Recherche avancée

Sur d’autres sites (6497)

• Run external app using process in .Net Maui

  23 septembre 2022, par master_ruko

  I built a WPF app that uses System.Diagnostics.Process to run ffmpeg.exe. In there I added an "External" folder to hold the ffmpeg files.

  


  

  


  Then just did something like

  


  new ProcessStartInfo()
{
    FileName = @"External\ffmpeg\bin\x64\ffmpeg.exe",
    ...
}


  


  Which worked just fine.

  


  Now I want to port this project to .Net Maui to leverage its cross-platformness so my app can be run on PC or Mac.

  


  My question is where do I add the ffmpeg files in the Maui project ? Do I Just put them in "Resources/Raw" and do some kind of check in my code to see which version use ; do I make a "Resources" folder in "Platforms/Windows" and "Platforms/MacCatalyst" and add the appropriate files there ?

  


  Side Note : I know almost nothing about Mac.

  


• Compiling libavcodec with emscripten (with hardware acceleration)

  14 juin 2018, par Mauro

  I am trying to compile libavcodec library with emscripten to generate a wasm to be used in a web project. It works, but I wanted to enable hardware acceleration (at least for OSX) but I cannot make it working.
  I am using this configuration :

  —cc=emcc \
  —enable-cross-compile \
  —target-os=none \
  —arch=x86 \
  —disable-runtime-cpudetect \
  —disable-asm \
  —disable-stripping \
  \
  —disable-bzlib \
  —disable-iconv \
  —disable-libxcb \
  —disable-lzma \
  —disable-sdl \
  —disable-securetransport \
  —disable-xlib \
  —disable-zlib \
  —disable-network \
  —disable-d3d11va \
  —disable-dxva2 \
  \
  —disable-all \
  —disable-everything \
  —enable-ffmpeg \
  —enable-avcodec \
  —enable-avformat \
  —enable-avutil \
  —enable-avfilter \
  —enable-swresample \
  —enable-swscale \
  —enable-decoder=h264 \
  —enable-decoder=hevc \
  —enable-encoder=mjpeg \
  —enable-vda \
  —enable-hwaccel=h264_vda \
  —enable-vaapi \
  —enable-shared

  but the result is : no hwaccels enabled. Is there something I am missing in the configuration ?

  Thanks

• Problems in building ffmpeg 2.3.3 for android using android NDK

  2 septembre 2014, par Alin

  ---

  An ffmpeg android for android 2.3+ which allows me to decompress/add watermark/recompress a video file. I need to have it working on all current CPUs.

  What I did so far

  I looked in a lot of sources for guidance. Most of the articles are obsolete or simply not work. Not to mention the whole struggle I went to from installing ubuntu on virtualBox, an OS which I never seen before. The whole java/sdk/ndk install was pretty easy but I had hard times in setting the PATH variables and most importantly WHERE to set them.

  So, here is my structure :
  The default folder path is /home/alin in which I have
  

  The PATH is set in etc/profile and I can confirm that it works. I know that it works because running java -version or ndk-build run just fine

  > ANDROID_SDK=/home/alin/android/sdk ANDROID_NDK=/home/alin/android/ndk
  
  > JAVA_HOME=/usr/local/java/jdk1.8.0_20
  
  > PATH=$PATH:$HOME/bin:$JAVA_HOME/bin:$ANDROID_SDK/platform-tools:$ANDROID_SDK/tools:$ANDROID_NDK
  
  > export JAVA_HOME export ANDROID_SDK export ANDROID_NDK export PATH

  I have downloaded the latest sources from ffmpeg.org and saved it in ndk/sources folder, in sources I have created an android_build.sh file as from (http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9/)

  

  #!/bin/bash
  
  
  
  NDK=/home/alin/android/ndk
  
  SYSROOT=$NDK/platforms/android-9/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-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=linux \
  
      --arch=arm \
  
      --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

  When running the .sh file I get this :
  

  Trying different build.sh sometimes I got different errors... so I have no idea what to do next.

  Please guide me to :

  • be able to build ffmpeg
  • make it compatible with as many devices as possible.

  Thank you.