前言：
现在各位老铁们对“centosg编译参数”大概比较关怀，你们都想要了解一些“centosg编译参数”的相关知识。那么小编也在网络上收集了一些关于“centosg编译参数””的相关文章，希望看官们能喜欢，我们快快来了解一下吧！2. FFmpeg源码下载
FFmpeg源码下载肯定是优先去官网下载：官网 ffmpeg.org/download.ht…
打开官网如下：
可以选择直接下载，或者git命令直接克隆一份，作为开发人员一般都喜欢选择git克隆的方式，这样方便后续更新。
3. FFmpeg编译，安装
3.1 在Mac下编译安装FFmpeg
3.1.1 brew 方式安装
在mac下面可以很方便的使用brew install ffmpeg命令直接安装ffmpeg,如果是新手这样安装比较方便快捷，但是这么安装有个弊端就是不能定制化，如果随着你对FFmpeg的深入，你需要使用一些其他的工具，就需要手动编译安装了，通过源码编译的方式，我们可以自己选择定制化。
我们可以先输入brew search ffmpeg
3.1.2 源码编译 方式安装
首先需要下载ffmpeg, 从官网下载
然后是编译ffmpeg 只需要执行下面3条命令即可：
./configure -prefix=/usr/local/ffmpeg -enable-debug=3make -j 4make install
接下来我们分别执行这3条语句：
执行./configure --prefix=/usr/local/ffmpeg --enable-debug=3 一般我们默认安装在/usr/local/ffmpeg路径下，这个路径可以自由设定，这里我们需要开启debug功能，后面要用到
我们下看看我们下载好的源码目录
你也可以使用./configure --help来查看怎么配置
会打印如下所有选项：
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 filtersStandard 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 --prefix=PREFIX install in PREFIX [/usr/local] --bindir=DIR install binaries in DIR [PREFIX/bin] --datadir=DIR install data files in DIR [PREFIX/share/ffmpeg] --docdir=DIR install documentation in DIR [PREFIX/share/doc/ffmpeg] --libdir=DIR install libs in DIR [PREFIX/lib] --shlibdir=DIR install shared libs in DIR [LIBDIR] --incdir=DIR install includes in DIR [PREFIX/include] --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 targetsLicensing 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-static do not build static libraries [no] --enable-shared build shared libraries [no] --enable-small optimize for size instead of speed --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: --disable-programs do not build command line programs --disable-ffmpeg disable ffmpeg build --disable-ffplay disable ffplay build --disable-ffprobe disable ffprobe buildDocumentation 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 pagesComponent options: --disable-avdevice disable libavdevice build --disable-avcodec disable libavcodec build --disable-avformat disable libavformat build --disable-swresample disable libswresample build --disable-swscale disable libswscale build --disable-postproc disable libpostproc build --disable-avfilter disable libavfilter build --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 libavutilIndividual 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 --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 --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 filtersExternal library support: Using any of the following switches will allow FFmpeg to link to the corresponding external library. All the components depending on that library will become enabled, if all their other dependencies are met and they are not explicitly disabled. E.g. --enable-libwavpack will enable linking to libwavpack and allow the libwavpack encoder to be built, unless it is specifically disabled with --disable-encoder=libwavpack. Note that only the system libraries are auto-detected. All the other external libraries must be explicitly enabled. Also note that the following help text describes the purpose of the libraries themselves, not all their features will necessarily be usable by FFmpeg. --disable-alsa disable ALSA support [autodetect] --disable-appkit disable Apple AppKit framework [autodetect] --disable-avfoundation disable Apple AVFoundation framework [autodetect] --enable-avisynth enable reading of AviSynth script files [no] --disable-bzlib disable bzlib [autodetect] --disable-coreimage disable Apple CoreImage framework [autodetect] --enable-chromaprint enable audio fingerprinting with chromaprint [no] --enable-frei0r enable frei0r video filtering [no] --enable-gcrypt enable gcrypt, needed for rtmp(t)e support if openssl, librtmp or gmp is not used [no] --enable-gmp enable gmp, needed for rtmp(t)e support if openssl or librtmp is not used [no] --enable-gnutls enable gnutls, needed for https support if openssl, libtls or mbedtls is not used [no] --disable-iconv disable iconv [autodetect] --enable-jni enable JNI support [no] --enable-ladspa enable LADSPA audio filtering [no] --enable-libaom enable AV1 video encoding/decoding via libaom [no] --enable-libaribb24 enable ARIB text and caption decoding via libaribb24 [no] --enable-libass enable libass subtitles rendering, needed for subtitles and ass filter [no] --enable-libbluray enable BluRay reading using libbluray [no] --enable-libbs2b enable bs2b DSP library [no] --enable-libcaca enable textual display using libcaca [no] --enable-libcelt enable CELT decoding via libcelt [no] --enable-libcdio enable audio CD grabbing with libcdio [no] --enable-libcodec2 enable codec2 en/decoding using libcodec2 [no] --enable-libdav1d enable AV1 decoding via libdav1d [no] --enable-libdavs2 enable AVS2 decoding via libdavs2 [no] --enable-libdc1394 enable IIDC-1394 grabbing using libdc1394 and libraw1394 [no] --enable-libfdk-aac enable AAC de/encoding via libfdk-aac [no] --enable-libflite enable flite (voice synthesis) support via libflite [no] --enable-libfontconfig enable libfontconfig, useful for drawtext filter [no] --enable-libfreetype enable libfreetype, needed for drawtext filter [no] --enable-libfribidi enable libfribidi, improves drawtext filter [no] --enable-libglslang enable GLSL->SPIRV compilation via libglslang [no] --enable-libgme enable Game Music Emu via libgme [no] --enable-libgsm enable GSM de/encoding via libgsm [no] --enable-libiec61883 enable iec61883 via libiec61883 [no] --enable-libilbc enable iLBC de/encoding via libilbc [no] --enable-libjack enable JACK audio sound server [no] --enable-libklvanc enable Kernel Labs VANC processing [no] --enable-libkvazaar enable HEVC encoding via libkvazaar [no] --enable-liblensfun enable lensfun lens correction [no] --enable-libmodplug enable ModPlug via libmodplug [no] --enable-libmp3lame enable MP3 encoding via libmp3lame [no] --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no] --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no] --enable-libopencv enable video filtering via libopencv [no] --enable-libopenh264 enable H.264 encoding via OpenH264 [no] --enable-libopenjpeg enable JPEG 2000 de/encoding