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• Build FFMPEG under Cygwin in Windows OS for Android

  8 juin 2017, par Jun Kim

  For the past couple days, I have been trying hard to build FFMPEG for a Android project on Windows Operating System using android-ndk-14d using Cygwin.
  I have followed many tutorials out there, and I ahve encountered so many errors while building FFMPEG using build_android.sh.

  Here are the steps that I have taken so far.

  I downloaded Cygwin and configured all the dependencies that I need for building FFMPEG.

  I opened ffmpeg-3.3.1/configure file with a text editor, and changed to the following lines.

  SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
  
  LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
  
  SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
  
  SLIB_INSTALL_LINKS='$(SLIBNAME)'

  my build_android.sh is as below

  #!/bin/bash
  
  NDK=C:/~/ndk-bundle
  
  SYSROOT=$NDK/platforms/android-21/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64
  
  function build_one
  
  {
  
  ./configure \
  
      --prefix=$PREFIX \
  
      --enable-shared \
  
      --disable-static \
  
      --disable-doc \
  
      --disable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffprobe \
  
      --disable-ffserver \
  
      --disable-avdevice \
  
      --disable-doc \
  
      --disable-symver \
  
      --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi-\
  
      --target-os=android \
  
      --arch=arm \
  
      --cpu=armv7-a \
  
      --enable-cross-compile \
  
      --sysroot=$SYSROOT \
  
      --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
      --extra-ldflags="$ADDI_LDFLAGS" \
  
      $ADDITIONAL_CONFIGURE_FLAG
  
  make clean
  
  make
  
  make install
  
  }
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU
  
  ADDI_CFLAGS="-marm"
  
  build_one

  I ran these commands

  dos2unix build_android.sh 
  
  chmod +x build_android.sh
  
  ./build_android.sh

  and,,,currently getting this error

  c :/users/sonic/appdata/local/android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/p
  rebuilt/windows-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-an
  droideabi/bin/ld.exe : error : libavutil/libavutil.so:1:1 : syntax error,
  unexpected ’ !’, exp ecting $end

  c :/users/sonic/appdata/local/android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/p
  rebuilt/windows-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-an
  droideabi/bin/ld.exe : error : libavutil/libavutil.so : not an object or
  archive collect2.exe : error : ld returned 1 exit status
  make : *** [library.mak:94 : libswscale/libswscale-4.so] Error 1 LD

  libswscale/libswscale-4.so
  c :/users/sonic/appdata/local/android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/p
  rebuilt/windows-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-an
  droideabi/bin/ld.exe : error : libavutil/libavutil.so:1:1 : syntax error,
  unexpected ’ !’, exp ecting $end

  c :/users/sonic/appdata/local/android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/p
  rebuilt/windows-x86_64/bin/../lib/gcc/arm-linux->androideabi/4.9.x/../../../../arm-linux-an
  droideabi/bin/ld.exe : error : libavutil/libavutil.so : not an object or
  archive collect2.exe : error : ld returned 1 exit status make : ***
  [library.mak:94 : libswscale/libswscale-4.so] Error 1

  How to compile ffmpeg-2.5.3 on windows with android-ndk-r10d

  From the comments that were commented on the above link, it seems like it is
  easier to build FFMPEG in Linux/Unix OS. My first can be a dumb question. But If there is anyone who can guide me through this, i will be really appreciated it.

  If I build FFMPEG on Linux for Android, could I possibly copy or move those
  resulted output (The arm/lib folder contains the shared libraries, while arm/include folder contains the header files for libavcodec, libavformat, libavfilter, libavutil, libswscale etc.) to Windows OS and utilize them for
  my Android project ?

  Since my company only provides Windows OS for a project, I have to utilize them on Windows OS.

  Thank you for your time, and if there is any feedback that you can provide it will definitely be helpful.

