[FFmpeg-trac] #1876(avcodec:closed): vc1dec.c multi-threading decode crash issue

FFmpeg trac at avcodec.org
Mon Mar 10 00:17:46 CET 2014

#1876: vc1dec.c multi-threading decode crash issue
             Reporter:  DonMoir      |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  important    |                Component:  avcodec
              Version:  unspecified  |               Resolution:  fixed
             Keywords:  vc1 crash    |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  1            |

Comment (by DonMoir):

 By the way, I already mentioned this above, but in this case, neither
 command line applied and a back trace was useless. Command line tools were
 not capable of reproducing it because of their single file instance
 nature. Back trace was useless because it could crash anywhere in totally
 unrelated ffmpeg code or in my own code. It varied every time and it was

 While it was hard to reproduce, it would happen every now and then with
 normal application usage. I ended up having to automate it so I could get
 it to happen at will. I wrote some code that would open up many instances
 of an offending file at the same time and just kept beating on it.

Ticket URL: <https://trac.ffmpeg.org/ticket/1876#comment:37>
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