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• fftools/ffmpeg : update text requesting samples

  10 mai 2020, par Andriy Gelman

  fftools/ffmpeg : update text requesting samples
  Signed-off-by : Andriy Gelman <andriy.gelman@gmail.com>
  
  Reviewed-by : Marton Balint <cus@passwd.hu>
  

  • [DH] doc/developer.texi
  • [DH] fftools/cmdutils.c
  • [DH] fftools/ffmpeg.c

• Mingw-w64 builded FFmpeg doesn't show any usage information

  26 octobre 2013, par user1240328

  First I wanted to modificate ffplay according to my requirments. Then I noticed that original ffplay from my build can't play some video files, but it didn't write any message to console. Then I noticed that ffmpeg also don't write any usage message when I run it without params. But it works. If I run it from terminal it's like running asynchronously ! The terminal just shows next row. I mean it asks for a next command. But the ffmpeg process is visible in task manager and it writes the output video file what I had requested !

  I created following souce file. I have modified the Makefile. So it have built the exe-file works just the same way. I have no idea how it can be.

  #include 
  
  #include "cmdutils.h"
  
  
  
  const char program_name[] = "hello";
  
  const int program_birth_year = 2013;
  
  
  
  void show_help_default(const char *opt, const char *arg)
  
  {
  
      printf("zxcvbnm\n");
  
  }
  
  
  
  int main(int argc, char **argv)
  
  {
  
      printf("1234567890\n");
  
      return 0;
  
  }

  I want to prevent this behavior.

  I want to make printf working in traditional manner.

  How I build FFmpeg :

  PKG_CONFIG_PATH=/home/developer/workspace/MinGW32fs/lib/pkgconfig/ \
  
  SDL_CONFIG=/home/developer/workspace/MinGW32fs/bin/sdl-config \
  
  ./configure \
  
    --prefix=/home/developer/workspace/MinGW32fs \
  
    --extra-ldflags="-L/home/developer/workspace/MinGW32fs/lib" \
  
    --extra-cflags="-I/home/developer/workspace/MinGW32fs/include" \
  
    --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32-  \
  
    --pkg-config=pkg-config   --enable-libtheora --enable-libvorbis --enable-libvpx \
  
    --enable-outdev=sdl --enable-shared --disable-static \
  
    --disable-doc --disable-manpages --disable-podpages
  
  
  
  make

• Complie FFMpeg with Xcode5 preview's clang

  2 août 2013, par Yeung

  With release of IOS7 beta, I would like to try compiling ffmpeg for ios7.

  There is a lots answer like this. It use the llvm-gcc as compiler.

  However, seem like Xcode 5 would not include llvm-gcc. Then I have no choice but to use clang to compile.

  I use the following to config :

  export IOS_SDK="/Applications/Xcode5-DP4.app/Contents/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk"
  
  
  
  ./configure $CONFIG_DISABLE_FLAG $CONFIG_ENABLE_FLAG \
  
  --arch=arm \
  
  --target-os=darwin \
  
  --cc=/Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang \
  
  --as='gas-preprocessor.pl /Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang' \
  
  --ar=/Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar  \
  
  --sysroot=$IOS_SDK \
  
  --cpu=cortex-a8 \
  
  --extra-cflags="-arch armv7 -mfpu=neon -mfloat-abi=softfp -ftree-vectorize -ffast-math -funsafe-math-optimizations -fsingle-precision-constant -isysroot ${IOS_SDK} -I${IOS_SDK}/usr/include" \
  
  --extra-ldflags="-arch armv7 -mfpu=neon -mfloat-abi=softfp -ftree-vectorize -ffast-math -funsafe-math-optimizations -fsingle-precision-constant -isysroot ${IOS_SDK} -L${IOS_SDK}/usr/lib" \
  
  --enable-pic 

  clang would probably not take CFLAGS other than -arch  -isysroot -I into account, but let it be.

