Recherche avancée

Sur d’autres sites (7904)

• 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.. :-)

• ffmpeg : -copyts makes -t stop at timestamps, not duration

  30 juillet 2017, par arielCo

  From

  -t duration (input/output)

  When used as an input option (before -i), limit the duration of data read from the input file.

  When used as an output option (before an output url), stop writing the output after its duration reaches duration.

  So this should yield a 1-minute file with timestamps starting at 1:49, right ?

  ffmpeg -y -copyts -ss 1:49 -i ~/Videos/input.mkv -c copy -t 1:00 timing-1m49s.mkv 
  
  ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7 (SUSE Linux)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -g' --optflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --disable-openssl --enable-avresample --enable-libcdio --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcelt --enable-libcdio --enable-libdc1394 --enable-libfreetype --enable-libgsm --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-netcdf --enable-vaapi --enable-vdpau --enable-libfdk_aac --enable-nonfree --enable-libmp3lame --enable-libtwolame --enable-libx264 --enable-libx265 --enable-libxvid
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  Input #0, matroska,webm, from '/home/ariel/Videos/input.mkv':
  
    Metadata:
  
      encoder         : libebml v0.7.7 + libmatroska v0.8.0
  
      creation_time   : 2006-07-20T03:07:03.000000Z
  
    Duration: 00:23:57.06, start: 0.000000, bitrate: 1983 kb/s
  
      Stream #0:0: Video: h264 (High), yuv420p(progressive), 720x480, SAR 37:30 DAR 37:20, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc (default)
  
      Stream #0:1(eng): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default)
  
      Stream #0:2(jpn): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
  
      Stream #0:3(eng): Subtitle: dvd_subtitle, 720x480 (default)
  
      Metadata:
  
        title           : English Audio
  
      Stream #0:4(eng): Subtitle: dvd_subtitle, 720x480
  
      Metadata:
  
        title           : Japanese Audio
  
  Output #0, matroska, to 'timing-1m49s.mkv':
  
    Metadata:
  
      encoder         : Lavf57.71.100
  
      Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(progressive), 720x480 [SAR 37:30 DAR 37:20], q=2-31, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc (default)
  
      Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s (default)
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=    0 fps=0.0 q=-1.0 Lsize=       1kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

  Wrong. It outputs a file with no frames :

  -rwxrwx--- 1 root users 805 Jul 30 01:36 timing-1m49s.mkv

  I have to specify -t 1:49 or more, and e.g. -t 1:55 produces a 6-second file that starts at 0:00 and according to the metadata should last 1:55.

  I arrived at this point trying to extract a clip and add subtitles in the same command, but this minimal case looks to me contrary to the documentation.

• cuda invalid resource handle when using h264_cuvid decoder to decode video in my C program

  29 juillet 2021, par ChrisFisher

  I try to use GPU acceleration in my ffmpeg decode program, and I check the codecs of ffmpeg by command :ffmpeg -codecs | grep nv, and it shows that I can use h264_cuvid decoder(In fact, I have already used ffmpeg command line to encode and decode a test video with hardware acceleration and it turned out everything was all fine), but when I use the decoder in my program

  


  AVCodec *pCodec = avcodec_find_decoder_by_name("h264_cuvid");

  


  here is part of my program

  


  void FFMPEGCodec::initDecoder()
{
    AVCodec *pCodec = avcodec_find_decoder(AV_CODEC_ID_H264);
    if (!pCodec) {
        LOG("Codec decoder not found\n");
        exit(1);
    }

    pCodecCtx = avcodec_alloc_context3(pCodec);
    if (!pCodecCtx) {
        LOG("Could not allocate video codec context\n");
        exit(1);
    }

    pCodecCtx->width = gConfig->totalWidth;
    pCodecCtx->height = gConfig->totalHeight;
    pCodecCtx->has_b_frames = 0;

    if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {
        LOG("Could not open codec\n");
        exit(1);
    }

