Php reads and saves base64-encoded video content

the front end gets the video address of base64
how does the server convert video files and store them in a folder?
$r = file_put_contents ($path, base64_decode ($videoData)); / / returns the number of bytes
) use the above code to store the video volume correctly, but why can"t you play the video

Mar.24,2021

take php as an example:

//  base64 
$video_url = base64_encode($base64);

$output_filename = "test.mp4";

$host = $video_url;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $host);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_AUTOREFERER, false);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_HEADER, 0);
$result = curl_exec($ch);
curl_close($ch);

print_r($result); 

// 
$fp = fopen($output_filename, 'w');
fwrite($fp, $result);
fclose($fp);
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b304bd-2bcf4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b304bd-2bcf4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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