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• Adobe Air , NativeProcess and ffmpeg

  18 août 2013, par Tom Lecoz

  First of all, please excuse me if my english is not perfect, I hope you could understand me...

  I discover yesterday this video tutorial about Air Native Process and FFMPEG, it shows how to create an Air app that can read every video format (avi, mkv, ...).

  http://www.youtube.com/watch?v=6N7eN9wvAGQ

  I tryed to reproduce it but obviously it didn't work...

  Then I looked for an example of it, with working source code, on the internet. I found this

  http://suzhiyam.wordpress.com/2011/05/05/as3ffmpeg-play-multi-video-formats-in-air/

  The author said it's a document class for a Flash project, it just need a button component, a text area and a video Object.

  I tryed it inside a Flash project, it didn't work...
  So, I made some adjusment to run it outside Flash (I just replaced the DisplayObject on the stage by ActionScript code), just because it easier if you want to test it.

  When I say "it didn't work", I mean my video is not read at all. The nativeProcess is working, my executable is recognize but I always get some ProgressEvent.STANDARD_ERROR_DATA and then the process stop...

  I'm working on Windows 7 64 bit.
  I tryed with FFMPEG 32 & 64 bit and get the exact same (no) result.

  You can find my code here
  pastebin.com/U3xRUKWe

  Can someone help me ?

  Please ! :)

  Thanks by advance !

  Tom

• Adding AY Files To The Game Music Website

  1er décembre 2013, par Multimedia Mike — General

  For the first time since I launched the site in the summer of last year, I finally added support for new systems for my Game Music Appreciation site : A set of chiptune music files which bear the file extension AY. These files come from games that were on the ZX Spectrum and Amstrad CPC computer systems.

  
   
  

  Right now, there are over 650 ZX Spectrum games in the site while there are all of 20 Amstrad CPC games. The latter system seems a bit short-changed, but I read that a lot of Amstrad games were straight ports from the Spectrum anyway since the systems possessed assorted similarities. This might help explain the discrepancy.

  Technically
  The AY corpus has always been low hanging fruit due to the fact that the site already supports the format courtesy of the game-music-emu backend. The thing that blocked me was that I didn’t know much about these systems. I knew that there were 2 systems (and possibly more) that shared the same chiptune format. Apparently, these machines were big in Europe (I was only vaguely aware of them before I started this project).

  Both the Spectrum and the Amstrad used Zilog Z-80 CPUs for computing and created music using a General Instruments synthesizer chip designated AY-3-8912, hence the chiptune file extension AY. This has 3 channels similar to the C64 SID chip. Additionally, there’s a fourth channel that game music emu calls “beeper” (and which Wikipedia describes as “one channel with 10 octaves”). Per my listening, it seems similar to the old PC speaker/honker. The metadata for a lot of the songs will specify either (AY) or (Beeper).

  Wrangling Metadata
  Large collections of AY files are easy to find ; as is typical for pure chiptunes, the files are incredibly small.

  As usual, the hardest part of the whole process was munging metadata. There seems to be 2 slightly different conventions for AY metadata, likely from 2 different people doing the bulk of the work and releasing the fruits of their labor into the wild. After I recognized the subtle differences between the 2 formats, it was straightforward to craft a tool to perform most of the work, leaving only a minimum of cleanup effort required afterwards.

  (As an aside, I think this process is called extract – transform – load, or ETL. Sounds fancy and complicated, yet it’s technically one of the first computer programming tasks I was ever paid to perform.)

  Collateral Damage
  While pushing this feature, I managed to break the site’s search engine. The search solution I developed was always sketchy (involving compiling a C program as a static binary CGI script and trusting it to run on the server). I will probably need to find a better approach, preferably sooner than later.

• Anomalie #3100 (Nouveau) : Bug - Base PostgreSQL

  20 novembre 2013, par _ CasP

  Bonjour,
  Je viens de créer un site mutualisé sur mon site. Mon ancien site à une base MYSQL et n’a pas de souci.
  En revanche le nouveau site à lui une base PostgreSQL.

  L’hébergement est chez OVH.

  je constate 2 chose étrange la première : lors de l’instalation du site après avoir renseigné le serveur et l’utilisateur, je me retrouve à avoir le choix parmi une multitude de base de donnée. Là ou habituellement je n’ai que le nom de celle que j’ai crée.
  Mais peux être ceci est un souci lié à OVH, je leur ai écrit pour demander.

  Le deuxième Bug a lieu lors de la création de RUBRIQUES dans l’espace privée.
  Cela fonctionne, cependant après la création je me retrouve avec une

  3 Erreur(s) dans le squeletteNuméro Message squelette boucle Ligne
  1 Array / /
  2 Array / /
  3 Array / /

  Warning : pg_query() [function.pg-query] : Query failed : ERREUR : la référence à la colonne « id_rubrique » est ambigu LINE 4 : GROUP BY id_rubrique,lang ^ in /homez.64/casp/www/ecrire/req/pg.php on line 168

  Warning : pg_query() [function.pg-query] : Query failed : ERREUR : la référence à la colonne « lang » est ambigu LINE 4 : GROUP BY id_article,lang ^ in /homez.64/casp/www/ecrire/req/pg.php on line 168

  Warning : pg_query() [function.pg-query] : Query failed : ERREUR : la référence à la colonne « lang » est ambigu LINE 4 : GROUP BY id_breve,lang ^ in /homez.64/casp/www/ecrire/req/pg.php on line 168

  Et je reste sur la page de crétion sans être redirigé. J’ai alors l’option :
  Votre modification a été enregistrée
  Si votre navigateur n’est pas redirigé, cliquez ici pour continuer.
  Tout fonctionne ce n’est donc pas dramatique. Mais c’est un peu gènant.