ 03030160] concealing 1198 DC, 1198 AC, 1198 MV errors
 20:59:55 - frame=    0 fps=  0 q=0.0 size=       0kB time=10000000000.00
 bitrate=   0.0kbits/s dup=0 drop=26079
 20:59:55 - [wmv3 @ 03030160] Bits overconsumption: 884 > 496
 }}}

 but not crash even if it is bitter slower then others. What's the issue
 about the drop and crash ? Attach the log untill crash.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/501>
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