"unable to locate package libavcodec-extra-52"

[Morgan S]

Hello,

I'm following the installation guide and i got this error message when trying to install the libavcodec-extra-52

any help would be appreciated. 

[Morgan S]

the text inputted into terminal:

"sudo apt-get install libavcodec-extra-52"

also getting an error for this: 

"sudo apt-get install libgl1-mesa-dev"

unable to locate package

[Morgan S]

"also getting an error for this: 

"sudo apt-get install libgl1-mesa-dev"

unable to locate package"

this has been fixed but moving further down to "pwomxplayer --tile-code=$n –o local udp://239.0.1.23:1234?buffer_size=2000000B" the error file "-o" not found