  For the reference, here is my config.log

  END c :/ffmpegtmp/ffconf.qoBF6X98.c
  C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc —sysroot=C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/platforms/android-9/arch-arm/

  -isysroot C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/platforms/android-9/arch-arm/
  -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -Os -fpic -marm -march=armv7-a -std=c11 -fomit-frame-pointer -fPIC -marm -pthread -g -Wdeclaration-after-statement -Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -O3 -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-security -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=return-type -Werror=vla -Wformat -c -o c :/ffmpegtmp/ffconf.8joa74tC.o

  c :/ffmpegtmp/ffconf.qoBF6X98.c
  check_cflags -fdiagnostics-color=auto test_cflags
  -fdiagnostics-color=auto check_cc -fdiagnostics-color=auto BEGIN c :/ffmpegtmp/ffconf.qoBF6X98.c
  1 int x ; END c :/ffmpegtmp/ffconf.qoBF6X98.c C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc —sysroot=C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/platforms/android-9/arch-arm/

  -isysroot C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/platforms/android-9/arch-arm/
  -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -Os -fpic -marm -march=armv7-a -std=c11 -fomit-frame-pointer -fPIC -marm -pthread -g -Wdeclaration-after-statement -Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -O3 -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-security -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto -c -o c :/ffmpegtmp/ffconf.8joa74tC.o c :/ffmpegtmp/ffconf.qoBF6X98.c test_cflags -Wmaybe-uninitialized check_cc -Wmaybe-uninitialized BEGIN

  c :/ffmpegtmp/ffconf.qoBF6X98.c
  1 int x ; END c :/ffmpegtmp/ffconf.qoBF6X98.c C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc —sysroot=C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/platforms/android-9/arch-arm/

  -isysroot C :/Users/sonic/AppData/Local/Android/sdk/ndk-bundle/platforms/android-9/arch-arm/
  -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Dstrtod=avpriv_strtod -DPIC -Os -fpic -marm -march=armv7-a -std=c11 -fomit-frame-pointer -fPIC -marm -pthread -g -Wdeclaration-after-statement -Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -O3 -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-security -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto -Wmaybe-uninitialized -c -o c :/ffmpegtmp/ffconf.8joa74tC.o c :/ffmpegtmp/ffconf.qoBF6X98.c

• encoding with ffmpeg libx265 -pix_fmt gray gives unplayable vid

  9 juin 2017, par netjiro

  What am I missing ?
  I encode an old black and white film clip with ffmpeg libx265 passing -pix_fmt gray. The output is unplayable in both vlc and mplayer (linux), so I assume I’m missing something...

  encoding :

  ffmpeg -i clip.mkv \
  
      -c:v libx265 -preset slow -x265-params "crf=24" -pix_fmt gray \
  
      -c:a libopus -b:a 64k \
  
      -c:s copy \
  
      out.mkv

  vlc errors :

  [00007f8a3ddfe328] blend blend error: no matching alpha blending routine (chroma: RGBA -> GREY)
  
  [00007f8a3ddfe328] core blend error: blending RGBA to GREY failed
  
  ... repeated ...

  mplayer errors :

  Unexpected decoder output format Planar Y800
  
  ... repeated ...

  ffmpeg encoding output :

  ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.9.4 (Gentoo 4.9.4 p1.0, pie-0.6.4)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-3.2.4/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-march=native -O2 -pipe' --disable-static --enable-avfilter --enable-avresample --disable-stripping --enable-nonfree --enable-version3 --disable-indev=oss --disable-indev=jack --disable-outdev=oss --enable-version3 --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --disable-gnutls --disable-gmp --enable-gpl --enable-hardcoded-tables --enable-iconv --enable-lzma --enable-network --enable-openssl --enable-postproc --disable-libsmbclient --enable-ffplay --enable-sdl2 --enable-vaapi --enable-vdpau --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --enable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --enable-openal --enable-opengl --enable-libv4l2 --disable-libpulse --enable-libopencore-amrwb --enable-libopencore-amrnb --disable-libfdk-aac --enable-libopenjpeg --enable-libbluray --enable-libcelt --disable-libgme --disable-libgsm --disable-mmal --enable-libmodplug --enable-libopus --disable-libilbc --disable-librtmp --enable-libssh --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libvpx --disable-libzvbi --disable-libbs2b --disable-chromaprint --disable-libebur128 --disable-libflite --disable-frei0r --disable-libfribidi --enable-fontconfig --disable-ladspa --disable-libass --enable-libfreetype --disable-librubberband --disable-libzimg --enable-libsoxr --enable-pthreads --enable-libvo-amrwbenc --enable-libmp3lame --disable-libkvazaar --disable-nvenc --disable-libopenh264 --enable-libsnappy --enable-libtheora --enable-libtwolame --enable-libwavpack --disable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=host --disable-doc --disable-htmlpages --enable-manpages
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  x265 [info]: HEVC encoder version 2.2
  
