[FFmpeg-trac] #6212(undetermined:new): Memory leak on Ubuntu 16.04

[FFmpeg]

#6212: Memory leak on Ubuntu 16.04
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             Reporter:  alqemyst     |                     Type:  defect
               Status:  new          |                 Priority:  critical
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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 I'm trying to run ffmpeg on Ubuntu 16.04, libc6-dev 2.23-0ubuntu5 amd64.

 There is a memory leak that is according to my tests related to pthreads.
 If I fully transcode video and audio process can go up to 1GB of memory
 usage in an hour.

 Tested with following command:
 ffmpeg -loglevel error -i
 "udp://239.250.15.1:5004?fifo_size=1000000&overrun_nonfatal=1"
 -ignore_unknown -sn -c:v copy -c:a copy -f null -

 Valgrind with --leak-check=full --show-leak-kinds=all doesn't show too
 much in my opinion.

 When ffmpeg is compiled with --disable-pthreads memory is stable for
 hours.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6212>
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