Laravel custom validation rules for videos. https://medium.com/@elizov/laravel-custom-validation-rules-for-videos-89cbc90c9d94

MaxVideoBitRate.php

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;
use FFMpeg\FFMpeg;

class MaxVideoBitRate implements Rule
{
    protected $maxBitRate;

    /**
     * Create a new rule instance.
     *
     * @return void
     */
    public function __construct(int $maxBitRate)
    {
        $this->maxBitRate = $maxBitRate;
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        $video = FFMpeg::create()->open($value->getRealPath());

        $videoInfo = $video->getStreams()->videos()->first();

        return $this->maxBitRate >= $videoInfo->get('bit_rate');
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return 'Exceeded the maximum allowed bitrate value.';
    }
}