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• FFMPEG undefined reference to `avdevice_register_all'

  23 février 2016, par user3177342

  I’m trying to build simple programm using ffmpeg

  #include 
  
   #include 
  
   #define __STDC_CONSTANT_MACROS
  
  extern "C" {
  
   #include <libavcodec></libavcodec>avcodec.h>
  
   #include <libavformat></libavformat>avformat.h>
  
   #include <libavformat></libavformat>avio.h>
  
  #include <libavdevice></libavdevice>avdevice.h>
  
  #include <libavutil></libavutil>time.h>
  
   }
  
  
  
  
  
  #include <iostream> 
  
  
  
  
  
   int main( int argc, char* argv[] )
  
   {
  
     AVCodec *icodec;
  
    AVFormatContext *ifcx = NULL;
  
    AVInputFormat *ifmt;
  
    AVCodecContext *iccx;
  
     AVStream *ist;
  
     AVStream *ost;
  
     AVPacket pkt;
  
     int i_index;
  
    int64_t timenow, timestart;
  
     int got_key_frame = 0;
  
  
  
     AVFormatContext *ofcx;
  
  
  
     const char *sProg = argv[ 0 ];
  
     const char *sFileInput;
  
     const char *sFileOutput;
  
    int64_t bRunTime;
  
  
  
    bRunTime = atoi( argv[ 2 ] ) * 1000000;
  
  
  
     // Initialize library
  
     av_log_set_level( AV_LOG_DEBUG );
  
     av_register_all();
  
     avcodec_register_all(); 
  
     avformat_network_init();
  
     avdevice_register_all();
  
  </iostream>

  And i get these errors

  g++ -o rtsp3 -I/usr/include -I/usr/local/include rtsp3.cpp -lavformat -lavcodec -lavutil -lm -lz -lva -lpthread
  /tmp/ccAXDgvi.o : In function

  main':
rtsp3.cpp:(.text+0x115): undefined reference to

  avdevice_register_all’
  /usr/local/lib/libavformat.a(matroskadec.o) : In function

  matroska_decode_buffer':
/home/user/projects/ffmpeg-git/ffmpeg/libavformat/matroskadec.c:1242: undefined reference to

  BZ2_bzDecompressInit’
  /home/user/projects/ffmpeg-git/ffmpeg/libavformat/matroskadec.c:1257 : undefined reference to

  BZ2_bzDecompress'
/home/user/projects/ffmpeg-git/ffmpeg/libavformat/matroskadec.c:1250: undefined reference to

  BZ2_bzDecompressEnd’
  /home/user/projects/ffmpeg-git/ffmpeg/libavformat/matroskadec.c:1262 : undefined reference to `BZ2_bzDecompressEnd’
  collect2 : error : ld returned 1 exit status

  I have git version of ffmpeg and successfully compiled it and make install.

• Find the files that have been modified in last 24 Hours only once(skip if its modified more than once) [duplicate]

  4 janvier 2020, par Vijay Chandra

  This question already has an answer here :

  • How to find the number of times particular file has been modified in given time range [closed]
    
    2 answers
    

  Im using this command to get all modified files in the last 24 hours in ubuntu,
  find -type f -name "*.mp4" -mtime -1 -printf "%f\n"
  How can i modify this to detect same file only once which means if same file is modified more than 1 time in the last 24 hours,It shouldnt consider this file,It should skip the file,Is there anyway to do this ?
  I need this to create a watermarking script which will find the latest files within 24hours and save the list to a txt file and with the help of this text file,I use ffmpeg to watermark the videos and move them to original location.If i do this,the find command is considering the new updated video as modified file and adding watermark again and again,The process isnt getting stopped,Someone please help to fix this.

  My code is attached below :

  #!/bin/bash find -type f -name "*.mp4" -mtime -1 -printf "%f\n" >> /home/domain.com/public_html/admin_panel/public_html/uploads/mp4/temp/file.txt filename='/home/domain.com/public_html/admin_panel/public_html/uploads/mp4/temp/file.txt' all_lines=`cat $filename` for item in $all_lines; do  cp $item /home/domain.com/public_html/admin_panel/public_html/uploads/mp4/temp ffmpeg -i $item -i watermark.png -filter_complex "[1][0]scale2ref=w='iw*30/100':h='ow/mdar'[wm][vid];[vid][wm]overlay=(main_w-overlay_w):(main_h-overlay_h)"
  
  -y /home/domain.com/public_html/admin_panel/public_html/uploads/mp4/temp/$item 
  
  done

• How many "Ruby on Rails" sites can be hosted using sub url in apache configuration file on apache4 with passenger4 on Ubuntu server ?

  17 octobre 2013, par user1731249

  Server's Hardware config :
  Ubuntu server 12.04, CPU : dual code (64-bit), RAM : 8GB, Disk : 200GB.

  Server's Software config :
  Apache2, Passenger4, Rails4, ruby2, MySQL.

  I'm developing a Ruby on Rails website which performs following tasks.

  1. Upload a series of images as zip.
  2. Extract zip images to temp directory.
  3. Convert series of images to video using FFMPEG.
  4. updating video info in MySQL db
  5. Viewing the video in HTML5 video tag.

  Maximum length of single video being 1min and on an average there may be 50 videos to be converted per day. I created three copies (Don't ask me why !) of same website and hosting three sites as sub-URLs like "example.com" being the domain and example.com/site1, example.com/site2, example.com/site3. Below is the Apache configuration :
  RailsAutoDetect off

  ServerName 127.0.0.1

      DocumentRoot /home/ubuntuuser/work/public
  
      ErrorDocument 404 /404.html
  
  
  
  RailsBaseURI /site1
  
  
  
      <directory></directory>home/ubuntuuser/work/site1/advisor/public>
  
              Allow from all
  
      Options -MultiViews
  
              RailsEnv production
  
      
  
  
  
  RailsBaseURI /site2
  
  
  
  <directory></directory>home/ubuntuuser/work/site2/advisor/public>
  
              Allow from all
  
      Options -MultiViews
  
              RailsEnv production
  
      
  
  
  
      RailsBaseURI /site3
  
  
  
  <directory></directory>home/ubuntuuser/work/site3/advisor/public>
  
              Allow from all
  
      Options -MultiViews
  
              RailsEnv production
  
      

  How many such sites can I host with sub-URLs without big performance drag ?
  Also please help to do a performance test for all the sub-URLs.