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• configure : Check for DXGI_OUTDUPL_FRAME_INFO for the ddagrab filter

  1er août 2022, par Martin Storsjö

  configure : Check for DXGI_OUTDUPL_FRAME_INFO for the ddagrab filter
  The DXGI_OUTDUPL_FRAME_INFO type isn't available in Windows API
  
  subsets other than "desktop", while the IDXGIOutput1 interface is
  
  available for all API subsets.
  This fixes compilation for UWP/"Windows Store" configurations (and
  
  older API subsets like Windows Phone).
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] configure

• How to encoding h.264 in node.js without ffmpeg

  21 juillet 2019, par j0nl1

  I’m doing a project which consists in controlling a drone (Tello) with a mobile phone. I choosed react native as hybrid app to develop this project, I had to insert a node.js inside the application (Node.js for Mobile Apps React Native) because the drone has only udp communication and also need a package to decode the stream video.

  the drone has three udp ports, one of them is to receive instructions, another one is to send the drone status and the last one for sending the video.

  This video I get from the stream it is in raw so I need a package to encode it or transform it.

  I was testing things because there isn’t documentation about this topic.
  I downloaded ffmpeg and after that I tried to decode the data in H.264 and finally I could see the video.

  After this introduction I would like to ask you :

  Is there any way I can use the same technique on the mobile without needing ffmpeg ?

  Is there any way to import ffmpeg into android and communicate with nodejs ?

• Building x264 on a Mac for android “No working C compiler found”

  20 novembre 2015, par LostPuppy

  I am trying to build x264 and eventually use it to build ffmpeg the following is my script :

  #!/bin/bash
  
  
  
  NDK="/Users/account/Documents/FFmpeg/android-ndk-r10e"
  
  TOOL_DIR_ARM="/Users/account/Documents/FFmpeg/android-ndk-r10e/sources/ffmpeg-2.8.2/my-android-toolchain"
  
  SYSROOT=$NDK/platforms/platforms/android-21/arch-arm
  
  echo "removing tool chain directory if it exists"
  
  rm -r $TOOL_DIR_ARM
  
  
  
  $NDK/build/tools/make-standalone-toolchain.sh \
  
      --platform=android-21 \
  
      --arch=arm \
  
      --install-dir=$TOOL_DIR_ARM \
  
      --toolchain=arm-linux-androideabi-clang3.6\
  
      --llvm-version=3.6 \
  
      --system=darwin-x86_64
  
  
  
  if [ -d $SYSROOT ]; then
  
      echo "$SYSROOT is a valid directory"
  
  fi
  
  
  
  function build_x264
  
  {
  
  cd x264
  
  
  
  # another build for phone
  
  ./configure \
  
  --cross-prefix=arm-linux-androideabi- \
  
  --sysroot=$SYSROOT \
  
  --host=arm-linux \
  
  --enable-static \
  
  --enable-pic \
  
  --disable-cli 
  
  
  
  make -j4
  
  make install
  
  
  
  cd ../
  
  }
  
  
  
  
  
  function build_one
  
  {
  
  cd 
  
  
  
  # another build for phone
  
  ./configure \
  
  --sysroot=$SYSROOT \
  
  --target-os=linux \
  
  --arch=arm \
  
  --cross-prefix=$TOOL_DIR_ARM/bin/arm-linux-androideabi- \
  
  --cc=$TOOL_DIR_ARM/bin/clang \
  
  --enable-cross-compile \
  
  --enable-encoder=mpeg4 \
  
  --enable-pthreads \
  
  --enable-gpl \
  
  --enable-libx264 \
  
  --enable-pic \
  
  --extra-cflags='-I/usr/local/include' \
  
  --extra-ldflags='-L/usr/local/lib'
  
  
  
  make clean
  
  make -j4
  
  make install
  
  
  
  }
  
  echo "Building x_264 library"
  
  build_x264
  
  echo "Building FFmpeg"
  
  build_one

  I get an error saying

  No working C compiler found.
  
  Makefile:3: config.mak: No such file or directory

  The following is the output from the config.log file

  checking for -mdynamic-no-pic... yes
  
  checking for -arch x86_64... yes
  
  x264 configure script
  
  
  
  checking whether gcc works... yes
  
  checking whether gcc supports for( int i = 0; i < 9; i++ ); with -std=gnu99... yes
  
  checking for -mpreferred-stack-boundary=5... no
  
  Failed commandline was:
  
  --------------------------------------------------
  
  gcc conftest.c -m64 -Qunused-arguments -Wall -I. -I$(SRCPATH) -mdynamic-no-pic -arch x86_64 -std=gnu99  -mpreferred-stack-boundary=5  -m64  -lm -arch x86_64$
  
  clang: error: unknown argument: '-mpreferred-stack-boundary=5'
  
  --------------------------------------------------
  
  Failed program was:
  
  --------------------------------------------------
  
  int main (void) {  return 0; }
  
  --------------------------------------------------
  
  checking whether yasm supports vpmovzxwd ymm0, xmm0... yes

  Solutions that I tried :

  I made sure I have a working GCC

  I have the update to date version of clang

  I have the update to date version of LLVM