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• 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.

• 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.

• Run 3 Docker images together as a single service

  20 juin 2018, par kitce

  I want to run 3 Docker images as a single service. They are the official nginx, jrottenberg/ffmpeg and a custom image.

  The custom image will return video files for HTTP requests on port 80, e.g. http:////video.mp4.

  I want to make the video files available for HLS in M3U8 playlist (or other better formats ?).

  The main idea is as follows :

  • Encode video.mp4, output video.m3u8 and segment files with ffmpeg
  • Serve the video.m3u8 and segment files with Nginx
  • The final and the only available web service of the container is http:///.m3u8.
  • Encode only when someone is requesting it (i.e. trigger the encoding when the first request comes, stop encoding and delete segment files when nobody requests it)

  I tested the HLS part with ffmpeg and it works. I am just not sure about how to put Nginx and ffmpeg to work together.