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Linux Support, Oracle Linux, Red Hat Enterprise Linux, SUSE, Oracle Unbreakable Enterprise Kernel and the Oracle Unbreakable Linux Support Program (ULN) resources, news, and support articles.

How to automate video screen grabs using ffmpeg

Part 1 of this 2-part series explains how to use VLC, a GUI-based video player, to capture single still frames from a video file. If you are taking many snapshots, you may find the manual VLC method too laborious. This post shows how to automate the capture process using ffmpeg, a command-line tool. Extract frame at a given instant The first scenario is to simply take a single snapshot at a given time instant.

keepalived mail notification

 
To get mail alerts from keepalived(on every start change from MASTER to BACKUP or BACKUP to Master) we need to add following code in keepalived.conf file:
global_defs {
  notification_email {
    user@hostname.com
  }
  notification_email_from lb-alert@hostname.com
  smtp_server your.smtpserver..com
  smtp_connect_timeout 30
}

Next add following line in keepalived.conf’s vrrp_instance VI_1 block:
smtp_alert
After adding smtp_alert in vrrp_instance VI_1 block your code looks like below:

keepalived mail notification

 
To get mail alerts from keepalived(on every start change from MASTER to BACKUP or BACKUP to Master) we need to add following code in keepalived.conf file:
global_defs {
  notification_email {
    user@hostname.com
  }
  notification_email_from lb-alert@hostname.com
  smtp_server your.smtpserver..com
  smtp_connect_timeout 30
}

Next add following line in keepalived.conf’s vrrp_instance VI_1 block:
smtp_alert
After adding smtp_alert in vrrp_instance VI_1 block your code looks like below:

The top 10 programming skills that will get you hired

SQLMost businesses and websites have databases that work behind the scenes and many of those databases rely on SQL.

How to capture still frame images from a video clip

I own a point-and-shoot digital camera which also shoots movies. As a novice photographer, I struggle in taking indoor evening pictures. Finally, I resort to first making a movie with the camera, followed by capturing still frames from the movie file. This post is part 1 of a 2-part series to explain the latter. In this post, we go over how to capture, using a GUI tool, a single frame from a movie file.

Tips and tricks: How to use Google like never before

http://www.hackcollege.com/wp-content/uploads/2011/11/google.gif

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