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• Extract undecoded audio payload from song file ?

  6 juin 2012, par DataSurfer

  What tools are available to extract the raw undecoded audio payload from a song file ?

  I am looking for a solution that will work on wma, m4a, mp3, and ogg files.

  One of the purposes is to be able to calculate the md5sum of the audio payload.

  I tried ffmpeg -i <song file="file"> -f md5 -</song> but this actually does a decoding pass which is not desired. Also this seems to produce different results depending on the versions of the decoders in use.

  I tried ffmpeg -i <song file="file"> -acodec copy - > <raw payload="payload" file="file"></raw></song> but ffmpeg complains that it does not know the desired output format even though copy is explicitly specified.

  I've tried various incarnations of -map_metadata -1 but the documentation is obtuse at best.

  In the end the ideal is to have an stdout of the raw UNdecoded audio portion of a song file.

  Any ideas ?

• Building FFmpeg for android to run command line args

  11 septembre 2012, par Zargoon

  I am trying to build the FFmpeg library to use in my android app with the NDK. The reason for this is because I am using the native video capture feature in android because I really don't want to write my own video recorder. However, the native video capture only allows for either high-quality encoding, or low quality encoding. I want something in between, and I believe that the solution is to use the FFmpeg library to re-encode the high quality video to be lighter.

  So far I have been able to build the FFmpeg library according to this guide : http://www.roman10.net/how-to-build-ffmpeg-for-android/ and which a few tweaks I have been able to get it to work.

  However, everything that I've found seems to be about writing your own encoder, which seems like overkill to me. All that I really want to do is send a string in command line format to the main() function of FFmpeg and re-encode my video. However, I can't seem to figure out how I build FFmpeg to give me access to the main method. I found this post : Compile ffmpeg.c and call its main() via JNI which links to a project doing what I want more of less, but for the life of me I cannot figure out what is going on. It also seems like he is compiling more than I want, and I would really like to keep my application as light weight as possible.

  Some additional direction would be extremely helpful. Thank you.

• Rendre compatible avec SPIP 3.0

  11 juin 2012

  Rendre compatible MediaSPIP avec SPIP 3.0 ce qui consistera en la version 1.0 de MediaSPIP.

  Les extensions qui sont compatibles :

  • afficher_objets => intégré plus ou moins dans le core ;
  • ajaxforms, n’était utilisé que pour les logos => intégré plus ou moins dans le core ;
  • contact ;
  • crayons ;
  • doc2img ;
  • facteur ;
  • forum => intégré dans le core ;
  • job_queue => intégré dans le core ;
  • jquery_ui => Intégré dans le core ;
  • menus ;
  • nospam ;
  • palette ;
  • saisies ;
  • zpip ;
  • Podcast ;

  Les extensions à rendre compatibles :

  • auteurs_syndic ;
  • diogene ;
  • diogene_gerer_auteurs ;
  • emballe_medias ;
  • emballe_medias_doc2img ;
  • emballe_medias_spipmotion ;
  • fonctions_images ;
  • getid3 ;
  • html5 ;
  • mediaspip_config ;
  • mediaspip_core ;
  • mediaspip_init ;
  • spipmotion ;
  • swfupload ;

  Les extensions auxquelles on devra trouver une solution afin de s’en passer :

  • cfg2_compat ;
  • cfg2_core ;
  • cfg2_interface ;
  • pcltar => La librairie est utilisée dans SVP, regarder s’il y a des choses à faire ;
  • spip-bonux-2 => les boucles POUR et CONDITION sont dans le core, à voir si on a besoin d’autres choses ;
  • step à remplacer par SVP, voir si on a besoin de travailler la chose ;