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• Unable to link QtFFmpegWrapper sample on Win7 with VS 2012

  20 juillet 2014, par mschwarz

  I am trying to incorporate QtFFmpegWrapper in my program, but both my program and the provided sample won’t link with ffmpeg :

  QVideoEncoder.obj:-1: Error: LNK2019: unresolved external symbol _avcodec_init referenced in function "protected: bool __thiscall QVideoEncoder::initCodec(void)" (?initCodec@QVideoEncoder@@IAE_NXZ)
  
  QVideoDecoder.obj:-1: Error: LNK2001: unresolved external symbol _avcodec_init
  
  QVideoEncoder.obj:-1: Error: LNK2019: unresolved external symbol _avcodec_thread_init referenced in function "public: bool __thiscall QVideoEncoder::createFile(class QString,unsigned int,unsigned int,unsigned int,unsigned int,unsigned int)" (?createFile@QVideoEncoder@@QAE_NVQString@@IIIII@Z)
  
  QVideoEncoder.obj:-1: Error: LNK2019: unresolved external symbol _avcodec_open referenced in function "public: bool __thiscall QVideoEncoder::createFile(class QString,unsigned int,unsigned int,unsigned int,unsigned int,unsigned int)" (?createFile@QVideoEncoder@@QAE_NVQString@@IIIII@Z)

  and 10 or so more like these ...

  Why do these pop up when linking ? The libs are all there and found, it just seems like the linker has issues with them ...

  I use the following setup for my project :

  • Latest QtFFmpegWrapper from https://code.google.com/p/qtffmpegwrapper/
  • qt-opensource-windows-x86-msvc2012_opengl-5.3.0
  • Visual Studio 2012 Professional
  • Qt Creator 3.1.2
  • ffmpeg builds from http://ffmpeg.zeranoe.com/builds/ :
  • ffmpeg-20140717-git-fa6716c-win32-dev
  • ffmpeg-20140717-git-fa6716c-win32-shared

  Everything is 32Bit.

• FFMPEG Failure - Extracting frames on large file

  25 avril 2018, par Marian Montagnino

  Calling the ffmpeg command :

  ffmpeg -y -ss "00:00:02" -i 5ccaea226acfc1b4b75ccd1a9f09512c.mxf -frames 30 -f image2 -vf "fps=1/1.25,scale='min(420,iw)':-1" video%04d.jpg

  Causes a failure :

  ffmpeg failed: ffmpeg version N-85692-g78a5fc4 Copyright (c) 2000-2017 the FFmpeg developers
  
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
  
  configuration: --prefix=/tmp/gm-ffmpeg-1.0.4/BUILD/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/tmp/gm-ffmpeg-1.0.4/BUILD/ffmpeg_build/include --extra-ldflags=-L/tmp/gm-ffmpeg-1.0.4/BUILD/ffmpeg_build/lib --bindir=/tmp/gm-ffmpeg-1.0.4/BUILDROOT/gm-ffmpeg-1.0.4-1.el7.centos.x86_64/opt/graymeta/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
  
  libavutil 55. 61.100 / 55. 61.100
  
  libavcodec 57. 93.100 / 57. 93.100
  
  libavformat 57. 72.101 / 57. 72.101
  
  libavdevice 57. 7.100 / 57. 7.100
  
  libavfilter 6. 87.100 / 6. 87.100
  
  libswscale 4. 7.101 / 4. 7.101
  
  libswresample 2. 8.100 / 2. 8.100
  
  libpostproc 54. 6.100 / 54. 6.100
  
  [mxf @ 0x2c6da60] broken or empty index
  
  Input #0, mxf, from '/alloc/5ccaea226acfc1b4b75ccd1a9f09512c.mxf':
  
  Metadata:
  
  uid : 27b07007-2dc8-4305-a78a-81a612d78b94
  
  generation_uid : ef5ae870-4075-4513-ea1f-39c0ed197267
  
  company_name : Colorfront
  
  product_name : Transkoder
  
  product_uid : 3a4fe380-0d01-11e4-869f-3cd92b5c1dfc
  
  product_version : 2.7.3.20150121
  
  application_platform: Microsoft Windows 7 Professional Service Pack 1 (Build 7601)
  
  modification_date: 2016-09-09T11:29:39.000000Z
  
  material_package_umid: 0x060A2B340101010501010F20130000008991E1DCEA584837149E72E7F9F0E09D
  
  timecode : 00:00:17;12
  
  Duration: 00:11:58.92, start: 0.000000, bitrate: 150802 kb/s
  
  Stream #0:0: Video: jpeg2000, yuv422p10le(progressive), 3840x2160, SAR 1:1 DAR 16:9, 59.94 fps, 59.94 tbr, 59.94 tbn, 59.94 tbc
  
  Metadata:
  
  file_package_umid: 0x060A2B340101010501010F2013000000F8B3B48BE8044408DDD6303A6D43F566
  
  track_name : Picture
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (jpeg2000 (native) -> mjpeg (native))
  
  Press [q] to stop, [?] for help
  
  : signal: killed

  I’m not sure how to interpret this error message and why it actually failed. This file is about 90GB large and shot in 4K resolution but 11 seconds long.

