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Autres articles (23)

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  • Revert "swscale : disable ARM code until its build failure with clang/iphone is fixed"

    12 janvier 2014, par Michael Niedermayer
    Revert "swscale : disable ARM code until its build failure with clang/iphone is fixed"

    This reverts commit c8c7736c1025bcf5bb27e104a0d0eae749408739.
    • [DH] libswscale/arm/Makefile
    • [DH] libswscale/swscale_unscaled.c

  • ffmpeg4.1.3 built with Android NDK is 4 times bigger than linux gcc

    3 juillet 2020, par ravin.wang

    FFmpeg version : 4.1.3
    
android-ndk-r19c, 44 MB (armeabi-v7a)
    
gcc-7 : 9.7 MB (x86_64)

    



    The configuration is almost the same :

    



    For android-ndk-19c :
    
I didn't link x264, under Linux x86_64, x264 is linked, so in theory Linux X86_64 links more code than the android one.

    



    #!/bin/bash

# set the toolchain
TOOLCHAIN=$NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64
CROSS_PREFIX=$TOOLCHAIN/bin/arm-linux-androideabi-
rm -f $(pwd)/compat/strtod.o
function build_one
{
#configure ffmpeg w/o libx264
./configure \
    --prefix=$PREFIX \
    --disable-everything --disable-programs --disable-doc \
    --enable-ffmpeg --enable-jni \
    --enable-encoder=aac \
    --enable-encoder=mpeg4 \
    --enable-encoder=pcm_u16le --enable-encoder=pcm_s16le \
    --enable-encoder=yuv4 \
    --enable-encoder=rawvideo \
    --enable-encoder=wrapped_avframe \
    --enable-decoder=aac --enable-decoder=aac_at --enable-decoder=aac_fixed \
    --enable-decoder=aac_latm \
    --enable-decoder=ac3 --enable-decoder=ac3_at --enable-decoder=ac3_fixed \
    --enable-decoder=avs \
    --enable-decoder=eac3 \
    --enable-decoder=eac3_at \
    --enable-decoder=h263 \
    --enable-decoder=h264 \
    --enable-decoder=hevc \
    --enable-decoder=mp1 --enable-decoder=mp1_at --enable-decoder=mp1float \
    --enable-decoder=mp2 \
    --enable-decoder=mp2_at \
    --enable-decoder=mp2float \
    --enable-decoder=mp3 --enable-decoder=mp3_at --enable-decoder=mp3float \
    --enable-decoder=vp8 --enable-decoder=vp9 \
    --enable-decoder=mpeg1video \
    --enable-decoder=mpeg2video \
    --enable-decoder=mpeg4 \
    --enable-decoder=mpegvideo \
    --enable-decoder=pcm_u16le --enable-decoder=pcm_s16le \
    --enable-decoder=yuv4 \
    --enable-decoder=rawvideo \
    --enable-decoder=wrapped_avframe \
    --enable-muxer=mpegts \
    --enable-muxer=mp4 \
    --enable-muxer=matroska --enable-muxer=matroska_audio --enable-muxer=webm \
    --enable-muxer=h264 \
    --enable-muxer=hevc \
    --enable-muxer=rawvideo \
    --enable-muxer=adts \
    --enable-muxer=yuv4mpegpipe \
    --enable-demuxer=aac \
    --enable-demuxer=ac3 \
    --enable-demuxer=eac3 \
    --enable-demuxer=m4v \
    --enable-demuxer=matroska \
    --enable-demuxer=mp3 \
    --enable-demuxer=mpegps \
    --enable-demuxer=mpegts \
    --enable-demuxer=mpegvideo \
    --enable-demuxer=h263 \
    --enable-demuxer=h264 \
    --enable-demuxer=hevc \
    --enable-demuxer=mov \
    --enable-demuxer=rawvideo \
    --enable-demuxer=yuv4mpegpipe \
    --enable-parser=aac \
    --enable-parser=aac_latm \
    --enable-parser=ac3 \
    --enable-parser=h263 \
    --enable-parser=h264 \
    --enable-parser=hevc \
    --enable-parser=mpeg4video \
    --enable-parser=mpegaudio \
    --enable-parser=mpegvideo \
    --enable-parser=vp8 \
    --enable-parser=vp9 \
    --enable-protocol=file \
    --enable-bsf=aac_adtstoasc \
    --enable-bsf=h264_mp4toannexb \
    --enable-bsf=hevc_mp4toannexb \
    --enable-bsf=mpeg4_unpack_bframes \
    --enable-filter=scale \
    --disable-zlib --disable-xlib --disable-iconv --disable-alsa \
    --disable-libxcb_shape --disable-libxcb_xfixes --disable-lzma \
    --disable-sdl2 --disable-sndio --disable-bzlib --disable-libxcb \
    --disable-hwaccels \
    --target-os=android \
    --enable-cross-compile \
    --toolchain=clang-usan \
    --cross-prefix=$CROSS_PREFIX \
    --cc=$TOOLCHAIN/bin/armv7a-linux-androideabi28-clang \
    --cxx=$TOOLCHAIN/bin/armv7a-linux-androideabi28-clang++ \
    --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
    --extra-ldflags="$ADDI_LDFLAGS" \
    --sysroot=$TOOLCHAIN/sysroot $ADDITIONAL_CONFIG_FLAG
make clean
make -j4
make install
}

