前言
上次解决了FFMpeg-kit编译的问题，但直接编译出来是没有硬件编码支持的，只有软件编解码，软编特别特别慢。所以这次还得继续改代码，让它支持在安卓上使用硬件编码。
如果你没有自己编译过FFMpeg-kit，建议先看看这篇编译教程：
【Android音视频】自编译FFMepg-Kit疑难杂症解决
目录结构
先简单了解一下这个项目，目录结构如下：
bash 代码解读复制代码~/ffmpeg-kit$ tree -L 2
.
├── android <------安卓aar库项目，用于打包成aar
│ ├── build
│ ├── build.gradle
│ ├── ffmpeg-kit-android-lib
│ ├── gradle
│ ├── gradle.properties
│ ├── gradlew
│ ├── gradlew.bat
│ ├── jni
│ ├── libs
│ ├── obj
│ ├── README.md
│ └── settings.gradle
├── android.sh <------安卓一键编译打包脚本
├── apple <------苹果的库项目
│ ├── aclocal.m4
│ ├── ar-lib
│ ├── autogen.sh
│ ├── compile
│ ├── config.guess
│ ├── config.sub
│ ├── configure.ac
│ ├── depcomp
│ ├── Doxyfile
│ ├── install-sh
│ ├── Makefile.am
│ ├── missing
│ ├── README.md
│ └── src
├── apple.sh <------苹果的一键编译打包脚本
├── build.log <------编译日志，多次编译会把log追加在后面，按时间排列
├── CODE_OF_CONDUCT.md
├── CONTRIBUTING.md
├── docs <------离线文档
│ ├── android
│ ├── apple
│ ├── assets
│ ├── _config.yml
│ ├── index.md
│ └── linux
├── flutter <------Flutter的库项目
│ ├── flutter
│ └── flutter_platform_interface
├── ios.sh <------ios的一键打包编译脚本
├── LICENSE
├── linux <------Linux的库项目
│ ├── aclocal.m4
│ ├── ar-lib
│ ├── autogen.sh
│ ├── compile
│ ├── config.guess
│ ├── config.sub
│ ├── configure.ac
│ ├── depcomp
│ ├── Doxyfile
│ ├── install-sh
│ ├── m4
│ ├── Makefile.am
│ ├── missing
│ ├── README.md
│ └── src
├── linux.sh <------Linux的一键打包编译脚本
├── macos.sh <------MacOS的一键打包编译脚本
├── prebuilt <------已经编译好的组件
│ ├── android-arm
│ ├── android-arm64
│ ├── android-arm-neon
│ ├── android-x86
│ ├── android-x86_64
│ └── bundle-android-aar
├── react-native <------RN的库项目
│ ├── android
│ ├── babel.config.js
│ ├── ffmpeg-kit-react-native.podspec
│ ├── ios
│ ├── package.json
│ ├── README.md
│ └── src
├── README.md
├── scripts <------每个组件的编译脚本
│ ├── android
│ ├── apple
│ ├── function-android.sh
│ ├── function-apple.sh
│ ├── function-ios.sh
│ ├── function-linux.sh
│ ├── function-macos.sh
│ ├── function.sh
│ ├── function-tvos.sh
│ ├── linux
│ ├── main-android.sh
│ ├── main-ios.sh
│ ├── main-linux.sh
│ ├── main-macos.sh
│ ├── main-tvos.sh
│ ├── run-android.sh
│ ├── run-apple.sh
│ ├── run-linux.sh
│ ├── source.sh <------版本控制，里面有每个组件的版本和仓库路径
│ └── variable.sh
├── src <------源码，第三方库的源码也放在这里
│ ├── chromaprint
│ ├── cpu-features
│ ├── dav1d
│ ├── expat
│ ├── ffmpeg
│ ├── fontconfig
│ ├── freetype
│ ├── fribidi
│ ├── giflib
│ ├── gmp
│ ├── gnutls
│ ├── harfbuzz
│ ├── jpeg
│ ├── kvazaar
│ ├── lame
│ ├── leptonica
│ ├── libaom
│ ├── libass
│ ├── libiconv
│ ├── libilbc
│ ├── libogg
│ ├── libpng
│ ├── libsamplerate
│ ├── libsndfile
│ ├── libtheora
│ ├── libuuid
│ ├── libvidstab
│ ├── libvorbis
│ ├── libvpx
│ ├── libwebp
│ ├── libxml2
│ ├── nettle
│ ├── opencore-amr
│ ├── openh264
│ ├── openssl
│ ├── opus
│ ├── rubberband
│ ├── sdl
│ ├── shine
│ ├── snappy
│ ├── soxr
│ ├── speex
│ ├── srt
│ ├── tesseract
│ ├── tiff
│ ├── twolame
│ ├── vo-amrwbenc
│ ├── x264
│ ├── x265
│ ├── xvidcore
│ └── zimg
├── tools <------编译工具
│ ├── android
│ ├── apple
│ ├── clean.sh
│ ├── docs
│ ├── license
│ ├── patch
│ ├── protocols
│ └── source
└── tvos.sh <------tvos的一键打包编译脚本
95 directories, 67 files
这玩意支持多个平台的编译，我们只关心安卓平台。重点关注以下文件：
android.sh
scripts/android/ffmpeg.sh
source.sh
读参数
