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• FFMPEG : Converting WAV to MP4 with filter loops forever

  30 juin 2021, par David Ferris

  I'm using the following basic ffmpeg commend to convert a WAV file to an MP4.

  


  ffmpeg -i response.wav -s 1980x1080 -c:a aac -b:a 128k aNewVideo.mp4

  


  This is great, however I'd like to include a black background on the mp4 file, and as it stands this doesn't add ANY background (see below).

  


  

  


  I have tried to include the following filter to add this background, which works, however it loops forever, and when I stop it manually I get a file which is hours long with the first 20 seconds or so being my original audio.

  


  ffmpeg -f lavfi -i color=c=black:s=1280x720:r=5 -i response.wav -s 1980x1080 -c:a aac -b:a 128k aNewVideo.mp4

  


  How can I add this black background without running into this infinite loop problem ?

  


• Studying A Game Wave Disc

  23 novembre 2010, par Multimedia Mike — Game Hacking

  I picked up a used copy of game called Gemz — a rather flagrant Bejeweled clone — for a game console called Game Wave Family Entertainment System. Heard of it ? Neither had I. But the game media is optical, so I had to get it and study it.

  
  
  

  When mounted in Linux (as UDF), the disc is reported to contain 2.8 GB of data, so it has to be a DVD. 810 MB of that is dedicated to the movies/ directory. Multimedia format ? Just plain, boring MPEG files (very YouTube-friendly— here’s the opening animation). Deeper digging reveals some more subdirectories called movies/ that, combined, occupy the lion’s share of the disc space. Additionally, there are several single-frame .m2v files in a directory called iframes/ which are used to encode things like load screens.

  
  
  

  There are more interesting data files including .zbm files for images and fonts, and .zwf files for audio. I suspect that these stand for zipped bitmap and zipped wave file, respectively. They can’t be directly unzipped with ’gunzip’. Some of the numbers at the start of some files lead me to believe they can be easily decompressed with standard zlib facilities.

  Based on the binary files on the Gemz disc, I couldn’t find any data on what CPU this system might use. A little Googling led me to this page at the Video Game Console Library which pegs the brain as a Mediamatics 6811. Some searching for that leads me to a long-discontinued line of hardware from National Semiconductor.

  The Console Library page also mentions that the games were developed using the Lua programming language. Indeed, there are many Lua-related strings in the game’s binaries (’zlib’ also makes an appearance).

• Révision 23588 : corriger l’utilisation du critere {annee_relatif} et autres relatif, utilise sans...

  9 juin 2017, par cedric@yterium.com

  YEAR-YEAR = ’’
  au lieu de
  YEAR-YEAR = 0
  Le premier marchant en mysql mais pas en sqlite

  (Par contre un annee_relatif=0 marchait bien dans tous les cas)