Am trying to join two mp3 using variables from file path.

And its working very okay, now i want to add a cover Art photo to the concated mp3 output("audio_output" ).

How can i do that?

$shell = shell_exec(
"$ffmpeg_b -i {$audio_file_full} -i {$AudioLogo} -filter_complex \"[0:a][1:a]concat=n=2:v=0:a=1 \" -metadata artist=Music_Visit_www.example.com_Stream_Download_and_Upload_Musics -metadata title=$title2 -b:a " .
$convert_speed .
"k $audio_output 2>&1"
);