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• ffmpeg for android build - is it complete

  3 février 2015, par Robert Rowntree

  //EDIT save time and refer to the SF project . IMO, it may save a ton of work getting up to speed.....

  after more work on this issue :

  added a git project

  build is easier with custom toolchain installed so that you can invoke compiler the easy way

  sample stdout from ndk-build

  —
  originally used ubuntu 12.04 inside vmplayer on windows vista. IMO linux is better for builds than cygwin.

  I follow these instructions getting a indeterminant outcome in which the following conditions exist.

  build_android.sh seems to exit normally
  config.log has error where confirming gcc from crosstoolchain
  all the static libs are built ok
  (./libavfilter, ./libavcodec etc )
  ffmpeg.o is there and executes ok
  no ./android directory as per the prefix setting to config

  it looks like i can just push the binaries to my phone and test in a shell. If that’s ok then i can look to a jni wrapper for the static libs.

  But why didn’t the build write anything to —prefix=./android/armv7-a ??
  that path does not exist at the conclusion of the build

  Details :

  config log what was processed :

  FFMPEG_CONFIGURATION='--target-os=linux --prefix=./android/armv7-a 
  
  --enable-libvpx --enable-libvorbis --enable-pthreads --logfile=config.log
  
  --enable-cross-compile --extra-libs=-lgcc --arch=arm 
  
  --cc=/home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc 
  
  --cross-prefix=/home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi- 
  
  --nm=/home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-nm 
  
  --sysroot=/home/rob/src/android-ndk-r8/platforms/android-14/arch-arm/ --extra-cflags='"'"' -O3 -fpic 
  
  -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums 
  
  -fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp  -marm -march=armv7-a -mtune=cortex-a9 '"'"' 
  
  --disable-shared --enable-static --extra-ldflags='"'"'
  
  -Wl,-rpath-link=/home/rob/src/android-ndk-r8/platforms/android-14/arch-arm//usr/lib -L/home/rob/src/android-ndk-r8/platforms/android-14/arch-arm//usr/lib 
  
  -nostdlib -lc -lm -ldl -llog'"'"' 
  
  --disable-everything --enable-demuxer=mov --enable-demuxer=h264 
  
  --disable-ffplay --enable-protocol=file 
  
  --enable-avformat --enable-avcodec --enable-decoder=rawvideo 
  
  --enable-decoder=mjpeg --enable-decoder=h263 --enable-decoder=mpeg4 
  
  --enable-decoder=h264 --enable-parser=h264 --disable-network --enable-zlib --disable-avfilter --disable-avdevice'

  tail of config log contains error on compiler check

  zmbv_test='yes'
  
  zmbv_test_deps='zlib'
  
  WARNING: /home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-pkg-config not found, library detection may fail.
  
  mktemp -u XXXXXX
  
  Yd2A0h
  
  WARNING: Unknown C compiler /home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc, unable to select optimal CFLAGS
  
  check_ld cc
  
  check_cc
  
  BEGIN /tmp/ffconf.m9Kg3cqt.c
  
      1   int main(void){ return 0; }
  
  END /tmp/ffconf.m9Kg3cqt.c
  
  /home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp -marm -march=armv7-a -mtune=cortex-a9 -c -o /tmp/ffconf.tO2EIBz5.o /tmp/ffconf.m9Kg3cqt.c
  
  ./configure: 640: ./configure: /home/rob/src/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc: not found
  
  C compiler test failed.

  tail of build_android.sh stdout looks OK

  libavutil/opt.c: In function ‘av_find_opt’:
  
  libavutil/opt.c:41:5: warning: ‘av_next_option’ is deprecated (declared at libavutil/opt.h:347) [-Wdeprecated-declarations]
  
  CC  libavutil/pixdesc.o
  
  libavutil/opt.c: In function ‘av_opt_set_defaults’:
  
  libavutil/opt.c:601:5: warning: ‘av_opt_set_defaults2’ is deprecated (declared at libavutil/opt.h:370) [-Wdeprecated-declarations]
  