先看看编译的参数选项，安卓平台编译使用目录下的android.sh这个脚本进行，先看看--help
bash 代码解读复制代码./android.sh --help
'android.sh' builds FFmpegKit for Android platform. By default five Android architectures
(armeabi-v7a, armeabi-v7a-neon, arm64-v8a, x86 and x86_64) are built without any external
libraries enabled. Options can be used to disable architectures and/or enable external
libraries. Please note that GPL libraries (external libraries with GPL license) need --enable-
gpl flag to be set explicitly. When compilation ends an Android Archive (AAR) file is created
under the prebuilt folder.
这里可以看到一共支持5个架构：armeabi-v7a, armeabi-v7a-neon, arm64-v8a, x86, x86_64
Usage: ./android.sh [OPTION]... [VAR=VALUE]...
Specify environment variables as VARIABLE=VALUE to override default build options.
Options:
-h, --help display this help and exit
-v, --version display version information and exit
-d, --debug build with debug information
-s, --speed optimize for speed instead of size
-f, --force ignore warnings
-l, --lts build lts packages to support API 16+ devices
--api-level=api override Android api level
--no-ffmpeg-kit-protocols disable custom ffmpeg-kit protocols (saf)
加这个参数可以引用其他GPL第三方库
Licensing options:
--enable-gpl allow building GPL libraries, created libs will be licensed
under the GPLv3.0 [no]
加一条就会ban掉一个架构，每个架构都需要单独编译，所以不需要的就尽情地ban掉
虽然这里括号写的是yes，但实际上你不加参数的话它会编译全部的5个架构。
Architectures:
--disable-arm-v7a do not build arm-v7a architecture [yes]
--disable-arm-v7a-neon do not build arm-v7a-neon architecture [yes]
--disable-arm64-v8a do not build arm64-v8a architecture [yes]
--disable-x86 do not build x86 architecture [yes]
--disable-x86-64 do not build x86-64 architecture [yes]
这里是第三方库相关的支持，加一个就会单独加入一个库，full就是全加。
Libraries:
--full enables all external libraries
--enable-android-media-codec build with built-in Android MediaCodec support [no]
--enable-android-zlib build with built-in zlib support [no]
--enable-chromaprint build with chromaprint [no]
--enable-dav1d build with dav1d [no]
--enable-fontconfig build with fontconfig [no]
--enable-freetype build with freetype [no]
--enable-fribidi build with fribidi [no]
--enable-gmp build with gmp [no]
--enable-gnutls build with gnutls [no]
--enable-kvazaar build with kvazaar [no]
--enable-lame build with lame [no]
--enable-libaom build with libaom [no]
--enable-libass build with libass [no]
--enable-libiconv build with libiconv [no]
--enable-libilbc build with libilbc [no]
--enable-libtheora build with libtheora [no]
--enable-libvorbis build with libvorbis [no]
--enable-libvpx build with libvpx [no]
--enable-libwebp build with libwebp [no]
--enable-libxml2 build with libxml2 [no]
--enable-opencore-amr build with opencore-amr [no]
--enable-openh264 build with openh264 [no]
--enable-openssl build with openssl [no]
--enable-opus build with opus [no]
--enable-sdl build with sdl [no]
--enable-shine build with shine [no]
--enable-snappy build with snappy [no]
--enable-soxr build with soxr [no]
--enable-speex build with speex [no]
--enable-srt build with srt [no]
--enable-tesseract build with tesseract [no]
--enable-twolame build with twolame [no]
--enable-vo-amrwbenc build with vo-amrwbenc [no]
--enable-zimg build with zimg [no]
GPL库，加一个就是单独引入一个，必须和--enable-gpl一起使用
