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Sur d’autres sites (8576)

  • Calling FFMPEG with Boost.Process

    10 février 2016, par CadentOrange

    I’m trying to call FFMPEG from my C++ process to stream video from an IP camera. The FFMPEG command I use is ffmpeg.exe -rtsp_transport tcp -i rtsp://10.0.1.21/ONVIF/MediaInput?profile=1_def_profile4 -f image2pipe -pix_fmt rgb24 -vcodec rawvideo -r 15 -. I’ve verified this command in the command prompt and it does start a video stream and dumps the frames to stdout. I’ve also written similar code in Python and it works.

    This is the code I’m using to call FFMPEG with the arguments from the previous paragraph in C++ and read the individual frames from stdout.

    bool build_ffmpeg_arguments(const std::string &uri, std::vector &args)
    
{
    
    args.push_back("-rtsp_transport");
    
    args.push_back("tcp");
    
    args.push_back("-i");
    
    args.push_back(uri);
    
    args.push_back("-f");
    
    args.push_back("image2pipe");
    
    args.push_back("-pix_fmt");
    
    args.push_back("rgb24");
    
    args.push_back("-vcodec");
    
    args.push_back("rawvideo");
    
    args.push_back("-r");
    
    args.push_back("15");
    
    args.push_back("-");
    

    
    return true;
    
}
    

    

    
boost::process::child start_ffmpeg(const std::string &uri,
    
                                   const std::string &ffmpeg_path = "c:\\Tools\\ffmpeg.exe")
    
{
    
    std::vector args;
    
    build_ffmpeg_arguments(uri, args);
    

    
    boost::process::context ctx;
    
    ctx.stdout_behavior = boost::process::capture_stream();
    
    ctx.stderr_behavior = boost::process::capture_stream();
    

    
    return boost::process::launch(ffmpeg_path, args, ctx);
    
}
    

    
bool read_frame(boost::process::pistream &amp;is, int frame_size, std::vector<char> &amp;frame_bytes)
    
{
    
    char *buffer = new char[frame_size];
    

    
    frame_bytes.clear();
    
    is.read(buffer, frame_size);
    
    int bytes_read = is.gcount();
    
    frame_bytes.assign(buffer, buffer + bytes_read);
    

    
//    std::cout &lt;&lt; "Is Bad: " &lt;&lt; is.bad() &lt;&lt; std::endl;
    
//    std::cout &lt;&lt; "Is EOF: " &lt;&lt; is.eof() &lt;&lt; std::endl;
    
//    std::cout &lt;&lt; "gcount: " &lt;&lt; bytes_read &lt;&lt; std::endl;
    

    
    delete[] buffer;
    
    if(is.bad() || is.eof() || bytes_read &lt; frame_size)
    
    {
    
        //We read in gunk, skip this time.
    
        is.clear();
    
        return false;
    
    }
    
    else
    
    {
    
        return true;
    
    }
    
}
    

    

    
//This is where the code is invoked.
    
BOOST_AUTO_TEST_CASE(test_ffmpeg_stream)
    
{
    
    std::string uri = "rtsp://10.0.1.21/ONVIF/MediaInput?profile=1_def_profile4";
    
    int width = 320;
    
    int height = 240;
    
    int bpp = 3;
    
    int bytes_expected = width * height * 3;
    
    boost::process::child c = start_ffmpeg(uri);
    
    boost::process::pistream &amp;is = c.get_stdout();
    
    boost::process::pistream &amp;err = c.get_stderr();
    

    
    std::vector<char> buffer;
    
    bool result = read_frame(is, bytes_expected, buffer);
    
    //BOOST_CHECK_EQUAL(true, result);
    
    std::cout &lt;&lt; "Buffer size: " &lt;&lt; buffer.size() &lt;&lt; std::endl;
    

    
    std::string line;
    
    while (std::getline(err, line))
    
        std::cout &lt;&lt; line &lt;&lt; std::endl;
    
}
    
</char></char>

    The output from stderr suggests that the parameters could be passed in wrong.

    ffmpeg version 2.8.3 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 5.2.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
    
