[FFmpeg-trac] #9679(avfilter:new): Memory leak in zscale

[FFmpeg]

#9679: Memory leak in zscale
-----------------------------------+---------------------------------------
             Reporter:  Anton1699  |                     Type:  defect
               Status:  new        |                 Priority:  normal
            Component:  avfilter   |                  Version:  unspecified
             Keywords:  zscale     |               Blocked By:
             Blocking:             |  Reproduced by developer:  0
Analyzed by developer:  0          |
-----------------------------------+---------------------------------------
 Summary of the bug:

 I was very happy to see slice threading support added to the zscale-filter
 but it appears to have caused a memory leak. The following command used
 just over 12 GiB of memory before crashing. The full report is attached.

 How to reproduce:
 {{{
 % ffmpeg -hide_banner -nostdin -report -i file.mkv -noautoscale
 -filter_complex
 [0:0]zscale=pin=bt709:min=gbr:tin=iec61966-2-1:rin=pc:agamma=false:d=error_diffusion:f=bilinear:p=bt709:m=bt709:t=bt709:r=tv:c=left,format=yuv420p[out]
 -map [out] -f null NUL
 ffmpeg started on 2022-03-04 at 12:57:53
 Report written to "ffmpeg-20220304-125753.log"
 Log level: 48
 Input #0, matroska,webm, from 'file.mkv':
   Metadata:
     ENCODER         : Lavf59.17.101
   Duration: 00:17:36.69, start: 0.000000, bitrate: 74212 kb/s
   Stream #0:0: Video: h264 (High 4:4:4 Predictive), gbrp(pc,
 gbr/bt709/iec61966-2-1, progressive), 1448x1080 [SAR 1:1 DAR 181:135],
 29.97 fps, 29.97 tbr, 1k tbn (default)
     Metadata:
       ENCODER         : Lavc59.20.100 h264_nvenc
       DURATION        : 00:17:36.689000000
   Stream #0:1: Audio: flac, 48000 Hz, stereo, s16 (default)
     Metadata:
       ENCODER         : Lavc59.20.100 flac
       DURATION        : 00:17:36.577000000
 Stream mapping:
   Stream #0:0 (h264) -> zscale:default
   format:default -> Stream #0:0 (wrapped_avframe)
 Output #0, null, to 'NUL':
   Metadata:
     encoder         : Lavf59.17.102
   Stream #0:0: Video: wrapped_avframe, yuv420p(pc, gbr/bt709/iec61966-2-1,
 progressive), 1448x1080 [SAR 1:1 DAR 181:135], q=2-31, 200 kb/s, 29.97
 fps, 29.97 tbn
     Metadata:
       encoder         : Lavc59.21.103 wrapped_avframe
 Error while filtering: Cannot allocate memory8:22.40 bitrate=N/A
 speed=6.21x
 Failed to inject frame into filter network: Cannot allocate memory
 Error while processing the decoded data for stream #0:0
 Conversion failed!
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9679>
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