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• vaapi_encode : Check config attributes before creating config

  18 mai 2016, par Mark Thompson

  vaapi_encode : Check config attributes before creating config
  This prevents attempts to use unsupported modes, such as low-power
  
  H.264 mode on non-Skylake targets.  Also fixes a crash on invalid
  
  configuration, when trying to destroy an invalid VA config/context.
  

  • [DBH] libavcodec/vaapi_encode.c

• Forwarding RTSP streams to client from private networked server via proxy

  21 juin 2016, par beNerd

  I have a setup where I have two physical machines (remote VPSes) :

  1. Server One - This has good processing power in terms of hardware and it’s IP can’t be accessed publicly. It’s private networked to a proxy (server 2) i.e it can only be accessed by the proxy server. Running nodejs/expressjs and ffmpeg/ffserver on ubuntu.

  2. Server Two : Reverse Proxy. Publicly accessible. Implements nginx which pipes the requests to Server One.

  Now, I have client apps that needs to play RTSP streams configured in the FFSERVER residing on Server One. Since I cannot access server one directly and only via proxy, I need a mechanism where I can accept RTSP requests on my nodejs api (which receives requests from nginx proxy via proxy pass config block), do some validations (session tokens here) and then when validated, contact the underlying ffserver asking for the stream. As soon as I receive the stream, I should be able to forward to the asking client.

  Possible ? How ?

• Animation with gnuplot : only one cruve plotted in an animation whereas 2 expected

  26 mai 2022, par stefan

  I have the following script which is expected to produce the animations of 2 curves :

  


  #!/bin/bash

for i in {1..397}; do
gnuplot -p <<-EOFMarker
set terminal png;
set output "pic$i.png";
set title "power spectrum";
set xlabel "scale (k)";
set ylabel "P(k)";
set key top left;
set grid;
set ytics out nomirror;
set xtics out nomirror;
set logscale x;
set logscale y;
set format x "10^{%L}";
set yrange [0:30000];
plot "CAMB-1.3.5/matter_camb$i" u 1:2 w l;
replot "EFTCAMB_v3_beta/matter_eftcamb$i" u 1:2 w l;
EOFMarker
done

# Build movie with ffmpeg
ffmpeg -start_number 1 -i pic%d.png  movie.mpeg


  


  Every works fine excepted the fact that only one curve is plotted in animation (CAMB-1.3.5) :

  


  Here is an example of frame :

  


  

  


  Why the "replot" command is not taken into account in the generated image ?