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• Adding a bitmap over video using ffmpeg for android

  11 septembre 2014, par Alin

  I am stuck in this area which I am not comfortable at all to work in.

  Here is what I did so far :

  • Made an Ubuntu VirtualBox machine
  • Downloaded latest ffmpeg version which is 2.3.3
  • Compiled ffmpeg to be compatible with armv7-a so in the end I get two folders : include and lib. In include I have the headers and in libs the *.so files (just as in http://www.roman10.net/how-to-build-ffmpeg-with-ndk-r9/)

  

  I have created a new android project and made a jni folder and this is how far I went... Even this, with all the struggle being new to linux and compiling took me almost a week to reach.

  Adding a watermark in ffmpeg I believe it is done on libavfilter ? I have to dig on this matter, however the original ffmpeg I need to translate into my project is :

  ffmpeg -i input.avi -i logo.png -filter_complex 'overlay=10:main_h-overlay_h-10' output.avi

  As far as I am studying now I need to do inside jni :

  • create a add_watermark.c file in which I need to somehow call the function that does the filter overlay call

  • create Android.mk to load this and the ffmpeg needed libraries

    LOCAL_PATH := $(call my-dir)

    include $(CLEAR_VARS)

    LOCAL_MODULE := add-watermark

    LOCAL_SRC_FILES := add-watermark.c

    LOCAL_LDLIBS := -llog -ljnigraphics -lz

    LOCAL_SHARED_LIBRARIES := libavformat libavcodec libswscale libavutil

    include $(BUILD_SHARED_LIBRARY)

    $(call import-module,ffmpeg-2.3.3/android/armv7-a)

  • create Application.mk

    APP_ABI := armeabi-v7a

    APP_PLATFORM := android-8

  • run ndk-build and use the generated libraries in my android project.

  I really need help on continuing, so every answer is received with great attention and pleasure.

  Later Edit :
  Would it be possible to somehow build ffmpeg.exe as a library and call its main with the exact same parameters as the original exe ? I do not want to run ffmpeg as a standalone executable, but have it integrated within the project. Something like http://www.roman10.net/how-to-port-ffmpeg-the-program-to-androidideas-and-thoughts/ What downsides would this approach have ?

• Revision 5acfafb18e : Adds config opt for highbitdepth + misc. vpx Adds config parameter vp9_highbitd

  26 août 2014, par Deb Mukherjee

  Changed Paths :
   Modify /configure

  
   Modify /test/md5_helper.h

  
   Modify /test/y4m_test.cc

  
   Modify /tools_common.c

  
   Modify /vp8/vp8_cx_iface.c

  
   Modify /vp9/common/vp9_alloccommon.c

  
   Modify /vp9/common/vp9_common.h

  
   Modify /vp9/common/vp9_enums.h

  
   Modify /vp9/common/vp9_onyxc_int.h

  
   Modify /vp9/decoder/vp9_decodeframe.c

  
   Modify /vp9/decoder/vp9_decoder.c

  
   Modify /vp9/encoder/vp9_bitstream.c

  
   Modify /vp9/encoder/vp9_denoiser.c

  
   Modify /vp9/encoder/vp9_denoiser.h

  
   Modify /vp9/encoder/vp9_encoder.c

  
   Modify /vp9/encoder/vp9_encoder.h

  
   Modify /vp9/encoder/vp9_lookahead.c

  
   Modify /vp9/encoder/vp9_lookahead.h

  
   Modify /vp9/encoder/vp9_temporal_filter.c

  
   Modify /vp9/vp9_cx_iface.c

  
   Modify /vp9/vp9_dx_iface.c

  
   Modify /vpx/src/vpx_image.c

  
   Modify /vpx/vp8dx.h

  
   Modify /vpx/vpx_codec.h

  
   Modify /vpx/vpx_encoder.h

  
   Modify /vpx/vpx_image.h

  
   Modify /vpx_mem/vpx_mem.c

  
   Modify /vpx_mem/vpx_mem.h

  
   Modify /vpx_scale/generic/yv12config.c

  
   Modify /vpx_scale/generic/yv12extend.c

  
   Modify /vpx_scale/yv12config.h

  
   Modify /vpxdec.c

  
   Modify /vpxenc.c

  
  
  Adds config opt for highbitdepth + misc. vpx

  Adds config parameter vp9_highbitdepth, to support highbitdepth profiles.
  Also includes most vpx level high bit-depth functions. However
  encode/decode in the highbitdepth profiles will not work until
  the rest of the code is in place.

  Change-Id : I34c53b253c38873611057a6cbc89a1361b8985a6

• How to merge two audio files and remove their overlap [closed]

  14 septembre 2024, par jackiechan Zebra

  I have two mp3 files, there have some overlap. The last few seconds, normally less than 2 second, of the first file are always appear on the first few seconds of the last file.

  


  How can I conbine the two audio files into one and eliminate the overlap part ?

  


  

  1. Currently, audio files are mp3.

  


  2. Expecting a python lib. I know FFMPEG may work, but I have no experience.

  


  3. Other programming languages solution are also fine.

  


  


  Give me some keywords and I hope I can do the rest.