[FFmpeg-user] Failed installing FFMPEG on CentOS

Carl Eugen Hoyos ceffmpeg at gmail.com
Thu Nov 23 04:24:52 EET 2017

2017-11-23 3:06 GMT+01:00 Sook Sin <sooksin at expressinmusic.com>:
> Hi experts! My workplace is currently adopting ffmpeg as a solution to
> normalize audios files in bulk. My colleague is having problem with the
> installation of ffmpeg on Linux. The server is using CentOS Linux release
> 7.3.1611 (Core). We have tried most of the solutions searchable from Google,
> but they do not work. Could it be the issue is due to the wrong versions of
> the dependencies and library files? If so, can someone please guide us in
> resolving this problem?
> The 'make' commands shows numerous warnings and an error:
> libavcodec/libavcodec.a(bitstream.o): In function `bitswap_32':
> /var/www/ffmpeg/libavcodec/mathops.h:245: undefined reference to
> `ff_reverse'

Please confirm that you are trying to build current FFmpeg git head
(nothing else is supported here) and that you are using a sane configure
line like "./configure --enable-gpl --enable-libmp3lame".

> Running the ffmpeg commands shows an error:
> ffmpeg -i test1.mp3 -af "silenceremove=0:0:0:-1:1:-80dB,
> dynaudnorm=p=1:m=3:r=1" -vn -acodec libmp3lame -b:a 12
> 8K -ar 44100 -y test2.mp3
> ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
>   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
>   configuration:

> Unknown encoder 'libmp3lame'

Missing configure option "--enable-libmp3lame"

Carl Eugen

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