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• pkg-config cant find libraries on ffmpeg build (linux)

  29 décembre 2018, par Rafael Lima

  I’m trying to build ffmpeg for android on ubuntu...

  -I've cross-compiled all the dependencies I need for my configuration
  
  -I've set up the configuration parameters

  but ./configure keep saying

  ERROR: librtmp not found using pkg-config

  I’ve tested and if I remove --enable-librtmp it will configure complain about other library. The thing is I i build all libs myself. So I’m sure it is present and at right folder.

  I’m not linux/compiler specialist and so far i’ve spend more than 10 days to get everything i need to this project rightly done. I know i can simple modify the configure file under ffmpeg and remove the pkg-config check but this isn’t the solution I’m looking for

  the command i run is :

  ./configure --prefix=$PREFIX \
  
    --arch=${ARCH}\
  
      --cpu=${CPU} \
  
      --cross-prefix=$CROSS_PREFIX \
  
      --enable-cross-compile \
  
      --sysroot=$SYSROOT \
  
      --target-os=linux \
  
      --sysinclude=$NDK/sysroot/usr/include \
  
      --pkg-config=$(which pkg-config) \
  
      --pkg-config-flags="--static" \
  
      --enable-pic \
  
      --enable-gpl \
  
      --enable-nonfree \
  
      \
  
      --disable-shared \
  
      --enable-static \
  
      \
  
      --enable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffprobe \
  
      \
  
      --enable-librtmp \
  
      --enable-zlib \
  
      --enable-mediacodec \
  
      --enable-libx264 \
  
      --enable-libfdk-aac\
  
      --enable-libfreetype\
  
      --enable-libmp3lame\
  
      --enable-openssl\
  
      --enable-libfontconfig\
  
      --enable-bsf=aac_adtstoasc \
  
      \
  
      --disable-doc \
  
      $ADDITIONAL_CONFIGURE_FLAG

  I would like to know which tests pkg-config do to detect if any lib is installed ? and how can i show it the libs i need are really present

  =========UPDATE=========

  ${PREFIX} stands for build_dir under which i’ve a folder lib/pkgconfig with many .pc files including librtmp.pc. so why it can detect the others but not this one ? i checked the content of the file and seams to be right, similar to others at same folder

• Issue #3 when compiling Xuggler for Raspberry pi with liboil

  19 juillet 2014, par Ashish Sharma

  I am trying to compile Xuggler for Raspberry Pi(Running on Debian OS aka Raspbian),

  I followed the ’Basic Build Instructions’ available here for compiling Xuggler.

  After I successfully installed all the prerequisites and set the correct paths, I ran the following command :

  ant run-tests

  After sometime I am facing the following error and the ant build fails :

  scroll at the end of log to see the issue

      Incarcerated package configured: ../../../../../captive/liboil
  
  Incarcerating package ../../../../../captive/liboil to fake DESTDIR=/home/pi/Downloads/xuggle-xuggler/build/native/armv6l-unknown-linux-gnueabihf/captive/stage
  
  /bin/bash: -c: line 1: syntax error near unexpected token `;'
  
  /bin/bash: -c: line 1: `          case armv6l-unknown-linux-gnueabihf in; *mingw*|*cygwin*) export as_cv_unaligned_access=yes ;; esac \'
  
  make: *** [all-local] Error 1

  I tried correcting the mentioned shell script but to no avail,

  Please help, following is the shell script code :

  if [ "" = "1" ]; then
  
    CROSS="--host ${HOST_OS}"
  
    # needed for mingw32 cross-compile to work
  
    case $HOST_OS in
  
       *mingw*|*cygwin*)
  
      export as_cv_unaligned_access=yes
  
      ;;
  
    esac
  
  else
  
    CROSS=
  
  fi

• Performance of FFMPEG on iOS [closed]

  11 juin 2013, par madadi

  I am presently using FFMPEG to decode videos and do some post processing on iOS. Below is the configuration of FFMPEG that I am presently using :

  --enable-version3 \
  
      --enable-static \
  
      --disable-shared \
  
      --disable-doc \
  
      --disable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffprobe \
  
      --disable-ffserver \
  
      --disable-avdevice \
  
      --disable-avfilter \
  
      --disable-postproc \
  
      --enable-small \
  
      --cross-prefix="$DEVROOT/usr/bin/" \
  
      --enable-cross-compile \
  
      --target-os=darwin \
  
      --arch="arm"\
  
      --cpu="cortex-a8" \
  
      --cc="$CC" \
  
      --as="$AS" \
  
      --disable-symver \
  
      --disable-debug \
  
      --disable-indevs \
  
      --disable-encoders \
  
      --disable-bsfs \
  
      --enable-pic \
  
      --disable-filters \
  
      --enable-neon

  However, the video decoding seems extremely slow. Can someone please tell me the performance of H.264 media decoding using FFMPEG on iOS ? The natively recorded HD videos seem to be extremely choppy while the videos transcoded to 640x480(using AVAssets) seem to play decent. Is there any better approach to get the media decoded faster. I want to have access to each decoded frame to be able to apply effects that I intend to. Thanks in advance.