GPL libraries:
--enable-libvidstab build with libvidstab [no]
--enable-rubberband build with rubber band [no]
--enable-x264 build with x264 [no]
--enable-x265 build with x265 [no]
--enable-xvidcore build with xvidcore [no]
Custom libraries:
--enable-custom-library-[n]-name=value name of the custom library []
--enable-custom-library-[n]-repo=value git repository of the source code []
--enable-custom-library-[n]-repo-commit=value git commit to download the source code from []
--enable-custom-library-[n]-repo-tag=value git tag to download the source code from []
--enable-custom-library-[n]-package-config-file-name=value package config file installed by the build script []
--enable-custom-library-[n]-ffmpeg-enable-flag=value library name used in ffmpeg configure script to enable the library []
--enable-custom-library-[n]-license-file=value licence file path relative to the library source folder []
--enable-custom-library-[n]-uses-cpp flag to specify that the library uses libc++ []
Advanced options:
--reconf-LIBRARY run autoreconf before building LIBRARY [no]
--redownload-LIBRARY download LIBRARY even if it is detected as already downloaded [no]
--rebuild-LIBRARY build LIBRARY even if it is detected as already built [no]
这条表示编译之后不打包为aar
--no-archive do not build Android archive [no]
添加硬件编码支持
简单分析一下，我们需要支持安卓的硬件编码器，所以需要mediacodec相关的库，以及名字带安卓的库，其他相关的库看心情加。
这里以arm64-v8a平台为例，添加大多数常见的库，指令如下：
bash代码解读复制代码./android.sh --enable-gpl --enable-libvidstab --enable-rubberband --enable-x264 --enable-x265 --enable-xvidcore --disable-arm-v7a --disable-arm-v7a-neon --disable-x86 --disable-x86-64 --enable-android-media-codec --enable-android-zlib --enable-kvazaar --enable-lame --enable-libaom --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-opencore-amr --enable-openh264 --enable-opus --enable-speex --enable-twolame --enable-vo-amrwbenc --enable-shine --enable-snappy --enable-soxr --enable-sdl
这些第三方库会下载到src/[库名称]目录下，需要用到git和gradle，建议开魔法，如果gradle的插件下载不下来，可以看看开头提到的上一篇文章有写怎么处理。
升级FFMpeg版本
除了FFMepg-kit的参数以外，FFMepg自己也有编译参数。
bash 代码解读复制代码cd src/ffmpeg
./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 <------查看当前版本支持的解码器
--list-encoders show all available encoders <------查看当前版本支持的编码器
--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
--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 targets
Licensing options:
--enable-gpl allow use of GPL code, the resulting libs <------使用第三方GPL库
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 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
ban掉指定的组件
Component 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
--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-dwt disable DWT code
--disable-error-resilience disable error resilience code
--disable-lsp disable LSP code
--disable-faan disable floating point AAN (I)DCT code
--disable-iamf disable support for Immersive Audio Model
--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
--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 filters
External 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-libopus will enable linking to
libopus and allow the libopus encoder to be built, unless it is
specifically disabled with --disable-encoder=libopus.
