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• Consume FFmpeg XCFramework from Objective-C, headers not found

  19 novembre 2020, par jamone

  I built FFmpeg for Apple's platforms as an XCFramework. I used the script in https://github.com/kewlbear/FFmpeg-iOS-build-script/pull/147 to do so.

  



  I'm trying to now consume that framework inside a traditional iOS/macOS framework (named VideoEditing), that then is used inside my iOS app (soon to try and be Catalyst).

  



  In VideoEditing I have linked to FFmpeg.xcframework and then in the app that uses VideoEditing I have linked & embedded FFmpeg.xcframework. Previously I was building FFmpeg as a standard static library, and using that from inside VideoEditing in a Objective-C++ wrapper so I can use it all from Swift.

  



  In that Objective-C++ file I would import FFmpeg headers like #import <libswscale></libswscale>swscale.h> To make that work, I had to set header search paths. How are you supposed to do it once you convert to the XCFramework ? I've tried @import FFmpeg, #import <ffmpeg></ffmpeg>libswscale/swscale.h>, #import <ffmpeg></ffmpeg>swscale.h> as well as #import <libswscale></libswscale>swscale.h>. In every case I just get a file not found error on the import line.

  



  All of Apple's examples are showing it just in Swift with the framework vending a module. If I was to try and still set a header search path, you now have different headers per architecture.

  



  

  


• Java process use more memory than VisualVM shows

  16 juillet 2021, par Dinexpod

  my java application works 1 day,
(I use different libs for processing photo like ffmpeg, javacv, javacpp)
and then I see that my app use 9,5Gb RAM.

  


  system monitoring tools

  


  I don't understand why my app use so a lot of memory.

  


  I set -Xmx6G

  


  In VisualVM I see that heap space size 188M

  


  heap space in visualVM

  


  Meta Space use 141M

  


  metaspace in visualVM

  


  May be this helps

  


  allocated bytes in visualVM

  


  I read articles that Java use more RAM than heap space because there are JIT, Heap space, meta space, code, ant etc. But 9.5Gb is a lot of on my mind

  


  Edited :

  


  

  • Yes my app some times have exceptions java.lang.OutOfMemoryError : Java heap space

  


  


• What is the difference between yuv420p and yuv420p(tv) ?

  9 novembre 2018, par Aleksandr Shemetillo

  I am trying to implement Fairplay ready browser player (Apple’s DRM).
  A stream that has h264(Main) yuv420p(tv) settings becomes non-working after drm decryption (crashed picture of green color). Converting again the video with a "Main" ffmpeg profile changes the setting to a simple yuv420 and this solves the problem.
  Please explain the difference.
  Or maybe some other changes I don’t see can happen during the conversion ?

  Of course, since we are talking about Fairplay, the problem is observed in Safari on Os X