• Install ffmpeg on Centos6 x64 using FFmpegInstaller 8.0 Issue [on hold]

  21 mars 2017, par woshka

  I have the following issue while installing ffmpeginstaller8.0 on centos 6 x64
  on the mplayer installtion it fails as followes on cpu.c
  what is the issue and how to solve it ?

  Thanks

  EDIT : I have found the best solution to install ffmpeg and all of it’s libraries with this link enter link description here

  YASM    libavcodec/x86/vp9lpf_16bpp.o
  
  YASM    libavcodec/x86/vp9itxfm_16bpp.o
  
  YASM    libavcodec/x86/vp9lpf.o
  
  YASM    libavcodec/x86/hevc_mc.o
  
  YASM    libavcodec/x86/vp9itxfm.o
  
  AR      libavcodec/libavcodec.a
  
  make[1]: Leaving directory `/usr/src/ffmpegscript/mplayer/ffmpeg'
  
  make -C ffmpeg libavutil/libavutil.a
  
  make[1]: Entering directory `/usr/src/ffmpegscript/mplayer/ffmpeg'
  
  CC      libavutil/cpu.o
  
  libavutil/cpu.c:20:23: warning: stdatomic.h: No such file or directory
  
  libavutil/cpu.c:28:5: warning: "HAVE_SCHED_GETAFFINITY" is not defined
  
  libavutil/cpu.c:34:5: warning: "HAVE_GETPROCESSAFFINITYMASK" is not defined
  
  libavutil/cpu.c:34:36: warning: "HAVE_WINRT" is not defined
  
  libavutil/cpu.c:37:5: warning: "HAVE_SYSCTL" is not defined
  
  libavutil/cpu.c:48: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'cpu_flags'
  
  libavutil/cpu.c: In function 'av_force_cpu_flags':
  
  libavutil/cpu.c:86: error: implicit declaration of function 'atomic_store_explicit'
  
  libavutil/cpu.c:86: error: 'cpu_flags' undeclared (first use in this function)
  
  libavutil/cpu.c:86: error: (Each undeclared identifier is reported only once
  
  libavutil/cpu.c:86: error: for each function it appears in.)
  
  libavutil/cpu.c:86: error: 'memory_order_relaxed' undeclared (first use in this function)
  
  libavutil/cpu.c: In function 'av_get_cpu_flags':
  
  libavutil/cpu.c:91: error: implicit declaration of function 'atomic_load_explicit'
  
  libavutil/cpu.c:91: error: 'cpu_flags' undeclared (first use in this function)
  
  libavutil/cpu.c:91: error: 'memory_order_relaxed' undeclared (first use in this function)
  
  libavutil/cpu.c: In function 'av_set_cpu_flags_mask':
  
  libavutil/cpu.c:101: error: 'cpu_flags' undeclared (first use in this function)
  
  libavutil/cpu.c:102: error: 'memory_order_relaxed' undeclared (first use in this function)
  
  libavutil/cpu.c:265:5: warning: "HAVE_WINRT" is not defined
  
  libavutil/cpu.c:268:5: warning: "HAVE_SCHED_GETAFFINITY" is not defined
  
  libavutil/cpu.c:275:7: warning: "HAVE_GETPROCESSAFFINITYMASK" is not defined
  
  libavutil/cpu.c:279:7: warning: "HAVE_SYSCTL" is not defined
  
  libavutil/cpu.c:285:7: warning: "HAVE_SYSCONF" is not defined
  
  libavutil/cpu.c:287:7: warning: "HAVE_SYSCONF" is not defined
  
  libavutil/cpu.c:289:7: warning: "HAVE_WINRT" is not defined
  
  make[1]: *** [libavutil/cpu.o] Error 1
  
  make[1]: Leaving directory `/usr/src/ffmpegscript/mplayer/ffmpeg'
  
  make: *** [ffmpeg/libavutil/libavutil.a] Error 2
  
  cp: cannot create regular file `/usr/local/cpffmpeg/etc/mplayer/codecs.conf': No such file or directory
  
  Installation of mplayer.tar.gz ....... Completed
  
  
  
  
  
     Mplayer installation Failed :( ,  please contact  professional support sales@syslint.com