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• FFMPEG av_read_frame() return an I/O error (-5) ?

  7 mars 2019, par vominhtien961476

  I’m using ffmpeg library to capture screen (desktop). Everything works fine when I run my app in debug/release mode. The I/O error comes when this app run in c# window service mode (win 10 OS). I googled but still don’t know why the error come. In the service mode there is no problem when connecting to some rtsp link (Camera) except desktop capture.

  AVInputFormat * pAVInputFormat = av_find_input_format("gdigrab"); 
  
  if (pAVInputFormat != NULL) 
  
  { 
  
     int err = avformat_open_input(&pFormatCtx, "desktop", pAVInputFormat, NULL); 
  
     if(err== 0) 
  
     { 
  
        err = av_read_frame(&pFormatCtx, &packet); 
  
        if (err < 0) 
  
        { 
  
            char errs[AV_ERROR_MAX_STRING_SIZE]; 
  
            av_make_error_string(errs, AV_ERROR_MAX_STRING_SIZE, err ); 
  
            String^ errStr = gcnew String(errs); 
  
            WriteLog("Error in function av_read_frame() return = " + errStr); 
  
            return -1; 
  
       } 
  
     } 
  
  }

  ---

• FFMPEG - Instructional video combining letters to a background to form a word

  6 juin 2020, par Knide

  I'm trying to help with coding a FREE site for instructional video for kids on how to write in australian. To help with the current pandemic that we are experiencing right now.

  



  Anyway, I'm new to ffmpeg and would like to do the letter combinations programatically using it.

  



  So basically I have a form where teachers or parents can enter a word, and I have video instructions for each letter, and would combine them to form the word.

  



  Example : Dog

  



  This is the background :
https://drive.google.com/file/d/1Ds1sRKQ98c5d31dI6qkqTrp1U9f89nv2/view?usp=sharing

  



  These are the letters :

  



  D - https://drive.google.com/file/d/1DHa1sZ7mklY1p3lquD8h5kTbXaZmtB_z/view?usp=sharing

  



  o - https://drive.google.com/file/d/1Ytwq_3l7x0vRDMEpZpmFjT9QNICYWH_D/view?usp=sharing

  



  g - https://drive.google.com/file/d/16jcOsrSbMSbsk2vsqeMXv9Cc4Uss7qtj/view?usp=sharing

  



  And the output would become :
https://drive.google.com/file/d/1RT38IOwXsL9kW9mj41KrxwfI_kdZy45j/view?usp=sharing

  



  If you could help with supplying what ffmpeg code we could use to have the output video, that would be great.

  


• Documentation #2094 : Déclarer ses objets éditoriaux - pipeline declarer_tables_objets_sql

  17 août 2011, par Eric Lupinacci

  Il existe aussi un fichier Google partagé que j’ai écrit avec Denisb et que Cédric a relu et corrigé : https://spreadsheets.google.com/spreadsheet/ccc?key=0Aq-LDsZ2YhzydDBvMjRSamQ5aWtfNWpKcnFESjQwU3c&hl=fr&authkey=CMmWhpEC