How to get the program's response from the console into a variable?

Question

PHP

Hello everyone, I have a question.
There is a call to ffmpeg via the PHP passthru() function;
More precisely, I need to get information about the video in order to parse it later.
I do this for example:

$response = passthru('ffmpeg -i /home/dokuro/vedeos/60fps_FREELY_TOMORROW_-_Hatsune_Miku.mp4');

var_dump($response);

But in the end $response is NULL. But if I run the command in the terminal - I get the answer.
Also, if you execute a command, but tell it to write the answer to a file, it is written.

passthru('ffmpeg -i /home/dokuro/vedeos/60fps_FREELY_TOMORROW_-_Hatsune_Miku.mp4 2> result.txt');

How can I make it write to a variable? Is it possible?

Answer 1

Use the exec()
function . It has an array of strings that the command outputs.
It is possible that the command will output one thing to the terminal, and return a slightly different one to the exec() function. In this case, try adding an output redirect to the end of the command:
ffmpeg ... 2>&1

Answer 2

php.net/manual/en/function.passthru.php

passthru('ffmpeg -i /home/dokuro/vedeos/60fps_FREELY_TOMORROW_-_Hatsune_Miku.mp4', $response);