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• Revision 51d529a578 : vp9_pick_inter_mode() : minor optimizations 1. remove duplicate initialization t

  16 mars 2015, par Yaowu Xu

  Changed Paths :
   Modify /vp9/encoder/vp9_pickmode.c

  
  
  vp9_pick_inter_mode() : minor optimizations

  1. remove duplicate initialization to mbmi->interp_filter.
  2. move mv clamping into ref_frame loop instead of mode checking loop.
  3. move the check if last frame is same as golden frame earlier to
  avoid initialization of Golden reference related variables.

  Change-Id : Idf2d05e19e94a24f69cc289687869fc71d2ff289

• 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

• Revision f2b978e895 : Use normal rate_correction_factor for gf in CBR mode I0c5f010 changed to allow

  10 novembre 2014, par Yaowu Xu

  Changed Paths :
   Modify /vp9/encoder/vp9_ratectrl.c

  
  
  Use normal rate_correction_factor for gf in CBR mode

  I0c5f010 changed to allow update golden reference buffer in CBR mode,
  this commit changes the use of rate_correction_factor for those frames
  to be aligned with the new usage. This commit attempts to solve two
  issues :

  a. Initialization of rate correction factor for Golden Frame
  Prior to this patch, even the regular inter frame has been update
  the rate correction factor based on content and encoding results,
  the first golden frame would still use the ininitialized value
  that can be way off.

  b. Allowing rate correction factor update to be slightly faster
  Prior to this patch, when the rate correction factor is off, the
  update to the factor is too slow, the factor could not get close
  to a semi-correct value even after many frames.

  The commit helps all clips in psnr/ssim metric, but especially to
  a few clip in RTC set that rate correction was way off. For example
  thaloundeskmtgvga gained about .5dB for both overall/average psnr.

  Change-Id : I0be5c41691be57891d824505348b64be87fa3545