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• Error using ffmpeg in video downloader : 'ERR : spawn ./db/ffmpeg ENOENT'

  25 septembre 2021, par GingerCoffee

  I've been trying to get Floatplane Downloader to work on my NAS and I've managed to get most of the way. I've set up an Ubuntu Server VM in TrueNAS and got it working in a Docker container. Everything is downloading fine to the right folder on the NAS but once the download finishes I get this error : ERR: spawn ./db/ffmpeg ENOENT

  


  It then tries a couple more times but nothing. I made sure I had ffmpeg installe though I don't know if the reason it can't use it is because it's installed on the host and not in the Docker container directly ? Though I've not been able to work out how to do that or even if it's possible.

  


  I tried just copying ffmpeg from /usr/bin to /var/lib/docker/volumes/db/_data where it seems like it wants it to be and then I get this instead : ERR: Command failed: ./db/ffmpeg -i ./videos/Media/LTT/TechLinked/TechLinked - S2021E0925021600 - STEAM Games on Xbox.partial and then lists all the metadata for the video so I'm not sure that was right.

  


  Whenever I start the downloader, the first thing it says is Ffmpeg binary missing! Downloading...' and then Done a few seconds later. So it seems to be detecting that it doesn't have ffmpeg and then downloads it but that doesn't seem to work.

  


  Any ideas ?

  


• ffmpeg video stream to app c# [on hold]

  3 septembre 2014, par Alexey Medvedev

  I am trying to make a video mixer for online broadcasts. To do this, I use ffmpeg and C #. I had a problem with the transfer of the video stream from ffmpeg to my program. I would like to receive a stream of ffmpeg using network protocols (e.g. TCP, UDP or others) or capturing if from ffplay window, but I don`t how I can do it. Can you give me some ideas ?

  For example, I have command for ffmpeg : "ffmpeg -i video1.mp4 -f mpegts udp:127.0.0.1:5000" or same command with other output formats or network protocols. How i can read video stream from the port and convert it to Bitmap ?
  I need to send video stream from my program from computer A to my program to computer B. I write program on C#. I dont know how I can compress video which I must send between my computers and I decided to use Ffmpeg. Now, I can streaming video from my program in computer A to ffmpeg and compress it with parameters which I need.
  On second computer I can read this steam using ffmpeg or ffplay, but I don`t know how I can get this stream into my program.
  1) How can I get this stream in my program ? Which libraries can you recommend me ?
  2) Do you know any libraries which can compress video, instead of using ffmpeg ?

• Unable to compile ffmpeg to support NVIDIA hardware acceleration

  17 mars 2017, par user3847630

  I am trying to compile ffmpeg to support NVIDIA hardware acceleration. But I am getting the following errors :

  libavcodec/cuvid.c: In function ‘check_cu’:
  
  libavcodec/cuvid.c:83:5: error: implicit declaration of function ‘cuGetErrorName’ [-Werror=implicit-function-declaration]
  
       cuGetErrorName(err, &err_name);
  
       ^
  
  libavcodec/cuvid.c:84:5: error: implicit declaration of function ‘cuGetErrorString’ [-Werror=implicit-function-declaration]
  
       cuGetErrorString(err, &err_string);

  I have installed CUDA by following the instruction on NVIDIA Developer forum. The configuration I used is :

  ./configure --enable-nonfree --enable-nvenc --enable-cuda --enable-cuvid --enable-libx264 --enable-gpl

  The GPU on my laptop is NVIDIA Corporation GM108M [GeForce 840M].