I downloaded an image from a url such as "https://www.xxxx.com/filename.jpeg. I expected that that image is a jpeg image whose format is acceptable for Computer Vision Annotation Tool (CVAT). However, it was saved as filename.heif or filename.jpeg.heif, so it causes an error when I tried to create a task with that image because heif format is not acceptable in CVAT. (CVAT automatically downloads images and create a task once I put image urls and submit them.)

I usually put more than 1000 image urls to create a task, and it is really hard to find invalid url or image among them. Is there any way to find the "actual format" only by looking at the image url? Or can I just skip invalid urls in CVAT? Thank you.