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• FFmpeg compiling error(libavfilter/vf_scale_cuda.cu)

  11 août 2021, par Amir Mousavi

  installed packages :

  


  


  libx264 - cuda11.2 - cuda-toolkit - nvidia-driver-465

  


  


  command :

  


  ./configure —enable-nonfree —enable-cuvid —enable-nvenc —enable-cuda-nvcc —enable-libx264 —enable-gpl —extra-cflags=-I/usr/local/cuda/include —extra-ldflags=-L/usr/local/cuda/lib64

  


  here is latest lines errors :

  


  


  libavfilter/vf_scale_cuda.cu(1123) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1123) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1124) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1124) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1124) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1124) : error : a template argument may not reference a non-external entity

  


  Error limit reached.
100 errors detected in the compilation of >"/tmp/tmpxft_000032a1_00000000-7_vf_scale_cuda.cpp1.ii".
Compilation terminated.
ffbuild/common.mak:108 : recipe for target >'libavfilter/vf_scale_cuda.ptx' failed
make : *** [libavfilter/vf_scale_cuda.ptx] Error 4
make : *** Waiting for unfinished jobs....

  


  


  I don't know where is the problem.

  


  lines that error referenced :

  


  EAREST_KERNELS(yuv420p)
NEAREST_KERNELS(nv12)
NEAREST_KERNELS(yuv444p)
NEAREST_KERNELS(p010le)
NEAREST_KERNELS(p016le)
NEAREST_KERNELS(yuv444p16le)


  


• Send tcp audio stream to a virtual audio device ?

  2 juillet 2021, par iegrm

  I'm making project to use my Android phone's mic as a recording device on my PC

  


  I can get the audio data of the phone's mic via a tcp localhost connection which routes through usb.

  


  With the following command to VLC, I can playback this audio through the default playback device :

  


  vlc -Idummy --demux rawaud --network-caching=50 tcp://localhost:28200


  


  But how to instead send this audio to a virtual audio device so that I can emulate it as a mic device ?

  


  I have experimented with this project in the past for creating a loopback driver for recording desktop audio using ffmpeg like so :

  


  ffmpeg -f dshow -i audio="CustomLoopbackDevice" out.mp3


  


  ..which I assume would be somewhat similar for creating a virtual audio device. I'll be checking this opensource project for making a virtual audio device but not concerned about it just yet, for now I'm using a trial version of virtual audio cable for testing.

  


  My only real issue at the moment is I'm not sure how to send the recorded audio from the tcp input stream to a virtual audio device.

  


  I'm assuming I could use either ffmpeg/vlc to send that tcp stream to the virtual audio device ? But I'm not sure what the command args for it would be.

  


  I'm using C# to manage the recording and I found this snippet of code for writing from a file to what I assume is a specific device by ID :

  


  WaveStream waveStream = new WaveFileReader("file.wav");
WaveOut waveOut = new WaveOut();
waveOut.DeviceNumber = 0;
WaveOut.Init(waveStream);
WaveOut.Play();


  


  But I'm not sure if this would support reading from the tcp stream instead of from file and how to retrieve device number of virtual device.

  


• Cannot find installation of real FFmpeg (which comes with ffprobe)

  29 mars 2023, par Asm Goni

  I was trying to fit a generator into a model and I got this error : 
AssertionError: Cannot find installation of real FFmpeg (which comes with ffprobe).

  



  I have looked over many of the solutions on GitHub and other questions on Stack Overflow but none of them worked for me.

  



  Here is one of the commands I ran :

  



  sudo add-apt-repository ppa:mc3man/trusty-media  
sudo apt-get update  
sudo apt-get install ffmpeg  
sudo apt-get install frei0r-plugins  


  



  pip list also indicates the presence of ffmpeg-1.4

  



  In addition, I tried force reinstalling and updating ffmpeg just in case any dependencies were not installed properly.

  



  I also set the skvideo's path for ffmpeg manually :

  



  skvideo.setFFmpegPath('/usr/local/lib/python3.6/dist-packages/ffmpeg/')


  



  This returns : /usr/local/lib/python3.6/dist-packages/skvideo/__init__.py:306: UserWarning: ffmpeg/ffprobe not found in path: /usr/local/lib/python3.6/dist-packages/ffmpeg/
  warnings.warn("ffmpeg/ffprobe not found in path: " + str(path), UserWarning)

  



  By the way, when I try installing, it also returns this error, I don't know what to do about this :

  



  Get:127 http://archive.ubuntu.com/ubuntu bionic/main amd64 vdpau-driver-all amd64 1.1.1-3ubuntu1 [4,674 B]
Fetched 60.4 MB in 7s (8,769 kB/s)
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/w/wavpack/libwavpack1_5.1.0-2ubuntu1.1_amd64.deb  404  Not Found [IP: 91.189.88.149 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?


  



  I ran apt-get update --fix-missing and that didn't make anything better.

  



  Is there a solution to this ?