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• You should apply for x264 Google Summer of Code

  3 avril 2011, par Dark Shikari — development, GSOC, x264

  Want to do some fun open source work and get paid ? You should apply for GSOC. Check out our ideas page and the official Google page.

  (And yes, I’ll get around to approving the queued comments and writing more real posts. Eventually ! I promise !)

• Video tube site on wordpress dedicated server mp4 only streams on android firefox

  9 mai 2015, par Steven Minix

  I have a video tube site that is quite popular and I am having an issue with my mp4 files streaming on android devices. When using Mozilla Firefox on android my videos play and seek perfectly. When using google chrome or default Android browser they do not play at all. I ran one of my videos through mp4box with a few settings and I got it to play on those browser in Android but they break when trying to seek. So at this stage the videos still play fine on Firefox in Android but now even though the video will start playing rather quickly on the other two browsers the videos will not seek properly as seeking will cause the video to break and restart itself. I am in a wordpress installation on a dedicated server.

  server specs:
  
  PHP 5.2.4 or greater
  
  MySQL 5.0 or greater
  
  PHP cURL extension
  
  PHP Zlib extension
  
  Unix-like OS (Windows is not supported)
  
  PHP 5.3, 5.4, 5.5 yes
  
  IonCube Loader 4.6.1 or above yes
  
  Mysql 5.0 or above and its support in PHP yes
  
  FFmpeg 1.0 or above with libx264, libavfilter and AAC codec (libfaac, libfdk_aac or native ffmpeg aac codec) yes
  
  cURL and its support in PHP yes
  
  Apache + mod_rewrite + (MultiViews option disabled) yes, not sure about multi views, please ask how this is done.
  
  Zlib library yes
  
  XML extension yes
  
  GD2 with true type font (required!) yes
  
  Ability to exec PHP from CLI using exec() command yes
  
  PHP register_globals off yes
  
  PHP magic_quotes_gpc off yes
  
  PHP safe_mode off yes
  
  PHP file_uploads on yes
  
  PHP allow_url_fopen on yes

  The files are MP4 with the meta data at the front of the file and playing in the standard wordpress video player(or any html5 based player as I have tried quite a few and all have the same result)

  I had to ask my server admin to install ffmpeg for my streaming is it possible they did not add the right commands ?

  I have no idea what my videos are doing on Apple devices but I assume it is okay since Google Analytics shows a low bounce rate from that devices.

  If any issue is on service side I want to contact them armed with facts. I appreciate your help in this matter.

  EDIT : FFMPEG SERVER CONFIGURATION :
  root@dwhsv160 [ /ffmpeginstaller.8.0]# ffmpeg -version
  ffmpeg version N-71403-g415f1fa-syslint Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)
  configuration : —prefix=/usr/local/cpffmpeg —enable-shared —enable-nonfree —enable-gpl —enable-pthreads —enable-libopencore-amrnb —enable-decoder=liba52 —enable-libopencore-amrwb —enable-libfaac —enable-libmp3lame —enable-libtheora —enable-libvorbis —enable-libx264 —enable-libxvid —extra-cflags=-I/usr/local/cpffmpeg/include/ —extra-ldflags=-L/usr/local/cpffmpeg/lib —enable-version3 —extra-version=syslint
  libavutil 54. 22.101 / 54. 22.101
  libavcodec 56. 34.100 / 56. 34.100
  libavformat 56. 30.100 / 56. 30.100
  libavdevice 56. 4.100 / 56. 4.100
  libavfilter 5. 13.101 / 5. 13.101
  libswscale 3. 1.101 / 3. 1.101
  libswresample 1. 1.100 / 1. 1.100
  libpostproc 53. 3.100 / 53. 3.100

  The few things I tried with the mp4 that got them to play but still not seek properly were running them through mp4box with no special settings and simply remuxing them. I also tried a couple special settings like adding a hint track and other things none resulted in the file streaming properly in chrome or default android browser. AGAIN my files stream fine on all desktops and in FIREFOX on android but DO NOT work in chrome on android or default android browser.

• How to get Updated Shared Object Files of OpenCV and FFMPEG libraries to overcome Libpng vulnerability ? [duplicate]

  3 mars 2017, par Liya

  This question already has an answer here :

  • Libpng vulnerability
    
    2 answers
    

  We seek a technical help on a current issue which we are facing with one of our android application.

  Our application is for live video streaming and recording (both audio and video) using wifi camera . We have completed the development process and every functionality of the application is working as expected in current version. but once we tried to upload the application to Google has rejected the application stating that vulnerability issue with Libpng library version.

  Our application uses OpenCV, FFMPEG, JavaCV and JavaCPP libraries for Image processing for Video generation. But when we tried to upload to play store google have rejected application with following message :

  “ Hello Google Play Developer,

  We rejected Application name, for violating our Malicious Behavior or
  User Data policy. If you submitted an update, the previous version of
  your app is still available on Google Play.

  This app uses software that contains security vulnerabilities for
  users or allows the collection of user data without proper disclosure.

  Below is the list of issues and the corresponding APK versions that
  were detected in your recent submission. Please upgrade your app(s) as
  soon as possible and increment the version number of the upgraded APK.

  Vulnerability APK Version(s) Libpng library

  The vulnerabilities were fixed in libpng v1.0.66, v.1.2.56, v.1.4.19,
  v1.5.26 or higher. You can find more information about how resolve the
  issue in this Google Help Center article.”

  Since we have not used libpng library directly in our application we assume the problem is with opencv lib version which may be using libpng , so we replaced the opencv jar file with its gradle dependency and .so files of different libraries are combined in an armeabi.jar file and once we deleted the .so files from libs/armeabi.jar folder and uploaded to play store, then Google didn’t rejected with vulnerability issue and it got uploaded to the play store but the recording isn’t working in that version because we have removed the .SO files from the Project.

  So as per our assumptions the libpng vulnerability is not only due to opencv but also due to the other libraries or the .so files .So please kindly suggest us which all .SO files we can remove from the library , so our application functionality for video recording works properly .

  We tried to update the OpenCV, FFMPEG libraries and since the SO files are not getting regenerated so could not resolve this issue yet

  We already refer following links to find a solution :

  1. libpng-vulnerability

  2. opencv-in-android

  3. FFmpegAndroid

  For more information please read our stackover flow post regarding this issue :Libpng vulnerability

  We need help to solve this issue. Please let us know if you can help us to solve this issue since we are running out of time.

  PS : These are the assumptions we made on this issue, May be we are wrong , so please guide us to the right path so we can achieve our goal.