[FFmpeg-user] Failed installing FFMPEG on CentOS

Sook Sin sooksin at expressinmusic.com
Thu Nov 23 04:06:01 EET 2017

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

/var/www/ffmpeg/libavcodec/mathops.h:248: undefined reference to

/var/www/ffmpeg/libavcodec/mathops.h:246: undefined reference to

/var/www/ffmpeg/libavcodec/mathops.h:247: undefined reference to

/var/www/ffmpeg/libavcodec/mathops.h:245: undefined reference to

8: more undefined references to `ff_reverse' follow

collect2: error: ld returned 1 exit status

make: *** [ffmpeg_g] Error 1


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)


  libavutil      55. 78.100 / 55. 78.100

  libavcodec     57.107.100 / 57.107.100

  libavformat    57. 83.100 / 57. 83.100

  libavdevice    57. 10.100 / 57. 10.100

  libavfilter     6.107.100 /  6.107.100

  libswscale      4.  8.100 /  4.  8.100

  libswresample   2.  9.100 /  2.  9.100

[mp3 @ 0x364d400] Estimating duration from bitrate, this may be inaccurate

Input #0, mp3, from 'test1.mp3':


    title           : Partido De La Playa (Party Rhythm Mix)

    artist          : Jack Hallam

    comment         :

    track           : 1

    genre           : Other

  Duration: 00:03:25.88, start: 0.000000, bitrate: 128 kb/s

    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s

Unknown encoder 'libmp3lame'


Thank you!


Warmest Regards,

Sook Sin

Junior Music Content Executive

Express In Music

www.expressmelody.com <http://www.expressmelody.com>  |
www.expressinmusic.com <http://www.expressinmusic.com> 


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