我如何修改这个ffmpeg构建脚本以获得最小的二进制大小输出 [英] how do i modify this ffmpeg build script for minimal binary size output

问题描述

我正在尝试在3个芯片组上构建android的ffmpeg二进制文件。输出文件大小太大，不能在项目中包含约15mb。

https://github.com/falnatsheh/ ffmpeg-android 是github项目repo

ffmpeg的.sh构建脚本就像这样

 ＃！/ bin / bash 
 
。 abi_settings.sh $ 1 $ 2 $ 3 
 
 pushd ffmpeg 
 
案例$ 1 
 armeabi-v7a | armeabi-v7a-neon）
 CPU ='cortex-a8'
 ;; 
 x86）
 CPU ='i686'
 ;; 
 esac 
 
 make clean 
 
 ./configure \ 
 --target-os =$ TARGET_OS\ 
  - cross-prefix =$ CROSS_PREFIX\ 
 --arch =$ NDK_ABI\ 
 --cpu =$ CPU\ 
 --enable-runtime-cpudetect \\ \\ 
 --sysroot =$ NDK_SYSROOT\ 
 --enable-pic \ 
 --enable-libx264 \ 
 --enable-pthreads \ 
 --disable-debug \ 
 --disable-ffserver \ 
 --enable-version3 \ 
 --enable-hardcoded-tables \ 
  - disable-ffplay \ 
 --disable-ffprobe \ 
 --enable-gpl \ 
 --enable-yasm \ 
 --disable-doc \ 
 --disable-shared \ 
 --enable-static \ 
 --pkg-config =$ {2} / ffmpeg-pkg-config\ 
  - -prefix =$ {2} / build / $ {1}\ 
 --extra-cflags = -  I $ {TOOLCHAIN_PREFIX} / include $ CFLAGS\ 
 --extra- ldflags = -  L $ {TOOLCHAIN_PREFIX} / lib $ LDFLAGS\ 
 --extra-libs = -  lm\ 
 --extra-cxxflags =$ CXX_FLAGS||退出1 
 
 make -j $ {NUMBER_OF_CORES}&& make install ||退出1 
 
 popd 
  

我尝试添加 - 第一行在配置，但编译器抱怨说，我没有设置一个目标os，即使它的下一行

在应用程序中，我只使用ffmpeg来输入mp4视频并转置和转动
这里是两个命令。

  -y -i％s -vf transpose =％d -tune film -metadata：s：v rotate = 0 -c：v libx264 -preset ultrafast -crf 27 -c：a copy -bsf：a aac_adtstoasc％s 
  

其中％s是文件路径

然后连接文件

$ b -c：一个副本-bsf：a aac_adtstoasc％s

/ code>

如果有人可以通过构建脚本来帮助我，这将是真棒

解决方案

您可以关闭某些功能，并打开解码，多路分解，您需要。

如：

  **  -  disable-demuxers ** 
 **  - 禁用解码器** 
 **  - 禁用设备** 
 **  - 过滤器** 
 **  - 启用解码器= h264 ** 
 **  - 启用解码器= mp3 *** 
 **  -  enable-demuxer = mpegts ** 
  

推荐给你一个开源Android和IOS ffmpeg

https://github.com/bbcallen/ijkplayer

I'm trying to build the ffmpeg binaries for android on 3 chipsets. The output file size is too large to include in the project around 15mb.

https://github.com/falnatsheh/ffmpeg-android is the github project repo

the .sh build script for ffmpeg is like this

#!/bin/bash

. abi_settings.sh $1 $2 $3

pushd ffmpeg

case $1 in
  armeabi-v7a | armeabi-v7a-neon)
    CPU='cortex-a8'
  ;;
  x86)
    CPU='i686'
  ;;
esac

make clean

./configure \
--target-os="$TARGET_OS" \
--cross-prefix="$CROSS_PREFIX" \
--arch="$NDK_ABI" \
--cpu="$CPU" \
--enable-runtime-cpudetect \
--sysroot="$NDK_SYSROOT" \
--enable-pic \
--enable-libx264 \
--enable-pthreads \
--disable-debug \
--disable-ffserver \
--enable-version3 \
--enable-hardcoded-tables \
--disable-ffplay \
--disable-ffprobe \
--enable-gpl \
--enable-yasm \
--disable-doc \
--disable-shared \
--enable-static \
--pkg-config="${2}/ffmpeg-pkg-config" \
--prefix="${2}/build/${1}" \
--extra-cflags="-I${TOOLCHAIN_PREFIX}/include $CFLAGS" \
--extra-ldflags="-L${TOOLCHAIN_PREFIX}/lib $LDFLAGS" \
--extra-libs="-lm" \
--extra-cxxflags="$CXX_FLAGS" || exit 1

make -j${NUMBER_OF_CORES} && make install || exit 1

popd

I tried adding --disable-everything as the first line in configure but then the compiler complains that I didnt set a target-os even though its the next line

In the app I only use ffmpeg to take input mp4 videos and transpose and rotate them here are the two commands

-y -i %s -vf transpose=%d -tune film -metadata:s:v rotate=0 -c:v libx264 -preset ultrafast -crf 27 -c:a copy -bsf:a aac_adtstoasc %s

where %s is a file path

and then concat files

-y -i concat:%s -preset ultrafast -crf 27 -c:v copy -c:a copy -bsf:a aac_adtstoasc %s

If someone can help me with the build script that would be awesome

解决方案

You can turn off some feature, and open the decoding,demultiplexing you need.

such as :

**--disable-demuxers**
**--disable-decoders**
**--disable-devices**
**--disable-filters**
**--enable-decoder=h264**
**--enable-decoder=mp3***
**--enable-demuxer=mpegts**

Recommend to you an open source Android and IOS ffmpeg

https://github.com/bbcallen/ijkplayer

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