  x265 [info]: build info [Linux][GCC 4.9.4][64 bit] 8bit+10bit+12bit
  
  x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  
  x265 [info]: Unknown profile, Level-3.1 (Main tier)
  
  x265 [warning]: No thread pool allocated, --wpp disabled
  
  x265 [warning]: No thread pool allocated, --lookahead-slices disabled
  
  x265 [info]: Slices                              : 1
  
  x265 [info]: frame threads / pool features       : 3 / none
  
  x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
  
  x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
  
  x265 [info]: ME / range / subpel / merge         : star / 57 / 3 / 3
  
  x265 [info]: Keyframe min / max / scenecut / bias: 23 / 250 / 40 / 5.00
  
  x265 [info]: Lookahead / bframes / badapt        : 25 / 4 / 2
  
  x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
  
  x265 [info]: References / ref-limit  cu / depth  : 4 / on / on
  
  x265 [info]: AQ: mode / str / qg-size / cu-tree  : 1 / 1.0 / 32 / 1
  
  x265 [info]: Rate Control / qCompress            : CRF-24.0 / 0.60
  
  x265 [info]: tools: rect limit-modes rd=4 psy-rd=2.00 rdoq=2 psy-rdoq=1.00
  
  x265 [info]: tools: rskip signhide tmvp strong-intra-smoothing deblock sao
  
  Output #0, matroska, to 'out.mkv':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Metadata:
  
      Stream #0:0(eng): Video: hevc (libx265), gray, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 1k tbn, 23.98 tbc (default)
  
      Metadata:
  
        encoder         : Lavc57.64.101 libx265
  
      Stream #0:1(eng): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, stereo, flt, 64 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc57.64.101 libopus
  
      Stream #0:2(eng): Subtitle: subrip (default)
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
  
    Stream #0:1 -> #0:1 (eac3 (native) -> opus (libopus))
  
    Stream #0:3 -> #0:2 (copy)
  
  Press [q] to stop, [?] for help
  
  frame= 1439 fps=7.0 q=-0.0 Lsize=    5356kB time=00:01:00.01 bitrate= 731.1kbits/s speed=0.294x    
  
  video:4940kB audio:382kB subtitle:1kB other streams:0kB global headers:2kB muxing overhead: 0.629434%
  
  x265 [info]: frame I:      9, Avg QP:22.27  kb/s: 6064.82 
  
  x265 [info]: frame P:    340, Avg QP:23.62  kb/s: 1950.21 
  
  x265 [info]: frame B:   1090, Avg QP:29.65  kb/s: 230.75  
  
  x265 [info]: Weighted P-Frames: Y:0.9% UV:0.0%
  
  x265 [info]: consecutive B-frames: 2.9% 0.3% 1.4% 72.5% 22.9% 

• FFMPeg stuck while processing a video

  15 juin 2017, par Muhammad Umar

  I am trying to add slow motion to an FFMPEG video in android

  On my terminal original query i use is

  ffmpeg -i soon.mp4 -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" output.mp4

  Here is my code in android,

      String cmd = "/data/data/PACKAGE_NAME/files/ffmpeg -i "+ videoFileName +" -filter_complex [0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a] -map [v] -map [a] " + file.getAbsolutePath();

  In Android , i have only removed quotation marks since ffmpeg is not recognising these.