via OpenJPEG [no] --enable-libopenmpt enable decoding tracked files via libopenmpt [no] --enable-libopus enable Opus de/encoding via libopus [no] --enable-libpulse enable Pulseaudio input via libpulse [no] --enable-librabbitmq enable RabbitMQ library [no] --enable-librav1e enable AV1 encoding via rav1e [no] --enable-librsvg enable SVG rasterization via librsvg [no] --enable-librubberband enable rubberband needed for rubberband filter [no] --enable-librtmp enable RTMP[E] support via librtmp [no] --enable-libshine enable fixed-point MP3 encoding via libshine [no] --enable-libsmbclient enable Samba protocol via libsmbclient [no] --enable-libsnappy enable Snappy compression, needed for hap encoding [no] --enable-libsoxr enable Include libsoxr resampling [no] --enable-libspeex enable Speex de/encoding via libspeex [no] --enable-libsrt enable Haivision SRT protocol via libsrt [no] --enable-libssh enable SFTP protocol via libssh [no] --enable-libtensorflow enable TensorFlow as a DNN module backend for DNN based filters like sr [no] --enable-libtesseract enable Tesseract, needed for ocr filter [no] --enable-libtheora enable Theora encoding via libtheora [no] --enable-libtls enable LibreSSL (via libtls), needed for https support if openssl, gnutls or mbedtls is not used [no] --enable-libtwolame enable MP2 encoding via libtwolame [no] --enable-libv4l2 enable libv4l2/v4l-utils [no] --enable-libvidstab enable video stabilization using vid.stab [no] --enable-libvmaf enable vmaf filter via libvmaf [no] --enable-libvo-amrwbenc enable AMR-WB encoding via libvo-amrwbenc [no] --enable-libvorbis enable Vorbis en/decoding via libvorbis, native implementation exists [no] --enable-libvpx enable VP8 and VP9 de/encoding via libvpx [no] --enable-libwavpack enable wavpack encoding via libwavpack [no] --enable-libwebp enable WebP encoding via libwebp [no] --enable-libx264 enable H.264 encoding via x264 [no] --enable-libx265 enable HEVC encoding via x265 [no] --enable-libxavs enable AVS encoding via xavs [no] --enable-libxavs2 enable AVS2 encoding via xavs2 [no] --enable-libxcb enable X11 grabbing using XCB [autodetect] --enable-libxcb-shm enable X11 grabbing shm communication [autodetect] --enable-libxcb-xfixes enable X11 grabbing mouse rendering [autodetect] --enable-libxcb-shape enable X11 grabbing shape rendering [autodetect] --enable-libxvid enable Xvid encoding via xvidcore, native MPEG-4/Xvid encoder exists [no] --enable-libxml2 enable XML parsing using the C library libxml2, needed for dash demuxing support [no] --enable-libzimg enable z.lib, needed for zscale filter [no] --enable-libzmq enable message passing via libzmq [no] --enable-libzvbi enable teletext support via libzvbi [no] --enable-lv2 enable LV2 audio filtering [no] --disable-lzma disable lzma [autodetect] --enable-decklink enable Blackmagic DeckLink I/O support [no] --enable-mbedtls enable mbedTLS, needed for https support if openssl, gnutls or libtls is not used [no] --enable-mediacodec enable Android MediaCodec support [no] --enable-libmysofa enable libmysofa, needed for sofalizer filter [no] --enable-openal enable OpenAL 1.1 capture support [no] --enable-opencl enable OpenCL processing [no] --enable-opengl enable OpenGL rendering [no] --enable-openssl enable openssl, needed for https support if gnutls, libtls or mbedtls is not used [no] --enable-pocketsphinx enable PocketSphinx, needed for asr filter [no] --disable-sndio disable sndio support [autodetect] --disable-schannel disable SChannel SSP, needed for TLS support on Windows if openssl and gnutls are not used [autodetect] --disable-sdl2 disable sdl2 [autodetect] --disable-securetransport disable Secure Transport, needed for TLS support on OSX if openssl and gnutls are not used [autodetect] --enable-vapoursynth enable VapourSynth demuxer [no] --enable-vulkan enable Vulkan code [no] --disable-xlib disable xlib [autodetect] --disable-zlib disable zlib [autodetect] The following libraries provide various hardware acceleration features: --disable-amf disable AMF video encoding code [autodetect] --disable-audiotoolbox disable Apple AudioToolbox code [autodetect] --enable-cuda-nvcc enable Nvidia CUDA compiler [no] --disable-cuda-llvm disable CUDA compilation using clang [autodetect] --disable-cuvid disable Nvidia CUVID support [autodetect] --disable-d3d11va disable Microsoft Direct3D 11 video acceleration code [autodetect] --disable-dxva2 disable Microsoft DirectX 9 video acceleration code [autodetect] --disable-ffnvcodec disable dynamically linked Nvidia code [autodetect] --enable-libdrm enable DRM code (Linux) [no] --enable-libmfx enable Intel MediaSDK (AKA Quick Sync Video) code via libmfx [no] --enable-libnpp enable Nvidia Performance Primitives-based code [no] --enable-mmal enable Broadcom Multi-Media Abstraction Layer (Raspberry Pi) via MMAL [no] --disable-nvdec disable Nvidia video decoding acceleration (via hwaccel) [autodetect] --disable-nvenc disable Nvidia video encoding code [autodetect] --enable-omx enable OpenMAX IL code [no] --enable-omx-rpi enable OpenMAX IL code for Raspberry Pi [no] --enable-rkmpp enable Rockchip Media Process Platform code [no] --disable-v4l2-m2m disable V4L2 mem2mem code [autodetect] --disable-vaapi disable Video Acceleration API (mainly Unix/Intel) code [autodetect] --disable-vdpau disable Nvidia Video Decode and Presentation API for Unix code [autodetect] --disable-videotoolbox disable VideoToolbox code [autodetect]Toolchain options: --arch=ARCH select architecture [] --cpu=CPU select the minimum required CPU (affects instruction selection, may crash on older CPUs) --cross-prefix=PREFIX use PREFIX for compilation tools [] --progs-suffix=SUFFIX program name suffix [] --enable-cross-compile assume a cross-compiler is used --sysroot=PATH root of cross-build tree --sysinclude=PATH location of cross-build system headers --target-os=OS compiler targets OS [] --target-exec=CMD command to run executables on target --target-path=DIR path to view of build directory on target --target-samples=DIR path to samples directory on target --tempprefix=PATH force fixed dir/prefix instead of