Not found derain filter on ffmpeg 4.2.1

[tuencfs]

I have built ffmpeg newest version but not found the filter derain
./ffmpeg -filters | grep rain
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.11) 20160609
configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-shared --enable-filter=derain --enable-libtensorflow --enable-version3
WARNING: library configuration mismatch
avutil configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-shared
avcodec configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-shared
avformat configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-shared
avdevice configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-shared
avfilter configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-shared
swscale configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-shared
swresample configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-shared
postproc configuration: --enable-gpl --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-shared
libavutil 56. 31.100 / 56. 27.100
libavcodec 58. 54.100 / 58. 52.101
libavformat 58. 29.100 / 58. 27.103
libavdevice 58. 8.100 / 58. 7.100
libavfilter 7. 57.100 / 7. 53.100
libswscale 5. 5.100 / 5. 4.101
libswresample 3. 5.100 / 3. 4.100
libpostproc 55. 5.100 / 55. 4.100
TS. removegrain V->V Remove grain.
Could you give me some advice to test the derain filter ?

[guoyejun]

fyi.
i just tried with latest ffmpeg code, and derain is there.

$ ./ffmpeg -filters | grep derain
ffmpeg version N-97024-g1846b08 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
configuration: --prefix=/work/media/ffmpeg/install_dnn --disable-optimizations --enable-libtensorflow --enable-libx264 --enable-gpl
libavutil 56. 42.101 / 56. 42.101
libavcodec 58. 76.100 / 58. 76.100
libavformat 58. 42.100 / 58. 42.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 77.100 / 7. 77.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
T.. derain V->V Apply derain filter to the input.

[tuencfs]

hi guoyejun,
thank for your help