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
    
ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
    
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
    
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
    
ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
    
 --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
    
e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
    
ble-decklink --enable-zlib
    
  libavutil      54. 31.100 / 54. 31.100
    
  libavcodec     56. 60.100 / 56. 60.100
    
  libavformat    56. 40.101 / 56. 40.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 40.101 /  5. 40.101
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.101 /  1.  2.101
    
  libpostproc    53.  3.100 / 53.  3.100
    
rtsp://10.0.1.21/ONVIF/MediaInput?profile=1_def_profile4: Unknown error

    Is there a way of showing the full command line with arguments that boost::process::launch is calling ? Is there anything obvious that I’m doing wrong with boost::process ?

    Update :

    Suspecting that it could be the command line arguments being passed in wrong, I’ve created a dummy executable that prints out the command line arguments it receives. It’s a drop-in replacement for ffmpeg.exe purely so that I can see what command lines are being passed. The command line I’m getting is -rtsp_transport tcp -i rtsp://10.0.1.21/ONVIF/MediaInput?profile=1_def_profile4 -f image2pipe -pix_fmt rgb24 -vcodec rawvideo -r 15 -. Manually calling ffmpeg with that command line works as expected. Yet somehow it doesn’t work when launched via boost::process.

    ** Solution **

    It looks like I need to set the the environment field of the context. No idea why that fixes the problem, but it does.

    boost::process::context ctx;
    
ctx.environment = boost::process::self::get_environment();
    
ctx.stdout_behavior = boost::process::capture_stream();
    
ctx.stderr_behavior = boost::process::capture_stream();

  • lavc/sbrdsp : fix inverted boundary check

    25 mai 2024, par Rémi Denis-Courmont
    lavc/sbrdsp : fix inverted boundary check

    128-bit is the maximum, not the minimum here. Larger vector sizes can
    
result in reads past the end of the noise value table.
    

    This partially reverts commit cdcb4b98b7f74d87a6274899ff70724795d551cb.
    • [DH] libavcodec/riscv/sbrdsp_init.c

  • errors while cmake compiling ffmpeg with custom libx265 which has opencv code in it

    10 mai 2017, par Gibran

    i have changed libx265 with my code. now the new code dependency of opencv in it. so i changed the CMakeLists.txt of x265 source to solve it. i run exactly what i want it to do.
    But when i compile it and add library as an external library in ffmpeg. ffmpeg gives the same dependency error of OpenCV like before because of this library. see the log below of ffmpeg.

    there is a configure file in ffmpeg i think by adding OpenCv dependency in it.

    check_pkg_config x265 x265.h x265_api_get
    
pkg-config --exists --print-errors x265
    
check_func_headers x265.h x265_api_get -I/home/ryuk666/ffmpeg_build/include -L/home/ryuk666/ffmpeg_build/lib -lx265 -lstdc++ -lm -lrt -ldl
    
check_ld cc -I/home/ryuk666/ffmpeg_build/include -L/home/ryuk666/ffmpeg_build/lib -lx265 -lstdc++ -lm -lrt -ldl
    
check_cc -I/home/ryuk666/ffmpeg_build/include -L/home/ryuk666/ffmpeg_build/lib
    
BEGIN /tmp/ffconf.fTnjzKqn.c
    
    1   #include 
    
    2   #include 
    
    3   long check_x265_api_get(void) { return (long) x265_api_get; }
    
    4   int main(void) { int ret = 0;
    
    5    ret |= ((intptr_t)check_x265_api_get) &amp; 0xFFFF;
    
