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• Windows 10 EV code signing no longer works on electron app

  23 février 2021, par SoOhNo

  I have an electron app. Pretty basic app. It doesn't use ffmpeg for anything it does play an mp3 chime from time to time. I build my app with electron-forge using squirrel format. I then sign it using the SafeNet Authentication app. It's always worked flawlessly.

  


  It's been a couple months since I last released a version. Only thing that has changed is some html ui updates within my electron app and of course lots of Windows 10 updates.

  


  My app builds fine using electron-forge, it installs and runs without issue. I then sign it like usual from the command line and SafeNet confirms it was signed. Right clicking on the file shows it has been signed by my organization. However, once I execute the signed app I get this error : "The code execution cannot proceed because ffmpeg.dll was not found. Reinstalling the program may fix this problem."

  


  Here is what I have tried so far :

  


  

  • Building/Signing on a different windows 10 machine.

  


  • Uninstall/Reinstall SafeNet.

  


  • Running signed .exe on a different Windows 10 instance

  


  • Building/Signing with a cmd session ran as administrator

  


  


  I am at a loss, why is it screaming about ffmpeg.dll which my app doesn't depend on ? Why only after the .exe has been signed do I get this error ?

  


  OS : Windows 10
  
Electron v7.3.2
  
Electron-Forge/cli v6.0.0-beta.47
  
SafeNet x64 v10.3

  


• Raw extraction of frames from a movie

  29 septembre 2016, par vkubicki

  I would like to extract images from a grayscale mj2 movie. Each pixel is encoded using 16 bits. Since this is a technical movie, I need to extract the value at each pixel without processing, as those values linearly map to a physical quantity (a heatmap from an infrared camera). I am using Scala, and I do not find any suitable solution for a direct extraction (either in Scala or in Java, but I am a beginner). Therefore I intend to use ffmpeg to extract individual frames on the disk, then load them as BufferedImage in Scala and process them.

  Is this a good approach ? Which format should I use to avoid any transformation in the data ? I want each extracted frame to ba as "raw" as possible ? Is it possible to directly output a csv containing the aforementionned values ?

• How to check if a .mp4 file is not corrupt and not missing movie frames or audio segments programmatically

  2 novembre 2019, par forgodsakehold

  With youtube-dl I was able to download quite a couple of .mp4 files. However, I have just discovered, after manually playing some of them, that they are missing movie frames in some parts while still playing audio (so a blank screen is shown), or missing audio while still playing movie frames.

  Hence,
  (1) Why doesn’t youtube-dl detect or warn against such a scenario ? It looks like the movie segments and audio track were merged and .mp4 produced without any warning. Is there a way to configure youtube-dl to detect such cases and redownload the movie ?
  (2) Otherwise, are there other ways to detect such cases programmatically ? (considering that one might have thousands of such .mp4 files and may not be able to manually go thru all of them ?) A solution with FFmpeg or php will be appreciated.