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-lcms2 enable ICC profile support via LittleCMS 2 [no]
--enable-libaom enable AV1 video encoding/decoding via libaom [no]
--enable-libaribb24 enable ARIB text and caption decoding via libaribb24 [no]
--enable-libaribcaption enable ARIB text and caption decoding via libaribcaption [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-libdvdnav enable libdvdnav, needed for DVD demuxing [no]
--enable-libdvdread enable libdvdread, needed for DVD demuxing [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-libharfbuzz enable libharfbuzz, needed for 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-libjxl enable JPEG XL de/encoding via libjxl [no]
--enable-libklvanc enable Kernel Labs VANC processing [no]
--enable-libkvazaar enable HEVC encoding via libkvazaar [no]
--enable-liblc3 enable LC3 de/encoding via liblc3 [no]
--enable-liblcevc-dec enable LCEVC decoding via liblcevc-dec [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 encoding via OpenJPEG [no]
--enable-libopenmpt enable decoding tracked files via libopenmpt [no]
--enable-libopenvino enable OpenVINO as a DNN module backend
for DNN based filters like dnn_processing [no]
--enable-libopus enable Opus de/encoding via libopus [no]
--enable-libplacebo enable libplacebo library [no]
--enable-libpulse enable Pulseaudio input via libpulse [no]
--enable-libqrencode enable QR encode generation via libqrencode [no]
--enable-libquirc enable QR decoding via libquirc [no]
--enable-librabbitmq enable RabbitMQ library [no]
--enable-librav1e enable AV1 encoding via rav1e [no]
--enable-librist enable RIST via librist [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-libshaderc enable GLSL->SPIRV compilation via libshaderc [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-libsvtav1 enable AV1 encoding via SVT [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-libtorch enable Torch as one DNN backend [no]
--enable-libtwolame enable MP2 encoding via libtwolame [no]
--enable-libuavs3d enable AVS3 decoding via libuavs3d [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-libvvenc enable H.266/VVC encoding via vvenc [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-libxeve enable EVC encoding via libxeve [no]
--enable-libxevd enable EVC decoding via libxevd [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 and imf 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-mediafoundation enable encoding via MediaFoundation [auto]
--disable-metal disable Apple Metal framework [autodetect]
--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]
--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-d3d12va disable Microsoft Direct3D 12 video acceleration code [autodetect]
--disable-dxva2 disable Microsoft DirectX 9 video acceleration code [autodetect]
--disable-ffnvcodec disable dynamically linked Nvidia code [autodetect]
--disable-libdrm disable DRM code (Linux) [autodetect]
--enable-libmfx enable Intel MediaSDK (AKA Quick Sync Video) code via libmfx [no]
--enable-libvpl enable Intel oneVPL code via libvpl if libmfx is not used [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]
--disable-vulkan disable Vulkan 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]
--stdc=STDC use C standard STDC [c17]
--cxx=CXX use C compiler CXX [g++]
--stdcxx=STDCXX use C standard STDCXX [c++11]
--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 []
--metalcc=METALCC use metal compiler METALCC [xcrun -sdk macosx metal]
--metallib=METALLIB use metal linker METALLIB [xcrun -sdk macosx metallib]
--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[=arg] use link-time optimization
--env="ENV=override" override the environment variables
Advanced 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-avx512icl disable AVX-512ICL 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-dotprod disable DOTPROD optimizations
--disable-i8mm disable I8MM 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-mipsfpu disable floating point MIPS optimizations
--disable-mmi disable Loongson MMI optimizations
--disable-lsx disable Loongson LSX optimizations
--disable-lasx disable Loongson LASX optimizations
--disable-rvv disable RISC-V Vector optimizations
--disable-fast-unaligned consider unaligned accesses slow
Developer 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
--enable-macos-kperf enable macOS kperf (private) API
--disable-large-tests disable tests that use a large amount of memory
--disable-ptx-compression don't compress CUDA PTX code even when possible
--disable-version-tracking don't include the git/release version in the build
NOTE: Object files are built at the place where configure is launched.
