[FFmpeg-trac] #7146(undetermined:new): heavy memory leak when reading video from a DV/firewire camera (via iec61883)

[FFmpeg]

#7146: heavy memory leak when reading video from a DV/firewire camera (via
iec61883)
-------------------------------------+-------------------------------------
             Reporter:  bugtrack     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 When reading from a DV/firewire camera (via iec61883),
 ffmpeg leaks memory equivalent to the total amount of data acquired from
 the input.
 This causes ffmpeg's memory usage to diverge at a rate of approx. 28
 Mbit/s.

 How to reproduce:
 {{{
 % ffmpeg -y -f iec61883 -i 0 -f null /dev/null
 }}}
 The memory allocated by ffmpeg steadily increases at the rate of the DV
 data coming in.

 For other inputs, like a USB webcam,
 {{{
 % ffmpeg -y -f video4linux2 -i /dev/video0 -f null /dev/null
 }}}
 memory usage does not diverge.

 Valgrind shows, that the memory actually leaks:
 {{{
 valgrind --leak-check=full ffmpeg -y -v 9 -loglevel 99 -f iec61883 -i 0 -t
 30 -f null /dev/null > verbose_valgrind_output 2>&1
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7146>
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