upload_thumbnail.php

<?php

/**
 * This sample uploads and sets a custom thumbnail for a video by:
 *
 * 1. Uploading a image utilizing "Google_MediaFileUpload"
 * 2. Setting the uploaded image as a custom thumbnail to the video via "youtube.thumbnails.set" method
 *
 * @author Ibrahim Ulukaya
*/


// Call set_include_path() as needed to point to your client library.
require_once 'Google_Client.php';
require_once 'contrib/Google_YouTubeService.php';
session_start();

/* You can acquire an OAuth 2 ID/secret pair from the API Access tab on the Google APIs Console
 <http://code.google.com/apis/console#access>
For more information about using OAuth2 to access Google APIs, please visit:
<https://developers.google.com/accounts/docs/OAuth2>
Please ensure that you have enabled the YouTube Data API for your project. */
$OAUTH2_CLIENT_ID = 'REPLACE_ME';
$OAUTH2_CLIENT_SECRET = 'REPLACE_ME';

$client = new Google_Client();
$client->setClientId($OAUTH2_CLIENT_ID);
$client->setClientSecret($OAUTH2_CLIENT_SECRET);
$redirect = filter_var('http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'],
    FILTER_SANITIZE_URL);
$client->setRedirectUri($redirect);

// YouTube object used to make all Data API requests.
$youtube = new Google_YoutubeService($client);

if (isset($_GET['code'])) {
  if (strval($_SESSION['state']) !== strval($_GET['state'])) {
    die('The session state did not match.');
  }

  $client->authenticate();
  $_SESSION['token'] = $client->getAccessToken();
  header('Location: ' . $redirect);
}

if (isset($_SESSION['token'])) {
  $client->setAccessToken($_SESSION['token']);
}

// Check if access token successfully acquired
if ($client->getAccessToken()) {
  try{

    // REPLACE with the channel that you want to upload into
    $videoId = "VIDEO_ID";

    // REPLACE with the path to your file that you want to upload for thumbnail
    $imagePath = "/path/to/file.png";

    // Size of each chunk of data in bytes. Setting it higher leads faster upload (less chunks,
    // for reliable connections). Setting it lower leads better recovery (fine-grained chunks)
    $chunkSizeBytes = 1 * 1024 * 1024;

    // Create a MediaFileUpload with resumable uploads
    $media = new Google_MediaFileUpload('image/png', null, true, $chunkSizeBytes);
    $media->setFileSize(filesize($imagePath));

    // List associated content owners to get content owner id
    $setResponse = $youtube->thumbnails->set($videoId, array('mediaUpload' => $media));

    $uploadStatus = false;

    // Read file and upload chunk by chunk
    $handle = fopen($imagePath, "rb");
    while (!$uploadStatus && !feof($handle)) {
      $chunk = fread($handle, $chunkSizeBytes);
      $uploadStatus = $media->nextChunk($setResponse, $chunk);
    }

    fclose($handle);

    $thumbnailUrl = $uploadStatus['items'][0]['default']['url'];
    $htmlBody .= "<h3>Thumbnail Uploaded</h3><ul>";
    $htmlBody .= sprintf('<li>%s (%s)</li>',
        $videoId,
        $thumbnailUrl);
    $htmlBody .= sprintf('<img src="%s">', $thumbnailUrl);
    $htmlBody .= '</ul>';


    } catch (Google_ServiceException $e) {
      $htmlBody .= sprintf('<p>A service error occurred: <code>%s</code></p>',
          htmlspecialchars($e->getMessage()));
    } catch (Google_Exception $e) {
      $htmlBody .= sprintf('<p>An client error occurred: <code>%s</code></p>',
          htmlspecialchars($e->getMessage()));
    }

    $_SESSION['token'] = $client->getAccessToken();
    } else {
      // If the user hasn't authorized the app, initiate the OAuth flow
      $state = mt_rand();
      $client->setState($state);
      $_SESSION['state'] = $state;

      $authUrl = $client->createAuthUrl();
      $htmlBody = <<<END
  <h3>Authorization Required</h3>
  <p>You need to <a href="$authUrl">authorize access</a> before proceeding.<p>
END;
    }
    ?>

    <!doctype html>
    <html>
    <head>
    <title>Claim Uploaded</title>
    </head>
    <body>
      <?=$htmlBody?>
    </body>
    </html>