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  • How to Compile FFmpeg with x264 and libfdk-aac for Android

    12 novembre 2016, par Codeveloper

    Everyone.

    Please understand that i use the wrong english.

    I want to make encoding application using FFmpeg.

    I was successfully building NDK with FFmpeg.

    However, to encode H.264 video made had failed( Codec not found.. ).

    I was learned that libx264 is need encode H.264 and libfdk-aac is need encode AAC.

    so I tried to build the libx264 and libfdk-aac, But does not easily cross-compile.

    Please tell me what I did wrong.

    My Development Environment

    OS : ubuntu 13.10 64bit

    NDK : android-ndk-r9

    FFmpeg : ffmpeg-2.0.2

    x264 build : build_x264_android.sh

    NDK=$ANDROID_NDK_HOME

TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
PLATFORM=$NDK/platforms/android-9/arch-arm
CPU=arm
PREFIX=$NDK/sources/ffmpeg-2.0.2/android/$CPU

./configure --prefix=$PREFIX \
    --enable-shared \
    --enable-pic \
    --disable-asm \
    --disable-cli \
    --host=arm-linux \
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    --sysroot=$PLATFORM

make
make install
ldconfig

    fdk-aac build : build_aac_android.sh

    NDK=$ANDROID_NDK_HOME
CROSS_PREFIX=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
PLATFORM=$NDK/platforms/android-9/arch-arm
CPU=arm
PREFIX=$NDK/sources/ffmpeg-2.0.2/android/$CPU
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a -mthumb -D__thumb__"

./configure --prefix=$PREFIX \
    --with-sysroot=$PLATFORM \
    --host=arm-linux \
    --enable-shared \
    --with-pic=no \
    CC="${CROSS_PREFIX}gcc --sysroot=$PLATFORM" \
    CXX="${CROSS_PREFIX}g++ --sysroot=$PLATFORM" \
    RANLIB="${CROSS_PREFIX}ranlib" \
    AR="${CROSS_PREFIX}ar" \
    STRIP="${CROSS_PREFIX}strip" \
    NM="${CROSS_PREFIX}nm" \
    CFLAGS="-O3 $OPTIMIZE_CFLAGS --sysroot=$PLATFORM" \
    CXXFLAGS="-O3 $OPTIMIZE_CFLAGS --sysroot=$PLATFORM"

make
make install

    When I run 'build_aac_android.sh', shown error.

    log in config.log

    configure:2907: checking for arm-linux-gcc
configure:2934: result: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm
configure:3203: checking for C compiler version
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm --version >&5
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
configure:3223: $? = 127
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -v >&5
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
configure:3223: $? = 127
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -V >&5
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
configure:3223: $? = 127
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -qversion >&5
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
configure:3223: $? = 127
configure:3243: checking whether the C compiler works
configure:3265: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -O3 -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a -mthumb -D__thumb__ --sysroot=/platforms/android-9/arch-arm   conftest.c  >&5
./configure: line 3267: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory

configure:3312: error: in `/home/nel/android-ndk-r9/sources/ffmpeg-2.0.2/libfdk-aac':
    configure:3314: error: C compiler cannot create executables
    See `config.log' for more details

    I cannot understand that error!! I was confirmed that arm-linux-androideabi-gcc is found in the directory..

    I want to borrow you wisdom. Please tell me how to 'ffmpeg+x264+fdk-aac' build for android.

    Thanks.. :-)

  • Python-Opencv Write x264 video on memory buffer

    9 novembre 2016, par faxcon

    I have a problem for writing x264 video(or single frame) on memory buffer. In opencv for images, imencode and imdecode do this task. But i want save x264 video frame for lower memory usage and sending on internet. I am able to with jpeg but jpeg size bigger than x264 video frame and quality much worser. I searched but i can't find how i write video frame on buffer.

