reading video using vhdl

Thanks for your reply, i'm a very big beginner.. my experience only last 3 months in vhdl.. as what you have mentioned is not recommended for me what should i follow then??

let me tell you what i've did so far:

first: i've converted each frame into txt file

second: built ROM component where i saved file name in

third: read this file inorder to calculate mean value.. and so on

i'm having a question on what i did

is there any function that declares end of line since there is endfile() that declares if i've reached end of file

as i've noticed that when i use readline() i comes back with the first value in that line only and i should calculate mean over all of the file's value

one more question

i've been trying this statement

file mean_calc : text open read_mode is file_nm_str_sig;

where file_nm_str_sig is of string type & changes when ROM address changes

it was compiled successfuly with warning => (Initial value of "mean_calc" depends on value of signal "file_nm_str_sig")

but when i started simulation i got this error =>(Failed to open VHDL file "" in rb mode.)

although file_nm_str_sig is already having a value

is there any work arround to do that??

thanks,

Niveen..