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• how I could encode fast video rgb planar format ?

  6 septembre 2018, par speedy

  I compile a command and use this command for encode and then speed up the video

  g++ -Wall -o main lena2.cpp  -lpng -lz -lX11 -lpthread -fopenmp -std=c++11  ;./main | ffmpeg -y -f rawvideo -pixel_format gbrp -video_size 1024x768 -i - -c:v h264 -pix_fmt yuv420p video.mov
  
  
  
  ffmpeg -y  -i video.mov -filter:v "setpts=PTS/8"  fastvideo.mov;  

  this is the code that i compile

  #include <iostream>
  
  #include "CImg.h"
  
  
  
  using namespace std;
  
  using namespace cimg_library;
  
  
  
  int main()
  
  {
  
     const unsigned int width=1024;
  
     const unsigned int height=768;
  
  
  
     // Basic frame we will draw in
  
     CImg<unsigned char="char"> image(width,height,1,3);
  
  
  
     unsigned char magenta[] = {255,0,255};
  
  
  
     // We are going to output 300 frames of 1024x768 RGB raw video
  
     // ... making a 10s long video at 30fps
  
     int radius=100;
  
     int cx=100;
  
     int cy=100;
  
     for(int frame=0;frame&lt;300;frame++){
  
        // Start with black - it shows fewer stains ;-)
  
        image.fill(0);
  
        image.draw_circle(cx,cy,radius,magenta);
  
  
  
        // Move and re-colour circle
  
        cx+=2; cy++; if(magenta[1]!=255){magenta[1]++;}
  
  
  
        // Output to ffmpeg to make video, in planar GBR format
  
        // i.e. run program like this
  
        // ./main | ffmpeg -y -f rawvideo -pixel_format gbrp -video_size 1024x768 -i - -c:v h264 -pix_fmt yuv420p video.mov
  
        char* s=reinterpret_cast(image.data()+(width*height));   // Get start of G plane
  
        std::cout.write(s,width*height);                                // Output it
  
        s=reinterpret_cast(image.data()+2*(width*height));       // Get start of B plane
  
        std::cout.write(s,width*height);                                // Output it
  
        s=reinterpret_cast(image.data());                        // Get start of R plane
  
        std::cout.write(s,width*height);                                // Output it
  
     }
  
  }
  
  </unsigned></iostream>

  but the rgb to video conversion take more of 20 minutes for 45000 frames

  How I could generate video.mov faster

  please help me

• How to install ffmpeg-php on CentOS 7

  8 février 2015, par Mark van Marion

  I have succesfully installed ffmpeg on CentOS 7, but just wont succeed installing the ffmpeg-php, because i get the following error (this is when i do the ’./configure’ command) :

  checking for PHP extension directory... /usr/lib64/php/modules
  
  checking for PHP installed headers prefix... /usr/include/php
  
  checking if debug is enabled... no
  
  checking if zts is enabled... no
  
  checking for re2c... no
  
  configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.
  
  checking for gawk... gawk
  
  checking for ffmpeg support... yes, shared
  
  checking whether to force gd support in ffmpeg-php... no
  
  checking for ffmpeg headers... 
  
  configure: error: ffmpeg headers not found. Make sure ffmpeg is compiled as     shared libraries using the --enable-shared option

  But ffmpeg is compiled as shared libary..

  ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jun 17 2014 01:25:46 with gcc 4.8.2 (GCC) 20140120 (Red Hat 4.8.2-16)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --enable-runtime-cpudetect --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-pthreads --enable-x11grab --enable-vdpau --disable-avisynth --enable-frei0r --enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -fPIC' --disable-stripping
  
    libavutil      52. 66.100 / 52. 66.100
  
    libavcodec     55. 52.102 / 55. 52.102
  
    libavformat    55. 33.100 / 55. 33.100
  
    libavdevice    55. 10.100 / 55. 10.100
  
    libavfilter     4.  2.100 /  4.  2.100
  
    libswscale      2.  5.102 /  2.  5.102
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  I have searched all over the internet, but cant find a answer. I hope someone can help me !

• include/c++/4.6.3/bits/stl_algobase.h:329 : undefined reference to

  27 novembre 2013, par user3041105

  My program is fails to compile with this error when I use my own account but when use the root account it compiles successfully. I have installed boost, ffmpeg and opencv.

  The errors are as follows :

  === linking: release/DenseTrack ===
  
   g++ -L/opt/lib -L/home/huangng/software/boost/lib -L/home/huangng/software/opencv/lib -L/home/huangng/software/ffmpeg/lib -pipe -Wall -O3 -ggdb -o release/DenseTrack .build_release/DenseTrack.o -lboost_program_options -lboost_regex -lboost_system -lboost_filesystem -lopencv_core -lopencv_highgui -lopencv_video -lopencv_imgproc -lavformat -lavdevice -lavutil -lavcodec -lswscale
  
   .build_release/DenseTrack.o: In function `main':
  
   /home/huangng/lab/dense_trajectory_release_v1.1/DenseTrack.cpp:103: undefined reference to `IplImagePyramid::rebuild(IplImageWrapper)'
  
   /home/huangng/lab/dense_trajectory_release_v1.1/DenseTrack.cpp:307: undefined reference to `IplImagePyramid::rebuild(IplImageWrapper)'
  
   /home/huangng/lab/dense_trajectory_release_v1.1/DenseTrack.cpp:56: undefined reference to `IplImageWrapper::operator=(IplImageWrapper const&)'
  
   /home/huangng/lab/dense_trajectory_release_v1.1/DenseTrack.cpp:58: undefined reference to `IplImageWrapper::operator=(IplImageWrapper const&)'
  
   /home/huangng/lab/dense_trajectory_release_v1.1/DenseTrack.cpp:60: undefined reference to `IplImageWrapper::operator=(IplImageWrapper const&)'
  
   /home/huangng/lab/dense_trajectory_release_v1.1/DenseTrack.cpp:62: undefined reference to `IplImageWrapper::operator=(IplImageWrapper const&)'
  
   /home/huangng/lab/dense_trajectory_release_v1.1/DenseTrack.cpp:68: undefined reference to `IplImagePyramid::rebuild(IplImageWrapper)'
  
   .build_release/DenseTrack.o: In function `IplImagePyramid':
  
   /home/huangng/lab/dense_trajectory_release_v1.1/./opencv/IplImagePyramid.hpp:34: undefined reference to `IplImagePyramid::init(CvSize, int, int, double)'
  
   .build_release/DenseTrack.o: In function `__copy_m<const>&#39;:
  
   /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_algobase.h:343: undefined reference to `IplImageWrapper::operator=(IplImageWrapper const&amp;)&#39;
  
   .build_release/DenseTrack.o: In function `__copy_m&#39;:
  
   /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_algobase.h:343: undefined reference to `IplImageWrapper::operator=(IplImageWrapper const&amp;)&#39;
  
   collect2: ld returned 1 exit status
  
   make: *** [release/DenseTrack] Error 1
  
  </const>