mktemp for checks --toolchain=NAME set tool defaults according to NAME (gcc-asan, clang-asan, gcc-msan, clang-msan, gcc-tsan, clang-tsan, gcc-usan, clang-usan, valgrind-massif, valgrind-memcheck, msvc, icl, gcov, llvm-cov, hardened) --nm=NM use nm tool NM [nm -g] --ar=AR use archive tool AR [ar] --as=AS use assembler AS [] --ln_s=LN_S use symbolic link tool LN_S [ln -s -f] --strip=STRIP use strip tool STRIP [strip] --windres=WINDRES use windows resource compiler WINDRES [windres] --x86asmexe=EXE use nasm-compatible assembler EXE [nasm] --cc=CC use C compiler CC [gcc] --cxx=CXX use C compiler CXX [g++] --objcc=OCC use ObjC compiler OCC [gcc] --dep-cc=DEPCC use dependency generator DEPCC [gcc] --nvcc=NVCC use Nvidia CUDA compiler NVCC or clang [] --ld=LD use linker LD [] --pkg-config=PKGCONFIG use pkg-config tool PKGCONFIG [pkg-config] --pkg-config-flags=FLAGS pass additional flags to pkgconf [] --ranlib=RANLIB use ranlib RANLIB [ranlib] --doxygen=DOXYGEN use DOXYGEN to generate API doc [doxygen] --host-cc=HOSTCC use host C compiler HOSTCC --host-cflags=HCFLAGS use HCFLAGS when compiling for host --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host --host-ld=HOSTLD use host linker HOSTLD --host-ldflags=HLDFLAGS use HLDFLAGS when linking for host --host-extralibs=HLIBS use libs HLIBS when linking for host --host-os=OS compiler host OS [] --extra-cflags=ECFLAGS add ECFLAGS to CFLAGS [] --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [] --extra-objcflags=FLAGS add FLAGS to OBJCFLAGS [] --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [] --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [] --extra-ldsoflags=ELDFLAGS add ELDFLAGS to LDSOFLAGS [] --extra-libs=ELIBS add ELIBS [] --extra-version=STRING version string suffix [] --optflags=OPTFLAGS override optimization-related compiler flags --nvccflags=NVCCFLAGS override nvcc flags [] --build-suffix=SUFFIX library name suffix [] --enable-pic build position-independent code --enable-thumb compile for Thumb instruction set --enable-lto use link-time optimization --env="ENV=override" override the environment variablesAdvanced options (experts only): --malloc-prefix=PREFIX prefix malloc and related names with PREFIX --custom-allocator=NAME use a supported custom allocator --disable-symver disable symbol versioning --enable-hardcoded-tables use hardcoded tables instead of runtime generation --disable-safe-bitstream-reader disable buffer boundary checking in bitreaders (faster, but may crash) --sws-max-filter-size=N the max filter size swscale uses [256]Optimization options (experts only): --disable-asm disable all assembly optimizations --disable-altivec disable AltiVec optimizations --disable-vsx disable VSX optimizations --disable-power8 disable POWER8 optimizations --disable-amd3dnow disable 3DNow! optimizations --disable-amd3dnowext disable 3DNow! extended optimizations --disable-mmx disable MMX optimizations --disable-mmxext disable MMXEXT optimizations --disable-sse disable SSE optimizations --disable-sse2 disable SSE2 optimizations --disable-sse3 disable SSE3 optimizations --disable-ssse3 disable SSSE3 optimizations --disable-sse4 disable SSE4 optimizations --disable-sse42 disable SSE4.2 optimizations --disable-avx disable AVX optimizations --disable-xop disable XOP optimizations --disable-fma3 disable FMA3 optimizations --disable-fma4 disable FMA4 optimizations --disable-avx2 disable AVX2 optimizations --disable-avx512 disable AVX-512 optimizations --disable-aesni disable AESNI optimizations --disable-armv5te disable armv5te optimizations --disable-armv6 disable armv6 optimizations --disable-armv6t2 disable armv6t2 optimizations --disable-vfp disable VFP optimizations --disable-neon disable NEON optimizations --disable-inline-asm disable use of inline assembly --disable-x86asm disable use of standalone x86 assembly --disable-mipsdsp disable MIPS DSP ASE R1 optimizations --disable-mipsdspr2 disable MIPS DSP ASE R2 optimizations --disable-msa disable MSA optimizations --disable-msa2 disable MSA2 optimizations --disable-mipsfpu disable floating point MIPS optimizations --disable-mmi disable Loongson SIMD optimizations --disable-fast-unaligned consider unaligned accesses slowDeveloper options (useful when working on FFmpeg itself): --disable-debug disable debugging symbols --enable-debug=LEVEL set the debug level [] --disable-optimizations disable compiler optimizations --enable-extra-warnings enable more compiler warnings --disable-stripping disable stripping of executables and shared libraries --assert-level=level 0(default), 1 or 2, amount of assertion testing, 2 causes a slowdown at runtime. --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data --valgrind=VALGRIND run "make fate" tests through valgrind to detect memory leaks and errors, using the specified valgrind binary. Cannot be combined with --target-exec --enable-ftrapv Trap arithmetic overflows --samples=PATH location of test samples for FATE, if not set use $FATE_SAMPLES at make invocation time. --enable-neon-clobber-test check NEON registers for clobbering (should be used only for debugging purposes) --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only; should be used only for debugging purposes) --enable-random randomly enable/disable components --disable-random --enable-random=LIST randomly enable/disable specific components or --disable-random=LIST component groups. LIST is a comma-separated list of NAME[:PROB] entries where NAME is a component (group) and PROB the probability associated with NAME (default 0.5). --random-seed=VALUE seed value for --enable/disable-random --disable-valgrind-backtrace do not print a backtrace under Valgrind (only applies to --disable-optimizations builds) --enable-ossfuzz Enable building fuzzer tool --libfuzzer=PATH path to libfuzzer --ignore-tests=TESTS comma-separated list (without "fate-" prefix in the name) of tests whose result is ignored --enable-linux-perf enable Linux Performance Monitor API --disable-large-tests disable tests that use a large amount of memoryNOTE: Object files are built at the place where configure is launched.
