Multi-threaded FFMPEG accesses crash (Bugfix #1369)

hello, can you provide a sample code that reproduces the problem?

don't have a publishable code right now (i'll try to provide one by week's end)
basically having 2 or more threads doing :
lock shared video reader mutex
read video file
unlock mutex

process

lock shared video writer mutex
write video file
unlock mutex

threads access different video files (no conflict on same file) and share video reader and writer mutex

this is done in an almost infinite loop and crash can happen after 10 to thousands of iteration where a new thread is created to replace one that has finished

If no mutexes used crash happens much faster
With mutexes crash happens randomly
with same mutex for read AND write => no crash

So currently the workaround is sharing one mutex over all threads but this is a very restrictive bottleneck

since it's easy to insert synchronization calls into user's code, I lower priority of the bug

Have you ever beein tring av_lockmgr_register()?
It is ffmpeg's lock mechanism().

Is it possible to include this in the final 2.4.3 release?