Opened 5 months ago

Closed 5 months ago

#6520 closed defect (fixed)

MP4 muxer has continuously increasing memory usage

Reported by: Sesse Owned by:
Priority: normal Component: avformat
Version: 3.2.4 Keywords:
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Hi,

I'm muxing MP4 streams with -movflags empty_moov+frag_keyframe+default_base_moof -frag_duration 125000. It seems that memory usage is very slowly but surely increasing, by roughly 15 MB/day until I close the stream.

tcmalloc heap profiling seems to indicate that the culprit is the mov muxer. In particular, mov_add_tfra_entries() allocates a MOVFragmentInfo struct for each fragment, and never seems to clear them; 36 bytes every 125 ms is 25 MB/day, so it matches pretty well.

Is there a way to avoid this allocation? Given that this is a stream and not a file, I don't see how one needs to know about every fragment that has ever been output.

Change History (1)

comment:1 Changed 5 months ago by Sesse

  • Resolution set to fixed
  • Status changed from new to closed

According to wbs, fixed in 3.3 (which is unfortunately too new for me) if you add +skip_trailer to movflags.

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