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• Compile FFMPEG Using Eclipse Android

  3 septembre 2013, par Ivelius

  NDK experts , I need your help...

  My goal is to easily compile ffmpeg library using android NDK and eclipse.

  What I usally do when I want to develop using NDK , is right click on android project in eclipse ->Android Tools -> Add Native support. And Everything works and compiles.
  Every time I want to build my project , I just hit "Build" button (with a hammer icon on it).

  Now I just need to add all ffmpeg libraries and run a simple program like this.
  I downloaded latest ffmpeg libraries from official website.I've extracted downloaded content into JNI library . And when I try to build , I get countless errors. Something like
  "fatal error : libavutil/avconfig.h : No such file or directory" ...

  My Android.mk file looks like this :

  LOCAL_PATH := $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  include $(call all-subdir-makefiles)
  
  
  
  LOCAL_MODULE    := HELLONDK
  
  LOCAL_SRC_FILES := hello-ndk.cpp
  
  
  
  include $(BUILD_SHARED_LIBRARY)

  EDIT :
  I've been looking for a solution for a few days before posting this question.

• Unknown input format : 'x11grab'

  5 juillet 2017, par jjh

  guys :

  I have problems when i compile ffmpeg and run ffmpeg in linux.

  My environment :

  1 : ubuntu 17.10_x64_bit(i don’t think the os version is the key)

  2 : gcc (Ubuntu 6.3.0-19ubuntu1) 6.3.0 20170618

  3 : ffmpeg open source code:3.2

  first, i download the source code from ffmpeg official site. I compile this project with there instructions：

  ./configure --prefix=/home/jjh/software/ffmpeg --enable-shared
  
  make
  
  make install

  and it worked without any error except some warning, then i run :

  ./ffmpeg -h

  i make sure that it works and output normally.

  but i want use ffmpeg to grabbing screen. so i use this construction(o) :

  ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0 /tmp/out.mpg

  then output error :

  Unknown input format: 'x11grab'

  i want to re-compile this project with —enable-x11grab option, btw , so many solution tell me to to this. but when i add this option, i get some errors :

  Invalid option --enable-x11grab

  some people says that i should install some libs :

  libxfixes-dev
  
  sudo apt-get install libxext-dev

  so i installed these libs, but it always show this error. pls help me.

• FFMpeg, rtsp cameras and series of bad framses

  21 avril 2022, par Denis Gottardello

  I have a problem with ffmpeg and rtsp cameras.
As you can see in the screenshot below

  


  

  


  sometimes a serie of damaged frames come.
It is not a problem related to camera. The date and time is unreadable and the problem happens with different vendors of camera, with differen pcs and in different places.With the official software the live is perfect.
I'm trying with the lates ffmpeg source (5.0.1) in a Debian 11 machine.
I'm particolar intertested in this problem because I have written a software based on ffpmeg library and I have the same problem (using ffmpeg as library), in bouth Windows and Linux.

  


  This is the command line to record

  


  


  


  ./ffmpeg -i rtsp://192.168.1.11:554/onvif1  a.avi

  


  


  



  What can I do to resolve ?