上面包括了很多配置参数，随着我们对ffmpeg的深入，我们也会慢慢了解这些配置参数，刚开始我们只需要知道我们关心的就好了。
例如我们不记得了禁止编译static怎么写的，我们这样查询一下：
./configure --help | grep static
同样我们可以查询一下share相关的
./configure --help | grep share
这里我设置configure时禁止编译静态库，开启动态库，如下：
执行
./configure --prefix=/usr/local/ffmpeg --enable-debug=3 --enable-shared --disable-static
输入上面命令后回车，会等待一段时间，这个时候脚本在查询系统所有匹配的库，如果有不匹配的会有提示，如下图，我的配置会报一个错误：
由于我的电脑没有安装yasm库，所以需要先安装一下：
安装yasm编译器。安装方法如下：
下载：yasm的下载链接解压：把下载下来的压缩包进行解压切换路径： cd yasm-1.3.0执行配置： ./configure编译：make安装：make install（提示：Permission denied，就执行sudo make install）
下面我们下来安装yasm编译器 （1）下载：yasm的下载链接 如果上面的链接下载比较慢，可以从我的百度云盘下载： 链接:pan.baidu.com/s/1oGMcX4HY… 密码:m1k2
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(2) 解压，这里需要用到本篇博客开篇的准备知识的解压命令tar -zxvf yasm-1.3.0.tar
tar -zxvf yasm-1.3.0.tar
（3）切换路径：cd yasm-1.3.0
（4）执行配置：./configure
（5）编译：make
（6）安装：make install（提示：Permission denied，就执行sudo make install）
安装了yasm编译器后，我们从新运行一下configure配置：
./configure --prefix=/usr/local/ffmpeg --enable-debug=3 --enable-shared --disable-static
如果没有报错，则会打印了下面信息：
✘ apple@kongyulu ~/development/study/ffmpeg/ffmpeg/ffmpeg master./configure --prefix=/usr/local/ffmpeg --enable-debug=3 --enable-shared --disable-staticinstall prefix /usr/local/ffmpegsource path .C compiler gccC libraryARCH x86 (generic)big-endian noruntime cpu detection yesstandalone assembly yesx86 assembler yasmMMX enabled yesMMXEXT enabled yes3DNow! enabled yes3DNow! extended enabled yesSSE enabled yesSSSE3 enabled yesAESNI enabled yesAVX enabled yesAVX2 enabled yesAVX-512 enabled yesXOP enabled yesFMA3 enabled yesFMA4 enabled yesi686 features enabled yesCMOV is fast yesEBX available yesEBP available yesdebug symbols yesstrip symbols yesoptimize for size nooptimizations yesstatic noshared yespostprocessing support nonetwork support yesthreading support pthreadssafe bitstream reader yestexi2html enabled noperl enabled yespod2man enabled yesmakeinfo enabled yesmakeinfo supports HTML noExternal libraries:appkit bzlib iconv securetransportavfoundation coreimage lzma zlibExternal libraries providing hardware acceleration:audiotoolbox videotoolboxLibraries:avcodec avfilter avutil swscaleavdevice avformat swresamplePrograms:ffmpeg ffprobeEnabled decoders:aac cscd mp1float rv40aac_at cyuv mp2 s302maac_fixed dca mp2_at samiaac_latm dds mp2float sanmaasc derf_dpcm mp3 sbcac3 dfa mp3_at scprac3_at dirac mp3adu screenpressoac3_fixed dnxhd mp3adufloat sdx2_dpcmacelp_kelvin dolby_e mp3float sgiadpcm_4xm dpx mp3on4 sgirleadpcm_adx dsd_lsbf mp3on4float sheervideoadpcm_afc dsd_lsbf_planar mpc7 shortenadpcm_agm dsd_msbf mpc8 sipradpcm_aica dsd_msbf_planar mpeg1video sirenadpcm_argo dsicinaudio mpeg2video smackaudadpcm_ct dsicinvideo mpeg4 smackeradpcm_dtk dss_sp mpegvideo smcadpcm_ea dst mpl2 smvjpegadpcm_ea_maxis_xa dvaudio msa1 snowadpcm_ea_r1 dvbsub mscc sol_dpcmadpcm_ea_r2 dvdsub msmpeg4v1 sonicadpcm_ea_r3 dvvideo msmpeg4v2 sp5xadpcm_ea_xas dxa msmpeg4v3 speedhqadpcm_g722 dxtory msrle srgcadpcm_g726 dxv mss1 srtadpcm_g726le eac3 mss2 ssaadpcm_ima_alp eac3_at msvideo1 stladpcm_ima_amv eacmv mszh subripadpcm_ima_apc eamad mts2 subvieweradpcm_ima_apm eatgq mv30 subviewer1adpcm_ima_cunning eatgv mvc1 sunrastadpcm_ima_dat4 eatqi mvc2 svq1adpcm_ima_dk3 eightbps mvdv svq3adpcm_ima_dk4 eightsvx_exp mvha takadpcm_ima_ea_eacs eightsvx_fib mwsc targaadpcm_ima_ea_sead escape124 mxpeg targa_y216adpcm_ima_iss escape130 nellymoser tdscadpcm_ima_mtf evrc nuv textadpcm_ima_oki exr on2avc theoraadpcm_ima_qt ffv1 opus thpadpcm_ima_qt_at ffvhuff paf_audio tiertexseqvideoadpcm_ima_rad ffwavesynth paf_video tiffadpcm_ima_smjpeg fic pam tmvadpcm_ima_ssi fits pbm truehdadpcm_ima_wav flac pcm_alaw truemotion1adpcm_ima_ws flashsv pcm_alaw_at truemotion2adpcm_ms flashsv2 pcm_bluray truemotion2rtadpcm_mtaf flic pcm_dvd truespeechadpcm_psx flv pcm_f16le tsccadpcm_sbpro_2 fmvc pcm_f24le tscc2adpcm_sbpro_3 fourxm pcm_f32be ttaadpcm_sbpro_4 fraps pcm_f32le twinvqadpcm_swf frwu pcm_f64be txdadpcm_thp g2m pcm_f64le ultiadpcm_thp_le g723_1 pcm_lxf utvideoadpcm_vima g729 pcm_mulaw v210adpcm_xa gdv pcm_mulaw_at v210xadpcm_yamaha gif pcm_s16be v308adpcm_zork gremlin_dpcm pcm_s16be_planar v408agm gsm pcm_s16le v410aic gsm_ms pcm_s16le_planar vbalac gsm_ms_at pcm_s24be vblealac_at h261 pcm_s24daud vc1alias_pix h263 pcm_s24le vc1imageals h263i pcm_s24le_planar vcr1amr_nb_at h263p pcm_s32be vmdaudioamrnb h264 pcm_s32le vmdvideoamrwb hap pcm_s32le_planar vmncamv hca pcm_s64be vorbisanm hcom pcm_s64le vp3ansi hevc pcm_s8 vp4ape hnm4_video pcm_s8_planar vp5apng hq_hqa pcm_u16be vp6aptx hqx pcm_u16le vp6aaptx_hd huffyuv pcm_u24be vp6farbc hymt pcm_u24le vp7ass