FFMPEG BUILD SCRIPT ANDROID

# -llog: debug only, FFmpeg itself doesn't require it at all. # Without this step, final ld of generating libffmpeg.so will fail silently, if invoke ld through gcc, gcc will collect more reasonable error message. # FFmpeg includes two copies of inverse.c both in libavutil and libavcodec for performance consideration ( not sure the benifit yet) # $PREBUILT/bin/arm-eabi-ar d libavcodec/libavcodec.a inverse.o : required. # if protocols are disabled, the file:// url cannot be opened as well. # which cause them are ignored during file format probling and fall to url stream parsing,

# FFmpeg's av_open_input_file will invoke file format probing functions, but because most of useful demuxers has flag of zero Without this option, the file open always fails mysteriously. Else cannot solve some runtime function symbols ld: warning: cmdutils.o uses variable-size enums yet the output is to use 32-bit enums use of enum values across objects may fail # though we may suppress them by -no-enum-size-warning, it would be better to avoid it. Else FFmpeg obj will generate a huge number of warning for variable-size enums, # ~/android/android-ndk-r4/build/platforms/android-5/arch-arm//usr/include/asm/byteorder.h:25: error: expected ')' before ':' token # ~/android/android-ndk-r4/build/platforms/android-5/arch-arm//usr/include/asm/byteorder.h: In function '_arch_swab32':

FFMPEG BUILD SCRIPT ANDROID

Android header file uses asm keyword instead of _asm_, but most of c dialect (like ansi,c99,gnu99) implies -fno-asm. PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86 PLATFORM=$NDK/platforms/android-8/arch-arm/ #PREBUILT=$NDK/build/prebuilt/darwin-x86/arm-eabi-4.4.0 # ARMv5TE (all android platform can use this version) # It generates binary for following architectures: # put this script in top of FFmpeg source tree # FFmpeg builds script for Android+ARM platform

Ffmpeg build script