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  • Encode raw PCM to aac using ffmpeg native AAC

    10 avril 2012, par newentry

    I am trying to convert raw PCM to aac .So i am trying to achieve it through ffmpeg.

    My ffmepg configuration

    —enable-cross-compile —arch=arm —cpu=armv6 —enable-asm —target-os=linux —disable-stripping —enable-neon —enable-version3 —disable-shared —enable-static —enable-gpl —enable-memalign-hack —cc=arm-linux-androideabi-gcc —ld=arm-linux-androideabi-ld —extra-cflags='-fPIC -DANDROID -D_thumb_ -mthumb -Wfatal-errors -Wno-deprecated -marm -march=armv6 ' —disable-everything —enable-encoder=aac —enable-decoder=h264 —enable-hwaccels —disable-ffmpeg —disable-ffplay —disable-ffprobe —disable-ffserver —disable-network —enable-filter=buffer —enable-filter=buffersink —disable-demuxer=v4l —disable-demuxer=v4l2 —disable-indev=v4l —disable-indev=v4l2

    avcodec_find_encoder(CODEC_ID_AAC)  find's the AAC encoder succesfully.
    

    
audio_context= avcodec_alloc_context()
    
avcodec_open(audio_context, audio_encoder)  failed to open aac

    any idea ?

  • Adding x264 and AAC encoding to a Telegram-based FFmpeg script

    1er octobre 2024, par Pooria Darvishi

    I'm trying to modify a Telegram script that utilizes static FFmpeg and VPX libraries to also include x264 and AAC encoding. I'm quite new to this and could use some guidance.

    


    Background :

    


    Telegram uses static .a files of FFmpeg and VPX, compiled using NDK. I have the script that builds these libraries. I want to modify this script to include x264 and AAC libraries as well.

    


    Problem :

    


    I'm unsure how to integrate x264 and AAC into the existing build process and how to configure FFmpeg to use these codecs.

    


    Code snippets :

    


    build_ffmpeg.sh :

    


    #!/bin/bash

# instructions for build
# used
# ffmpeg 4.4.3
# lib vpx 1.10.9
# NDK for compile libvpx. Last successful build with 21.1.6352462
# NDK r10e for compile ffmpeg
#
# 1) download ffmpeg
# 2) set NDK_r10e and NDK variables
# 3) download lib vpx
# 4) copy libvpx to vpx-android folder and rename as libvpx
# 5) copy build_ffmpeg foleder in ffmepg directory
# 6) run build_ffmpeg.sh
# 7) see compiled library in build_ffmpeg/adnroid folder

NDK="/Users/macbookpro/Library/Android/sdk/ndk/21.1.6352462"
NDK_r10e="/Users/macbookpro/Library/Android/sdk/ndk/android-ndk-r10e"

#build vpx
cd ./vpx-android
export ANDROID_NDK=$NDK
sh build-vpx.sh
cd ..

cd ./x264-android
export ANDROID_NDK=$NDK
sh build.sh
cd ..

NDK=$NDK_r10e

function build_one {

echo "Cleaning..."
rm config.h
make clean

echo "Configuring..."

INCLUDES=" -I${PREFIX}/include"
LIBS=" -L${PREFIX}/lib"

cd /Users/macbookpro/Downloads/ffmpeg-4.4.3
./configure \
--cc=$CC \
--nm=$NM \
--enable-stripping \
--arch=$ARCH \
--target-os=linux \
--enable-cross-compile \
--yasmexe=$NDK/prebuilt/darwin-x86_64/bin/yasm \
--prefix=$PREFIX \
--enable-pic \
--disable-shared \
--enable-static \
--enable-asm \
--enable-inline-asm \
--cross-prefix=$CROSS_PREFIX \
--sysroot=$PLATFORM \
--extra-cflags="${INCLUDES} -Wl,-Bsymbolic -Os -DCONFIG_LINUX_PERF=0 -DANDROID $OPTIMIZE_CFLAGS -fPIE -pie --static -fPIC" \
--extra-ldflags="${LIBS} -Wl,-Bsymbolic -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -fPIC" \
--extra-libs="-lgcc" \
\
--enable-version3 \
--enable-gpl \
\
--disable-doc \
--disable-avx \
\
--disable-everything \
--disable-network \
--disable-zlib \
--disable-avfilter \
--disable-avdevice \
--disable-postproc \
--disable-debug \
--disable-programs \
--disable-network \
\
--enable-libvpx \
--enable-decoder=libvpx_vp9 \
--enable-libx264 \
--enable-runtime-cpudetect \
--enable-pthreads \
--enable-avresample \
--enable-swscale \
--enable-protocol=file \
--enable-decoder=h264 \
--enable-decoder=mpeg4 \
--enable-decoder=mjpeg \
--enable-decoder=gif \
--enable-decoder=alac \
--enable-decoder=opus \
--enable-demuxer=mov \
--enable-demuxer=gif \
--enable-demuxer=ogg \
--enable-demuxer=matroska \
--enable-hwaccels \
--enable-runtime-cpudetect \
$ADDITIONAL_CONFIGURE_FLAG