iac pcm_u32be vp8asv1 idcin pcm_u32le vp9asv2 idf pcm_u8 vplayeratrac1 iff_ilbm pcm_vidc vqaatrac3 ilbc pcx wavpackatrac3al ilbc_at pgm wcmvatrac3p imc pgmyuv webpatrac3pal imm4 pgssub webvttatrac9 imm5 pictor wmalosslessaura indeo2 pixlet wmaproaura2 indeo3 pjs wmav1avrn indeo4 png wmav2avrp indeo5 ppm wmavoiceavs interplay_acm prores wmv1avui interplay_dpcm prosumer wmv2ayuv interplay_video psd wmv3bethsoftvid jacosub ptx wmv3imagebfi jpeg2000 qcelp wnv1bink jpegls qdm2 wrapped_avframebinkaudio_dct jv qdm2_at ws_snd1binkaudio_rdft kgv1 qdmc xan_dpcmbintext kmvc qdmc_at xan_wc3bitpacked lagarith qdraw xan_wc4bmp loco qpeg xbinbmv_audio lscr qtrle xbmbmv_video m101 r10k xfacebrender_pix mace3 r210 xlc93 mace6 ra_144 xma1cavs magicyuv ra_288 xma2ccaption mdec ralf xpmcdgraphics metasound rasc xsubcdtoons microdvd rawvideo xwdcdxl mimic realtext y41pcfhd mjpeg rl2 ylccinepak mjpegb roq yopclearvideo mlp roq_dpcm yuv4cljr mmvideo rpza zero12vcllc motionpixels rscc zerocodeccomfortnoise movtext rv10 zlibcook mp1 rv20 zmbvcpia mp1_at rv30Enabled encoders:a64multi fits pcm_mulaw_at s302ma64multi5 flac pcm_s16be sbcaac flashsv pcm_s16be_planar sgiaac_at flashsv2 pcm_s16le snowac3 flv pcm_s16le_planar sonicac3_fixed g723_1 pcm_s24be sonic_lsadpcm_adx gif pcm_s24daud srtadpcm_g722 h261 pcm_s24le ssaadpcm_g726 h263 pcm_s24le_planar subripadpcm_g726le h263p pcm_s32be sunrastadpcm_ima_qt h264_videotoolbox pcm_s32le svq1adpcm_ima_wav hevc_videotoolbox pcm_s32le_planar targaadpcm_ms huffyuv pcm_s64be textadpcm_swf ilbc_at pcm_s64le tiffadpcm_yamaha jpeg2000 pcm_s8 truehdalac jpegls pcm_s8_planar ttaalac_at ljpeg pcm_u16be utvideoalias_pix magicyuv pcm_u16le v210amv mjpeg pcm_u24be v308apng mlp pcm_u24le v408aptx movtext pcm_u32be v410aptx_hd mp2 pcm_u32le vc2ass mp2fixed pcm_u8 vorbisasv1 mpeg1video pcm_vidc wavpackasv2 mpeg2video pcx webvttavrp mpeg4 pgm wmav1avui msmpeg4v2 pgmyuv wmav2ayuv msmpeg4v3 png wmv1bmp msvideo1 ppm wmv2cinepak nellymoser prores wrapped_avframecljr opus prores_aw xbmcomfortnoise pam prores_ks xfacedca pbm qtrle xsubdnxhd pcm_alaw r10k xwddpx pcm_alaw_at r210 y41pdvbsub pcm_dvd ra_144 yuv4dvdsub pcm_f32be rawvideo zlibdvvideo pcm_f32le roq zmbveac3 pcm_f64be roq_dpcmffv1 pcm_f64le rv10ffvhuff pcm_mulaw rv20Enabled hwaccels:h263_videotoolbox hevc_videotoolbox mpeg2_videotoolboxh264_videotoolbox mpeg1_videotoolbox mpeg4_videotoolboxEnabled parsers:aac dpx h264 sbcaac_latm dvaudio hevc siprac3 dvbsub mjpeg takadx dvd_nav mlp vc1av1 dvdsub mpeg4video vorbisavs2 flac mpegaudio vp3bmp g723_1 mpegvideo vp8cavsvideo g729 opus vp9cook gif png webpdca gsm pnm xmadirac h261 rv30dnxhd h263 rv40Enabled demuxers:aa filmstrip lrc rplaac fits lvf rsdac3 flac lxf rsoacm flic m4v rtpact flv matroska rtspadf fourxm mgsts s337madp frm microdvd samiads fsb mjpeg sapadx fwse mjpeg_2000 sbcaea g722 mlp sbgafc g723_1 mlv sccaiff g726 mm sdpaix g726le mmf sdr2alp g729 mov sdsamr gdv mp3 sdxamrnb genh mpc segafilmamrwb gif mpc8 seranm gsm mpegps shortenapc gxf mpegts siffape h261 mpegtsraw slnapm h263 mpegvideo smackerapng h264 mpjpeg smjpegaptx hca mpl2 smushaptx_hd hcom mpsub solaqtitle hevc msf soxargo_asf hls msnwc_tcp spdifasf hnm mtaf srtasf_o ico mtv stlass idcin musx strast idf mv subviewerau iff mvi subviewer1av1 ifv mxf supavi ilbc mxg svagavr image2 nc swfavs image2_alias_pix nistsphere takavs2 image2_brender_pix nsp tedcaptionsbethsoftvid image2pipe nsv thpbfi image_bmp_pipe nut threedostrbfstm image_dds_pipe nuv tiertexseqbink image_dpx_pipe ogg tmvbintext image_exr_pipe oma truehdbit image_gif_pipe paf ttabmv image_j2k_pipe pcm_alaw ttyboa image_jpeg_pipe pcm_f32be txdbrstm image_jpegls_pipe pcm_f32le tyc93 image_pam_pipe pcm_f64be v210caf image_pbm_pipe pcm_f64le v210xcavsvideo image_pcx_pipe pcm_mulaw vagcdg image_pgm_pipe pcm_s16be vc1cdxl image_pgmyuv_pipe pcm_s16le vc1tcine image_pictor_pipe pcm_s24be vividascodec2 image_png_pipe pcm_s24le vivocodec2raw image_ppm_pipe pcm_s32be vmdconcat image_psd_pipe pcm_s32le vobsubdata image_qdraw_pipe pcm_s8 vocdaud image_sgi_pipe pcm_u16be vpkdcstr image_sunrast_pipe pcm_u16le vplayerderf image_svg_pipe pcm_u24be vqfdfa image_tiff_pipe pcm_u24le w64dhav image_webp_pipe pcm_u32be wavdirac image_xpm_pipe pcm_u32le wc3dnxhd image_xwd_pipe pcm_u8 webm_dash_manifestdsf ingenient pcm_vidc webvttdsicin ipmovie pjs wsauddss ircam pmp wsddts iss pp_bnk wsvqadtshd iv8 pva wtvdv ivf pvf wvdvbsub ivr qcp wvedvbtxt jacosub r3d xadxa jv rawvideo xbinea kux realtext xmvea_cdata kvag redspark xvageac3 live_flv rl2 xwmaepaf lmlm4 rm yopffmetadata loas roq yuv4mpegpipeEnabled