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• Android NDK w/ ffmpeg library - error running project

  11 novembre 2014, par ynnadkrap

  Using this guide, http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9/, I successfully compiled ffmpeg-2.4.2 with Android NDK 10, but now I’m having issues using it in my eclipse project.

  The error I’m getting :

  *** Android NDK: Aborting    .  Stop.

  which points to this in prebuilt-library.mk :

  ifndef prebuilt
  
  $(call __ndk_info,ERROR:$(LOCAL_MAKEFILE):$(LOCAL_MODULE): LOCAL_SRC_FILES points to a missing file)
  
  $(call __ndk_info,Check that $(prebuilt_path) exists, or that its path is correct)
  
  $(call __ndk_error,Aborting) <----- ***** This line is specifically pointed out by the error log
  
  endif

  Here’s my ...jni/Android.mk :

  LOCAL_PATH := $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  
  
  LOCAL_MODULE    := VideoTest
  
  LOCAL_SRC_FILES := videotest.c
  
  LOCAL_LDLIBS := -llog -ljnigraphics -lz -landroid
  
  LOCAL_SHARED_LIBRARIES := libavformat libavcodec libswscale libavutil
  
  
  
  include $(BUILD_SHARED_LIBRARY)
  
  $(call import-module,ffmpeg-2.4.2/android/arm)

  Here’s my android-ndk/sources/ffmpeg-2.4.2/android/arm/Android.mk :

  LOCAL_PATH:= $(call my-dir)
  
  
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavcodec
  
  LOCAL_SRC_FILES:= lib/libavcodec-55.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavformat
  
  LOCAL_SRC_FILES:= lib/libavformat-55.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libswscale
  
  LOCAL_SRC_FILES:= lib/libswscale-2.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavutil
  
  LOCAL_SRC_FILES:= lib/libavutil-52.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavfilter
  
  LOCAL_SRC_FILES:= lib/libavfilter-3.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libwsresample
  
  LOCAL_SRC_FILES:= lib/libswresample-0.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)

  Here’s my project structure :

  http://imgur.com/2vMryOS

  So it seems to me that the project isn’t building because the LOCAL_SRC_FILES doesn’t point to anything, but is it referring to LOCAL_SRC_FILES in jni/Android.mk or the one in ...ffmpeg-2.4.2/android/arm/Android.mk ? Either way, it seems like they are actually pointing to something. I’ve also tried looking at this solution, Android NDK : Aborting stop ?, but I’m having a hard time understanding it. Which Android.mk file needs changing ?

• Loading shared libraries for FFmpeg in macOS

  12 août 2020, par aleksid1

  Why is ffmpeg looking for shared libraries in a folder where I compiled FFmpeg sources on macOS Catalina ?

  


  Source code of FFmpeg is located in /usr/local/Cellar/ffmpeg

  


  ./configure --enable-shared --extra-cflags="-fno-stack-check" --enable-gpl  --enable-version3 --enable-pthreads --enable-nonfree && make


  


  I compile FFmpeg and then put all shared libraries and small ffmpeg binary file to a folder : /Users/aleks/test/

  


  I call ./ffmpeg

  


  Library not loaded: /usr/local/Cellar/ffmpeg/lib/libavdevice.58.dylib
Referenced from: /Users/aleks/test/./ffmpeg
Reason: image not found


  


• Feeding multiple sample rates to the same buffer source : ffmpeg filters

  30 juillet 2020, par samofoz

  I have a remote source of PCM audio samples which keeps changing the sample rate. It sometimes supplies 16Khz and the later 48Khz depending upon the bandwidth. I would like to convert them to FLTP through a filter, before feeding to an audio decoder. When I do that I get the error "Changing audio frame properties on the fly is not supported. [Invalid argument]".

  


  Can someone please suggest a way this can be done ?

  


  Is it possible to create a filter graph with multiple buffer sources but only one sink ?