#echo "continue?"
#read
make -j8 install

}

#x86_64
PREBUILT=$NDK/toolchains/x86_64-4.9/prebuilt/darwin-x86_64
PLATFORM=$NDK/platforms/android-21/arch-x86_64
LD=$PREBUILT/bin/x86_64-linux-android-ld
AR=$PREBUILT/bin/x86_64-linux-android-ar
NM=$PREBUILT/bin/x86_64-linux-android-nm
GCCLIB=$PREBUILT/lib/gcc/x86_64-linux-android/4.9/libgcc.a
CC=$PREBUILT/bin/x86_64-linux-android-gcc
CROSS_PREFIX=$PREBUILT/bin/x86_64-linux-android-
ARCH=x86_64
CPU=x86_64
PREFIX=./android/x86_64
ADDITIONAL_CONFIGURE_FLAG="--disable-mmx --disable-inline-asm"
build_one

#arm64-v8a
PREBUILT=$NDK/toolchains/aarch64-linux-android-4.9/prebuilt/darwin-x86_64
PLATFORM=$NDK/platforms/android-21/arch-arm64
LD=$PREBUILT/bin/aarch64-linux-android-ld
AR=$PREBUILT/bin/aarch64-linux-android-ar
NM=$PREBUILT/bin/aarch64-linux-android-nm
GCCLIB=$PREBUILT/lib/gcc/aarch64-linux-android/4.9/libgcc.a
CC=$PREBUILT/bin/aarch64-linux-android-gcc
CROSS_PREFIX=$PREBUILT/bin/aarch64-linux-android-
ARCH=arm64
CPU=arm64-v8a
OPTIMIZE_CFLAGS=
PREFIX=./android/arm64-v8a
ADDITIONAL_CONFIGURE_FLAG="--enable-neon --enable-optimizations"
build_one

#arm v7n
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64
PLATFORM=$NDK/platforms/android-16/arch-arm
LD=$PREBUILT/bin/arm-linux-androideabi-ld
AR=$PREBUILT/bin/arm-linux-androideabi-ar
NM=$PREBUILT/bin/arm-linux-androideabi-nm
GCCLIB=$PREBUILT/lib/gcc/arm-linux-androideabi/4.9/libgcc.a
CC=$PREBUILT/bin/arm-linux-androideabi-gcc
CROSS_PREFIX=$PREBUILT/bin/arm-linux-androideabi-
ARCH=arm
CPU=armv7-a
OPTIMIZE_CFLAGS="-marm -march=$CPU"
PREFIX=./android/armeabi-v7a
ADDITIONAL_CONFIGURE_FLAG=--enable-neon
build_one

#x86
PREBUILT=$NDK/toolchains/x86-4.9/prebuilt/darwin-x86_64
PLATFORM=$NDK/platforms/android-16/arch-x86
LD=$PREBUILT/bin/i686-linux-android-ld
AR=$PREBUILT/bin/i686-linux-android-ar
NM=$PREBUILT/bin/i686-linux-android-nm
GCCLIB=$PREBUILT/lib/gcc/i686-linux-android/4.9/libgcc.a
CC=$PREBUILT/bin/i686-linux-android-gcc
CROSS_PREFIX=$PREBUILT/bin/i686-linux-android-
ARCH=x86
CPU=i686
OPTIMIZE_CFLAGS="-march=$CPU"
PREFIX=./android/x86
ADDITIONAL_CONFIGURE_FLAG="--disable-mmx --disable-yasm"
build_one

  if [[ -e ./build_ffmpeg/android ]]; then
      rm -rf ./build_ffmpeg/android
  fi

mv ./android ./build_ffmpeg/


    


    build-vpx.sh :

