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• FFMPEG inside conda shell , running c++

  20 novembre 2018, par albert1905

  I’m trying to run a c++ program that depends on ffmpeg library.
  Important to mention, I’m working on a distance computer, so I don’t have the entire permissions.
  So I created a conda shell, download ffmpeg-dev, so far so good.
  I’m trying to run the c++ I want and he doesn’t recognize the "libav*" libraries (which are part of ffmpeg).
  I read that the libraries suppose to sit in "/usr/include" (or soemthing like that), in order that

  # include <>

  will recognize the library, but I don’t have permissions to write to this directory, so I had to think about something else, so I copied all the libav directories from "anconda3/include" to my dir and manually changed all the #includes to the realpath.

  But now I’m getting this error :

  g++ mpegflow.cpp -o mpegflow -O3 -D__STDC_CONSTANT_MACROS -lswscale
  -lavdevice -lavformat -lavcodec -lswresample -lavutil -lpthread -lbz2 -lz -lc -lrt -Idependencies/include -Ldependencies/lib /nfs/iil/itools/em64t_SLES11/pkgs/gcc/4.7.2/.bin/../lib64/gcc/x86_64-suse-linux/4.7.2/../../../../x86_64-suse-linux/bin/ld :
  cannot find -lavdevice collect2 : error : ld returned 1 exit status
  make : *** [mpegflow] Error 1

  I understand the problem, But I have no Idea how to solve it.
  I’ll be happy for your help.
  Thanks.

• Removing GRUB

  14 avril 2011, par Multimedia Mike — General

  I have a Windows/Linux dual-booting computer that I don’t want to be dual boot anymore— the Linux part needs to go. Thus, the GRUB bootloader needs to be removed so that Windows boots normally. I found lots of tips around the internet about how to do this. Of course, none of them worked. So I must add to the general body of knowledge.

  I found tips that described how to manually remove GRUB via Linux— by using 'dd' to overwrite no more than 446 sectors of the boot disk with zeros. This strikes me as a dangerous and unstable proposition. It also wasn’t an option since I had already opted to reformat the formerly Linux partition via the Windows CD-ROM before I endeavored to remove the bootloader.

  Other forums and sites mentioned a combination of utilities found on the Windows CD-ROM including FIXBOOT, FIXMBR, and BOOTCFG. While these programs performed some functions, they didn’t achieve the desired effect— to make Windows boot automatically.

  New idea : Repartition the disk such that there is a (relatively) tiny extra partition. Then, well... reinstall Linux. I used a 4 GB partition and Ubuntu 10.10 and let it run its course which ended with installing GRUB... again.

  Seems roundabout— installing Linux specifically to boot into Windows. But it works.

• Memory leak in ffmpeg or libav with Mac os x 10.8.2 ?

  26 mars 2013, par James491

  I've been developing a video player with FFmpeg and am experiencing some memory leakage. I am on a Mac OS X 10.8.2 and valgrind is unstable. A large memory leakage, about the size of the video itself, is leaked during av_read_frame. Also, memory leakage occurs with the simple code below, after avformat_find_stream_info. None of my programs, including the small one below, leak on my Windows computer. Any suggestions would be helpful. Should I report a bug to FFmpeg ? I am using the latest version of FFmpeg, 1.1.2. Memory leakage also occurs if I use ffplay, but not if I use VLC.

      #include <libavcodec></libavcodec>avcodec.h>
  
      #include <libavformat></libavformat>avformat.h>
  
      #include <libswscale></libswscale>swscale.h>
  
      #include 
  
  
  
      int main(int argc, char* argv[]) {
  
  
  
          char              *video_addr = "/Users/###/Desktop/rawmovie.mov";
  
          AVFormatContext   *pFormatCtx;
  
  
  
          av_register_all();
  
  
  
          if (avformat_open_input(&amp;pFormatCtx, video_addr, NULL, NULL) != 0) {
  
              fprintf(stderr, "Could not open the video file\n");
  
              return -1;
  
          }
  
  
  
          if (avformat_find_stream_info(pFormatCtx, NULL) &lt; 0) {
  
              fprintf(stderr, "Couldn&#39;t find stream information\n");
  
          }
  
  
  
          avformat_close_input(&amp;pFormatCtx);
  
  
  
          return 0;
  
      }