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• Aubio (aubioonset.exe) on Windows - can't find ffmpeg libraries

  7 octobre 2024, par Peter Wirdemo

  I have installed Aubio on Windows but when trying to use the tools, like aubioonset.exe, I am faced with the following error message :

  


  C:/Peter/aubio/aubio/aubio-0.4.6-win64-ffmpeg/bin/aubioonset.exe: error while loading shared libraries: ?: cannot open shared object file: No such file or directory


  


  I assume it looks after ffmpeg libraries. I have FFmpeg installed and bin-dir added to PATH environment variable. FFMPEG is working flawless globally.

  


  After searching internet for answers to my issue I find "answers" like :
"install chosen libraries (for instance ffmpeg, with header files)"

  


  That vague answer doesn't help me at all. Exactly how do I install ffmpeg libraries, with header files, so that the Aubio-tools can find them ? I need specifics about what environmental-variables must be set - or - should the ffmpeg lib-files be placed in the Aubio Build folder somewhere, or what should I do ?

  


  And after doing that I am supposed to recompile and reinstall Aubio. I can do that.

  


  This is btw. the result from ./waf configure when building my own Aubio-binaries (instead of downloading pre-builds) :

  


  peter@DESKTOP-I0KNADQ MINGW64 /c/Peter/aubio/aubio (master)
$ ./waf configure
Setting top to                           : C:\Peter\aubio\aubio
Setting out to                           : C:\Peter\aubio\aubio\build
Checking for 'msvc' (C compiler)         : C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.16.27023\bin\HostX64\x64\CL.exe
Checking for header stdlib.h             : yes
Checking for header stdio.h              : yes
Checking for header math.h               : yes
Checking for header string.h             : yes
Checking for header errno.h              : yes
Checking for header limits.h             : yes
Checking for header stdarg.h             : yes
Checking for header getopt.h             : not found
Checking for header unistd.h             : not found
Checking for library m                   : not found
Checking for C99 __VA_ARGS__ macro       : yes
Checking for size of smpl_t              : float
Checking for size of lsmp_t              : double
Checking if complex.h is enabled         : no
Checking for FFT implementation          : ooura
Checking for program 'pkg-config'        : not found
Checking for program 'pkg-config'        : not found
Checking for program 'pkg-config'        : not found
Checking for program 'pkg-config'        : not found
Checking for program 'pkg-config'        : not found
Checking for program 'pkg-config'        : not found
Checking for program 'pkg-config'        : not found
Checking for program 'pkg-config'        : not found
Checking for all libav libraries         : not found (missing avcodec)
Checking for program 'pkg-config'        : not found
Checking for program 'pkg-config'        : not found
Checking if using source_wavread         : yes
Checking if using sink_wavwrite          : yes
Checking for program 'txt2man'           : not found
Checking for program 'doxygen'           : not found
Checking for program 'sphinx-build'      : not found
'configure' finished successfully (7.590s)


  


  As can be seen above I have no problem building Aubio without external libraries.

  


  So my guess is that I can go down two different paths for a solution here : either try building with all external libraries somehow prepared (I have tried but can't change the output of ./waf configure no matter what I do. I have cloned the ffmpeg source from github. I can't figure out where ./waf configure is looking for it). Or I can get the precompiled binaries to work, by somehow installing the external libraries.

  


  I have tried both solutions in multiple ways, but fail getting any one of them to work.

  


• How to get non-decoded h264 stream from the webcam using ffmpeg ?

  14 mars 2018, par irobo

  I want to get the file which is non-decoded h264 format to use in another client application. I know how to stream to disk using below command from the docs.

  Example to encode video from /dev/video0 :

  ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i /dev/video0 output.mp4

  High level Diagram

  This is typical producer and consumer problem -

  Webcam  =============> ffmpeg to  video stream into file. (producer)                                    
  
                                         ^
  
                                         |
  
                                         |
  
  Client ________________________________|
  
  (consumer)
  
  // reads only Non-decoded h264 format from a file. 

• How to play FLV file programmatically on iPhone ?

  8 décembre 2017, par HAPPY_TIGER

  I am going to play flv file on iPhone with ffmpeg library.

  The codec of the file is H.264 and video codec is AVC HL.

  Perhaps other ideas without ffmpeg are OK.