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• How do i fix library issues while compiling static ffmpeg for android ?

  25 mars 2022, par TheRandomGuyNamedJoe12

  Output from terminal :
`android-build-tools/bin/arm-linux-androideabi-clang is unable to create an executable file.
C compiler test failed.

  


  If you think configure made a mistake, make sure you are using the latest
version from Git. If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.libera.chat.
Include the log file "ffbuild/config.log" produced by configure as this will help
solve the problem.What the problems are (from the log):ld : error : unable to find library -lgnustl_static
ld : error : unable to find library -lpng
ld : error : unable to find library -lpthread
clang120 : error : linker command failed with exit code 1 (use -v to see invocation)
C compiler test failed.`
Even tho the library is installed

  


  I have tried to change clang to gcc it didn't fix the problem.

  


• Compiling static libs of ffmpeg with x264 in Msys2 for Visual Studio, but libx264 is never found

  29 mai 2020, par Blake Senftner

  Having previously downloaded and compiled ffmpeg 4.2.2 to static libraries using MSYS2 and the Visual Studio 2015 x64 tool chain. I want to add the x264 codec from VLC/VideoLan, compiling that to a static library as well. However, running Configure for ffmpeg produces an error saying "libx264 not found."

  



  I built ffmpeg without VideoLAN's x264 at "/c/ThirdParty/opt/ffmpeg-4.2.2" with "make install" installing to "/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build" .

  



  I am using the following steps to compile from source x264 and add it to the ffmpeg build using the same VS2015 tool chain :

  



  

  1. Launch an "VS2015 x64 Natice Tools Command Prompt"

  


  2. From that VS2015 command prompt, run "c :\msys64\msys2_shell.cmd -mingw64 -use-full-path"

  


  3. From inside the MSYS2 shell, run "cd /c/ThirdParty/opt"

  


  4. git clone http://git.videolan.org/git/x264.git

  


  5. cd x264

  


  6. CC=cl ./configure —enable-static —prefix=/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build —disable-cli

  


  7. make

  


  8. make install

  


  9. cd ../ffmpeg-4.2.2

  


  10. PKG_CONFIG_PATH=/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build/lib \
./configure —prefix=./ffmpeg_build —toolchain=msvc —arch=x86_64 \
—target-os=win64 —extra-cflags=-MT —extra-cxxflags=-MT \
—extra-ldflags=-L/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build/lib \
—enable-x86asm —enable-asm —enable-static —disable-shared \
—disable-debug —enable-gpl —enable-avresample —enable-libx264

  


  



  The steps work, compiling x264 fine, but the output for ffmpeg's Configure is "ERROR : libx264 not found".

  



  I have also tried the variation of using these two lines in place of steps 6 and 10 above :

  



  

  • CC=cl ./configure —enable-static —prefix=/usr/local —disable-cli

  


  • PKG_CONFIG_PATH=/usr/local/lib/pkgconfig :$PKG_CONFIG_PATH ./configure —prefix=./ffmpeg_build —toolchain=msvc —arch=x86_64 —target-os=win64 —extra-cflags=-MT —extra-libs=/usr/local/lib/libx264.lib —extra-cxxflags=-MT —enable-x86asm —enable-asm —enable-static —disable-shared —disable-debug —enable-gpl —enable-avresample —enable-libx264

  


  



  This version will get past Configure, where I am able to run "make", but the make fails with a series of unresolved X264_* functions while linking ffmpeg_g.exe, 14 unresolved functions in total. The errors at shown at the bottom, but first :

  



  When I look in /c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build/lib I see :

  



  $ ls -l ./ffmpeg_build/lib
total 50988
-rw-r--r-- 1 blake blake 27184250 May 11 16:29 libavcodec.a
-rw-r--r-- 1 blake blake   231304 May 11 16:29 libavdevice.a
-rw-r--r-- 1 blake blake  8574628 May 11 16:29 libavfilter.a
-rw-r--r-- 1 blake blake  8081930 May 11 16:29 libavformat.a
-rw-r--r-- 1 blake blake  1300118 May 11 16:29 libavutil.a
-rw-r--r-- 1 blake blake    61844 May 11 16:29 libpostproc.a
-rw-r--r-- 1 blake blake   348732 May 11 16:29 libswresample.a
-rw-r--r-- 1 blake blake  1316008 May 11 16:29 libswscale.a
-rw-r--r-- 1 blake blake  5086976 May 28 18:08 libx264.lib
drwxr-xr-x 1 blake blake        0 May 28 18:08 pkgconfig


