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• ffmpeg Unrecognized option '—enable-libopus'

  9 juillet 2021, par Irith

  I'm running ffmpeg from a windows 10 machine.

  


  My goal is to trim silence from the beginning to the end of a track (this works just fine) and compress using opus.

  


  I am new in the "audio elaboration" world so maybe I'm not understanding this properly...but the main issue here is that ffmpeg doesn't recognize —enable-libopus although it's clearly in the options (see attachment).

  


  Can anyone help please ?

  


  

  


• How to build ffmpeg for arm ? [on hold]

  11 décembre 2014, par fatsissy

  I have an arm cross compiler on my ubuntu machine and tried to build ffmeg libraries for arm but got the following error

  cd ffmpeg-2.5
  
  ./configure --host=arm-linux-gnueabihf
  
  Unknown option "--host=arm-linux-gnueabihf"

  I did read the ./configure —help file and there is an option "—arch=ARCH" but im not sure how to set this or if its the correct option.
  thanks !

• Yocto depending on header - how to DEPEND it ?

  15 juin 2020, par Janos

  I am including opencv with custom build parameters in my Yocto image. For that I have an opencv_4.1.0.bbappend recipe, in which I set custom options, specifically FFMPEG. The recipe goes something like this :

  



  DEPENDS += "ffmpeg 
EXTRA_OECMAKE_append += "-DWITH_FFMPEG=ON -DWITH_GTK=OFF"  # and some other options


  



  During configure I get cmake errors and can't seem to figure out, how to satisfy the header dependencies. The errors go like this (I assume this is the reason for do_configure to fail) :

  



  CheckIncludeFile.c:1:10: fatal error: /home/janos/dev/yocto/build/tmp/work/core2-64-poky-linux/opencv/4.1.0-r0/recipe-sysroot/usr/include/libpng/png.h: No such file or directory&#xA;    1 | #include janos/dev/yocto/build/tmp/work/core2-64-poky-linux/opencv/4.1.0-r0/recipe-sysroot/usr/include/libpng/png.h>&#xA;&#xA;CheckIncludeFile.c:1:10: fatal error: sys/videoio.h: No such file or directory&#xA;    1 | #include <sys></sys>videoio.h>&#xA;

  



  Focusing on the missing png.h header first, I am tempted to depend libpng-dev, as I also would apt install it. But there is no package for it.

  



  When I search oe-pkgdata-util list-pkg-files -p libpng, I can find the header in a libpng-dev package :

  



  ...
libpng-dev:
    /usr/bin/libpng-config
    /usr/bin/libpng16-config
    /usr/include/libpng16/png.h
    /usr/include/libpng16/pngconf.h
    /usr/include/libpng16/pnglibconf.h
    /usr/include/png.h
    ...
...


  



  I can also find it in libpng-src and also ffmpeg-src package (oe-pkgdata-util find-path "*png.h" was my friend). But all of these -dev and -src packages I cannot depend on in DEPENDS.

  



  How can I get my recipe to know those headers ?

  



  Target machine is raspberrypi4-64, on which the recipe is configuring and compiling well - it fails when I build for qemux86-64, which I use for testing. Namely, my test command is MACHINE="qemux86-64" bitbake opencv.