Recherche avancée

Sur d’autres sites (6107)

• Stop/cancel execution of FFmpeg command

  5 juin 2018, par user155

  There is FFmpeg Static (binary) available for Android and we can stop/cancel some FFmpeg execution (command) while it’s doing something https://github.com/WritingMinds/ffmpeg-android-java/issues/33

  But I want to use FFmpeg shared libraries and JNI, I found next library https://github.com/IljaKosynkin/FFmpeg-Development-Kit (it works ok)

  But there is no option to stop execution of FFmpeg command (or killing the process)

  We use Java native run method there to start execute some command :

  Java :
  https://github.com/IljaKosynkin/FFmpeg-Development-Kit/blob/master/JNI/app/src/main/java/com/example/ilja/jni/VideoKit.java#L57

  and then in C we call FFmpeg’s main method :

  C :
  https://github.com/IljaKosynkin/FFmpeg-Development-Kit/blob/master/JNI/app/jni/videokit.c#L41

  How can I stop/cancel some FFmpeg executing after I called Java run and C main methods ?

• How to build ffmpeg in android app ?

  24 mars 2014, par Sandeep Tiwari

  After successfully build ffmpeg by bellow steps

    http://stackoverflow.com/questions/22471514/ffmpeg-build-output-is-not-showing
  
  
  
    Now I have copy include and all .a file into my JNI folder. and my Android.mk 
  
    file is as:-
  
  
  
  
  
  
  
        LOCAL_PATH := $(call my-dir)
  
  
  
          include $(CLEAR_VARS)
  
  
  
          LOCAL_MODULE    := ffmpegutils
  
         LOCAL_SRC_FILES := tutorial02.c
  
  
  
        LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
  
        LOCAL_LDLIBS := -L$(NDK_PLATFORMS_ROOT)/$(TARGET_PLATFORM)/arch-arm/usr/lib -L$(LOCAL_PATH) -lavformat -lavcodec  -lavfilter -lavutil -lswscale -llog -ljnigraphics -lz -ldl -lgcc
  
  
  
  include $(BUILD_SHARED_LIBRARY)

  but my project giving error as :-

       Description    Resource    Path    Location    Type
  
  make: *** [obj/local/armeabi/libffmpegutils.so] Error 1 MainActivity            C/C++ Problem
  
  undefined reference to 'ANativeWindow_unlockAndPost'    MainActivity        line 231, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function decodeAndRender:jni/tutorial02.c   C/C++ Problem
  
  undefined reference to 'ANativeWindow_lock' MainActivity        line 222, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function decodeAndRender:jni/tutorial02.c   C/C++ Problem
  
  undefined reference to 'ANativeWindow_release'  MainActivity        line 150, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function naSetSurface:jni/tutorial02.c  C/C++ Problem
  
  undefined reference to 'ANativeWindow_setBuffersGeometry'   MainActivity        line 147, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function naSetSurface:jni/tutorial02.c  C/C++ Problem
  
  undefined reference to 'ANativeWindow_fromSurface'  MainActivity        line 145, external location: /home/kiwitech/Documents/development/tools/ndk/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/arm-linux-androideabi/bin/ld: ./obj/local/armeabi/objs/ffmpegutils/tutorial02.o: in function naSetSurface:jni/tutorial02.c  C/C++ Problem

  please anyone help me.

• FFMPEG mixing .wav files volume control [closed]

  1er avril 2024, par JoonSeo Yang

  I am working on Java, using the ffmpeg library with command line processing to mix 2 .wav files into one .wav file, but I would like to know how to control the volume of each original file.

  


  My problem : i have 2 audio files (human voice BGM), but BGM is too loud, so i can barely hear human voice, i would like to -> volume down the BGM file, or volume up voice file

  


  Here is my partial code

  


  String ffmpegCommand = file_exe.getAbsolutePath()
    + String.format(
        " -i %s -i %s -filter_complex amix=inputs=2:duration=first:dropout_transition=3 %s",
        file_1.getAbsolutePath(), file_2.getAbsolutePath(), outputFilePath);
Process process = Runtime.getRuntime().exec(ffmpegCommand);


  


  it is quite simple code. I need help on this, and it would be very thankful to which document to read to get such information

  


  PS.sorry for my poor eng.. Im not native :D

  


  I was wandering around documentations, but its quite hard to find what i want