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• runtime error when linking ffmpeg libraries in qt creator

  6 juillet 2012, par dxthegreat

  I'm quite new around here but i hear that if you want a question answered, stackoverflow is the place to ask it >.<. So i hope that my question isn't too trivial that everyone will get annoyed at my lack of research (I've tried googling for two days already D= no progress !)
  I've also asked this question in the Qt forums, but i figured i'd ask here too.

  so...

  For the last few days I’ve been fiddling around with opengl and the like, trying to write a video player.

  However, when i try to import the ffmpeg libraries (avcodec, avformat, avutils etc), an error occurs on runtime (the program compiles fine). When compiled and run in debug mode, the error message gives me only a memory address and error code 135 (DLL not found).

  This error occurs when i include a function from those libraries in my code (e.g. av_register_all()) and it occurs regardless of whether the function is actually called.

  So i’m thinking that I’m doing something wrong when linking these libraries.
  I’m currently using :
  Windows vista (32bit),
  Qt creator 2.4.1 based on Qt 4.7.4 (32bit),
  Zeranoe’s FFmpeg build git-3233ad4 (2012-06-30)

  My .pro file consists of :

  QT       += core gui opengl
  
  
  
  TARGET = test
  
  TEMPLATE = app
  
  
  
  
  
  SOURCES += main.cpp\
  
          mainwindow.cpp \
  
      glwidget.cpp
  
  
  
  HEADERS += mainwindow.h \
  
      glwidget.h \
  
  
  
  FORMS    += mainwindow.ui
  
  
  
  
  
  LIBS += -L"$$_PRO_FILE_PWD_/libraries/ffmpeg/libs/" -lavcodec -lavformat -lavutil
  
  INCLUDEPATH += libraries/ffmpeg/includes

  I’ve tried many variations to the LIBS += line and checked my filepath many times. However, the DLL not found error occurs in all of these variations =(.

  Is there something I’m forgetting when doing these includes ?

  Thanks in advance >.<,
  (young and naive) aspiring dev

• FFMPEG : using filters for adding transparent watermark

  13 mai 2022, par Sar sinua

  how can i combine these two lines of code for adding transparent watermark (with Dynamic size)

  &#xA;

  ffmpeg -i 1.gif -i logo.png -filter_complex "[1]format=rgba,colorchannelmixer=aa=0.5[logo];[0][logo]overlay=(W-w)/2:H-h-5" -c:a copy output.gif

ffmpeg -i 1.gif -i logo.png -filter_complex "[1][0]scale2ref=w=oh*mdar:h=ih*0.1[logo][video];[video][logo]overlay=(W-w)/2:H-h-5" -c:a copy output.gif


  &#xA;

  i have tried the following code :

  &#xA;

  ffmpeg -i 1.gif -i logo.png -filter_complex "[1][0]scale2ref=w=oh*mdar:h=ih*0.1[logo][video];[1]format=rgba,colorchannelmixer=aa=0.5[logo];[0][logo]overlay=(W-w)/2:H-h-5" -c:a copy output.gif


  &#xA;

  i got the following Error :&#xA;Filter scale2ref has an unconnected output

  &#xA;

• Evolution #3284 (En cours) : changer le vert de l’espace privé par defaut

  20 juillet 2015, par b b

  J’ouvre de nouveau puisque la modification a été annulée par r22314 et r22314, cf :

  http://archives.rezo.net/archives/spip-commit.mbox/E7F52BFKBGVZYK4UAOUUUKDI7S7AF4GE/