  



  Likewise for /c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build/lib/pkgconfig :

  



  $ ls -l ./ffmpeg_build/lib/pkgconfig/
total 9
-rw-r--r-- 1 blake blake 353 May 11 16:29 libavcodec.pc
-rw-r--r-- 1 blake blake 554 May 11 16:29 libavdevice.pc
-rw-r--r-- 1 blake blake 449 May 11 16:29 libavfilter.pc
-rw-r--r-- 1 blake blake 393 May 11 16:29 libavformat.pc
-rw-r--r-- 1 blake blake 306 May 11 16:29 libavutil.pc
-rw-r--r-- 1 blake blake 317 May 11 16:29 libpostproc.pc
-rw-r--r-- 1 blake blake 322 May 11 16:29 libswresample.pc
-rw-r--r-- 1 blake blake 315 May 11 16:29 libswscale.pc
-rw-r--r-- 1 blake blake 300 May 28 18:08 x264.pc


  



  And looking in /usr/local/lib I see libx264.lib and the pkgconfig directory.

  



  The errors generated by my most recent attempts look like :

  



  LD      ffmpeg_g.exe
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_default referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_parse referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_default_preset referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_apply_fastfirstpass referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_apply_profile referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_picture_init referenced in function X264_frame
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_open_160 referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_reconfig referenced in function reconfig_encoder
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_headers referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_encode referenced in function X264_frame
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_close referenced in function X264_close
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_delayed_frames referenced in function X264_frame
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_maximum_delayed_frames referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_levels referenced in function X264_init
ffmpeg_g.exe : fatal error LNK1120: 14 unresolved externals
make: *** [Makefile:111: ffmpeg_g.exe] Error 96


  



  Maybe something wrong with the —extra-ldflags or —extra-libs options of ffmpeg's Configure, but after trying variations and google searching, I come asking you. Do you know what is wrong with this ffmpeg Configure line ? Step 10, above.

  


• Compiling static libs of ffmpeg with x264 in Msys2 for Visual Studio, but libx264 is never found

  29 mai 2020, par Blake Senftner

  Having previously downloaded and compiled ffmpeg 4.2.2 to static libraries using MSYS2 and the Visual Studio 2015 x64 tool chain. I want to add the x264 codec from VLC/VideoLan, compiling that to a static library as well. However, running Configure for ffmpeg produces an error saying "libx264 not found."

  



  I built ffmpeg without VideoLAN's x264 at "/c/ThirdParty/opt/ffmpeg-4.2.2" with "make install" installing to "/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build" .

  



  I am using the following steps to compile from source x264 and add it to the ffmpeg build using the same VS2015 tool chain :

  



  

  1. Launch an "VS2015 x64 Natice Tools Command Prompt"

  


  2. From that VS2015 command prompt, run "c :\msys64\msys2_shell.cmd -mingw64 -use-full-path"

  


  3. From inside the MSYS2 shell, run "cd /c/ThirdParty/opt"

  


  4. git clone http://git.videolan.org/git/x264.git

  


  5. cd x264

  


  6. CC=cl ./configure —enable-static —prefix=/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build —disable-cli

  


  7. make

  


  8. make install

  


  9. cd ../ffmpeg-4.2.2

  


  10. PKG_CONFIG_PATH=/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build/lib \
./configure —prefix=./ffmpeg_build —toolchain=msvc —arch=x86_64 \
—target-os=win64 —extra-cflags=-MT —extra-cxxflags=-MT \
—extra-ldflags=-L/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build/lib \
—enable-x86asm —enable-asm —enable-static —disable-shared \
—disable-debug —enable-gpl —enable-avresample —enable-libx264

  


  



  The steps work, compiling x264 fine, but the output for ffmpeg's Configure is "ERROR : libx264 not found".