muxers:a64 framemd5 mpeg1video roqac3 g722 mpeg2dvd rsoadts g723_1 mpeg2svcd rtpadx g726 mpeg2video rtp_mpegtsaiff g726le mpeg2vob rtspamr gif mpegts sapapng gsm mpjpeg sbcaptx gxf mxf sccaptx_hd h261 mxf_d10 segafilmasf h263 mxf_opatom segmentasf_stream h264 null singlejpegass hash nut smjpegast hds oga smoothstreamingau hevc ogg soxavi hls ogv spdifavm2 ico oma spxavs2 ilbc opus srtbit image2 pcm_alaw stream_segmentcaf image2pipe pcm_f32be streamhashcavsvideo ipod pcm_f32le supcodec2 ircam pcm_f64be swfcodec2raw ismv pcm_f64le teecrc ivf pcm_mulaw tg2dash jacosub pcm_s16be tgpdata latm pcm_s16le truehddaud lrc pcm_s24be ttadirac m4v pcm_s24le uncodedframecrcdnxhd matroska pcm_s32be vc1dts matroska_audio pcm_s32le vc1tdv md5 pcm_s8 voceac3 microdvd pcm_u16be w64f4v mjpeg pcm_u16le wavffmetadata mkvtimestamp_v2 pcm_u24be webmfifo mlp pcm_u24le webm_chunkfifo_test mmf pcm_u32be webm_dash_manifestfilmstrip mov pcm_u32le webpfits mp2 pcm_u8 webvttflac mp3 pcm_vidc wtvflv mp4 psp wvframecrc mpeg1system rawvideo yuv4mpegpipeframehash mpeg1vcd rmEnabled protocols:async gopher mmst srtpcache hls pipe subfileconcat http prompeg tcpcrypto httpproxy rtmp teedata https rtmps tlsffrtmphttp icecast rtmpt udpfile md5 rtmpts udpliteftp mmsh rtp unixEnabled filters:abench bwdif haldclutsrc scrollabitscope cas hdcd selectacompressor cellauto headphone selectivecoloracontrast channelmap hflip sendcmdacopy channelsplit highpass separatefieldsacrossfade chorus highshelf setdaracrossover chromahold hilbert setfieldacrusher chromakey histogram setparamsacue chromashift hqx setptsaddroi ciescope hstack setrangeadeclick codecview hue setsaradeclip color hwdownload settbadelay colorbalance hwmap showcqtaderivative colorchannelmixer hwupload showfreqsadrawgraph colorhold hysteresis showinfoaecho colorkey idet showpaletteaemphasis colorlevels il showspatialaeval colorspace inflate showspectrumaevalsrc compand interleave showspectrumpicafade compensationdelay join showvolumeafftdn concat lagfun showwavesafftfilt convolution lenscorrection showwavespicafifo convolve life shuffleframesafir copy limiter shuffleplanesafirsrc coreimage loop sidechaincompressaformat coreimagesrc loudnorm sidechaingateagate crop lowpass sidedataagraphmonitor crossfeed lowshelf sierpinskiahistogram crystalizer lumakey signalstatsaiir cue lut silencedetectaintegral curves lut1d silenceremoveainterleave datascope lut2 sincalimiter dcshift lut3d sineallpass dctdnoiz lutrgb smptebarsallrgb deband lutyuv smptehdbarsallyuv deblock mandelbrot sobelaloop decimate maskedclamp spectrumsynthalphaextract deconvolve maskedmax splitalphamerge dedot maskedmerge sramerge deesser maskedmin ssimametadata deflate maskedthreshold stereotoolsamix deflicker maskfun stereowidenamovie dejudder mcompand streamselectamplify derain median superequalizeramultiply deshake mergeplanes surroundanequalizer despill mestimate swaprectanlmdn detelecine metadata swapuvanlms dilation midequalizer tblendanoisesrc displace minterpolate telecineanull dnn_processing mix testsrcanullsink doubleweave movie testsrc2anullsrc drawbox negate thistogramapad drawgraph nlmeans thresholdaperms drawgrid noformat thumbnailaphasemeter drmeter noise tileaphaser dynaudnorm normalize tlut2apulsator earwax null tmedianarealtime ebur128 nullsink tmixaresample edgedetect nullsrc tonemapareverse elbg oscilloscope tpadarnndn entropy overlay transposeaselect equalizer pad trebleasendcmd erosion pal100bars tremoloasetnsamples extractplanes pal75bars trimasetpts extrastereo palettegen unpremultiplyasetrate fade paletteuse unsharpasettb fftdnoiz pan v360ashowinfo fftfilt perms vectorscopeasidedata field photosensitivity vflipasoftclip fieldhint pixdesctest vfrdetasplit fieldmatch pixscope vibranceastats fieldorder premultiply vibratoastreamselect fifo prewitt vignetteasubboost fillborders pseudocolor vmafmotionatadenoise firequalizer psnr volumeatempo flanger qp volumedetectatrim floodfill random vstackavectorscope format readeia608 w3fdifavgblur fps readvitc waveformaxcorrelate framepack realtime weavebandpass framerate remap xbrbandreject framestep removegrain xfadebass freezedetect removelogo xmedianbbox freezeframes replaygain xstackbench gblur reverse yadifbilateral geq rgbashift yaepblurbiquad gradfun rgbtestsrc yuvtestsrcbitplanenoise graphmonitor roberts zoompanblackdetect greyedge rotateblend haas scalebm3d haldclut scale2refEnabled bsfs:aac_adtstoasc filter_units mjpega_dump_header prores_metadataav1_frame_merge h264_metadata mov2textsub remove_extradataav1_frame_split h264_mp4toannexb mp3_header_decompress text2movsubav1_metadata