如果.configure --list-encoders打印出来的一长串编码器里面没有你要的，可以尝试升级FFMpeg的版本试试，新版本可能会支持新的编码器。比如我这里的目标是想要支持av1_mediacodec
现在我们改一下FFMepg的版本号，打开scripts/source.sh这个文件，找到get_library_source这个函数：
bash 代码解读复制代码#
# 1. library name
# 2. source type 1/2/3
#
get_library_source() {
case $1 in
config)
SOURCE_REPO_URL="https://github.com/arthenica/gnu-config"
SOURCE_ID="v20210814"
SOURCE_TYPE="TAG"
;;
chromaprint)
SOURCE_REPO_URL="https://github.com/arthenica/chromaprint"
SOURCE_ID="v1.5.1"
SOURCE_TYPE="TAG"
;;
cpu-features)
SOURCE_REPO_URL="https://github.com/arthenica/cpu_features"
SOURCE_ID="v0.8.0"
SOURCE_TYPE="TAG"
;;
dav1d)
SOURCE_REPO_URL="https://github.com/arthenica/dav1d"
SOURCE_ID="1.2.1"
SOURCE_TYPE="TAG"
;;
expat)
SOURCE_REPO_URL="https://github.com/arthenica/libexpat"
SOURCE_ID="R_2_5_0"
SOURCE_TYPE="TAG"
;;
ffmpeg)
SOURCE_REPO_URL="https://github.com/arthenica/FFmpeg"
SOURCE_ID="n7.1" <------改这个
SOURCE_TYPE="TAG"
;;
fontconfig)
SOURCE_REPO_URL="https://github.com/arthenica/fontconfig"
SOURCE_ID="2.14.2"
SOURCE_TYPE="TAG"
;;
freetype)
SOURCE_REPO_URL="https://github.com/arthenica/freetype2"
SOURCE_ID="VER-2-13-0"
SOURCE_TYPE="TAG"
;;
fribidi)
SOURCE_REPO_URL="https://github.com/arthenica/fribidi"
SOURCE_ID="v1.0.13"
SOURCE_TYPE="TAG"
;;
giflib)
SOURCE_REPO_URL="https://github.com/arthenica/giflib"
SOURCE_ID="5.2.1"
SOURCE_TYPE="TAG"
;;
gmp)
SOURCE_REPO_URL="https://github.com/arthenica/gmp"
SOURCE_ID="v6.2.1"
SOURCE_TYPE="TAG"
;;
gnutls)
SOURCE_REPO_URL="https://github.com/arthenica/gnutls"
SOURCE_ID="3.7.9"
SOURCE_TYPE="TAG"
;;
harfbuzz)
SOURCE_REPO_URL="https://github.com/arthenica/harfbuzz"
SOURCE_ID="8.0.1"
SOURCE_TYPE="TAG"
;;
jpeg)
SOURCE_REPO_URL="https://github.com/arthenica/libjpeg-turbo"
SOURCE_ID="3.0.0"
SOURCE_TYPE="TAG"
;;
kvazaar)
SOURCE_REPO_URL="https://github.com/arthenica/kvazaar"
SOURCE_ID="v2.2.0"
SOURCE_TYPE="TAG"
;;
lame)
SOURCE_REPO_URL="https://github.com/arthenica/lame"
SOURCE_ID="RELEASE__3_100"
SOURCE_TYPE="TAG"
;;
leptonica)
SOURCE_REPO_URL="https://github.com/arthenica/leptonica"
SOURCE_ID="1.83.1"
SOURCE_TYPE="TAG"
;;
libaom)
SOURCE_REPO_URL="https://github.com/arthenica/libaom"
SOURCE_ID="v3.6.1"
SOURCE_TYPE="TAG"
;;
................................
SOURCE_REPO_URL是仓库地址
SOURCE_ID是TAG或分支的名字
SOURCE_TYPE是根据TAG还是根据分支确定版本
改完版本以后跑脚本的时候要加个--redownload-ffmpeg，不然版本不会变，还是旧的。
默认的ffmpeg是n6.0，我给改成n7.1了，但编译有点问题，详见后面的疑难杂症章节。
疑难杂症
dav1d库编译报错
报错如下
bash 代码解读复制代码The Meson build system
Version: 0.53.2
Source dir: ~/ffmpeg-kit/src/dav1d
Build dir: ~/ffmpeg-kit/.tmp/cmake/build/android-arm64/dav1d
Build type: cross build
Project name: dav1d
Project version: 1.2.1
Appending CFLAGS from environment: '-march=armv8-a -DFFMPEG_KIT_ARM64_V8A -std=c99 -Wno-unused-function -fno-integrated-as -fstrict-aliasing -DANDROID_NDK -fPIC -DANDROID -D__ANDROID__ -D__ANDROID_API__=24 -Os -ffunction-sections -fdata-sections '
Appending LDFLAGS from environment: ['-march=armv8-a', '-Wl,--gc-sections', '-Os', '-ffunction-sections', '-fdata-sections', '-lc', '-lm', '-ldl', '-llog', '-L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/aarch64-linux-android/lib', '-L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/aarch64-linux-android/24', '-L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/lib', '-Wl,--hash-style=both', '-Wl,--exclude-libs,libgcc.a', '-Wl,--exclude-libs,libunwind.a']
meson.build:25:0: ERROR: Could not invoke sanity test executable: [Errno 8] Exec format error: '~/ffmpeg-kit/.tmp/cmake/build/android-arm64/dav1d/meson-private/sanitycheckc.exe'.
