[FFmpeg-trac] #10550(avfilter:new): complex_filtergraph (trim, concat) memory leak

[FFmpeg]

#10550: complex_filtergraph (trim, concat) memory leak
-------------------------------------+-------------------------------------
             Reporter:  Kurt         |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  avfilter     |                  Version:  git-
             Keywords:               |  master
  filter_complex trim memleak        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 ffmpeg runs out of memory quickly when fed a complex_filtergraph with
 several trim and concat commands.

 More precisely:
 * The filtergraph looks like: [0:video]trim=start=st1:end=en1,setpts=PTS-
 STARTPTS[v1];[0:video]trim=start=st2:end=en2,setpts=PTS=STARTPTS[v2];[v1][v2]concat[vout]
 to create a video from several pieces.
 ffmpeg runs fine before st1 and still until en1. After en1, it starts
 leaking memory at an amazing rate until it runs OOM.

 How to reproduce:
 {{{
 % ffmpeg -i input.ts -filter_complex "[0:2]trim=start=200:end=220,setpts
 =PTS-STARTPTS[v1];[0:2]trim=start=400:end=440,setpts=PTS-
 STARTPTS[v2];[v1][v2]concat[v3];[0:2]trim=start=1440:end=1500,setpts=PTS-
 STARTPTS[v4];[v3][v4]concat[vout]" -map [vout]  -c:v libx264 output.mkv
 }}}

 ffmpeg version N-111899-g4489615e8f Copyright (c) 2000-2023 the FFmpeg
 developers
   built with gcc 12.3.1 (GCC) 20230702
   configuration: --enable-gpl --enable-gnutls --enable-libass --enable-
 libbluray --enable-libcdio --enable-libdav1d --enable-libopus --enable-
 libpulse --enable-libmp3lame --enable-librav1e --enable-librtmp --enable-
 libspeex --enable-libtwolame --enable-libvmaf --enable-libvorbis --enable-
 libvpx --enable-libx264 --enable-libx265 --enable-opengl --enable-libdrm
 --enable-libsvtav1 --enable-libzvbi --enable-libfontconfig --enable-
 libfreetype --enable-libfribidi --enable-shared --libdir=/usr/local/lib64
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10550>
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