I have added this one in php5.ini file but this does not solved my problem-
post_max_size = 750M upload_max_filesize = 750M max_execution_time = 5000 max_input_time = 5000 memory_limit = 1000M
I found one more suggestion in htaccess but not finding where should I append this one (not sure that this one will solve my problem)
LimitRequestBody
At present If I upload arround 700 mb file then it is ok but when I tried 900 mb or more sized image then it gives me this error. If can tell any other way to solve my problem that will really be helpful for me.