Build started at 2024-11-19T14:13:25.654470
Main binary: /usr/bin/python3
Build Options: -Db_lto=false -Db_ndebug=false -Denable_asm=false -Denable_tools=false -Denable_examples=false -Denable_tests=false '--cross-file ~/ffmpeg-kit/src/dav1d/package/crossfiles/arm64-v8a-android.meson'
Python system: Linux
The Meson build system
Version: 0.53.2
Source dir: ~/ffmpeg-kit/src/dav1d
Build dir: ~/ffmpeg-kit/.tmp/cmake/build/android-arm64/dav1d
Build type: cross build
Project name: dav1d
Project version: 1.2.1
Appending CFLAGS from environment: '-march=armv8-a -DFFMPEG_KIT_ARM64_V8A -std=c99 -Wno-unused-function -fno-integrated-as -fstrict-aliasing -DANDROID_NDK -fPIC -DANDROID -D__ANDROID__ -D__ANDROID_API__=24 -Os -ffunction-sections -fdata-sections '
Appending LDFLAGS from environment: ['-march=armv8-a', '-Wl,--gc-sections', '-Os', '-ffunction-sections', '-fdata-sections', '-lc', '-lm', '-ldl', '-llog', '-L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/aarch64-linux-android/lib', '-L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/aarch64-linux-android/24', '-L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/lib', '-Wl,--hash-style=both', '-Wl,--exclude-libs,libgcc.a', '-Wl,--exclude-libs,libunwind.a']
No CPPFLAGS in the environment, not changing global flags.
Sanity testing C compiler: aarch64-linux-android24-clang
Is cross compiler: False.
Sanity check compiler command line: aarch64-linux-android24-clang ~/ffmpeg-kit/.tmp/cmake/build/android-arm64/dav1d/meson-private/sanitycheckc.c -o ~/ffmpeg-kit/.tmp/cmake/build/android-arm64/dav1d/meson-private/sanitycheckc.exe -march=armv8-a -DFFMPEG_KIT_ARM64_V8A -std=c99 -Wno-unused-function -fno-integrated-as -fstrict-aliasing -DANDROID_NDK -fPIC -DANDROID -D__ANDROID__ -D__ANDROID_API__=24 -Os -ffunction-sections -fdata-sections -pipe -D_FILE_OFFSET_BITS=64 -Wl,--gc-sections -lc -lm -ldl -llog -L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/aarch64-linux-android/lib -L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/aarch64-linux-android/24 -L~/Android/Sdk/ndk/22.0.6917172/toolchains/llvm/prebuilt/linux-x86_64/lib -Wl,--hash-style=both -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libunwind.a
Sanity check compile stdout:
-----
Sanity check compile stderr:
-----
Running test binary command: ~/ffmpeg-kit/.tmp/cmake/build/android-arm64/dav1d/meson-private/sanitycheckc.exe
meson.build:25:0: ERROR: Could not invoke sanity test executable: [Errno 8] Exec format error: '~/ffmpeg-kit/.tmp/cmake/build/android-arm64/dav1d/meson-private/sanitycheckc.exe'.
