MPDF not inserting image in pdf

You may face this problem while working with MPDF when you generate pdf file. this is due to mpdf is not accept full url of image.
for example this will no work:
"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCnfybluhgHSCRIheKE1OBIK11J0wE0xbBVKz5Wtni0_DBCUli5EzB9W_GTPcUSknpL7Yfg4xgngZbwg09rIvX-Fh7CvzWL5O3fIbIjQfbeQNNuyTgwfbHCtsAtUN9siO5_gMnqyXWMQY/s1600/video-watermark.jpg"

to overcome this problem you need to download that image in your server and use relative path while generating pdf. for example if your site name is : http://agalaxycode.blogspot.in/
then you need to create a folder "images" and save different name image from download  "https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCnfybluhgHSCRIheKE1OBIK11J0wE0xbBVKz5Wtni0_DBCUli5EzB9W_GTPcUSknpL7Yfg4xgngZbwg09rIvX-Fh7CvzWL5O3fIbIjQfbeQNNuyTgwfbHCtsAtUN9siO5_gMnqyXWMQY/s1600/video-watermark.jpg". suppose you have downloaded and saved it with the name "aa.jpg" in "images" foler.
After that use this relative path in MPDF "images/aa.jpg".
MPDF uses relative path rather than absolute path