1、執行如下命令：./configure --help
ffmpeg-3.3.9# ./configure --help
Usage: configure [options]
Options: [defaults in brackets after descriptions]
Help options:
--help print this message
--quiet Suppress showing informative output
--list-decoders show all available decoders
--list-encoders show all available encoders
--list-hwaccels show all available hardware accelerators
--list-demuxers show all available demuxers
--list-muxers show all available muxers
--list-parsers show all available parsers
--list-protocols show all available protocols
--list-bsfs show all available bitstream filters
--list-indevs show all available input devices
--list-outdevs show all available output devices
--list-filters show all available filters
Standard options:
--logfile=FILE log tests and output to FILE [ffbuild/config.log]
--disable-logging do not log configure debug information
--fatal-warnings fail if any configure warning is generated
我們這個已經設置了
--prefix=PREFIX install in PREFIX [/usr/local]
把我們設置的perfix 賦值到此處這裏來
--bindir=DIR install binaries in DIR [PREFIX/bin]
把我們設置的perfix 賦值到此處這裏來
--datadir=DIR install data files in DIR [PREFIX/share/ffmpeg]
把我們設置的perfix 賦值到此處這裏來
--docdir=DIR install documentation in DIR [PREFIX/share/doc/ffmpeg]
把我們設置的perfix 賦值到此處這裏來
--libdir=DIR install libs in DIR [PREFIX/lib]
--shlibdir=DIR install shared libs in DIR [LIBDIR]
把我們設置的perfix 賦值到此處這裏來
--incdir=DIR install includes in DIR [PREFIX/include]
把我們設置的perfix 賦值到此處這裏來
--mandir=DIR install man page in DIR [PREFIX/share/man]
--pkgconfigdir=DIR install pkg-config files in DIR [LIBDIR/pkgconfig]
--enable-rpath use rpath to allow installing libraries in paths
not part of the dynamic linker search path
use rpath when linking programs (USE WITH CARE)
--install-name-dir=DIR Darwin directory name for installed targets
Licensing options:
--enable-gpl allow use of GPL code, the resulting libs
and binaries will be under GPL [no]
--enable-version3 upgrade (L)GPL to version 3 [no]
--enable-nonfree allow use of nonfree code, the resulting libs
and binaries will be unredistributable [no]
Configuration options: disable不開啓，所以還需要看後面有沒有[on]
--disable-static do not build static libraries [no] 默認開啓 靜態庫
--enable-shared build shared libraries [no] 默認不開啓 動態庫
--enable-small optimize for size instead of speed 可以優化庫的大小，可以嘗試加入進去
--disable-runtime-cpudetect disable detecting CPU capabilities at runtime (smaller binary)
--enable-gray enable full grayscale support (slower color)
--disable-swscale-alpha disable alpha channel support in swscale
--disable-all disable building components, libraries and programs
--disable-autodetect disable automatically detected external libraries [no]
Program options:
我們不需要使用程序，不需要在Windows中執行，某.exe程序，我們只需要在代碼中使用 [此命令操作的是下面三項]
--disable-programs do not build command line programs
--disable-ffmpeg disable ffmpeg build
--disable-ffplay disable ffplay build
--disable-ffprobe disable ffprobe build
Documentation options:
--disable-doc do not build documentation
--disable-htmlpages do not build HTML documentation pages
--disable-manpages do not build man documentation pages
--disable-podpages do not build POD documentation pages
--disable-txtpages do not build text documentation pages
FFmpeg 是由各個模塊所組成的
FFmpeg是一套可以用來記錄、轉換數字音頻、視頻，並能將其轉化爲流的開源計算機程序。它包括了領先的音/視頻編碼庫libavcodec等。
libavformat：用於各種音視頻封裝格式的生成和解析，包括獲取解碼所需信息以生成解碼上下文結構和讀取音視頻幀等功能；
libavcodec：用於各種類型聲音/圖像編解碼；
libavutil：包含一些公共的工具函數；
libswscale：用於視頻場景比例縮放、色彩映射轉換；
libpostproc：用於後期效果處理；
ffmpeg：該項目提供的一個工具，可用於格式轉換、解碼或電視卡即時編碼等；
ffsever：一個 HTTP 多媒體即時廣播串流服務器；
ffplay：是一個簡單的播放器，使用ffmpeg 庫解析和解碼，通過SDL顯示；
Component options:
--disable-avdevice disable libavdevice build 可以操作我們的攝像頭（但是在Android中是不支持的），視頻輸出等等
--disable-avcodec disable libavcodec build 包含了音視頻編解碼的東西，默認是開啓的，肯定不能關閉掉
--disable-avformat disable libavformat build 默認開啓的，音視頻封裝格式的生成與解析
--disable-swresample disable libswresample build 對音頻進行重採樣的（如果想把單聲道的視頻，變成雙聲道的視頻，就需要此模塊）
--disable-swscale disable libswscale build 如果對一個視頻 放大 縮小 就需要此模塊
--disable-postproc disable libpostproc build 後期處理的，這個模塊可以關閉掉
--disable-avfilter disable libavfilter build 給視頻加字幕，加水印，就需要此模塊，（默認開啓）
--enable-avresample enable libavresample build (deprecated) [no]
--disable-pthreads disable pthreads [autodetect]
--disable-w32threads disable Win32 threads [autodetect]
--disable-os2threads disable OS/2 threads [autodetect]
--disable-network disable network support [no]
--disable-dct disable DCT code
--disable-dwt disable DWT code
--disable-error-resilience disable error resilience code
--disable-lsp disable LSP code
--disable-lzo disable LZO decoder code
--disable-mdct disable MDCT code
--disable-rdft disable RDFT code
--disable-fft disable FFT code
--disable-faan disable floating point AAN (I)DCT code
--disable-pixelutils disable pixel utils in libavutil
Individual component options:
--disable-everything disable all components listed below
--disable-encoder=NAME disable encoder NAME
--enable-encoder=NAME enable encoder NAME
--disable-encoders disable all encoders 編碼可以去關閉掉
--disable-decoder=NAME disable decoder NAME
--enable-decoder=NAME enable decoder NAME
--disable-decoders disable all decoders
--disable-hwaccel=NAME disable hwaccel NAME
--enable-hwaccel=NAME enable hwaccel NAME
--disable-hwaccels disable all hwaccels
--disable-muxer=NAME disable muxer NAME
--enable-muxer=NAME enable muxer NAME
--disable-muxers disable all muxers 混合封裝（音視頻等於 一段音頻 一段視頻 合併在一起 就是.mp4，不想這樣就可以關閉）
--disable-demuxer=NAME disable demuxer NAME
--enable-demuxer=NAME enable demuxer NAME
--disable-demuxers disable all demuxers
--enable-parser=NAME enable parser NAME
--disable-parser=NAME disable parser NAME
--disable-parsers disable all parsers
--enable-bsf=NAME enable bitstream filter NAME
--disable-bsf=NAME disable bitstream filter NAME
--disable-bsfs disable all bitstream filters
--enable-protocol=NAME enable protocol NAME
--disable-protocol=NAME disable protocol NAME
--disable-protocols disable all protocols
--enable-indev=NAME enable input device NAME
--disable-indev=NAME disable input device NAME
--disable-indevs disable input devices
--enable-outdev=NAME enable output device NAME
--disable-outdev=NAME disable output device NAME
--disable-outdevs disable output devices
--disable-devices disable all devices
--enable-filter=NAME enable filter NAME
--disable-filter=NAME disable filter NAME
--disable-filters disable all filters
備註說明：–disable 代表關閉狀態
–enable 代表開啓狀態