    6   return ret; }
    
END /tmp/ffconf.fTnjzKqn.c
    
gcc -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -I/home/ryuk666/ffmpeg_build/include -std=c11 -fomit-frame-pointer -pthread -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/fribidi -I/usr/include/freetype2 -I/usr/include/freetype2 -I/usr/include/opus -I/home/ryuk666/ffmpeg_build/include -L/home/ryuk666/ffmpeg_build/lib -c -o /tmp/ffconf.OuPGoDMW.o /tmp/ffconf.fTnjzKqn.c
    
gcc -L/home/ryuk666/ffmpeg_build/lib -Wl,--as-needed -Wl,-z,noexecstack -I/home/ryuk666/ffmpeg_build/include -L/home/ryuk666/ffmpeg_build/lib -o /tmp/ffconf.RVzkkwqb /tmp/ffconf.OuPGoDMW.o -lx265 -lstdc++ -lm -lrt -ldl -lx264 -lpthread -lm -ldl -lvpx -lm -lpthread -lvpx -lm -lpthread -lvpx -lm -lpthread -lvpx -lm -lpthread -lvorbisenc -lvorbis -logg -ltheoraenc -ltheoradec -logg -lopus -lm -lmp3lame -lfreetype -lz -lpng12 -lz -lm -lfdk-aac -lm -lass -lm -lharfbuzz -lfontconfig -lexpat -lfreetype -lexpat -lfribidi -lfreetype -lz -lpng12 -lz -lm -lm -lz -pthread
    
/home/ryuk666/ffmpeg_build/lib/libx265.a(encoder.cpp.o): In function `afterMeanShift(cv::Mat&amp;, int, std::vector >, cv::Size_<int>, std::vector >, cv::Mat, std::vector >)':
    
encoder.cpp:(.text+0x7abe): undefined reference to `cv::Mat::create(int, int const*, int)'
    
encoder.cpp:(.text+0x7ae0): undefined reference to `cv::Mat::zeros(cv::Size_<int>, int)'
    
encoder.cpp:(.text+0x7b17): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x7b91): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x7bad): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x7c29): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x7c45): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x7cbe): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x7d67): undefined reference to `cv::Mat::create(int, int const*, int)'
    
encoder.cpp:(.text+0x7d89): undefined reference to `cv::Mat::zeros(cv::Size_<int>, int)'
    
encoder.cpp:(.text+0x7dc0): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x7e39): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x7e55): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x7ed1): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x7eed): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x7f66): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x81bc): undefined reference to `cv::Mat::create(int, int const*, int)'
    
encoder.cpp:(.text+0x81de): undefined reference to `cv::Mat::zeros(cv::Size_<int>, int)'
    
encoder.cpp:(.text+0x8215): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x8291): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x82ad): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x8329): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x8345): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x83be): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x84aa): undefined reference to `cv::getStructuringElement(int, cv::Size_<int>, cv::Point_<int>)'
    
encoder.cpp:(.text+0x8598): undefined reference to `cv::morphologyEx(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, int, cv::_InputArray const&amp;, cv::Point_<int>, int, int, cv::Scalar_<double> const&amp;)'
    
encoder.cpp:(.text+0x85e1): undefined reference to `cv::getStructuringElement(int, cv::Size_<int>, cv::Point_<int>)'
    
encoder.cpp:(.text+0x86c9): undefined reference to `cv::morphologyEx(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, int, cv::_InputArray const&amp;, cv::Point_<int>, int, int, cv::Scalar_<double> const&amp;)'
    
encoder.cpp:(.text+0x8786): undefined reference to `cv::Mat::create(int, int const*, int)'
    
encoder.cpp:(.text+0x87a8): undefined reference to `cv::Mat::zeros(cv::Size_<int>, int)'
    
encoder.cpp:(.text+0x87df): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x8859): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x8875): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x88f1): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x890d): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x8986): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x89f1): undefined reference to `cv::threshold(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, double, double, int)'
    
encoder.cpp:(.text+0x8cac): undefined reference to `cv::connectedComponentsWithStats(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, cv::_OutputArray const&amp;, cv::_OutputArray const&amp;, int, int)'
    
encoder.cpp:(.text+0x8e3f): undefined reference to `cv::compare(cv::_InputArray const&amp;, cv::_InputArray const&amp;, cv::_OutputArray const&amp;, int)'
    
encoder.cpp:(.text+0x8e89): undefined reference to `cv::getStructuringElement(int, cv::Size_<int>, cv::Point_<int>)'
    
encoder.cpp:(.text+0x8f67): undefined reference to `cv::dilate(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, cv::_InputArray const&amp;, cv::Point_<int>, int, int, cv::Scalar_<double> const&amp;)'
    
