ブログ - ffmpegをいれてYoutubeからダウンロードしたMP4をMP3に変換する
ffmpegとは動画や音声を変換するツールのスタンダーなやつ．これもbrewで用意されているので入れてみる．まずは情報確認．
やはりモノがモノだけに，関連パッケージもコンパイルオプションもたくさん．何も指定せずにダウンロード．
先ほどダウンロードしたMP4ファイルから，MP3データを取り出す．
変換完了．変換時間は，コンピュータの性能によるかな．
MBP2017:Documents ujpadmin$ brew info ffmpeg🆑
ffmpeg: stable 4.0 (bottled), HEAD
Play, record, convert, and stream audio and video
https://ffmpeg.org/
Not installed
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/ffmpeg.rb
==> Dependencies
Build: nasm ✘, pkg-config ✔, texi2html ✘
Recommended: lame ✘, x264 ✘, xvid ✘
Optional: chromaprint ✘, fdk-aac ✘, fontconfig ✔, freetype ✔, frei0r ✘, game-music-emu
✘, libass ✘, libbluray ✘, libbs2b ✘, libcaca ✘, libgsm ✘, libmodplug ✘, librsvg ✘, libsoxr ✘,
libssh ✘, libvidstab ✘, libvorbis ✘, libvpx ✘, opencore-amr ✘, openh264 ✘, openjpeg ✔,
openssl ✔, opus ✘, rtmpdump ✘, rubberband ✘, sdl2 ✔, snappy ✘, speex ✘, tesseract ✘,
theora ✘, two-lame ✘, wavpack ✘, webp ✘, x265 ✘, xz ✔, zeromq ✘, zimg ✘
==> Options
--with-chromaprint
Enable the Chromaprint audio fingerprinting library
--with-fdk-aac
Enable the Fraunhofer FDK AAC library
--with-fontconfig
Build with fontconfig support
--with-freetype
Build with freetype support
--with-frei0r
Build with frei0r support
--with-game-music-emu
Build with game-music-emu support
--with-libass
Enable ASS/SSA subtitle format
--with-libbluray
Build with libbluray support
--with-libbs2b
Build with libbs2b support
--with-libcaca
Build with libcaca support
--with-libgsm
Build with libgsm support
--with-libmodplug
Build with libmodplug support
--with-librsvg
Enable SVG files as inputs via librsvg
--with-libsoxr
Enable the soxr resample library
--with-libssh
Enable SFTP protocol via libssh
--with-libvidstab
Enable vid.stab support for video stabilization
--with-libvorbis
Build with libvorbis support
--with-libvpx
Build with libvpx support
--with-opencore-amr
Enable Opencore AMR NR/WB audio format
--with-openh264
Enable OpenH264 library
--with-openjpeg
Enable JPEG 2000 image format
--with-openssl
Enable SSL support
--with-opus
Build with opus support
--with-rtmpdump
Enable RTMP protocol
--with-rubberband
Enable rubberband library
--with-sdl2
Enable FFplay media player
--with-snappy
Enable Snappy library
--with-speex
Build with speex support
--with-tesseract
Enable the tesseract OCR engine
--with-theora
Build with theora support
--with-tools
Enable additional FFmpeg tools
--with-two-lame
Build with two-lame support
--with-wavpack
Build with wavpack support
--with-webp
Enable using libwebp to encode WEBP images
--with-x265
Enable x265 encoder
--with-xz
Enable decoding of LZMA-compressed TIFF files
--with-zeromq
Enable using libzeromq to receive commands sent through a libzeromq client
--with-zimg
Enable z.lib zimg library
--without-gpl
Disable building GPL licensed parts of FFmpeg
--without-lame
Disable MP3 encoder
--without-qtkit
Disable deprecated QuickTime framework
--without-securetransport
Disable use of SecureTransport
--without-x264
Disable H.264 encoder
--without-xvid
Disable Xvid MPEG-4 video encoder
--HEAD
Install HEAD version
MBP2017:Documents ujpadmin$
MBP2017:Documents ujpadmin$ brew install ffmpeg🆑
==> Installing dependencies for ffmpeg: lame, x264, xvid
==> Installing ffmpeg dependency: lame
==> Downloading https://homebrew.bintray.com/bottles/lame-3.100.high_sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring lame-3.100.high_sierra.bottle.tar.gz
🍺 /usr/local/Cellar/lame/3.100: 27 files, 2.1MB
==> Installing ffmpeg dependency: x264
==> Downloading https://homebrew.bintray.com/bottles/x264-r2854.high_sierra.bottle.1.tar.gz
######################################################################## 100.0%
==> Pouring x264-r2854.high_sierra.bottle.1.tar.gz
🍺 /usr/local/Cellar/x264/r2854: 11 files, 3.4MB
==> Installing ffmpeg dependency: xvid
==> Downloading https://homebrew.bintray.com/bottles/xvid-1.3.5.high_sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring xvid-1.3.5.high_sierra.bottle.tar.gz
🍺 /usr/local/Cellar/xvid/1.3.5: 10 files, 1.2MB
==> Installing ffmpeg
==> Downloading https://homebrew.bintray.com/bottles/ffmpeg-4.0.high_sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring ffmpeg-4.0.high_sierra.bottle.tar.gz
🍺 /usr/local/Cellar/ffmpeg/4.0: 246 files, 49.6MB
MBP2017:Documents ujpadmin$
MBP2017:Documents ujpadmin$ ffmpeg -i *.mp4 -f mp3 BlueSkyBlue.mp3🆑
ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
built with Apple LLVM version 9.1.0 (clang-902.0.39.1)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0 --enable-shared --enable-pthreads
--enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang
--host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264
--enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
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
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 1.100 / 5. 1.100
libswresample 3. 1.100 / 3. 1.100
libpostproc 55. 1.100 / 55. 1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '西城秀樹 ブルースカイ ブルー-9L3LJqhyfFY.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2018-05-17T06:26:47.000000Z
Duration: 00:04:38.43, start: 0.000000, bitrate: 964 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 946x720
[SAR 1:1 DAR 473:360], 834 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
Metadata:
creation_time : 2018-05-17T06:26:47.000000Z
handler_name : ISO Media file produced by Google Inc. Created on: 05/16/2018.
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2018-05-17T06:26:47.000000Z
handler_name : ISO Media file produced by Google Inc. Created on: 05/16/2018.
Stream mapping:
Stream #0:1 -> #0:0 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
Output #0, mp3, to 'BlueSkyBlue.mp3':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
TSSE : Lavf58.12.100
Stream #0:0(und): Audio: mp3 (libmp3lame), 44100 Hz, stereo, fltp (default)
Metadata:
creation_time : 2018-05-17T06:26:47.000000Z
handler_name : ISO Media file produced by Google Inc. Created on: 05/16/2018.
encoder : Lavc58.18.100 libmp3lame
size= 4351kB time=00:04:38.44 bitrate= 128.0kbits/s speed=51.2x
video:0kB audio:4351kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.007766%
MBP2017:Documents nob