    if(_x264rgb){
        //used to convert GBRP frame to RGB image.
        convertCtx = sws_getContext(gConfig->totalWidth, gConfig->totalHeight, AV_PIX_FMT_GBRP, 
        gConfig->totalWidth, gConfig->totalHeight, AV_PIX_FMT_RGB24, SWS_FAST_BILINEAR, NULL, NULL, NULL); 
    } else {
        //used to convert YUV frame to RGB image.
        convertCtx = sws_getContext(gConfig->totalWidth, gConfig->totalHeight, AV_PIX_FMT_YUV420P, 
        gConfig->totalWidth, gConfig->totalHeight, AV_PIX_FMT_RGB24, SWS_FAST_BILINEAR, NULL, NULL, NULL); 
    }

    if(convertCtx == NULL){
        LOG("Failed to get SwsContext\n");
        exit(1);
    }

    //when using x264rgb, it's actually GBRP frame, 
    //just don't want to define another variable
    yuvFrame = av_frame_alloc();
    if (!yuvFrame) {
        LOG("Failed to allocate yuv frame\n");
        exit(1);
    }

    rgbFrame = av_frame_alloc();
    if (!rgbFrame) {
        LOG("Failed to allocate rgb frame\n");
        exit(1);
    }

    rgbFrame->format = AV_PIX_FMT_RGB24;
    rgbFrame->width  = pCodecCtx->width;
    rgbFrame->height = pCodecCtx->height;
 
    int ret = av_image_alloc(rgbFrame->data, rgbFrame->linesize, rgbFrame->width, rgbFrame->height,
                         AV_PIX_FMT_RGB24, 32);
    if (ret < 0) {
        LOG("Failed to allocate raw picture buffer\n");
        exit(1);
    }
}   


  


  and

  


  int FFMPEGCodec::decode(byte* pktData, int pktSize, byte* imgData)
{
    int ret = 0, got_packet = 0;
    AVPacket pkt;
    av_init_packet(&pkt);
    pkt.data = pktData;
    pkt.size = pktSize;

    // decode video frame
    ret = avcodec_decode_video2(pCodecCtx, yuvFrame, &got_packet, &pkt);
    if (ret < 0) {
        LOG("Error decoding frame\n");
        return -1;
    }

    sws_scale(convertCtx, yuvFrame->data, yuvFrame->linesize, 0, pCodecCtx->height, rgbFrame->data, rgbFrame->linesize);
    
    if (got_packet) {
        int width = pCodecCtx->width, height = pCodecCtx->height;
        int fsize = rgbFrame->linesize[0] * rgbFrame->height;
        int size = 54 + fsize;

        byte bmp_file_header[14] = { 'B', 'M', 0, 0, 0, 0, 0, 0, 0, 0, 54, 0, 0, 0, };
        byte bmp_info_header[40] = { 40, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 24, 0, };
        byte bmp_pad[3] = { 0, 0, 0 };

        bmp_file_header[2] = (unsigned char)size;
        bmp_file_header[3] = (unsigned char)(size >> 8);
        bmp_file_header[4] = (unsigned char)(size >> 16);
        bmp_file_header[5] = (unsigned char)(size >> 24);

        bmp_info_header[4] = (unsigned char)(width);
        bmp_info_header[5] = (unsigned char)(width >> 8);
        bmp_info_header[6] = (unsigned char)(width >> 16);
        bmp_info_header[7] = (unsigned char)(width >> 24);
        bmp_info_header[8] = (unsigned char)(height);
        bmp_info_header[9] = (unsigned char)(height >> 8);
        bmp_info_header[10] = (unsigned char)(height >> 16);
        bmp_info_header[11] = (unsigned char)(height >> 24);

        memcpy(imgData, bmp_file_header, 14);
        memcpy(imgData + 14, bmp_info_header, 40);
        memcpy(imgData + 54, rgbFrame->data[0], fsize);
        ret = size;
    }
    av_free_packet(&pkt);

    return ret;
}



  


  after compiling, I ran the program, and the decoder throw me a error :

  


  ctx->cvdl->cuvidDecodePicture(ctx->cudecoder, picparams) failed -> CUDA_ERROR_INVALID_HANDLE: invalid resource handle
when calling the function avcodec_decode_video2

  


  I don't know why this error occurred, by the way, I use a GTX1060 6G(Sorry I'm not a native English speaker)