  I seems it can complie but I encounter this. Actually, I don't understand the answer in this question. Using the external assembler ? Yes, the toolchains do have a assembler stated it is GNU version 1.38. Using --as=/Application/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/as, it even cannot pass the check as test. It fall back to use 'gas-preprocessor.pl $CC'

  Here is the config log to cannot pass :

      check_asm armv6t2 "movt r0, #0"
  
  check_as
  
  BEGIN /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
      1   void foo(void){ __asm__ volatile("movt r0, #0"); }
  
  END /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  /Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/as --sysroot=/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -arch armv7 -no-cpp-precomp -mfpu=neon -mfloat-abi=softfp -ftree-vectorize -ffast-math -funsafe-math-optimizations -fsingle-precision-constant -isysroot /Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -I/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/include -mcpu=cortex-a8 -fPIC -c -o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.g896h4Sb.o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  FATAL:/Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../libexec/as/arm/as: I don't understand '-' flag!
  
  check_asm armvfp "fadds s0, s0, s0"
  
  check_as
  
  BEGIN /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
      1   void foo(void){ __asm__ volatile("fadds s0, s0, s0"); }
  
  END /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  /Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/as --sysroot=/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -arch armv7 -no-cpp-precomp -mfpu=neon -mfloat-abi=softfp -ftree-vectorize -ffast-math -funsafe-math-optimizations -fsingle-precision-constant -isysroot /Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -I/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/include -mcpu=cortex-a8 -fPIC -c -o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.g896h4Sb.o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  FATAL:/Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../libexec/as/arm/as: I don't understand '-' flag!
  
  check_asm neon "vadd.i16 q0, q0, q0"
  
  check_as
  
  BEGIN /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
      1   void foo(void){ __asm__ volatile("vadd.i16 q0, q0, q0"); }
  
  END /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  /Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/as --sysroot=/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -arch armv7 -no-cpp-precomp -mfpu=neon -mfloat-abi=softfp -ftree-vectorize -ffast-math -funsafe-math-optimizations -fsingle-precision-constant -isysroot /Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -I/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/include -mcpu=cortex-a8 -fPIC -c -o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.g896h4Sb.o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  FATAL:/Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../libexec/as/arm/as: I don't understand '-' flag!
  
  check_asm vfpv3 "vmov.f32 s0, #1.0"
  
  check_as
  
  BEGIN /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
      1   void foo(void){ __asm__ volatile("vmov.f32 s0, #1.0"); }
  
  END /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  /Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/as --sysroot=/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -arch armv7 -no-cpp-precomp -mfpu=neon -mfloat-abi=softfp -ftree-vectorize -ffast-math -funsafe-math-optimizations -fsingle-precision-constant -isysroot /Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -I/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/include -mcpu=cortex-a8 -fPIC -c -o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.g896h4Sb.o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  FATAL:/Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../libexec/as/arm/as: I don't understand '-' flag!
  
  check_asm asm_mod_y "vmul.i32 d0, d0, %y0" :: "x"(0)
  
  check_as
  
  BEGIN /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
      1   void foo(void){ __asm__ volatile("vmul.i32 d0, d0, %y0" :: "x"(0)); }
  
  END /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  /Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/as --sysroot=/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DPIC -arch armv7 -no-cpp-precomp -mfpu=neon -mfloat-abi=softfp -ftree-vectorize -ffast-math -funsafe-math-optimizations -fsingle-precision-constant -isysroot /Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -I/Applications/Xcode5-DP4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/usr/include -mcpu=cortex-a8 -fPIC -c -o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.g896h4Sb.o /var/folders/gx/_k242p6s5cb0hss_pvj4s7vh0000gn/T//ffconf.4wwSSmLm.c
  
  FATAL:/Applications/Xcode5-DP4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../libexec/as/arm/as: I don't understand '-' flag!
  
  check_asm gnu_as ".macro m n
  
  \n:.int 0
  
  .endm
  
  m x"

  Yep, with config --disable-asm would complie but it probably not a option.