    


    #!/bin/bash

set -u
. _settings.sh

LIB_VPX="libvpx"
LIB_GIT=v1.10.0

if [[ -f "${LIB_VPX}/build/make/version.sh" ]]; then
  version=`"${LIB_VPX}/build/make/version.sh" --bare "${LIB_VPX}"`
fi

configure_make() {
  pushd "${LIB_VPX}" || exit
  ABI=$1;
  echo -e "\n** BUILD STARTED: ${LIB_VPX} (${version}) for ${ABI} **"

  configure "$@"
  case ${ABI} in
    armeabi)
      TARGET="armv7-android-gcc --disable-neon --disable-neon-asm"
    ;;
    armeabi-v7a)
      TARGET="armv7-android-gcc --enable-neon --disable-neon-asm"
    ;;
    arm64-v8a)
      TARGET="arm64-android-gcc"
    ;;
    x86)
      TARGET="x86-android-gcc"
    ;;
    x86_64)
      TARGET="x86_64-android-gcc"
    ;;
    mips)
      TARGET="mips32-linux-gcc"
    ;;
    mips64)
      TARGET="mips64-linux-gcc"
    ;;
  esac

make clean

CPU_DETECT="--disable-runtime-cpu-detect"
if [[ $1 =~ x86.* ]]; then
   CPU_DETECT="--enable-runtime-cpu-detect"
fi

  ./configure \
    --extra-cflags="-isystem ${NDK_SYSROOT}/usr/include/${NDK_ABIARCH} -isystem ${NDK_SYSROOT}/usr/include" \
    --libc=${NDK_SYSROOT} \
    --prefix=${PREFIX} \
    --target=${TARGET} \
    ${CPU_DETECT} \
    --as=auto \
    --disable-docs \
    --enable-pic \
    --enable-libyuv \
    --enable-static \
    --enable-small \
    --enable-optimizations \
    --enable-better-hw-compatibility \
    --enable-realtime-only \
    --enable-vp8 \
    --enable-vp9 \
    --disable-webm-io \
    --disable-examples \
    --disable-tools \
    --disable-debug \
    --disable-unit-tests || exit 1

  make -j${HOST_NUM_CORES} install
  popd || true
}

for ((i=0; i < ${#ABIS[@]}; i++))
do
  if [[ $# -eq 0 ]] || [[ "$1" == "${ABIS[i]}" ]]; then
    [[ ${ANDROID_API} -lt 21 ]] && ( echo "${ABIS[i]}" | grep 64 > /dev/null ) && continue;
    configure_make "${ABIS[i]}"
    echo -e "** BUILD COMPLETED: ${LIB_VPX} for ${ABIS[i]} **\n\n"
  fi
done


    


    _settings.sh :

    


    #!/bin/bash

if [[ -z $ANDROID_NDK ]] || [[ ! -d $ANDROID_NDK ]] ; then
    echo "You need to set ANDROID_NDK environment variable, exiting"
    echo "Use: export ANDROID_NDK=/your/path/to/android-ndk-rxx"
    echo "e.g.: export ANDROID_NDK=/opt/android/android-ndk-r18b"
    exit 1
fi

set -u

ANDROID_API=21

ABIS=("armeabi-v7a" "arm64-v8a" "x86" "x86_64")

BASEDIR=`pwd`
NDK=${ANDROID_NDK}
HOST_NUM_CORES=$(nproc)

