Hi Carl and Moritz, Thanks for your assist earlier on, but still the solution couldn't work out. I'm not using a pre-installed binary. The binary should have been created when I initially run ./configure without any parameters. Now I run the following commands: ./configure --enable-gpl --enable-libmp3lame make install Attached are the results of the command line execution. I would like to highlight the ffmpeg folder does not contain the libmp3lame subfolder; could this be the problem? Here's my folder listing: -rwxr--r--. 1 apache apache 57465 Nov 8 06:22 Changelog drwxr--r--. 13 apache apache 278 Nov 8 06:23 compat -rw-r--r--. 1 root root 72752 Nov 28 16:19 config.asm -rwxr--r--. 1 root root 73370 Nov 28 16:19 config.h -rw-r--r--. 1 root root 14128 Nov 28 17:02 config.log -rwxr--r--. 1 apache apache 236719 Nov 8 06:22 configure -rwxr--r--. 1 apache apache 418 Nov 8 06:22 CONTRIBUTING.md -rwxr--r--. 1 apache apache 18092 Nov 8 06:22 COPYING.GPLv2 -rwxr--r--. 1 apache apache 35147 Nov 8 06:22 COPYING.GPLv3 -rwxr--r--. 1 apache apache 26526 Nov 8 06:22 COPYING.LGPLv2.1 -rwxr--r--. 1 apache apache 7651 Nov 8 06:22 COPYING.LGPLv3 -rwxr--r--. 1 apache apache 274 Nov 8 06:22 CREDITS drwxr--r--. 4 apache apache 8192 Nov 11 01:37 doc drwxr--r--. 2 apache apache 214 Nov 8 06:32 ffbuild -rwxr-xr-x. 1 root root 17132592 Nov 11 01:37 ffmpeg -rwxr-xr-x. 1 root root 17046544 Nov 11 01:37 ffprobe -rwxr-xr-x. 1 root root 95058168 Nov 11 01:37 ffprobe_g -rwxr-xr-x. 1 root root 15150064 Nov 11 01:37 ffserver -rwxr-xr-x. 1 root root 86029728 Nov 11 01:37 ffserver_g drwxr--r--. 2 apache apache 4096 Nov 28 16:33 fftools -rwxr--r--. 1 apache apache 595 Nov 8 06:22 INSTALL.md drwxrwxrwx. 4 root root 68 Nov 11 02:37 lame drwxr--r--. 14 apache apache 81920 Nov 28 16:32 libavcodec drwxr--r--. 3 apache apache 4096 Nov 28 16:21 libavdevice drwxr--r--. 4 apache apache 28672 Nov 28 16:22 libavfilter drwxr--r--. 3 apache apache 40960 Nov 28 16:23 libavformat drwxr--r--. 6 apache apache 4096 Nov 8 06:23 libavresample drwxr--r--. 12 apache apache 12288 Nov 28 16:32 libavutil drwxr--r--. 2 apache apache 4096 Nov 28 16:32 libpostproc drwxr--r--. 6 apache apache 4096 Nov 28 16:32 libswresample drwxr--r--. 7 apache apache 4096 Nov 28 16:32 libswscale -rwxr--r--. 1 apache apache 4368 Nov 8 06:22 LICENSE.md -rwxr--r--. 1 apache apache 28905 Nov 8 06:22 MAINTAINERS -rwxr--r--. 1 apache apache 5250 Nov 8 06:22 Makefile -rw-r--r--. 1 root root 2066 Nov 28 16:40 make.log drwxr-xr-x. 2 root root 6 Nov 11 00:59 output1 drwxr-xr-x. 2 root root 6 Nov 11 00:59 output2 drwxr--r--. 2 apache apache 158 Nov 8 06:23 presets -rwxr--r--. 1 apache apache 1893 Nov 8 06:22 README.md -rwxr--r--. 1 apache apache 4 Nov 8 06:22 RELEASE -rwxr--r--. 1 apache apache 839 Nov 8 06:22 RELEASE_NOTES -rw-r--r--. 1 apache apache 3294271 Nov 11 00:56 test1.mp3 drwxr--r--. 7 apache apache 4096 Nov 8 06:22 tests drwxr--r--. 2 apache apache 4096 Nov 8 06:23 tools -rwxr--r--. 1 apache apache 4 Nov 8 06:22 VERSION The command line was last run on 28-Nov. The ffmpeg binary is 11-Nov, so it should have been created earlier on. 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> -----Original Message----- On Thu, Nov 23, 2017 at 10:06:01 +0800, Sook Sin wrote: Please solve this riddle for me:

The 'make' commands shows numerous warnings and an error:

[...]

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

If you didn't manage to compile ffmpeg (the output from make tells me it cannot have created a binary), how did you manage to execute ffmpeg afterwards? Are you actually running a pre-installed binary instead? Moritz From: ffmpeg-user [mailto:ffmpeg-user-bounces@ffmpeg.org] On Behalf Of Carl Eugen Hoyos Sent: Thursday, November 23, 2017 10:25 AM To: FFmpeg user questions Subject: Re: [FFmpeg-user] Failed installing FFMPEG on CentOS 2017-11-23 3:06 GMT+01:00 Sook Sin <sooksin@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 _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-request@ffmpeg.org with subject "unsubscribe".