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• Ffmpeg gdigrab records black window when capturing graphics-intensive flight simulator

  23 mars 2021, par iter

  I am trying to capture video from XPlane, a popular flight simulator. I'm running on Windows.

  



  Normally, I can capture individual windows using gdigrab, but when I use it on an XPlane window like so...

  



  ffmpeg -f gdigrab -framerate 30 -i "X-System" -b:v 300K capture.mp4


  



  ...I get a video file that's the right dimensions but is all black. I imagine this may have something to do with how XPlane talks directly to the GPU. I should add that if I capture the entire desktop like so...

  



  ffmpeg -f gdigrab -framerate 30 -i desktop -b:v 300K capture.mp4


  



  ...I get everything including the simulator window, but naturally with unrelated windows in the capture, including windows sitting on top of the simulator window.

  



  Is there a way for gdigrab to capture video this GPU-intensive window alone ? Is there a different tool I can use ?

  


• linphone-3.5.2 install on centOS error

  26 novembre 2012, par plancys

  I have a problem with installation of Linhone.
  I follow this page
  When I install mediastreamer2 I got this error.

  [root@IPv6B mediastreamer2]# make
  
  make  all-recursive
  
  (...)
  
  videoenc.c: In function ‘ms_ffmpeg_check_init’:
  
  videoenc.c:56: warning: implicit declaration of function ‘avcodec_init’
  
  videoenc.c: In function ‘prepare’:
  
  videoenc.c:239: warning: ‘avcodec_get_context_defaults’ is deprecated (declared at /usr/local/include/libavcodec/avcodec.h:3437)
  
  videoenc.c: In function ‘prepare_h263’:
  
  videoenc.c:303: error: ‘CODEC_FLAG_H263P_UMV’ undeclared (first use in this function)
  
  videoenc.c:303: error: (Each undeclared identifier is reported only once
  
  videoenc.c:303: error: for each function it appears in.)
  
  videoenc.c:305: error: ‘CODEC_FLAG_H263P_SLICE_STRUCT’ undeclared (first use in this function)
  
  videoenc.c: In function ‘enc_preprocess’:
  
  videoenc.c:345: warning: ‘avcodec_open’ is deprecated (declared at /usr/local/include/libavcodec/avcodec.h:3569)
  
  videoenc.c: In function ‘add_rfc2190_header’:
  
  videoenc.c:375: error: ‘FF_I_TYPE’ undeclared (first use in this function)
  
  videoenc.c: In function ‘process_frame’:
  
  videoenc.c:782: error: ‘FF_I_TYPE’ undeclared (first use in this function)
  
  videoenc.c:794: warning: ‘avcodec_encode_video’ is deprecated (declared at /usr/local/include/libavcodec/avcodec.h:4272)
  
  make[3]: *** [videoenc.lo] Error 1
  
  make[3]: Leaving directory `/home/TEST/Desktop/APPS/linphone-3.5.2/mediastreamer2/src'
  
  make[2]: *** [all] Error 2
  
  make[2]: Leaving directory `/home/TEST/Desktop/APPS/linphone-3.5.2/mediastreamer2/src'
  
  make[1]: *** [all-recursive] Error 1
  
  make[1]: Leaving directory `/home/TEST/Desktop/APPS/linphone-3.5.2/mediastreamer2'
  
  make: *** [all] Error 2

• 403 Forbidden error occurs on macOS, ffmpeg

  7 juillet 2023, par LinuxPenguin99

  I got a problem with using ffmpeg on mac.

  


  I tried 3 ways.

  


  


  1. Download with MacBook Pro M1 Max Ventura 13.4.1 which installed ffmepg with Homebrew.

     


  


  2. Download with MacBook Pro Intel Ventura 13.4.1 which installed ffmepg with Homebrew.

     


  


  3. Download with Windows 10 Pro Desktop which use ffmpeg that sourced by 7z zip file.

     


  


  


  I use the same command. But only windows desktop could download successfully.

  


  Mac command : ffmpeg -i "link" -c copy filename.mp4

  


  Windows command : ffmpeg.exe -i "link" -c copy filename.mp4

  


  Mac environments occurs HTTP error 403 Forbidden, (access denied) error.

  


  How can I solve this problem ?