can't link ffmpeg 2.7 dev lib and Include folder inside Qt Development

[Atdhe]

!URGENT
My pro.file code

#-------------------------------------------------

Project created by QtCreator 2014-02-25T13:01:38

#-------------------------------------------------

QT += core gui webkitwidgets multimediawidgets svg

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET =
TEMPLATE = app

images.path = $$OUT_PWD
images.files += resources/cutscenes/*.mp4
INSTALLS += images

ICON = resources/osx_icon.icns
RC_FILE = .rc

win32:LIBS += C:/ffmpeg/lib -lavformat -lavutil -lavcodec -lavdevice -lswscale -lswresample
win32:INCLUDEPATH += "C:/ffmpeg/include"

DEFINES += __STDC_CONSTANT_MACROS
DEFINES += __STDC_FORMAT_MACROS

TRANSLATIONS += languages/whatchado_diy.de.ts
languages/whatchado_diy.en.ts

!isEmpty(TRANSLATIONS) {

isEmpty(QMAKE_LRELEASE) {
win32:QMAKE_LRELEASE = $$[QT_INSTALL_BINS]\lrelease.exe
else:QMAKE_LRELEASE = $$[QT_INSTALL_BINS]/lrelease
}

isEmpty(TS_DIR):TS_DIR = Translations

TSQM.name = lrelease ${QMAKE_FILE_IN}
TSQM.input = TRANSLATIONS
TSQM.output = $$TS_DIR/${QMAKE_FILE_BASE}.qm
TSQM.commands = $$QMAKE_LRELEASE ${QMAKE_FILE_IN}
TSQM.CONFIG = no_link
QMAKE_EXTRA_COMPILERS += TSQM
QMAKE_CFLAGS = -Wno-unused-parameter
QMAKE_CFLAGS = -Wno-unused-variable
#QMAKE_CXXFLAGS_WARN_OFF = -Wunused-variable
#QMAKE_CXXFLAGS_WARN_OFF = -Wunused-parameter
PRE_TARGETDEPS += compiler_TSQM_make_all
} else:message(No translation files in project)

SOURCES += main.cpp
mainwindow.cpp
settingsdialog.cpp
interviews.cpp
listdelegate.cpp
helphelp.cpp
helpbp.cpp
uploaddialog.cpp
previewdialog.cpp
qtx/qxtspanslider.cpp
qtx/qxtglobal.cpp
questions.cpp
addinterview.cpp
startview.cpp
logindialog.cpp
videopreview.cpp
videothread.cpp
videoencode.cpp
video_image.cpp
videoencodethread.cpp
videoplaythread.cpp
audiobuffer.cpp
videobuffer.cpp
videoview.cpp
videodecodethread.cpp
uploadthread.cpp
uploadprogressdialog.cpp
aboutdialog.cpp
welcome.cpp

HEADERS += mainwindow.h
settingsdialog.h
interviews.h
listdelegate.h
helphelp.h
helpbp.h
uploaddialog.h
previewdialog.h
qtx/qxtspanslider_p.h
qtx/qxtspanslider.h
qtx/qxtglobal.h
questions.h
addinterview.h
startview.h
logindialog.h
videopreview.h
videothread.h
videoencode.h
config.h
video_image.h
videoencodethread.h
videoplaythread.h
audiobuffer.h
videobuffer.h
videoview.h
videodecodethread.h
log.h
uploadthread.h
uploadprogressdialog.h
aboutdialog.h
welcome.h

FORMS += mainwindow.ui
settingsdialog.ui
helphelp.ui
helpbp.ui
uploaddialog.ui
previewdialog.ui
mainwindow_test.ui
addinterview.ui
startview.ui
logindialog.ui
uploadprogressdialog.ui
aboutdialog.ui
welcome.ui

RESOURCES +=
resources.qrc

OTHER_FILES +=
whatchado_diy.rc

=====Isuse============
cannot find C:/ffmpeg/lib: Permission denied
cannot find -lavformat
cannot find -lavutil
cannot find -lavcodec
cannot find -lavdevice
cannot find -lswscale
cannot find -lswresample

[SGaist]

Hi and welcome to devnet,

You're missing a -L before C:/ffmpeg/lib so it should be -LC:/ffmpeg/lib

Please note that this forum is community driven and people here are glad to help you sort your problem, but even if you're in a hurry adding !!!URGENGTTTTTTTTTTTTTTT just like that can be considered rude.

If you need urgent and immediate help, you might also consider hiring professional people through e.g. the Qt Company, KDAB, ICS etc.

[Atdhe]

its still got the errors when i add -L befor than i got a bunch off
C:\Users\atdhe\Documents\storyrecorder\videopreview.cpp:10: error: undefined reference to av_register_all' C:\Users\atdhe\Documents\storyrecorder\videopreview.cpp:80: error: undefined reference to avformat_open_input'
C:\Users\atdhe\Documents\storyrecorder\videopreview.cpp:116: error: undefined reference to avcodec_open2' C:\Users\atdhe\Documents\storyrecorder\videopreview.cpp:126: error: undefined reference to avcodec_alloc_frame'
.
.
.
.
.
.

and so on......

[SGaist]

Do you still have the permission error ? Or is it just the symbol missing error ?

[Atdhe]

only the C:\Users\atdhe\Documents\storyrecorder\videopreview.cpp:80: error: undefined reference
... and so on.

[SGaist]

What compiler are you using for your project ? Which one was used to build ffmpeg ? Is your project 32 or 64 bit ? What about ffmpeg ?

[Atdhe]

Compiler->C:\Qt\Tools\mingw492_32\bin\g++.exe
ffmpeg->ffmpeg-2.7-win64-dev
and i am runnig in Windows 8.1 64 bit

[SGaist]

So you are trying to link a 64bit ffmpeg to a 32bit application. That won't work.

[Atdhe]

Thank you i found the solution i needed to copy .dll ffmpeg to my .exe folder.

[SGaist]

And what did you do to solve the compilation error ?

[Atdhe]

Solved -> i adde the avcodec_56.dll and other ffmpeg .dll to my .exe folder and that worked.
Thanks a lot for help.