ServerBuddies Support Blog

Getting Started

1.

 First, install OpenSSH on two UNIX machines, hurly and burly. This works best using DSA keys and SSH2 by default as far as I can tell. All the other HOWTOs I’ve seen seem to deal with RSA keys and SSH1, and the instructions not surprisingly fail to work with SSH2.

2.

On each machine type ssh somemachine.example.com and make a connection with your regular password. This will create a .ssh dir in your home directory with the proper perms.

3.

On your primary machine where you want your secret keys to live (let’s say hurly), type

This will prompt you for a secret passphrase. If this is your primary identity key, make sure to use a good passphrase. If this works right you will get two files called id_dsa and id_dsa.pub in your .ssh dir. Note: it is possible to just press the enter key when prompted for a passphrase, which will make a key with no passphrase. This is a Bad Idea ™ for an identity key, so don’t do it! See below for uses of keys without passphrases.

4.

Copy the id_dsa.pub file to the other host’s .ssh dir with the name authorized_keys2.

5.

Now burly is ready to accept your ssh key. How to tell it which keys to use? The ssh-add command will do it. For a test, type

This will start the ssh-agent, add your default identity(prompting you for your passphrase), and spawn a bash shell. From this new shell you should be able to:

6.

This should let you in without typing a password or passphrase. Hooray! You can ssh and scp all you want from this bash shell and not have to type any password or passphrase.

This is a common error when we issue a “php -v” over command line or when we browse a phpinfo.php on a site.

To quickly fix this problem you will need to recompile your ffmpeg-php again.

How we fix this?

1)

remove/comment the call to av_free_static()

save.

2)

rebuild ffmpeg-php and place the new ffmpeg.so on your extension directory.

Should be fixed.

On the last few months, we have seen a lot of customers trying to setup his own Video Sharing site (ex: youtube clone) with no luck, the implementation it’s not that hard to setup your linux server to allow video streaming. There are a lot of youtube sites around that may do this, what you only need is to setup your linux system to work with the requirements. Due this we have made this HOW TO FFMPEG post so customers and non-customers would do this by their end.

Requirements:

FFMPEG
FFMPEG-PHP
Mplayer
Mencoder
flv2tool (RUBY ON RAILS REQUIRED)
LAME MP3 Encoder
Libogg
Libvorbis

—————————–

1) We download all the necessary packages.

2) in order to install all the packages, we extract all of them.

3) We create a codecs directory so we can use it as default codec dir later. Then we copy the mplayer codecs to the new directory.

4) We create a temporary TMP dir in order to safe compile everything.

5) We start compiling & installing packages

a) For LAME:

b) For LIBOGG:

c) For LIBVORBIS:

d) For FLVTOOL2:

e) For MPlayer:

f) For FFMPEG:

Some necessary linking,

e) For FFMPEG-PHP:

Finally, we include the ffmpeg-php module to our php.ini

Restart apache:

DONE!

Your installation is finish, now you need to check if the video streamin is working correctly on your website.

Keep in mind that most of the sites have different video rate conversion, this does not mean the installation is wrong, you will need to look on the PHP code of your video streaming site to see if its using ffmpeg and mencoder command line properly.