  



  I have also tried the variation of using these two lines in place of steps 6 and 10 above :

  



  

  • CC=cl ./configure —enable-static —prefix=/usr/local —disable-cli

  


  • PKG_CONFIG_PATH=/usr/local/lib/pkgconfig :$PKG_CONFIG_PATH ./configure —prefix=./ffmpeg_build —toolchain=msvc —arch=x86_64 —target-os=win64 —extra-cflags=-MT —extra-libs=/usr/local/lib/libx264.lib —extra-cxxflags=-MT —enable-x86asm —enable-asm —enable-static —disable-shared —disable-debug —enable-gpl —enable-avresample —enable-libx264

  


  



  This version will get past Configure, where I am able to run "make", but the make fails with a series of unresolved X264_* functions while linking ffmpeg_g.exe, 14 unresolved functions in total. The errors at shown at the bottom, but first :

  



  When I look in /c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build/lib I see :

  



  $ ls -l ./ffmpeg_build/lib
total 50988
-rw-r--r-- 1 blake blake 27184250 May 11 16:29 libavcodec.a
-rw-r--r-- 1 blake blake   231304 May 11 16:29 libavdevice.a
-rw-r--r-- 1 blake blake  8574628 May 11 16:29 libavfilter.a
-rw-r--r-- 1 blake blake  8081930 May 11 16:29 libavformat.a
-rw-r--r-- 1 blake blake  1300118 May 11 16:29 libavutil.a
-rw-r--r-- 1 blake blake    61844 May 11 16:29 libpostproc.a
-rw-r--r-- 1 blake blake   348732 May 11 16:29 libswresample.a
-rw-r--r-- 1 blake blake  1316008 May 11 16:29 libswscale.a
-rw-r--r-- 1 blake blake  5086976 May 28 18:08 libx264.lib
drwxr-xr-x 1 blake blake        0 May 28 18:08 pkgconfig


  



  Likewise for /c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build/lib/pkgconfig :

  



  $ ls -l ./ffmpeg_build/lib/pkgconfig/
total 9
-rw-r--r-- 1 blake blake 353 May 11 16:29 libavcodec.pc
-rw-r--r-- 1 blake blake 554 May 11 16:29 libavdevice.pc
-rw-r--r-- 1 blake blake 449 May 11 16:29 libavfilter.pc
-rw-r--r-- 1 blake blake 393 May 11 16:29 libavformat.pc
-rw-r--r-- 1 blake blake 306 May 11 16:29 libavutil.pc
-rw-r--r-- 1 blake blake 317 May 11 16:29 libpostproc.pc
-rw-r--r-- 1 blake blake 322 May 11 16:29 libswresample.pc
-rw-r--r-- 1 blake blake 315 May 11 16:29 libswscale.pc
-rw-r--r-- 1 blake blake 300 May 28 18:08 x264.pc


  



  And looking in /usr/local/lib I see libx264.lib and the pkgconfig directory.

  



  The errors generated by my most recent attempts look like :

  



  LD      ffmpeg_g.exe
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_default referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_parse referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_default_preset referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_apply_fastfirstpass referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_param_apply_profile referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_picture_init referenced in function X264_frame
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_open_160 referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_reconfig referenced in function reconfig_encoder
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_headers referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_encode referenced in function X264_frame
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_close referenced in function X264_close
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_delayed_frames referenced in function X264_frame
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_encoder_maximum_delayed_frames referenced in function X264_init
libavcodec.a(libx264.o) : error LNK2019: unresolved external symbol __imp_x264_levels referenced in function X264_init
ffmpeg_g.exe : fatal error LNK1120: 14 unresolved externals
make: *** [Makefile:111: ffmpeg_g.exe] Error 96


  



  Maybe something wrong with the —extra-ldflags or —extra-libs options of ffmpeg's Configure, but after trying variations and google searching, I come asking you. Do you know what is wrong with this ffmpeg Configure line ? Step 10, above.