You need FFmpeg

[kakadiyahardik]

I have installed ffmpeg 4.0.2 still gives error You need FFmpeg

ffmpeg
ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
configuration: --disable-x86asm
libavutil 56. 14.100 / 56. 14.100
libavcodec 58. 18.100 / 58. 18.100
libavformat 58. 12.100 / 58. 12.100
libavdevice 58. 3.100 / 58. 3.100
libavfilter 7. 16.100 / 7. 16.100
libswscale 5. 1.100 / 5. 1.100
libswresample 3. 1.100 / 3. 1.100

Error at ./configure

./configure
*** Configuring image hash ***

checking CImg.h usability... yes
checking CImg.h presence... yes
checking for CImg.h... yes

*** Configuring video Hash ***

checking whether FFmpeg is present... checking for avcodec_alloc_frame in -lavcodec... no
configure: error:

*** libavcodec not found.
You need FFmpeg. Get it at http://ffmpeg.org/

[andrecbarros]

OK, old thread.

First, it will not work with ffmepg >= 4.

Second, to properly link, at least on linux, issue:
CPPFLAGS="$( pkg-config --cflags libavcodec libavutil )" CFLAGS="$( pkg-config --cflags libavcodec libavutil )" LIBS="$( pkg-config --libs libavcodec libavutil )" ./configure

Third, if you don't need video support, disable it using:
./configure --disable-video-hash

[bbhopesh]

Hey @andrecbarros, this didn't work for me. pkg-config commands are working but it still complaints that ffmpeg not found.

[andrecbarros]

On which system are you testing it? Can, you post the error line of ./configure here?