encoder.cpp:(.text+0x9031): undefined reference to `cv::Mat::copyTo(cv::_OutputArray const&amp;) const'
    
encoder.cpp:(.text+0x9067): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x90f2): undefined reference to `cv::Mat::copySize(cv::Mat const&amp;)'
    
encoder.cpp:(.text+0x9138): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x91b6): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x91d5): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x9255): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x9270): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x92e6): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x9305): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x9385): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x93a4): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x9425): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x9444): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x94c5): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x94e0): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x9556): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x9575): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x95f5): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x9614): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x9695): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x96b0): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x9726): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x9745): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x97c5): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0x97e4): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0x9865): undefined reference to `cv::fastFree(void*)'
    
/home/ryuk666/ffmpeg_build/lib/libx265.a(encoder.cpp.o): In function `meanShift2(cv::Mat, cv::Mat&amp;, cv::Size_<int>, std::vector >&amp;, std::vector >&amp;, std::vector >)':
    
encoder.cpp:(.text+0x9a69): undefined reference to `cv::resize(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, cv::Size_<int>, double, double, int)'
    
encoder.cpp:(.text+0x9b2b): undefined reference to `cv::Mat::copyTo(cv::_OutputArray const&amp;) const'
    
encoder.cpp:(.text+0xa11c): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xa191): undefined reference to `cv::Mat::deallocate()'
    
/home/ryuk666/ffmpeg_build/lib/libx265.a(encoder.cpp.o): In function `x265::Encoder::encode(x265_picture const*, x265_picture*)':
    
encoder.cpp:(.text+0xa2c3): undefined reference to `cvCreateImage'
    
encoder.cpp:(.text+0xa450): undefined reference to `cvSet2D'
    
encoder.cpp:(.text+0xa4cd): undefined reference to `cv::cvarrToMat(void const*, bool, bool, int, cv::AutoBuffer*)'
    
encoder.cpp:(.text+0xa5e9): undefined reference to `cv::Mat::copyTo(cv::_OutputArray const&amp;) const'
    
encoder.cpp:(.text+0xa794): undefined reference to `cv::resize(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, cv::Size_<int>, double, double, int)'
    
encoder.cpp:(.text+0xa86e): undefined reference to `cv::Mat::copyTo(cv::_OutputArray const&amp;) const'
    
encoder.cpp:(.text+0xb1ec): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xb262): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xb300): undefined reference to `cv::resize(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, cv::Size_<int>, double, double, int)'
    
encoder.cpp:(.text+0xb45e): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xb4d4): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xb565): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xb5e0): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xb5ff): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xb67e): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xb810): undefined reference to `cv::Mat::copyTo(cv::_OutputArray const&amp;) const'
    
encoder.cpp:(.text+0xbad4): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xbb3a): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xbcd2): undefined reference to `cv::resize(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, cv::Size_<int>, double, double, int)'
    
encoder.cpp:(.text+0xc01e): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xc083): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xc11b): undefined reference to `cv::resize(cv::_InputArray const&amp;, cv::_OutputArray const&amp;, cv::Size_<int>, double, double, int)'
    
encoder.cpp:(.text+0xc1ea): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xc260): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xc27b): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xc2f1): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xc310): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xc38d): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xc3ac): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xc429): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xc4dd): undefined reference to `cv::fastFree(void*)'
    
encoder.cpp:(.text+0xd5a0): undefined reference to `cv::Mat::deallocate()'
    
encoder.cpp:(.text+0xd6bc): undefined reference to `cv::Mat::copySize(cv::Mat const&amp;)'
    
encoder.cpp:(.text+0xd7a6): undefined reference to `cv::Mat::copySize(cv::Mat const&amp;)'
    
encoder.cpp:(.text+0xda4f): undefined reference to `cv::Mat::copySize(cv::Mat const&amp;)'
    
collect2: error: ld returned 1 exit status
    
ERROR: x265 not found using pkg-config
    
</int></int></int></int></int></int></double></int></int></int></int></double></int></int></int></double></int></int></int></int></int></int></int>

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