diff --git a/include/api.php b/include/api.php
index 2c9ae9b38..543c01827 100644
--- a/include/api.php
+++ b/include/api.php
@@ -2693,19 +2693,29 @@ function api_get_entitities(&$text, $bbcode)
 		}
 	}
 
-	preg_match_all("/\[img](.*?)\[\/img\]/ism", $bbcode, $images);
+	preg_match_all("/\[img\=(.*?)\](.*?)\[\/img\]/ism", $bbcode, $images, PREG_SET_ORDER);
 	$ordered_images = [];
+	foreach ($images as $image) {
+		$start = iconv_strpos($text, $image[1], 0, "UTF-8");
+		if (!($start === false)) {
+			$ordered_images[$start] = ['url' => $image[1], 'alt' => $image[2]];
+		}
+	}
+
+	preg_match_all("/\[img](.*?)\[\/img\]/ism", $bbcode, $images);
 	foreach ($images[1] as $image) {
-		//$start = strpos($text, $url, $offset);
 		$start = iconv_strpos($text, $image, 0, "UTF-8");
 		if (!($start === false)) {
-			$ordered_images[$start] = $image;
+			$ordered_images[$start] = ['url' => $image, 'alt' => ''];
 		}
 	}
 	//$entities["media"] = array();
 	$offset = 0;
 
-	foreach ($ordered_images as $url) {
+	foreach ($ordered_images as $image) {
+		$url = $image['url'];
+		$ext_alt_text = $image['alt'];
+
 		$display_url = str_replace(["http://www.", "https://www."], ["", ""], $url);
 		$display_url = str_replace(["http://", "https://"], ["", ""], $display_url);
 
@@ -2752,6 +2762,7 @@ function api_get_entitities(&$text, $bbcode)
 							"url" => $url,
 							"display_url" => $display_url,
 							"expanded_url" => $url,
+							"ext_alt_text" => $ext_alt_text,
 							"type" => "photo",
 							"sizes" => $sizes];
 			}
diff --git a/mod/photos.php b/mod/photos.php
index fa4d5b281..fb43619b6 100644
--- a/mod/photos.php
+++ b/mod/photos.php
@@ -1567,7 +1567,7 @@ function photos_content(App $a)
 
 		$a->page['htmlhead'] .= "\n" . '<meta name="twitter:card" content="summary_large_image" />' . "\n";
 		$a->page['htmlhead'] .= '<meta name="twitter:title" content="' . $photo["album"] . '" />' . "\n";
-		$a->page['htmlhead'] .= '<meta name="twitter:image" content="' . $photo["href"] . '" />' . "\n";
+		$a->page['htmlhead'] .= '<meta name="twitter:image" content="' . System::baseUrl() . "/" . $photo["href"] . '" />' . "\n";
 		$a->page['htmlhead'] .= '<meta name="twitter:image:width" content="' . $photo["width"] . '" />' . "\n";
 		$a->page['htmlhead'] .= '<meta name="twitter:image:height" content="' . $photo["height"] . '" />' . "\n";
 
diff --git a/src/Content/Text/BBCode.php b/src/Content/Text/BBCode.php
index e2a4fa603..b2d4ebb5d 100644
--- a/src/Content/Text/BBCode.php
+++ b/src/Content/Text/BBCode.php
@@ -1102,7 +1102,11 @@ class BBCode extends BaseObject
 			if (substr($curl_info["content_type"], 0, 6) == "image/") {
 				$text = "[img]" . $match[1] . "[/img]";
 			} else {
-				$text = "[img]" . $match[2] . "[/img]";
+				if (!empty($match[3])) {
+					$text = "[img=" . $match[2] . "]" . $match[3] . "[/img]";
+				} else {
+					$text = "[img]" . $match[2] . "[/img]";
+				}
 
