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• ffmpeg/libav Linking issue in Windows

  11 décembre 2013, par Dídac Pérez

  I have cross compiled ffmpeg and libav from Linux to Windows (mingw32). So, I've got my .a files and ready to be used for linking in my MSVC2010 project. The thing is that I am getting linking errors and I don't understand why :

  1>RTSPCapture.obj : error LNK2019: unresolved external symbol _avformat_free_context referenced in function "public: int __thiscall Imagsa::RTSPCapture::dumpSync(class std::basic_string,class std::allocator<char> > const &amp;,class std::basic_string,class std::allocator<char> > const &amp;,class std::basic_stringstream,class std::allocator<char> > &amp;,double *,class std::vector<class> > &amp;)" (?dumpSync@RTSPCapture@Imagsa@@QAEHABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0AAV?$basic_stringstream@DU?$char_traits@D@std@@V?$allocator@D@2@@4@PANAAV?$vector@VMjpegFrame@Imagsa@@V?$allocator@VMjpegFrame@Imagsa@@@std@@@4@@Z)
  
  1>RTSPCapture.obj : error LNK2019: unresolved external symbol _avio_close referenced in function "public: int __thiscall Imagsa::RTSPCapture::dumpSync(class std::basic_string,class std::allocator<char> > const &amp;,class std::basic_string,class std::allocator<char> > const &amp;,class std::basic_stringstream,class std::allocator<char> > &amp;,double *,class std::vector<class> > &amp;)" (?dumpSync@RTSPCapture@Imagsa@@QAEHABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0AAV?$basic_stringstream@DU?$char_traits@D@std@@V?$allocator@D@2@@4@PANAAV?$vector@VMjpegFrame@Imagsa@@V?$allocator@VMjpegFrame@Imagsa@@@std@@@4@@Z)
  
  1>RTSPCapture.obj : error LNK2019: unresolved external symbol _avcodec_close referenced in function "public: int __thiscall Imagsa::RTSPCapture::dumpSync(class std::basic_string,class std::allocator<char> > const &amp;,class std::basic_string,class std::allocator<char> > const &amp;,class std::basic_stringstream,class std::allocator<char> > &amp;,double *,class std::vector<class> > &amp;)" (?dumpSync@RTSPCapture@Imagsa@@QAEHABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@0AAV?$basic_stringstream@DU?$char_traits@D@std@@V?$allocator@D@2@@4@PANAAV?$vector@VMjpegFrame@Imagsa@@V?$allocator@VMjpegFrame@Imagsa@@@std@@@4@@Z)
  
  </class></char></char></char></class></char></char></char></class></char></char></char>

  Does anybody know what could happen ?

• ffmpeg - create x thumbs from a video (Windows)

  7 septembre 2015, par C3X

  I’m looking for an solution to create 16 thumbs from a video.
  All solutions I found before, make thumbs from the first frames - but I need the 16 thumbs from the whole video. The video length is different to each video. Some are 3 min, 5 min or 10 min.

  If possible, I prefer an solution that works on Windows, because the videos all on my local PC and too big to copy them to my server just for create thumbs.

  Could someone help ?

  Regards
  Torsten

• Python threading module on windows after session logout

  1er décembre 2013, par e271p314

  I wrote a code which starts to record screen capture from the second it identifies mouse movement until it identifies the mouse didn't move for a predefined time (10 seconds).
  In python, on windows, how to wait until mouse moves ?
  If, I'm logged in to the session the code works fine, i.e. it starts and stops on time and records the screen capture. But, if I logout, I expect the script to identify that the mouse doesn't move and stop recording. Instead, the code doesn't stop and when I login again (long after the 10 seconds passed), the screen capture (from the previous session) keeps running, yelling the rt buffer is full and it keeps running until I close the cmd console even I expect it to work for 10 seconds (at least when I'm logged in). Any idea what is the issue ? I feel like it is something between the threading module and the session logout but I could be completely wrong about this.