CFLAGS_="-DANDROID -fpic -fpie"
LDFLAGS_=""

configure() {
  ABI=$1;

  case $ABI in
    armeabi)
      NDK_ARCH="arm"
      NDK_ABIARCH="arm-linux-androideabi"
      CFLAGS="-march=armv5 -marm -finline-limit=64"
      LDFLAGS=""
      ASFLAGS=""
    ;;
    armeabi-v7a)
      NDK_ARCH="arm"
      NDK_ABIARCH="arm-linux-androideabi"
      CFLAGS="${CFLAGS_} -Os -march=armv7-a -mfloat-abi=softfp -mfpu=neon -mtune=cortex-a8 -mthumb -D__thumb__"
      LDFLAGS="${LDFLAGS_} -march=armv7-a"
      ASFLAGS=""
    ;;
    arm64-v8a)
      NDK_ARCH="arm64"
      NDK_ABIARCH="aarch64-linux-android"
      CFLAGS="${CFLAGS_} -O3 -march=armv8-a"
      LDFLAGS="${LDFLAGS_}"
      ASFLAGS=""
    ;;
    x86)
      NDK_ARCH="x86"
      NDK_ABIARCH="i686-linux-android"
      CFLAGS="${CFLAGS_} -O3 -march=i686 -mtune=intel -msse3 -mfpmath=sse -m32 -fPIC"
      LDFLAGS="-m32"
      ASFLAGS="-D__ANDROID__"
    ;;
    x86_64)
      NDK_ARCH="x86_64"
      NDK_ABIARCH="x86_64-linux-android"
      CFLAGS="${CFLAGS_} -O3 -march=x86-64 -mtune=intel -msse4.2 -mpopcnt -m64 -fPIC"
      LDFLAGS=""
      ASFLAGS="-D__ANDROID__"
    ;;
  esac

  TOOLCHAIN_PREFIX=${BASEDIR}/android-toolchain
  NDK_SYSROOT=${TOOLCHAIN_PREFIX}/sysroot

  if [[ -e ${TOOLCHAIN_PREFIX} ]]; then
      rm -rf ${TOOLCHAIN_PREFIX}
  fi

  [[ -d ${TOOLCHAIN_PREFIX} ]] || python3 ${NDK}/build/tools/make_standalone_toolchain.py \
     --arch ${NDK_ARCH} \
     --api ${ANDROID_API} \
     --stl libc++ \
     --install-dir=${TOOLCHAIN_PREFIX}

  PREFIX=../../android/${ABI}


  export PATH=${TOOLCHAIN_PREFIX}/bin:$PATH
  export CROSS_PREFIX=${TOOLCHAIN_PREFIX}/bin/${NDK_ABIARCH}-
  export CFLAGS="${CFLAGS}"
  export CPPFLAGS="${CFLAGS}"
  export CXXFLAGS="${CFLAGS} -std=c++11"
  export ASFLAGS="${ASFLAGS}"
  export LDFLAGS="${LDFLAGS} -L${NDK_SYSROOT}/usr/lib"

  export AR="${CROSS_PREFIX}ar"
  export AS="${CROSS_PREFIX}clang"
  export CC="${CROSS_PREFIX}clang"
  export CXX="${CROSS_PREFIX}clang++"
  export LD="${CROSS_PREFIX}ld"
  export STRIP="${CROSS_PREFIX}strip"
  export RANLIB="${CROSS_PREFIX}ranlib"
  export CPP="${CROSS_PREFIX}cpp"
  export NM="${CROSS_PREFIX}nm"

  echo "**********************************************"
  echo "### Use NDK=${NDK}"
  echo "### Use ANDROID_API=${ANDROID_API}"
  echo "### Install directory: PREFIX=${PREFIX}"
  echo "**********************************************"
}


    


    Any help would be greatly appreciated.

    


    I'm working on an Android app that requires custom video encoding using FFmpeg. I've tried to build a newer version of FFmpeg but couldn't integrate it into my project due to the older version requirement. I've also tried pre-built scripts that support a wide range of codecs, but they don't generate the necessary .a files for libraries like x264, VPX, and AAC.

    


  • Revert "avformat/rtp : Pass sources and block filter addresses via sdp file for rtp"

    5 avril 2020, par Carl Eugen Hoyos
    Revert "avformat/rtp : Pass sources and block filter addresses via sdp file for rtp"

    This reverts commit b71685865fe761925feedda3cd0b288224d9a509.
    

    The commit lead to the use of an uninitialized variable.
    
Other issues were listed by Andreas Rheinhardt :
    
https://ffmpeg.org/pipermail/ffmpeg-devel/2020-March/259150.html
    • [DH] libavformat/rtsp.c

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