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• how to use ffmpeg in eclipse c++(win7 64)？ [duplicate]

  22 août 2016, par Coco

  This question already has an answer here :

  • What is an undefined reference/unresolved external symbol error and how do I fix it ?
    
    25 answers
    

  How to use ffmpeg, such as config include,lib,dll. It’s always build error.
  Who can tell me, thanks...

  #define __STDC_CONSTANT_MACROS
  
  
  
  #include <iostream>
  
  using namespace std;
  
  
  
  extern "C" {
  
  #include "libavformat/avformat.h"
  
  }
  
  
  
  int main() {
  
      av_register_all();
  
      cout &lt;&lt; "!!!Hello World!!!" &lt;&lt; endl; // prints !!!Hello World!!!
  
      return 0;
  
  }
  
  </iostream>

  error : /../src/ffmpeg_test.cpp:18 : undefined reference to `av_register_all’

•  : and - characters not showing when applying drawtext

  6 mars 2019, par SPYBUG96

  I am trying to get the characters ’-’ and ’ :’ to show up when I draw text on an image so I can have the date and time show up properly formatted. When I run the python code and all that to set up the text it is exactly how I want it, I printed it to the screen. When the command is run though, the date and time don’t show, at least when I try drawing this : 2018-12-12 T03:20:40 What shows up on the image is 12 T

  This is an example of the ’ :’ and ’-’ characters having a problem

  ffmpeg -y -i TifImageLoc -vf vflip,drawtext=fontfile=C:WINDOWS\Fonts\sserife.fon:fontsize=200:fontcolor=white:x=(w-text_w)/2:y=(h-texth-texth)/2:text="Hello\-\ \:World" -frranes:v 1 output1.tif

  When this is run I want the result of Hello- :World to be drawn on the image, but the actual result is Hello perfectly centered on the picture

  How do you draw the ’-’ and ’ :’ to an image using FFmpeg so that a date in this 2018-12-12 T03:20:40 format can be on the image ?

• How to get video stream information with RtspClientSharp library ?

  13 septembre 2022, par theateist

  I use RtspClientSharp to receive video frames from rtsp stream. The library allows just to receive the frames. But, I need to get information about the stream, such as bitrate, codec and etc. I don't see that there is currently an option for this in the library.

  


  

  1. Do I miss something or I need to modify the RtspClientSharp code to support this ?

  


  2. Other alternative is to write a helper code in c++ which uses ffmpeg. I can use pinvoke to call c++ code which will connect to the rtsp stream (in addition to RtspClientSharp client), get the stream information and send it back to my c# code. Is this a better alternative ?