原因：大概是说尝试运行这个文件的时候报错了，暂时没找到解决办法。不过这是个软解库，直接放弃也问题不大。
ffmpeg提示缺文件
错误信息
bash 代码解读复制代码无法获取'/home/dubhe/ffmpeg-kit/src/ffmpeg/libavutil/x86/emms.h'
它找的这个文件本来就不存在，我们编译arm64不应该去x86目录下找文件。原因是编译脚本有问题，打开scripts/android/ffmpeg.sh这个文件修改ffmpeg的编译参数，找到这坨代码
bash 代码解读复制代码./configure \
--cross-prefix="${HOST}-" \
--sysroot="${ANDROID_SYSROOT}" \
--prefix="${FFMPEG_LIBRARY_PATH}" \
--pkg-config="${HOST_PKG_CONFIG_PATH}" \
--enable-version3 \
--arch="${TARGET_ARCH}" \
--cpu="${TARGET_CPU}" \
--target-os=android \
${ASM_OPTIONS} \
--ar="${AR}" \
--cc="${CC}" \
--cxx="${CXX}" \
--ranlib="${RANLIB}" \
--strip="${STRIP}" \
--nm="${NM}" \
--extra-libs="$(pkg-config --libs --static cpu-features)" \
--disable-autodetect \
--enable-cross-compile \
--enable-pic \
--enable-jni \
--enable-optimizations \
--enable-swscale \
${BUILD_LIBRARY_OPTIONS} \
--enable-pthreads \
--enable-v4l2-m2m \
--disable-outdev=fbdev \
--disable-indev=fbdev \
${SIZE_OPTIONS} \
--disable-xmm-clobber-test \
${DEBUG_OPTIONS} \
--disable-neon-clobber-test \
--disable-programs \
--disable-postproc \
--disable-doc \
--disable-htmlpages \
--disable-manpages \
--disable-podpages \
--disable-txtpages \
--disable-sndio \
--disable-schannel \
--disable-securetransport \
--disable-xlib \
--disable-cuda \
--disable-cuvid \
--disable-nvenc \
--disable-vaapi \
--disable-vdpau \
--disable-videotoolbox \
--disable-audiotoolbox \
--disable-appkit \
--disable-alsa \
--disable-cuda \
--disable-cuvid \
--disable-nvenc \
--disable-vaapi \
--disable-vdpau \
--disable-x86asm \ <-----添加这两行
--disable-runtime-cpudetect \ <-----添加这两行
${CONFIGURE_POSTFIX} 1>>"${BASEDIR}"/build.log 2>&1
然后往下找到# MANUALLY ADD REQUIRED HEADERS这段注释，能看到它根本没管现在到底目标是什么架构就闭着眼睛把每个架构都去build了一遍。
bash 代码解读复制代码# MANUALLY ADD REQUIRED HEADERS mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavutil/x86
1>>"${BASEDIR}"/build.log 2>&1 mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavutil/arm
1>>"${BASEDIR}"/build.log 2>&1 mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavutil/aarch64
1>>"${BASEDIR}"/build.log 2>&1 mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavcodec/x86
1>>"${BASEDIR}"/build.log 2>&1 mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavcodec/arm
1>>"${BASEDIR}"/build.log 2>&1 overwrite_file "${BASEDIR}"/src/ffmpeg/config.h
"${FFMPEG_LIBRARY_PATH}"/include/config.h 1>>"${BASEDIR}"/build.log 2>&1 overwrite_file
"${BASEDIR}"/src/ffmpeg/libavcodec/mathops.h
"${FFMPEG_LIBRARY_PATH}"/include/libavcodec/mathops.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavcodec/x86/mathops.h
"${FFMPEG_LIBRARY_PATH}"/include/libavcodec/x86/mathops.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavcodec/arm/mathops.h
"${FFMPEG_LIBRARY_PATH}"/include/libavcodec/arm/mathops.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavformat/network.h
"${FFMPEG_LIBRARY_PATH}"/include/libavformat/network.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavformat/os_support.h
"${FFMPEG_LIBRARY_PATH}"/include/libavformat/os_support.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavformat/url.h
"${FFMPEG_LIBRARY_PATH}"/include/libavformat/url.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/attributes_internal.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/attributes_internal.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/bprint.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/bprint.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/getenv_utf8.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/getenv_utf8.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/internal.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/internal.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/libm.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/libm.h 1>>"${BASEDIR}"/build.log 2>&1 overwrite_file
"${BASEDIR}"/src/ffmpeg/libavutil/reverse.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/reverse.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/thread.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/thread.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/timer.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/timer.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/x86/asm.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/x86/asm.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/x86/timer.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/x86/timer.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/arm/timer.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/arm/timer.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/aarch64/timer.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/aarch64/timer.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/x86/emms.h
