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• Cannot get ffmpeg2.3.3 to work with Opencv2.4.9

  6 septembre 2014, par Siddharthan P R

  I need to open a video file in opencv2.4.9. I used the following code and I got the output :
   !!! Sorry cant find the video file !!!.

  So I figured I need to install ffmpeg first then install opencv.
  So I Uninstalled opencv and ffmpeg then tried to install ffmpeg 2.3.3 properly.
  Here are the methods i tried to install ffmpeg.

  Method 1 :
  sudo apt-get install ffmpeg.

  Method 2 :
  Download (HTTP) : http://ffmpeg.org/releases/ffmpeg-2.3.3.tar.bz2

  Then i typed the following in the terminal after cd to the extracted folder.

  sed -i 's/-lflite"/-lflite -lasound"/' configure && 
  
  
  
  ./configure --prefix=/usr        \
  
              --enable-gpl         \
  
              --enable-version3    \
  
              --enable-nonfree     \
  
              --disable-static     \
  
              --enable-shared      \
  
              --disable-debug      \
  
              --enable-libass      \
  
              --enable-libfdk-aac  \
  
              --enable-libmp3lame  \
  
              --enable-libtheora   \
  
              --enable-libvorbis   \
  
              --enable-libvpx      \
  
              --enable-libx264     \
  
              --enable-x11grab     &&
  
  make &&
  
  gcc tools/qt-faststart.c -o tools/qt-faststart

  Though Method 1 works fine (in just installing ffmpeg), the problem with Method 1 is that i cannot use "./configure —enable-shared" anywhere because i cannot locate the file "configure".

  The problem with method 2 is that it says

  -ERROR: libass not found, after installing libass it says
  
  
  
  -ERROR: libfdk-aac-0.1.3 not found, then
  
  
  
  -ERROR: lame-3.8 not found, then
  
  
  
  -ERROR: libtheora not found, here i really got tired of installing all these packages. I stopped.

  I am really confused how to pull this off : with Method 1 or Method 2 (both seem not to work ). Can i change the ./ configure using method 1 ?

  Any help would be greatly appreciated.

              #include 
  
              #include 
  
  
  
              int main(int argc, char** argv) 
  
              {
  
                  cvNamedWindow("xample2", CV_WINDOW_AUTOSIZE);
  
                  CvCapture* capture = cvCreateFileCapture( "1.mp4" );
  
                  if (!capture)
  
                  {
  
                    std::cout << "!!! Sorry cant find the video file !!!\n";
  
                    return -1; 
  
                  }
  
  
  
                  IplImage* frame;
  
                  while (1) 
  
                  {
  
                      frame = cvQueryFrame(capture);
  
                      if(!frame) 
  
                          break;
  
  
  
                      cvShowImage("xample2", frame);
  
  
  
                      char c = cvWaitKey(33);
  
                      if (c == 27) 
  
                          break;
  
                  }
  
  
  
                  cvReleaseCapture(&capture);
  
                  cvDestroyWindow("xample2");
  
              }

• vp8 : fix PPC assembly and bilinear C code to work if src_stride != dst_stride.

  23 septembre 2013, par Ronald S. Bultje

  vp8 : fix PPC assembly and bilinear C code to work if src_stride != dst_stride.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/ppc/vp8dsp_altivec.c
  • [DH] libavcodec/vp8dsp.c

• Passing long url as string in python subprocess

  16 février 2015, par rogoro

  When I pass this long url as

   subprocess.Popen(["ffmpeg", "-i",
  
   "https://r6---sn-ufuxaxjvh-q4fe.googlevideo.com/videoplayback?pl=16&upn=1-Ch_dUO4YE&ipbits=0&requiressl=yes&sver=3&itag=22&ratebypass=yes&dur=86.053&source=youtube&sparams=dur%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Cmime%2Cmm%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cupn%2Cexpire&key=yt5&mime=video%2Fmp4&fexp=900805%2C907263%2C919150%2C927622%2C942901%2C943917%2C945089%2C947225%2C948124%2C948603%2C952302%2C952605%2C952612%2C952901%2C955301%2C957201%2C959701&expire=1424133614&id=o-ANRJvkk7EYBC4ug2L1u_aJ9BifNGN5wrOnqvWkhce-WT&mm=31&initcwndbps=5045000&signature=5DC013D85BE81A4EFFA9C7B9510865A5BB7E2121.3655C01D8075EAB4668D4AFB28C401896038470A&ip=137.144.99.102&ms=au&mv=m&mt=1424111820", "out.mp4"], stdout=subprocess.PIPE)

  It works.

  But It doesn’t when I pass it as variable.
  Example :

    link =
  
    "the_above_long_string"
  
  
  
   subprocess.Popen(["ffmpeg", "-i", link, "out.mp4"], stdout=subprocess.PIPE) // NOT WORKING

  Any idea how to make it work ?

  ---

  ERROR

  ffmpeg version N-69659-gc0367f7 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 18.100 / 54. 18.100
  
    libavcodec     56. 21.102 / 56. 21.102
  
    libavformat    56. 19.100 / 56. 19.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5.  9.104 /  5.  9.104
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [tls @ 000000000033b9c0] The TLS connection was non-properly terminated.
  
  https://r6---sn-ufuxaxjvh-q4fe.googlevideo.com/videoplayback?sver=3&ratebypass=yes&signature=BD4B6B18A9753B2B99F8C439FD1A7D809E866740.D3822A9D82D67A0F92908863E08F887A101B58A7&initcwndbps=5112500&ipbits=0&source=youtube&dur=86.053&itag=22&pl=16&mime=video%2Fmp4&fexp=907263%2C927622%2C934954%2C9406738%2C9406963%2C943917%2C947225%2C948124%2C952302%2C952605%2C952612%2C952901%2C955301%2C957201%2C959701&mm=31&requiressl=yes&mt=1424116526&mv=m&ms=au&ip=137.144.99.102&key=yt5&upn=6MJQ3GrpFkA&expire=1424138291&sparams=dur%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Cmime%2Cmm%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cupn%2Cexpire&id=o-AGbNQ-s1alKbG-j05uoGOvT4MMeDv3qdgMqWZu-vGap9
  
  
  
  : Input/output error