【後で調べる】CentOS7にffmpegをインストール

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2025.07.122025.12.16

参考サイトを元に同じCentOS7上で実行
インストール後のレポジトリ無効化　epelは残しておく
mp4圧縮
png⇒webpへの変換がうまくいかない。png⇒jpgはできた

参考サイトを元に同じCentOS7上で実行

yum install yum-utils yum install epel-release yum install https://download1.rpmfusion.org/free/el/rpmfusion-free-release-7.noarch.rpm yum update

yum install ffmpeg ffmpeg-devel

インストール後のレポジトリ無効化　epelは残しておく

yum-config-manager --disable　rpmfusion-free-updates
yum update

mp4圧縮

ffmpeg -i hoge_input.mp4 -crf 18 hoge_output.mp4

png⇒webpへの変換がうまくいかない。png⇒jpgはできた

Automatic encoder selection failed for output stream #0:0. Default encoder for format webp (codec webp) is probably disabled. Please choose an encoder manually.
Error selecting an encoder for stream 0:0

# ffmpeg
ffmpeg version 3.4.13 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-44)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --extra-ldflags='-Wl,-z,relro ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-indev=jack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --disable-encoder=libopus --enable-libpulse --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzvbi --enable-avfilter --enable-avresample --enable-libmodplug --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  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
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'

FFmpegのインストールと使用方法（Rocky Linux 9.2 ） #rocky – Qiita