  CC  libavutil/random_seed.o
  
  CC  libavutil/rational.o
  
  CC  libavutil/rc4.o
  
  CC  libavutil/samplefmt.o
  
  CC  libavutil/sha.o
  
  CC  libavutil/timecode.o
  
  CC  libavutil/tree.o
  
  CC  libavutil/utils.o
  
  CC  libavutil/x86/cpu.o
  
  INSTALL libavdevice/avdevice.h
  
  INSTALL presets/libvpx-1080p50_60.ffpreset
  
  INSTALL presets/libvpx-1080p.ffpreset
  
  INSTALL presets/libvpx-360p.ffpreset
  
  INSTALL presets/libvpx-720p50_60.ffpreset
  
  INSTALL presets/libvpx-720p.ffpreset
  
  INSTALL presets/libx264-ipod320.ffpreset
  
  INSTALL presets/libx264-ipod640.ffpreset
  
  INSTALL doc/ffprobe.xsd
  
  INSTALL libavdevice/libavdevice.pc
  
  INSTALL libavfilter/asrc_abuffer.h
  
  INSTALL libavfilter/avcodec.h
  
  INSTALL libavfilter/avfilter.h
  
  INSTALL libavfilter/avfiltergraph.h
  
  INSTALL libavfilter/buffersink.h
  
  INSTALL libavfilter/version.h
  
  INSTALL libavfilter/vsrc_buffer.h
  
  INSTALL libavfilter/libavfilter.pc
  
  INSTALL libavformat/avformat.h
  
  INSTALL libavformat/avio.h
  
  INSTALL libavformat/version.h
  
  INSTALL libavformat/libavformat.pc
  
  INSTALL libavresample/avresample.h
  
  INSTALL libavresample/version.h
  
  INSTALL libavresample/libavresample.pc
  
  INSTALL libavcodec/avcodec.h
  
  INSTALL libavcodec/avfft.h
  
  INSTALL libavcodec/dxva2.h
  
  INSTALL libavcodec/vaapi.h
  
  INSTALL libavcodec/vda.h
  
  INSTALL libavcodec/vdpau.h
  
  INSTALL libavcodec/version.h
  
  INSTALL libavcodec/xvmc.h
  
  INSTALL libavcodec/libavcodec.pc
  
  INSTALL libswresample/libswresample.pc
  
  INSTALL libswresample/swresample.h
  
  INSTALL libswscale/swscale.h
  
  INSTALL libswscale/libswscale.pc
  
  INSTALL libavutil/adler32.h
  
  INSTALL libavutil/aes.h
  
  INSTALL libavutil/attributes.h
  
  INSTALL libavutil/audio_fifo.h
  
  INSTALL libavutil/audioconvert.h
  
  INSTALL libavutil/avassert.h
  
  INSTALL libavutil/avstring.h
  
  INSTALL libavutil/avutil.h
  
  INSTALL libavutil/base64.h
  
  INSTALL libavutil/bprint.h
  
  INSTALL libavutil/bswap.h
  
  INSTALL libavutil/common.h
  
  INSTALL libavutil/cpu.h
  
  INSTALL libavutil/crc.h
  
  INSTALL libavutil/error.h
  
  INSTALL libavutil/eval.h
  
  INSTALL libavutil/fifo.h
  
  INSTALL libavutil/file.h
  
  INSTALL libavutil/imgutils.h
  
  INSTALL libavutil/intfloat.h
  
  INSTALL libavutil/intfloat_readwrite.h
  
  INSTALL libavutil/intreadwrite.h
  
  INSTALL libavutil/lfg.h
  
  INSTALL libavutil/log.h
  
  INSTALL libavutil/lzo.h
  
  INSTALL libavutil/mathematics.h
  
  INSTALL libavutil/md5.h
  
  INSTALL libavutil/mem.h
  
  INSTALL libavutil/dict.h
  
  INSTALL libavutil/opt.h
  
  INSTALL libavutil/parseutils.h
  
  INSTALL libavutil/pixdesc.h
  
  INSTALL libavutil/pixfmt.h
  
  INSTALL libavutil/random_seed.h
  
  INSTALL libavutil/rational.h
  
  INSTALL libavutil/samplefmt.h
  
  INSTALL libavutil/sha.h
  
  INSTALL libavutil/timecode.h
  
  INSTALL libavutil/timestamp.h
  
