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• FFmpeg returning error when obs studio tries to enable NVENC

  20 octobre 2022, par Qwerty_PLM

  Apparently the error in obs is "Failed to open NVENC codec : generic error in an external library". I'm using ffmpeg nvenc encoder. the log shows the following lines.

  


  [h264_nvenc @ 0x56341a8cdf40] The selected preset is deprecated. Use p1 to p7 + -tune or fast/medium/slow.
[h264_nvenc @ 0x56341a8cdf40] OpenEncodeSessionEx failed: out of memory (10): (no details)
[h264_nvenc @ 0x56341a8cdf40] No capable devices found


  


  When I run nvidia-smi, the result is below

  


  -----------------------------------------------------------------------------+
| NVIDIA-SMI 520.56.06    Driver Version: 520.56.06    CUDA Version: 11.8     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA GeForce ...  Off  | 00000000:01:00.0 Off |                  N/A |
| N/A   54C    P5    21W /  N/A |     58MiB /  8192MiB |     26%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A      5595      G   /usr/lib/Xorg                      12MiB |
|    0   N/A  N/A     15882      G   obs                                44MiB |
+-----------------------------------------------------------------------------+



  


  My environment :

  


  

  • Arch linux with kernel 6.0.2

  


  • RTX 3070 laptop
I hope to find an solution to allow me to use nvenc encoding for recording videos.

  


  


  Software encoding does work, but I'm using a laptop cpu which provides poor performance.

  


  UPD : applying the patch from https://github.com/keylase/nvidia-patch worked but I want to know why it didn't work before because I've never run any process that uses nvenc, and the patch only enables multiple nvenc sessions.

  


• Problems linking to FFMPEG library in Visual Studio 2010

  11 décembre 2013, par Dídac Pérez

  I have cross-compiled FFMPEG from Debian using the mingw32 toolchain. The result of the compilation is a set of .a files. When I try to use them in my project I get linker errors, concretely the following ones :

  1>RTSPCapture.obj : error LNK2019: unresolved external symbol _avformat_free_context referenced in function ...
  
  1>RTSPCapture.obj : error LNK2019: unresolved external symbol _avio_close referenced in function ...
  
  1>RTSPCapture.obj : error LNK2019: unresolved external symbol _avcodec_close referenced in function ...
  
  (and much more...)

  I have already included the header files like this :

  extern "C"
  
  {
  
      #include <libavcodec></libavcodec>avcodec.h>
  
      #include <libavformat></libavformat>avformat.h>
  
      #include <libavformat></libavformat>avio.h>
  
  }

  And I use the .a files like this :

  #pragma comment(lib, "libavcodec.a")
  
  #pragma comment(lib, "libavformat.a")
  
  #pragma comment(lib, "libavutil.a")

  May I know why I am still getting linker errors ? Best regards,

  EDIT : I have realized that this is not possible. So, what should I do to use FFMPEG library in my MSVC2010 project taking into account that I can't compile ffmpeg in Windows ? it seems to be REALLY difficult...

• Android : How to configure FFMPEG latest version in android studio ?

  28 décembre 2016, par Ravi Vaghela

  I want to configure FFMPEG in android studio but i cant get any document or link for that. Github on many FFMPEG lib available for android but that all are with old version. And how to run command in android ? and i want to know after configure FFMPEG then how can we run FFMPEG commands. Help me for that. thanks advance.

  I have used below links but not success in for latest version.

  http://writingminds.github.io/ffmpeg-android-java

  https://github.com/WritingMinds/ffmpeg-android-java

  https://github.com/havlenapetr/FFMpeg

  https://github.com/appunite/AndroidFFmpeg

  https://github.com/WritingMinds/ffmpeg-android