deband filter crashes on Windows

[Robin Scher]

Summary of the bug:

Any attempt to use the "deband" filter with ffmpeg on Windows results in an immediate crash. It does not seem to matter what input or output or codec or any other settings, though I did not try all possible combinations. The crash is an access violation, but I cannot get debug information currently.

How to reproduce:

> ffmpeg.exe -f image2 -i input_%04d.png -filter:v "deband" output.mpg

ffmpeg version N-82794-g3ab1311 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 42.100 / 55. 42.100
  libavcodec     57. 67.100 / 57. 67.100
  libavformat    57. 58.102 / 57. 58.102
  libavdevice    57.  2.100 / 57.  2.100
  libavfilter     6. 68.100 /  6. 68.100
  libswscale      4.  3.101 /  4.  3.101
  libswresample   2.  4.100 /  2.  4.100
  libpostproc    54.  2.100 / 54.  2.100}}}

Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker.

[Elon Musk]

Could you at least provide one input file you used to reproduce issue?

[Robin Scher]

Here is a sample frame I used for this

[Elon Musk]

Fixed in a251149833505e6097c745ec97f76611ad293a3d.

[Robin Scher]

Awesome, thank you!