h264_redundant_pps mpeg2_metadata trace_headerschomp hapqa_extract mpeg4_unpack_bframes truehd_coredca_core hevc_metadata noise vp9_metadatadump_extradata hevc_mp4toannexb null vp9_raw_reordereac3_core imx_dump_header opus_metadata vp9_superframeextract_extradata mjpeg2jpeg pcm_rechunk vp9_superframe_splitEnabled indevs:avfoundation lavfiEnabled outdevs:License: LGPL version 2.1 or laterlibavutil/avconfig.h is unchangedlibavfilter/filter_list.c is unchangedlibavcodec/codec_list.c is unchangedlibavcodec/parser_list.c is unchangedlibavcodec/bsf_list.c is unchangedlibavformat/demuxer_list.c is unchangedlibavformat/muxer_list.c is unchangedlibavdevice/indev_list.c is unchangedlibavdevice/outdev_list.c is unchangedlibavformat/protocol_list.c is unchangedffbuild/config.sh is unchanged apple@kongyulu ~/development/study/ffmpeg/ffmpeg/ffmpeg master
这样我们已经成功配置了FFmpeg,接下来执行编译
执行make -j 4 这里命令的意思是增加4个内核，并行编译，这样提高编译速度 执行make命令后，接下来需要等待比较长的时间等编译完成，需要耐心
增加权限后，就可以安装成功了。
这样就成功安装到了/usr/local/ffmpeg 目录下面了，我们切换到这个目录查看一下
我们可以看到有四个子目录：bin, include, lib, share
bin目录：存放所有ffmpeg的工具库include目录： 存放ffmpeg库的所有头文件lib目录：ffmepg生成的动态库或静态库share目录：存放文档相关内容和一些demo实例
我们接下来可以进入bin目录执行命令：
正常会有三个子目录，由于我这里没有安装ffplay所以少了一个ffplay
这是为什么呢？
因为ffplay实际上是客户端ffplay.c的C程序编译出来的，该ffplay.c需要依赖avdevice模块，而avdevice模块使用了sdl的API，如果你的PC上没有sdl(1.x版本，最常用的是1.2.0版本)，那么ffplay就会编译不出来了，所以要想编译出命令行工具ffplay,首先的编译基础库 sdl
Mac OS 安装sdl 库
如果没有安装brew的话，要先安装Homebrew
ruby -e "$(curl -fsSL \)”
等待一段时间，就安装好了，
然后执行命令：
brew install sdl
等待下载并且安装完毕之后，重新执行上述FFmpeg的配置和安装步骤，待make install结束之后，再去bin目录下就可以找到命令行工具ffplay了。
安装完成之后接下来一个很重要的事情就是配置环境变量，如果没有配置，你直接执行ffmpeg命令是会报错的
如果你配置环境变量，则需要每次带上全路径，如下：
/usr/local/ffmpeg/bin/ffmpeg -version
接下来配置环境变量
执行命令
vi ~/.bash_profile
在配置文件加入ffmpeg的bin文件夹路径：
export PATH=$PATH:/usr/local/ffmpeg/bin
然后输入:wq保存退出，再执行下面命令让刚配置的环境变量生效：
source ~/.bash_profile3.2 在Linux下编译安装FFmpeg3.2.1 apt 命令安装
在ubuntu操作系统上可以很容易的跟Mac电脑上执行brew install ffmpeg一样可以一行命令执行 通过执行apt 安装如下：
sudo apt install ffmpeg
这个的弊端也是无法定制化，如果要定制化还是要手动编译源码安装
安装完成后，我们可以执行ffmpeg -version测试是否安装成功
Centos 操作系统下安装
需安装Nux Dextop Yum 源， 由于CentOS没有官方FFmpeg rpm软件包。但是，我们可以使用第三方YUM源（Nux Dextop）完成此工作。
CentOS 7下：
sudo rpm --import rpm -Uvh
然后
sudo yum install ffmpeg ffmpeg-devel -y3.2.2 源码安装官网下载：ffmpeg.org/download.ht… 这里下载最新版本解压安装包
tar -xjvf ffmpeg-4.1.tar.bz2cd ffmpeg-4.1/
跟上面mac源码安装类似，先进行configure配置，配置过程可能报错，如报下面错误：
[root@kongyulu ffmpeg-4.1]# ./configure gcc is unable to create an executable file.If gcc is a cross-compiler, use the --enable-cross-compile option.Only do this if you know what cross compiling means.C compiler test failed.If you think configure made a mistake, make sure you are using the latestversion from Git. If the latest version fails, report the problem to theffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.Include the log file "ffbuild/config.log" produced by configure as this will helpsolve the problem.
则说明yasm编译器没有安装或者太老了，需要先安装新的yasm汇编器。
可以使用--disable-yasm禁用这个选项编译，yasm是一款汇编器，并且是完全重写了nasm的汇编环境，接收nasm和gas语法，支持x86和amd64指令集，所以这里安装一下yasm即可
Linux下安装yasm 跟Mac下安装相似，都是先下载源码，然后配置，编译，安装
官网下载：yasm.tortall.net/Download.ht…
下载后解压，安装
tar -xvzf yasm-1.3.0.tar.gzcd yasm-1.3.0/./configuremakemake install
安装成功后，还是和mac安装ffmpeg一样，需要重新配置FFmpeg:
./configure --enable-shared --prefix=/opt/ffmpeg
/opt/ffmpeg 是配置的安装目录，可以自己配置路径
然后make进行编译
make
安装
make install
make install会把ffmpeg相关执行程序、头文件、lib库安装在/opt/ffmpeg/下
安装完成后可以进入/opt/ffmpeg/查看
发现有bin,include,lib,share这4个目录
bin是ffmpeg主程序二进制目录 include是C/C++头文件目录 lib是编译好的库文件目录 share是文档目录
我们可以进入bin目录执行./ffmpeg -version， 查看当前版本的详细信息 可能会报错：
libavdevice.so.57: cannot open shared object file: No such file or directory
原因是lib目录未加载到链接到系统库中 系统ld目录列表在/etc/ld.so.conf中，打开文件会发现， 里面引用了/etc/ld.so.conf.d/下面所有的.conf文件，比如mariadb-x86_64.conf
解决上面报错，需要创建一个文件并写入lib路径即可
执行命令：vim /etc/ld.so.conf.d/ffmpeg.conf
然后添加一行内容：/opt/ffmpeg/lib之后保存并退出，然后执行 ldconfig使配置生效，再次执行./ffmpeg -version 显示就正常了
正常会打印如下信息
[root@kongyulu ffmpeg-4.1]# ffmpeg -ersionffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developersbuilt with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)configuration: --enable-shared --prefix=/opt/ffmpeg-4libavutil 56. 22.100 / 56. 22.100libavcodec 58. 35.100 / 58. 35.100libavformat 58. 20.100 / 58. 20.100libavdevice 58. 5.100 / 58. 5.100libavfilter 7. 40.101 / 7. 40.101libswscale 5. 3.100 / 5. 3.100libswresample 3. 3.100 / 3. 3.100
接下来需要配置环境变量 使用命令vim /etc/profile：编辑写入↓
PATH=/opt/python364/bin/:/opt/ffmpeg-4/bin/:$PATH
然后执行命令source /etc/profile：使修改后的配置文件生效
检测ffmpeg是否安装成功 执行which ffmpeg 查看安装路径
3.3 在Window下编译安装FFmpeg
3.3.1 Window编译工具介绍
window下编译FFmpeg相对复杂一下，需要借助Cygwin或MinGW来编译，可以通过MinGW+ MSYS2 或者 VS+ MSYS2来编译ffmpeg
