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• License terms for H.264 using x264 [closed]

  22 novembre 2014, par user3027650

  H.264 is standard for video compression and uses a lot of patents. So if anybody want to use the standard he has to pay a fee to MPEGLA.

  x264 is a free software library (GNU GPL) which implements (parts of) H.264.

  Why is it possible that x264 is free, if it implements H.264 it violates the patents or doesn’t it ? This means I can distribute my application which uses x264 and consequently H.264 commercially without paying MPEGLA ?

• Error : mingw32/bin/ld.exe : cannot find -lavformat when compiling goav

  18 avril 2018, par nevernew

  I’m trying to compile goav on Windows and I’ve got quite far I’ve compiled the ffmpeg libraries in MSYS2 and linked the packages with :

  set CGO_CFLAGS=-IC:\path\to\FFmpeg\
  
  set PKG_CONFIG_PATH=%~dp0FFmpeg\libavformat;%~dp0FFmpeg\libavcodec;%~dp0FFmpeg\libavutil;%~dp0FFmpeg\libswresample;

  which has worked !

  However, I’m now getting the error could not determine kind of name for ...

  Here’s the whole error list :

  # github.com/giorgisio/goav/avcodec
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:57:52: could not determine kind of name for C.AV_CODEC_ID_ADPCM_VIMA_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:93:52: could not determine kind of name for C.AV_CODEC_ID_BRENDER_PIX_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:131:52: could not determine kind of name for C.AV_CODEC_ID_ESCAPE130_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:134:52: could not determine kind of name for C.AV_CODEC_ID_EXR_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:151:52: could not determine kind of name for C.AV_CODEC_ID_G2M_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:164:52: could not determine kind of name for C.AV_CODEC_ID_HEVC_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:211:52: could not determine kind of name for C.AV_CODEC_ID_MPEG2VIDEO_XVMC
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:228:52: could not determine kind of name for C.AV_CODEC_ID_MVC1_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:230:52: could not determine kind of name for C.AV_CODEC_ID_MVC2_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:237:52: could not determine kind of name for C.AV_CODEC_ID_OPUS_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:240:52: could not determine kind of name for C.AV_CODEC_ID_PAF_AUDIO_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:242:52: could not determine kind of name for C.AV_CODEC_ID_PAF_VIDEO_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:262:52: could not determine kind of name for C.AV_CODEC_ID_PCM_S24LE_PLANAR_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:266:52: could not determine kind of name for C.AV_CODEC_ID_PCM_S32LE_PLANAR_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:311:52: could not determine kind of name for C.AV_CODEC_ID_SANM_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:314:52: could not determine kind of name for C.AV_CODEC_ID_SGIRLE_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:338:52: could not determine kind of name for C.AV_CODEC_ID_TAK_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:373:52: could not determine kind of name for C.AV_CODEC_ID_VIMA
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:379:52: could not determine kind of name for C.AV_CODEC_ID_VOXWARE
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:386:52: could not determine kind of name for C.AV_CODEC_ID_VP7_DEPRECATED
  
  source\src\github.com\giorgisio\goav\avcodec\codecs.go:392:52: could not determine kind of name for C.AV_CODEC_ID_WEBP_DEPRECATED
  
  compilation failed.
  
  exit code 2

  How can I fix this so it can finish compiling ?

  More Errors :

  I commented out those lines in the source file to see if I could continue, but now I’m getting all these errors, Obviously I’m missing some step, does anyone have any insight ?

  # github.com/giorgisio/goav/avcodec
  
  c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lavformat
  
  c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lbz2
  
  c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lavcodec
  
  c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lz
  
  c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lswresample
  
  c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lavutil
  
  c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lbcrypt
  
  collect2.exe: error: ld returned 1 exit status
  
  # github.com/giorgisio/goav/avcodec
  
  cgo-gcc-prolog: In function '_cgo_3a37b7d41a30_Cfunc_av_codec_get_max_lowres':
  
  cgo-gcc-prolog:40:2: warning: 'av_codec_get_max_lowres' is deprecated [-Wdeprecated-declarations]
  
  In file included from C:\Users\chris\Documents\videoplayer\FFmpeg/libavformat/avformat.h:319:0,
  
                   from source\src\github.com\giorgisio\goav\avcodec\avcodec.go:14:
  
  C:\Users\chris\Documents\videoplayer\FFmpeg/libavcodec/avcodec.h:3554:5: note: declared here
  
   int av_codec_get_max_lowres(const AVCodec *codec);
  
       ^~~~~~~~~~~~~~~~~~~~~~~
  
  cgo-gcc-prolog: In function '_cgo_3a37b7d41a30_Cfunc_av_codec_next':
  
  cgo-gcc-prolog:91:2: warning: 'av_codec_next' is deprecated [-Wdeprecated-declarations]
  
  In file included from C:\Users\chris\Documents\videoplayer\FFmpeg/libavformat/avformat.h:319:0,
  
                   from source\src\github.com\giorgisio\goav\avcodec\avcodec.go:14:
  
  C:\Users\chris\Documents\videoplayer\FFmpeg/libavcodec/avcodec.h:4045:10: note: declared here
  
   AVCodec *av_codec_next(const AVCodec *c);
  
  ....

• Video Codec For Commercial Use [on hold]

  17 décembre 2015, par mFeinstein

  I am new in video programming and I need to make a commercial application that needs to export some video. I was going to use OpenCV, but the documentation says it can’t write a video larger than 2Gb and that’s not something that my project can tolerate.

  I have an industrial camera and I will receive each frame of the camera in my C++ code and I want to transform the frames in a video. So far I am thinking about using FFmpeg for the video generation, but I am afraid of all these patented codecs.

  Are there any codecs that are free for commercial use ?

  Edit :

  Some are flaging this post as not related to programing or opinion based.

  1. I am not asking for an opinion, but a list of commercial free codecs. I am not asking which are good or bad (which is opinion based) I just can’t find a list online.

  2. This is about programing, there are lots of posts here in SO about legal issues on software like licensing, there is even one with a "legal" tag. I found many posts related to codecs licenses but none with a list of free ones. Of course this is programing related, I will develop and architecture my code around my options.