How convert file mp3 to mp4

[DanielKotecki]

Hello I have a problem with convert my file mp3 to mp4 in laravel i write a code but dont work

$mp3FilePath = '/uploads-temp/sample.mp3'; $midBitrate = (new X264)->setKiloBitrate(500); FFMpeg::fromDisk('public') ->open($mp3FilePath) ->export() ->toDisk('public') ->inFormat($midBitrate)->resize(300,400) ->toDisk('public') ->save('sample.mp4');