  INSTALL libavutil/avconfig.h
  
  INSTALL libavutil/libavutil.pc
  
  AR  libavdevice/libavdevice.a
  
  AR  libavfilter/libavfilter.a
  
  AR  libavformat/libavformat.a
  
  AR  libavresample/libavresample.a
  
  AR  libavcodec/libavcodec.a
  
  AR  libswresample/libswresample.a
  
  AR  libswscale/libswscale.a
  
  AR  libavutil/libavutil.a
  
  INSTALL libavdevice/libavdevice.a
  
  INSTALL libavfilter/libavfilter.a
  
  INSTALL libavresample/libavresample.a
  
  INSTALL libswresample/libswresample.a
  
  INSTALL libswscale/libswscale.a
  
  INSTALL libavutil/libavutil.a
  
  INSTALL libavformat/libavformat.a
  
  LD  ffmpeg_g
  
  INSTALL libavcodec/libavcodec.a
  
  CP  ffmpeg
  
  STRIP   ffmpeg
  
  INSTALL install-progs-yes
  
  INSTALL ffmpeg

• AAC decoding on android too slow

  18 juillet 2012, par Ali

  I am using ffmpeg to decode AAC stream on android device. but it consumes > 90% CPU and i am not able to play on slow devices. Any suggestions ? Other option is OpenCore AAC decoder which uses very less CPU but in my project i am using ffmpeg for decoding other formats as well.. So it would be good if i am able to decode aac with ffmpeg as well.

  Any recommendations ?

• Transcoding Mp4 video on Android with FFMPEG

  18 octobre 2012, par geeknizer

  I've compiled FFMPEG binary from Bambuser project (refer question) and have pushed binary and .so files to application directory.

  But when I try running FFMPEG with input file, it always complains file not found.

  1|root@android:/data/data/com.bambuser.broadcaster # ls                        
  
  cache           libavcodec.so   libavfilter.so  libswscale.so
  
  ffmpeg          libavcore.so    libavformat.so  tutorial.mp4
  
  lib             libavdevice.so  libavutil.so
  
  1|root@android:/data/data/com.bambuser.broadcaster # ./ffmpeg -i tutorial.mp4 out.mp4                                                              
  
  FFmpeg version UNKNOWN, Copyright (c) 2000-2010 the FFmpeg developers
  
    built on May  8 2012 10:11:37 with gcc 4.4.3
  
    configuration: --target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --sysroot=/home/tarandeep/tools/android-ndk/platforms/android-3/arch-arm --soname-prefix=/data/data/com.bambuser.broadcaster/lib/ --enable-shared --disable-symver --enable-small --optimization-flags=-O2 --disable-everything --enable-encoder=mpeg2video --enable-encoder=nellymoser --prefix=../build/ffmpeg/armeabi-v7a --extra-cflags='-march=armv7-a -mfloat-abi=softfp' --extra-ldflags=
  
    libavutil     50.34. 0 / 50.34. 0
  
    libavcore      0.16. 0 /  0.16. 0
  
    libavcodec    52.99. 1 / 52.99. 1
  
    libavformat   52.88. 0 / 52.88. 0
  
    libavdevice   52. 2. 2 / 52. 2. 2
  
    libavfilter    1.69. 0 /  1.69. 0
  
    libswscale     0.12. 0 /  0.12. 0
  
  tutorial.mp4: No such file or directory

  I've tried placing file in /sdcard and other locations, I always get same output