Why doesn't PHP exec or shell_exec work with ffmpeg?

Question

PHP

I run it through the console, everything is fine, and when through the php function exec or shell_exec, it kind of works, there are no errors, but there is no result, what it could be connected with, I copied the 1 to 1 command to the console, everything matches
there, as I understood the long-term command, that is he executes it over and over again and displays the result to the console, but as I understand it, php does not wait for the completion of the execution, how to make it wait for the conversion as well as in the console itself?

Answer 1

and php probably from the web server is launched? then server limits are possible.