Memory leak using official resumable video upload for Youtube PHP API V3

Question

I try to upload large file in PHP to Youtube, using the API V3. I just copied the official code from there.

It perfectly works for small uploads (<100Mo). But when I try to upload large files, it returns :

    Fatal error: Out of memory (allocated 102760448) (tried to allocate 1048577 
bytes) in /homepages/40/d216486693/htdocs/uploadsys.php on line 143

The code I use is just below, and line 143 is $chunk = fread($handle, $chunkSizeBytes); My server can allow some more memory, but what if I try to upload 1GB size files ? In fact, the main problem is that if I check memory usage during the loop with chunk read & send, it never decrease !

It's just like if each chunk stays in memory... What can I do ? Tried to unset $chunk with no success

        $snippet = new Google_Service_YouTube_VideoSnippet();
        $filtre1 = array("'","'","'","\'");
        $snippet->setTitle(str_replace("\\","",str_replace($filtre1,"’",$title)));
        $snippet->setDescription("Descr");
        $snippet->setTags(explode(",",$keywords));
        $snippet->setCategoryId($ytcat);
        $status = new Google_Service_YouTube_VideoStatus();
        $status->privacyStatus = "unlisted";

        $video = new Google_Service_YouTube_Video();
        $video->setSnippet($snippet);
        $video->setStatus($status);
        $chunkSizeBytes = 1 * 1024 * 1024;
        $client->setDefer(true);
        $insertRequest = $youtube->videos->insert("status,snippet", $video);
        $media = new Google_Http_MediaFileUpload($client,$insertRequest,'video/*',null,true,$chunkSizeBytes);
        $file_size = filesize($videofile);
        $media->setFileSize($file_size);

        // Read the media file and upload it chunk by chunk.
        $status = false;
        $handle = fopen($videofile, "rb");
        $cc = 0;
        while (!$status && !feof($handle)) {
          //Line 143 below
          $chunk = fread($handle, $chunkSizeBytes);
          $status = $media->nextChunk($chunk);
          $cc++;
        }
        fclose($handle);

Answer 1

We've faced the same problem and solved it by reducing the chunk size. The official code sample of $chunkSizeBytes = 1 * 1024 * 1024; may cause the server to stop responding and report memory problems. Reduce the size of the chunks and try again.