 				// if its not a picture then look if its a page that contains a picture link
 				$body = Network::fetchUrl($match[1]);
@@ -1120,7 +1124,11 @@ class BBCode extends BaseObject
 					}
 
 					if (strtolower($attr["name"]) == "twitter:image") {
-						$text = "[img]" . $attr["content"] . "[/img]";
+						if (!empty($match[3])) {
+							$text = "[img=" . $attr["content"] . "]" . $match[3] . "[/img]";
+						} else {
+							$text = "[img]" . $attr["content"] . "[/img]";
+						}
 					}
 				}
 			}
@@ -1132,7 +1140,8 @@ class BBCode extends BaseObject
 
 	public static function cleanPictureLinks($text)
 	{
-		$return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $text);
+		$return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img=(.*)\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $text);
+		$return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $return);
 		return $return;
 	}
 
diff --git a/src/Model/Photo.php b/src/Model/Photo.php
index f2a77b01f..c983fdc05 100644
--- a/src/Model/Photo.php
+++ b/src/Model/Photo.php
@@ -21,6 +21,7 @@ use Friendica\Protocol\DFRN;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
 use Friendica\Util\Security;
+use Friendica\Util\Strings;
 
 require_once "include/dba.php";
 
@@ -664,4 +665,48 @@ class Photo extends BaseObject
 
 		return true;
 	}
+
+	/**
+	 * Strips known picture extensions from picture links
+	 *
+	 * @param string $name Picture link
+	 * @return string stripped picture link
+	 * @throws \Exception
+	 */
+	public static function stripExtension($name)
+	{
+		$name = str_replace([".jpg", ".png", ".gif"], ["", "", ""], $name);
+		foreach (Image::supportedTypes() as $m => $e) {
+			$name = str_replace("." . $e, "", $name);
+		}
+		return $name;
+	}
+
+	/**
+	 * Returns the GUID from picture links
+	 *
+	 * @param string $name Picture link
+	 * @return string GUID
+	 * @throws \Exception
+	 */
+	public static function getGUID($name)
+	{
+		$a = \get_app();
+		$base = $a->getBaseURL();
+
+		$guid = str_replace([Strings::normaliseLink($base), '/photo/'], '', Strings::normaliseLink($name));
+
+		$guid = self::stripExtension($guid);
+		if (substr($guid, -2, 1) != "-") {
+			return '';
+		}
+
+		$scale = intval(substr($guid, -1, 1));
+		if (empty($scale)) {
+			return '';
+		}
+
+		$guid = substr($guid, 0, -2);
+		return $guid;
+	}
 }
diff --git a/src/Module/Photo.php b/src/Module/Photo.php
index bcfe13f53..4ec4f204c 100644
--- a/src/Module/Photo.php
+++ b/src/Module/Photo.php
@@ -53,15 +53,15 @@ class Photo extends BaseModule
 		switch($a->argc) {
 			case 4:
 				$customsize = intval($a->argv[2]);
-				$uid = self::stripExtension($a->argv[3]);
+				$uid = MPhoto::stripExtension($a->argv[3]);
 				$photo = self::getAvatar($uid, $a->argv[1]);
 				break;
 			case 3:
-				$uid = self::stripExtension($a->argv[2]);
+				$uid = MPhoto::stripExtension($a->argv[2]);
 				$photo = self::getAvatar($uid, $a->argv[1]);
 				break;
 			case 2:
-				$photoid = self::stripExtension($a->argv[1]);
+				$photoid = MPhoto::stripExtension($a->argv[1]);
 				$scale = 0;
 				if (substr($photoid, -2, 1) == "-") {
 					$scale = intval(substr($photoid, -1, 1));
@@ -117,15 +117,6 @@ class Photo extends BaseModule
 		exit();
 	}
 
-	private static function stripExtension($name)
-	{
-		$name = str_replace([".jpg", ".png", ".gif"], ["", "", ""], $name);
-		foreach (Image::supportedTypes() as $m => $e) {
-			$name = str_replace("." . $e, "", $name);
-		}
-		return $name;
-	}
-
 	private static function getAvatar($uid, $type="avatar")
 	{