CPU=armeabi-v7a
mkdir -p $(pwd)/android/$CPU
PREFIX=$(pwd)/android/$CPU 
ADDI_CFLAGS=""
ADDI_LDFLAGS="-Wl,-Bsymbolic"
ADDITIONAL_CONFIG_FLAG="--arch=arm"
build_one


    



    After finishing and stripping it, 44MB ffmpeg is generated, it is horrible, but I have no idea for it, I tried to add -Os CFLAGS, but it does not help.

    



    Here is the X86_64 :

    



    #!/bin/bash

configure()
{
    CPU=$1
    HOST=linux
    PREFIX=$(pwd)/$HOST/$CPU 
    ADDI_CFLAGS="-I$(pwd)/../x264-stable/$HOST/$CPU/include"
    ADDI_LDFLAGS="-L$(pwd)/../x264-stable/$HOST/$CPU/lib"
    ADDITIONAL_CONFIG_FLAG=""

    ./configure \
    --prefix=$PREFIX \
    --disable-everything --disable-programs --disable-doc \
    --enable-ffmpeg --enable-libx264 --enable-gpl \
    --enable-encoder=aac \
    --enable-encoder=libx264 \
    --enable-encoder=mpeg4 \
    --enable-encoder=pcm_u16le --enable-encoder=pcm_s16le \
    --enable-encoder=yuv4 \
    --enable-encoder=rawvideo \
    --enable-encoder=wrapped_avframe \
    --enable-decoder=aac \
    --enable-decoder=aac_at \
    --enable-decoder=aac_fixed \
    --enable-decoder=aac_latm \
    --enable-decoder=ac3 --enable-decoder=ac3_at --enable-decoder=ac3_fixed \
    --enable-decoder=avs \
    --enable-decoder=eac3 \
    --enable-decoder=eac3_at \
    --enable-decoder=h263 \
    --enable-decoder=h264 \
    --enable-decoder=hevc \
    --enable-decoder=mp1 --enable-decoder=mp1_at --enable-decoder=mp1float \
    --enable-decoder=mp2 \
    --enable-decoder=mp2_at \
    --enable-decoder=mp2float \
    --enable-decoder=mp3 --enable-decoder=mp3_at --enable-decoder=mp3float \
    --enable-decoder=vp8 --enable-decoder=vp9 \
    --enable-decoder=mpeg1video \
    --enable-decoder=mpeg2video \
    --enable-decoder=mpeg4 \
    --enable-decoder=mpegvideo \
    --enable-decoder=pcm_u16le --enable-decoder=pcm_s16le \
    --enable-decoder=yuv4 \
    --enable-decoder=rawvideo --enable-decoder=wrapped_avframe \
    --enable-muxer=mpegts \
    --enable-muxer=mp4 \
    --enable-muxer=matroska --enable-muxer=matroska_audio --enable-muxer=webm \
    --enable-muxer=h264 \
    --enable-muxer=hevc \
    --enable-muxer=rawvideo \
    --enable-muxer=adts \
    --enable-muxer=yuv4mpegpipe \
    --enable-demuxer=aac \
    --enable-demuxer=ac3 \
    --enable-demuxer=eac3 \
    --enable-demuxer=m4v \
    --enable-demuxer=matroska \
    --enable-demuxer=mp3 \
    --enable-demuxer=mpegps \
    --enable-demuxer=mpegts \
    --enable-demuxer=mpegvideo \
    --enable-demuxer=h263 \
    --enable-demuxer=h264 \
    --enable-demuxer=hevc \
    --enable-demuxer=mov \
    --enable-demuxer=rawvideo \
    --enable-demuxer=yuv4mpegpipe \
    --enable-parser=aac \
    --enable-parser=aac_latm \
    --enable-parser=ac3 \
    --enable-parser=h263 \
    --enable-parser=h264 \
    --enable-parser=hevc \
    --enable-parser=mpeg4video \
    --enable-parser=mpegaudio \
    --enable-parser=mpegvideo \
    --enable-parser=vp8 \
    --enable-parser=vp9 \
    --enable-protocol=file \
    --enable-bsf=aac_adtstoasc \
    --enable-bsf=h264_mp4toannexb \
    --enable-bsf=hevc_mp4toannexb \
    --enable-bsf=mpeg4_unpack_bframes \
    --enable-filter=scale \
    --disable-zlib --disable-xlib --disable-iconv \
    --disable-alsa --disable-libxcb_shape --disable-libxcb_xfixes \
    --disable-lzma --disable-sdl2 --disable-sndio \
    --disable-bzlib --disable-libxcb \
    --disable-hwaccels \
    --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
    --extra-ldflags="$ADDI_LDFLAGS"
}

