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• Black screen when recording specific screen / window using ffmpeg [closed]

  16 mai, par Mark Brin

  Issue :
I'm trying to capture the specific window using ffmpeg & i've tried these below command for that :

  


  ffmpeg -f gdigrab -framerate 30 -i title="Window Title" -b:v 3M -pix_fmt yuv420p output_FILENAME.webm


  


  And also try changing output format to .mp4

  


  ffmpeg -f gdigrab -framerate 30 -i title="Window Title" -b:v 3M -pix_fmt yuv420p output_FILENAME.mp4


  


  but the output video just shows the black screen with cursor.

  


  What i've tried :

  


  


  • Tried online solutions like Recording Screen with FFmpeg, How to record a specific window using ffmpeg ?, Record specific window using ffmpeg, but none of them worked.

    


  


  • even tried some of the tweaks like removing flags like -pix_fmt yuv420p also tried -f d3d11grab but didn't work.

    


  


  • When i try desktop capture it works completely fine.

    


  


  • I'm using this command to confirm that i'm using correct window title

    


  


  


  Get-Process |
  Where-Object { $_.MainWindowTitle -ne "" } |
  Select-Object -Unique MainWindowTitle


  


  System I'm using :

  


  Windows 11

  


• avfilter : always call ff_default_query_formats

  20 octobre 2023, par Niklas Haas

  avfilter : always call ff_default_query_formats
  Even if a query func is set. This is safe to do, because
  
  ff_default_query_formats is documented not to touch any filter lists
  
  that were already set by the query func.
  The reason to do this is because it allows us to extend
  
  AVFilterFormatsConfig without having to touch every filter in existence.
  
  An alternative implementation of this commit would be to explicitly add
  
  a `ff_default_query_formats` call at the end of every query_formats
  
  function, but that would end up functionally equivalent to this change
  
  while touching a whole lot more code paths for no reason.
  As a bonus, eliminates some code/logic duplication from this function.
  

  • [DH] libavfilter/avfiltergraph.c

• Java Wrapper : FMJ FFmpeg Livestreaming/Recording

  1er octobre 2013, par DaCoder

  I have begun to do an application for Linux users to livestream with. Currently the only good way to livestream with Linux is FFmpeg and through terminal. I have gotten a good hold on FFmpeg, but trying to get FFmpeg to load with Java is difficult, and I have no clue where to start. I am using FMJ, a wrapper for Java (whatever that means). And I have FFmpeg working, but I need to know how to code in FFmpeg with the wrapper, and make a video output on the screen, as well as stream video to twitch.tv or .mp4 files.

  Currently the GUI is easy to do, but no functionality is within the Application to even stream/record, so I will need some help on how to set up wrappers, how to implement them, and/or alternative and easier methods for coding this.

  What I want out of my application (and need still) GUI->FFmpeg(records screeen)->FFmpeg(encodes/compresses the video and streams)->Output to small preview window in GUI->And outputted to Twitch/Local Recording. I have everything in place EXCEPT the FFmpeg bits.

  Any help would be appreciated, and I am hoping to code the interactions with FFmpeg and Java myself, not to use a prebuilt client for that.

  Furhtermore, I will setup a GitHub of this project soon. But as for right now, I want to focus on this issue at hand.

  Thank you.