  When i exceute FFMPEG,
  following happens

  configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/i686-linux-android- --arch=x86 --cpu=i686 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --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=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/x86 --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -march=i686' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  06-15 22:07:01.340 11866-11866/PACKAGE_NAME D/WRITING::   libavutil      55. 17.103 / 55. 17.103
  
  06-15 22:07:01.720 11866-11866/PACKAGE_NAME D/WRITING::   libavcodec     57. 24.102 / 57. 24.102
  
  06-15 22:07:02.100 11866-11866/PACKAGE_NAME D/WRITING::   libavformat    57. 25.100 / 57. 25.100
  
  06-15 22:07:02.510 11866-11866/PACKAGE_NAME D/WRITING::   libavdevice    57.  0.101 / 57.  0.101
  
  06-15 22:07:02.900 11866-11866/PACKAGE_NAME D/WRITING::   libavfilter     6. 31.100 /  6. 31.100
  
  06-15 22:07:03.290 11866-11866/PACKAGE_NAME D/WRITING::   libswscale      4.  0.100 /  4.  0.100
  
  06-15 22:07:03.620 11866-11866/PACKAGE_NAME D/WRITING::   libswresample   2.  0.101 /  2.  0.101
  
  06-15 22:07:03.980 11866-11866/PACKAGE_NAME D/WRITING::   libpostproc    54.  0.100 / 54.  0.100
  
  06-15 22:07:04.320 11866-11866/PACKAGE_NAME D/WRITING:: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/Camera/V_20170204_181009.mp4':
  
  06-15 22:07:04.720 11866-11866/PACKAGE_NAME D/WRITING::   Metadata:
  
  06-15 22:07:05.050 11866-11866/PACKAGE_NAME D/WRITING::     major_brand     : isom
  
  06-15 22:07:05.450 11866-11866/PACKAGE_NAME D/WRITING::     minor_version   : 0
  
  06-15 22:07:05.860 11866-11866/PACKAGE_NAME D/WRITING::     compatible_brands: isom3gp4
  
  06-15 22:07:05.870 230-230/? E/ia_watchdog: Refreshing Watchdog Timers
  
  06-15 22:07:06.240 11866-11866/PACKAGE_NAME D/WRITING::     creation_time   : 2017-02-04 13:10:13
  
  06-15 22:07:06.850 11866-11866/PACKAGE_NAME D/WRITING::   Duration: 00:00:02.82, start: 0.000000, bitrate: 12760 kb/s
  
  06-15 22:07:07.240 11866-11866/PACKAGE_NAME D/WRITING::     Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 12344 kb/s, SAR 1:1 DAR 16:9, 24.19 fps, 23.92 tbr, 90k tbn, 60 tbc (default)
  
  06-15 22:07:07.620 11866-11866/PACKAGE_NAME D/WRITING::     Metadata:
  
  06-15 22:07:07.990 11866-11866/PACKAGE_NAME D/WRITING::       rotate          : 90
  
  06-15 22:07:08.400 11866-11866/PACKAGE_NAME D/WRITING::       creation_time   : 2017-02-04 13:10:13
  
  06-15 22:07:08.870 11866-11866/PACKAGE_NAME D/WRITING::       handler_name    : VideoHandle
  
  06-15 22:07:09.880 11866-11866/PACKAGE_NAME D/WRITING::     Side data:
  
  06-15 22:07:10.530 11866-11866/PACKAGE_NAME D/WRITING::       displaymatrix: rotation of -90.00 degrees
  
  06-15 22:07:11.000 11866-11866/PACKAGE_NAME D/WRITING::     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 191 kb/s (default)
  
  06-15 22:07:11.530 11866-11866/PACKAGE_NAME D/WRITING::     Metadata:
  
  06-15 22:07:12.120 11866-11866/PACKAGE_NAME D/WRITING::       creation_time   : 2017-02-04 13:10:13
  
  06-15 22:07:12.620 11866-11866/PACKAGE_NAME D/WRITING::       handler_name    : SoundHandle

  After that nothing happens, FFMPEG seems like stuck in oblivion. Any ideas what could be wrong