    Here is the example code to taking frames on webcam

            import numpy as np
        import cv2


        cap = cv2.VideoCapture(0)
        cap.set(3,320)
        cap.set(4,240)
        cap.set(5,30)
        # Define the codec and create VideoWriter object
        fourcc = cv2.VideoWriter_fourcc(*'x264')
        out = cv2.VideoWriter('.....sample.avi',fourcc, 30.0, (320,240))

        while(cap.isOpened()):
            ret, frame = cap.read()
            if ret==True:
                cv2.imshow('frame',frame)
                out.write(frame) #I want to write memory not disk
                if cv2.waitKey(1) & 0xFF == ord('q'):
                    break
            else:
                break

        # Release everything if job is finished
        cap.release()
        out.release()
        cv2.destroyAllWindows()

  • Python-Opencv Write x264 video on memory buffer

    9 novembre 2016, par faxcon

    I have a problem for writing x264 video(or single frame) on memory buffer. In opencv for images, imencode and imdecode do this task. But i want save x264 video frame for lower memory usage and sending on internet. I am able to with jpeg but jpeg size bigger than x264 video frame and quality much worser. I searched but i can't find how i write video frame on buffer.

    Here is the example code to taking frames on webcam

            import numpy as np
        import cv2


        cap = cv2.VideoCapture(0)
        cap.set(3,320)
        cap.set(4,240)
        cap.set(5,30)
        # Define the codec and create VideoWriter object
        fourcc = cv2.VideoWriter_fourcc(*'x264')
        out = cv2.VideoWriter('.....sample.avi',fourcc, 30.0, (320,240))

        while(cap.isOpened()):
            ret, frame = cap.read()
            if ret==True:
                cv2.imshow('frame',frame)
                out.write(frame) #I want to write memory not disk
                if cv2.waitKey(1) & 0xFF == ord('q'):
                    break
            else:
                break

        # Release everything if job is finished
        cap.release()
        out.release()
        cv2.destroyAllWindows()

  • Encoding RGB frames using x264 and AVCodec in C

    6 novembre 2016, par deepwork

    I have RGB24 frames streamed from camera and i want to encode them into h264 ,i found that AVCodec and x264 can do so, the problem is x264 as default accepts YUV420 as input so what i wrote was a program which convert RGB frames to YUV420 .that was by sws_scale function .this works well except that it does not satisfy the required FPS because the converting (RGB->YUV420) takes time.

    This is how i setup my encoder context :

    videoStream->id = 0;
vCodecCtx = videoStream->codec;

vCodecCtx->coder_type       = AVMEDIA_TYPE_VIDEO;
vCodecCtx->codec_id         = AV_CODEC_ID_H264;
vCodecCtx->bit_rate         = 400000;
vCodecCtx->width            = Width;
vCodecCtx->height           = Height;
vCodecCtx->time_base.den    = FPS;
vCodecCtx->time_base.num    = 1;
//vCodecCtx->time_base      = (AVRational){1,};
vCodecCtx->gop_size         = 12;
vCodecCtx->max_b_frames     = 1;
vCodecCtx->pix_fmt          = AV_PIX_FMT_YUV420P;

if(formatCtx->oformat->flags & AVFMT_GLOBALHEADER)
    vCodecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;

av_opt_set(vCodecCtx->priv_data, "preset", "ultrafast", 0);
av_opt_set(vCodecCtx->priv_data, "profile", "baseline", AV_OPT_SEARCH_CHILDREN);

if (avcodec_open2(vCodecCtx, h264Codec, NULL) < 0){
    return 0;
}

    when i changes AV_PIX_FMT_YUV420P to AV_PIX_FMT_RGB24 ,avcodec_open2 will fail. i read that there is a version of libx264 for RGB called libx264rgb but i even dont know whether i have to rebuild x264 with enabling this option or to download another source or i have to do it programmatically with the first x264 lib.

    the question is how to enable RGB as input to libx264 to use with libavcodec in C .or how to make the encoding or sws_scale more fast .

    Edit:

    How i built ffmpeg :

    NDK=D:/AndroidDev/android-ndk-r9
PLATFORM=$NDK/platforms/android-18/arch-arm/
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64

GENERAL="\
--enable-small \
--enable-cross-compile \
--extra-libs="-lgcc" \
--arch=arm \
--cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
--cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
--nm=$PREBUILT/bin/arm-linux-androideabi-nm \
--extra-cflags="-I../x264/android/arm/include" \
--extra-ldflags="-L../x264/android/arm/lib" "