build()
{
    make clean
    cpu=$1

    echo "build $cpu"

    configure $cpu
    make -j4
    make install
}

build linux_x86_64



    


  • Iphone Streaming and playing Audio Problem

    20 août 2011, par KayKay

    I am trying to make an app that plays audio stream using ffmpeg, libmms.
    I can open mms server, get stream, and decode audio frame to raw frame using suitable codec.
    However I don't know how to do next.
    I think I must use AudioToolbox/AudioToolbox.h and make audioqueue.
    but however when I give audioqueuebuffer decode buffer's memory and play, Only plays the white noise.
    Here is my code.

    What am i missing ?
    Any comment and hint is very appreciated.
    Thanks very much.

    while(av_read_frame(pFormatCtx, &pkt)>=0)
    
{
    
    int pkt_decoded_len = 0;
    
    int frame_decoded_len;
    
    int decode_buff_remain=AVCODEC_MAX_AUDIO_FRAME_SIZE * 5;
    
    if(pkt.stream_index==audiostream)
    
    {
    
        frame_decoded_len=decode_buff_remain;
    
        int16_t *decode_buff_ptr = decode_buffer;
    
        int decoded_tot_len=0;
    
        pkt_decoded_len = avcodec_decode_audio2(pCodecCtx, decode_buff_ptr, &frame_decoded_len,
    
                                                pkt.data, pkt.size);
    
        if (pkt_decoded_len <0) break;
    
        AudioQueueAllocateBuffer(audioQueue, kBufferSize, &buffers[i]);
    
        AQOutputCallback(self, audioQueue, buffers[i], pkt_decoded_len);
    

    
        if(i == 1){
    
            AudioQueueSetParameter(audioQueue, kAudioQueueParam_Volume, 1.0);
    
            AudioQueueStart(audioQueue, NULL);
    
        }
    
        i++;
    
    }
    
}
    

    

    
void AQOutputCallback(void *inData, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer, int copySize)
    
{
    
    mmsDemoViewController *staticApp = (mmsDemoViewController *)inData;
    
    [staticApp handleBufferCompleteForQueue:inAQ buffer:inBuffer size:copySize];
    
}
    

    
- (void)handleBufferCompleteForQueue:(AudioQueueRef)inAQ
    
                          buffer:(AudioQueueBufferRef)inBuffer
    
                            size:(int)copySize
    
{
    
    inBuffer->mAudioDataByteSize = inBuffer->mAudioDataBytesCapacity;
    
    memcpy((char*)inBuffer->mAudioData, (const char*)decode_buffer, copySize);
    

    
    AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL);
    
}

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