Cygwin（Cygnus Windows）实际上相当于在window安装了一个软件来模拟linux系统
MinGW(Minimalist GNU for Windows)是完全模仿了linux的编译工具，相对于将linux的编译工具移植到 window,基于window系统api进行编译，需要提供额外的工具配合使用
VS就是 window开发很熟悉了
MSYS2(Minimal SYStem 2)
3.3.2 Window如何编译ffmpeg
Window编译ffmpeg主要有下面三种方式
Cygwin直接安装使用： Cygwin编译跟linux编译一模一样的，Cygwin完全就像一个虚拟机模拟了linux操作系统。Cygwin实际上是做了一层linux的api到windows 的api的转换。
但是这样编译出来的ffmpeg的exe程序需要挂在一个Cygwin.dll库才可以运行，因为它有一层转换，所以性能对比原始的window程序有一些损耗。
MinGW + MSYS2 : 官方推荐的方式，这种编译出来的就是原生的window程序，不需要和Cygwin一样需要加载一个动态库了。
它的编译方式实际上和linux是一致的
VS + MSYS2： 这种就是采用类linux的编译，只是把里面的工具链换成了VS的工具，但是这种方式生成ffplay比较麻烦。
所以一般都选择MinGW + MSYS2 : 官方推荐的方式
3.3.2.1 Cygwin 编译FFmpeg
在windows下安装 ffmpeg 的最好方式就是使用 Cygwin 。 Cygwin 是什么呢？简单的说，就是在 Windows上装了一个Linux模拟器。然后你可以在这个模拟器上按照Linux的方式操作 Windows系统。因此，Windows安装了 Cygwin 之后，你就把它当Linux用就可以了。
首先，到 Cygwin 官网下载 Cygwin 的可执行程序 setup-x86_64.exe。当然，它是 64位的，如果你现在还在用 32位的，那请在 Cygwin官网上找 32位对应的版本。
首先要安装Cygwin
下载软件后开始安装
选择系统的网络连接方式，跟虚拟机类似
选择镜像安装
选择镜像的对应包
然后选择我们需要的安装包安装，我这里选择 Debug, Devel这两个必须的
此外还需要选择网络
还需要添加wget
此外我们选择一个sdl的库
为了后面编译出ffplay库，最好把下面的红框里面都选上
以上就是一个最小的安装了
需要确保安装了下面这些工具
gccg++makecmakeautomakegdbnasmyasmwget
选好之后继续下一步
等待安装完成
然后点击图标打开
可以看到一个linux的控制台，如果在window下学习linux命名，就可以在这个控制台练习
这样你就可以敲入linux命令了
如果我们要访问window下的D:盘,可以像下面这样访问：
然后要安装apt-cyg: 这个实际就是Cygwin下的apt工具
apt-cyg与 Ubuntu系统中的 apt一样特别好用，而且使用的方式与 apt也是一个样子的。
我们可以在Cygwin下执行下面的命令就好了
wget -c
然后执行命令
install apt-cyg /bin
安装好apt-cyg后，就可以用 apt-cyg instal xxx这样来安装了我们的包了跟Mac下使用brew install xxx一样爽歪歪。
接下来安装pkg-config工具 在Windows系统下，一般不会默认安装该工具，所以在Windows下做实验的同学大都会遇到明明已经装了某个库，但仍然找不到该库的情况。其原因就是没有安装 pkg-config这个工具。 首先确认是否已经将 pkg-config工具安装好了。可以执行下面的命令：
pkg-config
如果提示没有安装，则先将该工具安装好，安装命令如下：
apt-cyg install pkg-config
安装好了上面的工具后，接下来就是下载ffmpeg源码了，从官网：ffmpeg.org/download.ht…
然后就是安装了，安装方式跟mac,linux一样
输入命令：./configure --prefix=/usr/local/ffmpeg 配置环境执行命令：make -j 4 编译源码执行命令：make install 安装
下载源码通过http直接下载或者git下载
这里我使用git方式，先创建一个ffmpeg目录，然后Git clone代码
下载好源码后，进入目录，然后配置configure
配置完成报告如下：
此时make文件已经生成好了，我们输入make -j 4执行编译
这个编译过程比较长，耐心等待
最好执行make install 安装
安装好之后，我们可以进入/usr/local/ffmpeg目录查看
我们可以看到四个目录：bin,include,lib,share接下来，我们进入bin目录：
可以看到三个exe文件，ffmpeg.exe, ffplayer.exe, ffprobe.exe
我们可以执行ffmpeg.exe
接下来也需要配置环境变量，不然每次要带全路径
输入命令：vi ~/.bashrc 编辑配置文件
按快捷键“Shift+G”跳到文件末尾，在配置文件末尾插入：export PATH=/usr/local/ffmpeg/bin:$PATH
然后按esc键，退出编辑模式，输入:wq 保存退出
然后，我们输入source ~/.bashrc使配置文件生效
最好我们输入env | grep PATH来测试配置文件是否生效
配置好环境变量后，我们直接输入ffmpeg.exe就可以找到了
3.3.2.1.2 x264 安装
虽然有了apt-cyg这个神器，但它目前只能安装Linux下的一些常用命令，像我们编译时需要的 x264, x265这些库它是无法找到的。
所以这些库需要我们自己来编译
编译yasm下载源码：wget 解压：tar zxvf yasm-1.3.0.tar.gz切换到目录：cd yasm-1.3.0配置选项：./configure编译安装：make && sudo make install编译fdk-aac下载源码：wget 解压：tar xvf fdk-aac-0.1.6.tar.gz切换到目录: cd fdk-aac-0.1.6配置选项：./configure编译安装：make && sudo make install安装lame下载源码：wget 解压：tar -xzf lame-3.99.5.tar.gz切换到目录:cd lame-3.99.5配置选项：./configure编译安装：make && sudo make install
注：编译lame可能遇到的问题：
问题一： 在Cygwin下安装 lame的时候遇到执行 ./configure 失败的情况。如 "error: cannot guess build type; you must sepcify one"，对这个问题可以通过下面的步骤来解决： 安装automake。可以通过 which automake来确认automake 是否已经安装。如果没有安装，可以通使用 apt-cyg install automake进行安装。 确认automake当前版本。可执行automake --version获取当前automake的版本号。 将 lame目录下的 config.guess文件替换为 /usr/share/automake-version下的config.guess 文件。 此时，再执行./configure进就可以下成功了。问题二： make时出现 "error: '_O_BINARY' undeclared (first use in this function)"的错误，解决办法如下： 打开出错文件 vi ./frontend/lametime.c 将下面这段代码注释掉 /* #elif defined __CYGWIN setmod(fileno(fp), _O_BINARY); */ 再执行make就可以成功了。安装nasm下载源码：wget 解压：tar xvf nasm-2.13.03.tar.gz切换到目录:cd nasm-2.13.03配置选项：./configure编译安装：make && sudo make install安装x264下载源码: wget mirror.yandex.ru/mirrors/ftp… bunzip2 last_x264.tar.bz2解压：tar -vxf last_x264.tar切换到目录:cd last_x264配置选项：./configure --enable-static --enable-shared --disable-asm --disable-avs编译安装: make && sudo make install安装ffmpeg下载源码：wget -c 解压：bunzip2 ffmpeg-4.0.2.tar.bz2切换到目录:cd ffmpeg-4.0.2配置选项：./configure --prefix=/usr/local/ffmpeg --enable-gpl --enable-small --arch=x86_64 --enable-nonfree --enable-libfdk-aac --enable-libx264 --enable-filter=delogo --enable-debug --disable-optimizations --enable-shared编译安装：make && sudo make install
FFmpeg编译的问题:
问题一：找不到 fdk-aac库 在编译ffmpeg时，有可能会报找不到fdk_aac库的错误。此时我们应该设置一下 PKG_CONFIG_PATH，指定ffmpeg到哪里找我们安装好的库。 上面通过源码安装的库，默认地址为/usr/local/lib下面，当然你可以通过./configure 中的–prefix参数改变这个目录。 如果使用默认路径的话，可以通过下面的命令来指定编译时去哪里找库export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig 如果你改变了默认路径，则将后面的 /usr/local/lib/pkgconfig修改为你变更后的路径/xxx/.../lib/pkgconfig即可。3.3.2.2 MinGW + MSYS2 编译FFmpeg3.3.2.3 VS + MSYS2 编译FFmpeg
参考：李超大神的博客和视频：…
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