Recherche avancée

Sur d’autres sites (12269)

• Game Music Appreciation, One Year Later

  1er août 2013, par Multimedia Mike — General

  I released my game music website last year about this time. It was a good start and had potential to grow in a lot of directions. But I’m a bit disappointed that I haven’t evolved it as quickly as I would like to. I have made a few improvements, like adjusting the play lengths of many metadata-less songs and revising the original atrocious design of the website using something called Twitter Bootstrap (and, wow, once you know what Bootstrap is, you start noticing it everywhere on the modern web). However, here are a few of the challenges that have slowed me down over the year :

  Problems With Native Client – Build System
  The technology which enables this project — Google’s Native Client (NaCl) — can be troublesome. One of my key frustrations with the environment is that every single revision of the NaCl SDK seems to adopt a completely new build system layout. If you want to port your NaCl project forward to newer revisions, you have to spend time wrapping your head around whatever the favored build system is. When I first investigated NaCl, I think it was using vanilla GNU Make. Then it switched to SCons. Then I forgot about NaCl for about a year and when I came back, the SDK had reverted back to GNU Make. While that has been consistent, the layout of the SDK sometimes changes and a different example Makefile shows the way.

  The very latest version of the API has required me to really overhaul the Makefile and to truly understand the zen of Makefile programming. I’m even starting to grasp the relationship it has to functional programming.

  Problems With Native Client – API Versions and Chrome Bugs
  I built the original Salty Game Music Player when NaCl API version 16 was current. By the time I published the v16 version, v19 was available. I made the effort to port forward (a few APIs had superfically changed, nothing too dramatic). However, when I would experiment with this new player, I would see intermittent problems on my Windows 7 desktop. Because of this, I was hesitant to make a new player release.

  Around the end of May, I started getting bug reports from site users that their Chrome browsers weren’t allowing them to activate the Salty Game Music Player — the upshot was that they couldn’t play music unless they manually flipped a setting in their browser configuration. It turns out that Chrome 27 introduced a bug that caused this problem. Not only that, but my player was one of only 2 known NaCl apps that used the problematic feature (the other was developed by the Google engineer who entered the bug).

  After feeling negligent for a long while about not doing anything to fix the bug, I made a concerted and creative effort to work around the bug and pushed out a new version of the player (based on API v25). My effort didn’t work and I had to roll it back somewhat (but still using the new player binaries). The bug was something that I couldn’t work around. However, at about the same time that I was attempting to do this, Google was rolling out Chrome 28 which fixed the bug, rendering my worry and effort moot.

  Problems With Native Client – Still Not In The Clear
  I felt reasonably secure about releasing the updated player since I couldn’t make my aforementioned problem occur on my Windows 7 setup anymore. I actually have a written test plan for this player, believe it or not. However, I quickly started receiving new bug reports from Windows users. Mostly, these are Windows 8 users. The player basically doesn’t work at all for them now. One user reports the problem on Windows 7 (and another on Windows 2008 Server, I think). But I can’t see it.

  I have a theory about what might be going wrong, but of course I’ll need to test it, and determine how to fix it.

  Database Difficulties
  The player is only half of the site ; the other half is the organization of music files. Working on this project has repeatedly reminded me of my fundamental lack of skill concerning databases. I have a ‘production’ database– now I’m afraid to do anything with it for fear of messing it up. It’s an an SQLite3 database, so it’s easy to make backups and to create a copy in order to test and debug a new script. Still, I feel like I’m missing an entire career path worth of database best practices.

  There is also the matter of ongoing database maintenance. There are graphical frontends for SQLite3 which make casual updates easier and obviate the need for anything more sophisticated (like a custom web app). However, I have a slightly more complicated database entry task that I fear will require, well, a custom web app in order to smoothly process hundreds, if not thousands of new song files (which have quirks which prohibit the easy mass processing I have been able to get away with so far).

  Going Forward
  I remain hopeful that I’ll gradually overcome these difficulties. I still love this project and I have received nothing but positive feedback over the past year (modulo the assorted recommendations that I port the entire player to pure JavaScript).

  You would think I would learn a lesson about building anything on top of a Google platform in the future, especially Native Client. Despite all this, I have another NaCl project planned.

• Se passe de zpip-dist

  21 août 2013

  Il faudrait pouvoir se passe du plugin ^? zpip-dist.

  Il est dans les plugins obligatoires :

  
  zpip-dist ;svn ://zone.spip.org/spip-zone/_squelettes_/zpip-dist/trunk

  On devrait le surcharger complètement pour que mediaspip_core en soit indépendant et ne se basant que sur z-core.

  Bruno l’a déjà fait pour Géodiversité ici :

  • https://github.com/brunob/geodiversite/commit/b292b2582b3e42d80b13d8dd58247008303041b5
  • https://github.com/brunob/geodiversite/commit/bb4583ae27cd037a41688d485986d2760847f3f2
  • https://github.com/brunob/geodiversite/commit/60b2522c3db27df2497c0e08588766a062e37289

• FFmpeg will not run from php

  15 mars 2015, par user2392940

  This is a live server i am on a Windows 2008 Web Edition R2 server with IIS7.

  I have tried all of this locally and it works perfectly. At first i thought this may have been a permisson issue i gave all ffmpeg folders and output folders full control. I also checked the php ini file to make sure exec is enabled.

  I was intially running the exec() function i later changed it to the system() function to see what ffmpeg was outputting. With the system() function it returns the error "Acess is denied". All of my research points to a IIS setting or Application Pool not having the correct permission. Any help would be much appreciated.

  FFmpeg location : C :\ffmpeg\bin\ffmpeg.exe

  I have been working on this for nearly a week even my server provider has no answer on why ffmpeg will not run from php. I believe this is a little deeper than full paths. It’s obviously a permission problem but the question is where is the permission problem ?

  It also seems that no .exe file can be executed from php.

  system ("$ffmpeg -i yourvideo/.mp4 -threads 1 -ss 20 -b 10k  -s 240x180 -vf fps=fps=1/20 -vframes 12 -aspect 4:3 thumbs/yourvideo/yourvideo.%01d.jpg 2>&1");