MODULES="\
--enable-gpl \
--enable-libx264"

function build_ARMv6
{
  ./configure \
  --target-os=linux \
  --prefix=./android/armeabi \
  ${GENERAL} \
  --sysroot=$PLATFORM \
  --enable-shared \
  --disable-static \
  --extra-cflags=" -O3 -fpic -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp -mfpu=vfp -marm -march=armv6" \
  --extra-ldflags="-lx264 -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \
  --enable-zlib \
  ${MODULES} \
  --disable-doc \
  --enable-neon

  make clean
  make
  make install
}

build_ARMv6

echo Android ARMEABI builds finished

    How i built x264 :

    NDK=D:/AndroidDev/android-ndk-r9
PLATFORM=$NDK/platforms/android-18/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64
PREFIX=./android/arm

function build_one
{
  ./configure \
  --prefix=$PREFIX \
  --enable-static \
  --enable-pic \
  --host=arm-linux \
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  --sysroot=$PLATFORM

  make clean
  make
  make install
}

build_one

echo Android ARM builds finished

  • Encoding RGB frames using x264 and AVCodec in C

    6 novembre 2016, par deepwork

    I have RGB24 frames streamed from camera and i want to encode them into h264 ,i found that AVCodec and x264 can do so, the problem is x264 as default accepts YUV420 as input so what i wrote was a program which convert RGB frames to YUV420 .that was by sws_scale function .this works well except that it does not satisfy the required FPS because the converting (RGB->YUV420) takes time.

    This is how i setup my encoder context :

    videoStream->id = 0;
vCodecCtx = videoStream->codec;

vCodecCtx->coder_type       = AVMEDIA_TYPE_VIDEO;
vCodecCtx->codec_id         = AV_CODEC_ID_H264;
vCodecCtx->bit_rate         = 400000;
vCodecCtx->width            = Width;
vCodecCtx->height           = Height;
vCodecCtx->time_base.den    = FPS;
vCodecCtx->time_base.num    = 1;
//vCodecCtx->time_base      = (AVRational){1,};
vCodecCtx->gop_size         = 12;
vCodecCtx->max_b_frames     = 1;
vCodecCtx->pix_fmt          = AV_PIX_FMT_YUV420P;

if(formatCtx->oformat->flags & AVFMT_GLOBALHEADER)
    vCodecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;

av_opt_set(vCodecCtx->priv_data, "preset", "ultrafast", 0);
av_opt_set(vCodecCtx->priv_data, "profile", "baseline", AV_OPT_SEARCH_CHILDREN);

if (avcodec_open2(vCodecCtx, h264Codec, NULL) < 0){
    return 0;
}

    when i changes AV_PIX_FMT_YUV420P to AV_PIX_FMT_RGB24 ,avcodec_open2 will fail. i read that there is a version of libx264 for RGB called libx264rgb but i even dont know whether i have to rebuild x264 with enabling this option or to download another source or i have to do it programmatically with the first x264 lib.

    the question is how to enable RGB as input to libx264 to use with libavcodec in C .or how to make the encoding or sws_scale more fast .

    Edit:

    How i built ffmpeg :

    NDK=D:/AndroidDev/android-ndk-r9
PLATFORM=$NDK/platforms/android-18/arch-arm/
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64

GENERAL="\
--enable-small \
--enable-cross-compile \
--extra-libs="-lgcc" \
--arch=arm \
--cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
--cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
--nm=$PREBUILT/bin/arm-linux-androideabi-nm \
--extra-cflags="-I../x264/android/arm/include" \
--extra-ldflags="-L../x264/android/arm/lib" "


MODULES="\
--enable-gpl \
--enable-libx264"

function build_ARMv6
{
  ./configure \
  --target-os=linux \
  --prefix=./android/armeabi \
  ${GENERAL} \
  --sysroot=$PLATFORM \
  --enable-shared \
  --disable-static \
  --extra-cflags=" -O3 -fpic -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp -mfpu=vfp -marm -march=armv6" \
  --extra-ldflags="-lx264 -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \
  --enable-zlib \
  ${MODULES} \
  --disable-doc \
  --enable-neon

  make clean
  make
  make install
}

build_ARMv6

echo Android ARMEABI builds finished

    How i built x264 :

    NDK=D:/AndroidDev/android-ndk-r9
PLATFORM=$NDK/platforms/android-18/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64
PREFIX=./android/arm

function build_one
{
  ./configure \
  --prefix=$PREFIX \
  --enable-static \
  --enable-pic \
  --host=arm-linux \
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  --sysroot=$PLATFORM

  make clean
  make
  make install
}

build_one

echo Android ARM builds finished

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