"${FFMPEG_LIBRARY_PATH}"/include/libavutil/x86/emms.h 1>>"${BASEDIR}"/build.log 2>&1
给它改成根据当前选择的架构来build
bash 代码解读复制代码# MANUALLY ADD REQUIRED HEADERS
# 根据当前架构判断并选择性创建对应的头文件目录
if [[ "$ARCH" == "arm" ]]; then
mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavutil/arm 1>>"${BASEDIR}"/build.log 2>&1
mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavcodec/arm 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavcodec/arm/mathops.h "${FFMPEG_LIBRARY_PATH}"/include/libavcodec/arm/mathops.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/arm/timer.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/arm/timer.h 1>>"${BASEDIR}"/build.log 2>&1
elif [[ "$ARCH" == "arm64-v8a" ]]; then
mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavutil/aarch64 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/aarch64/timer.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/aarch64/timer.h 1>>"${BASEDIR}"/build.log 2>&1
elif [[ "$ARCH" == "x86" ]]; then
mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavutil/x86 1>>"${BASEDIR}"/build.log 2>&1
mkdir -p "${FFMPEG_LIBRARY_PATH}"/include/libavcodec/x86 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavcodec/x86/mathops.h "${FFMPEG_LIBRARY_PATH}"/include/libavcodec/x86/mathops.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/x86/asm.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/x86/asm.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/x86/timer.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/x86/timer.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/x86/emms.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/x86/emms.h 1>>"${BASEDIR}"/build.log 2>&1
else
echo "Unsupported architecture: $ARCH" 1>>"${BASEDIR}"/build.log 2>&1
exit 1
fi
overwrite_file "${BASEDIR}"/src/ffmpeg/config.h "${FFMPEG_LIBRARY_PATH}"/include/config.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavcodec/mathops.h "${FFMPEG_LIBRARY_PATH}"/include/libavcodec/mathops.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavformat/network.h "${FFMPEG_LIBRARY_PATH}"/include/libavformat/network.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavformat/os_support.h "${FFMPEG_LIBRARY_PATH}"/include/libavformat/os_support.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavformat/url.h "${FFMPEG_LIBRARY_PATH}"/include/libavformat/url.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/attributes_internal.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/attributes_internal.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/bprint.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/bprint.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/getenv_utf8.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/getenv_utf8.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/internal.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/internal.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/libm.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/libm.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/reverse.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/reverse.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/thread.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/thread.h 1>>"${BASEDIR}"/build.log 2>&1
overwrite_file "${BASEDIR}"/src/ffmpeg/libavutil/timer.h "${FFMPEG_LIBRARY_PATH}"/include/libavutil/timer.h 1>>"${BASEDIR}"/build.log 2>&1
ffmpeg-kit报找不到头文件
报错信息
bash 代码解读复制代码[arm64-v8a] Compile : ffmpegkit <= ffmpegkit.c
[arm64-v8a] Compile : ffmpegkit <= ffprobekit.c
jni/../ffmpeg-kit-android-lib/src/main/cpp/ffprobekit.c:68:49: error: implicitly declaring library function 'strlen' with type 'unsigned long (const char *)' [-Werror,-Wimplicit-function-declaration]
argv[0] = (char *)av_malloc(sizeof(char) * (strlen(LIB_NAME) + 1));
^
jni/../ffmpeg-kit-android-lib/src/main/cpp/ffprobekit.c:68:49: note: include the header or explicitly provide a declaration for 'strlen'
jni/../ffmpeg-kit-android-lib/src/main/cpp/ffprobekit.c:69:5: error: implicitly declaring library function 'strcpy' with type 'char *(char *, const char *)' [-Werror,-Wimplicit-function-declaration]
strcpy(argv[0], LIB_NAME);
^
jni/../ffmpeg-kit-android-lib/src/main/cpp/ffprobekit.c:69:5: note: include the header or explicitly provide a declaration for 'strcpy'
2 errors generated.
make: *** [/home/dubhe/Android/Sdk/ndk/22.0.6917172/build/core/build-binary.mk:476: obj/local/arm64-v8a/objs/ffmpegkit/ffprobekit.o] Error 1
缺个头文件，手动加一下，打开android/ffmpeg-kit-android-lib/src/main/cpp/ffprobekit.c这个文件，在开头的一堆include里面加入
C 代码解读复制代码#include
运行Demo
编译完成后，把aar丢到上篇文章的demo里，直接运行即可。
在Demo运行起来的Activity里输入--encoders即可看到支持的编码器。
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