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• convert CCTV .264 video to one of common formats (mp4, avi, etc.) via ffmpeg or other cmdline tool

  21 mars 2016, par yy502

  I’ve got a CCTV cam that produces .264 format video clips. These clips plays fine just like any other normal video recording that you would expect on portable devices, but only with it’s manufacture provided App. When played directly using VLC or mplayer, only gray blocks are visible in the picture. I doubt it is propitiatory encoding, but some kind of hardware encoded raw h264 format that I’m just lacking the right combination of arguments/options for playback or convert using ffmpeg. ffmpeg -i does report the basic metadata correctly, but also crazy amount of frame errors.... but I know the video can be played fine.

  The Android App has the following files in its lib folder :
  

  I understand these files are not all for video decoding but also some other feature in the app. I’m just hoping someone could maybe determine what extra lib or option is needed to convert it with ffmpeg. e.g. libh264ToRGB565.so could be useful maybe...?

  This is a screenshot of what to expect from the sample video.
  

  And here is the sample video clip (1.3M, 1280x720p) : http://146.185.145.75/vid.264
  (MD5 = 0ae871484b3832984f46e6820b21c673)

  Any suggestion is appreciated.

• How do I fix "undefined reference" errors in my Qt-Creator project while linking the ffmpeg library "libav" ?

  25 décembre 2022, par VCoder12345

  I'm currently trying to use the libav library from FFmpeg in my Qt-Creator project, but I get over a thousand "undefined reference to ..." errors and I have no idea what I'm doing wrong. The errors don't depend on the actual code, because I changed it a few times, but as long as I use methods of the library these errors occur.
I have also tried to run the code in Visual Studio and that worked.

  


  My project-file looks like this :

  


  QT -= gui

CONFIG += c++11 console
CONFIG -= app_bundle

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
INCLUDEPATH += D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\include

SOURCES += \
    Main.cpp

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

QMAKE_CXXFLAGS += -D__STDC_CONSTANT_MACROS

LIBS += -lMfuuid
LIBS += -lStrmiids
LIBS += -lMfplat
LIBS += -lBcrypt
LIBS += -lSecur32
LIBS += -lWs2_32
LIBS += -pthread
LIBS += -L"D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib"
LIBS += -lavdevice
LIBS += -lavfilter
LIBS += -lavformat
LIBS += -lavcodec
LIBS += -lswresample
LIBS += -lswscale
LIBS += -lavutil

HEADERS += \
    wrapper.h


  


  The library files are stored at D :\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib. The errors I get when running the program look something like this (extract).

  


  :-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/aviobuf.o):(.text$mn+0x16): undefined reference to `__security_cookie'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/aviobuf.o):(.xdata[$unwind$ff_read_string_to_bprint_overwrite]+0x1c): more undefined references to `__GSHandlerCheck' follow
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/4xm.o):(.text$mn+0x250): undefined reference to `__security_check_cookie'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/yuv4mpegdec.o):(.text$mn+0x2fe): undefined reference to `sscanf'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/yuv4mpegdec.o):(.text$mn+0x33f): undefined reference to `sscanf'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/yuv4mpegdec.o):(.text$mn+0x65b): undefined reference to `__report_rangecheckfailure'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/yuv4mpegdec.o):(.text$mn+0x18): undefined reference to `__security_cookie'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/yuv4mpegdec.o):(.text$mn+0x97): undefined reference to `__security_check_cookie'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/yuv4mpegdec.o):(.text$mn+0x14d): undefined reference to `__report_rangecheckfailure'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/yuv4mpegdec.o):(.xdata[$unwind$yuv4_read_header]+0x20): undefined reference to `__GSHandlerCheck'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/yuv4mpegdec.o):(.xdata[$unwind$yuv4_read_packet]+0x18): undefined reference to `__GSHandlerCheck'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/xwma.o):(.text$mn+0x14): undefined reference to `__security_cookie'
:-1: Fehler: D:\Programme\ffmpeg-source\ffmpeg-5.1.2\vs2019_build\lib/libavformat.a(libavformat/xwma.o):(.text$mn+0x2e0): undefined reference to `__security_check_cookie'
...


  


  Is a library missing ? Am I including the lMfuuid, Strmiids, Mfplat, etc. the wrong way ? If you have any idea I would be very grateful. I'm really confused. I'm using the MinGW64 compiler.

  


• Revision 30295 : Amélioration de l’encodage multiple

  28 juillet 2009, par kent1@… — Log

  Amélioration de l’encodage multiple