[FFmpeg-trac] #5182(undetermined:new): ffmpeg OOM with filters

[FFmpeg]

#5182: ffmpeg OOM with filters
-------------------------------------+-------------------------------------
               Reporter:  richardpl  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:  git-       |  undetermined
  master                             |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  1          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 Summary of the bug:

 FFmpeg caches all output frames instead of dumping them out immediately.

 How to reproduce:
 {{{
 % ffmpeg -f lavfi -i color=white -vf
 "zoompan=z='min(zoom+0.0015,1.5)':d=700000:x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)'"
 -c:v rawvideo -f null -
 ffmpeg version git-2016-01-23-aba45b0 Copyright (c) 2000-2016 the FFmpeg
 developers
 built with clang version 3.7.0 (tags/RELEASE_370/final)
 configuration: --extra-cflags=-I/usr/local/include --extra-
 ldflags=-L/usr/local/lib --cc=clang --as=clang --disable-ffserver
 --disable-ffplay --disable-indevs --disable-outdevs --enable-gpl --enable-
 indev=x11grab_xcb --enable-indev=lavfi --enable-indev=alsa --enable-
 nonfree --enable-openssl --enable-outdev=alsa --disable-shared --enable-
 static --enable-x11grab --enable-ladspa --enable-netcdf --enable-
 fontconfig --enable-libfreetype --samples=../fate-suite
 libavutil      55. 14.100 / 55. 14.100
 libavcodec     57. 22.100 / 57. 22.100
 libavformat    57. 22.100 / 57. 22.100
 libavdevice    57.  0.100 / 57.  0.100
 libavfilter     6. 27.100 /  6. 27.100
 libswscale      4.  0.100 /  4.  0.100
 libswresample   2.  0.101 /  2.  0.101
 libpostproc    54.  0.100 / 54.  0.100
 Input #0, lavfi, from 'color=white':
 Duration: N/A, start: 0.000000, bitrate: N/A
 Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR
 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Output #0, null, to 'pipe:':
 Metadata:
 encoder         : Lavf57.22.100
 Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1280x720 [SAR
 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
 Metadata:
 encoder         : Lavc57.22.100 rawvideo
 Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
 Press [q] to stop, [?] for help
 [swscaler @ 0x3458900] Warning: data is not aligned! This can lead to a
 speedloss
 [output stream 0:0 @ 0x3453540] 100 buffers queued in output stream 0:0,
 something may be wrong.
 [output stream 0:0 @ 0x3453540] 1000 buffers queued in output stream 0:0,
 something may be wrong.
 [output stream 0:0 @ 0x3453540] 10000 buffers queued in output stream 0:0,
 something may be wrong.
 ^C^C^CReceived > 3 system signals, hard exiting
 }}}

 Same can happen with fps filter and vfr input when there is big time gap
 between input frames.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5182>
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