Image and Video Manager has three tools that can help you to troubleshoot issues:

• Piez
• Perceptual quality previews
• Image and Video Manager dashboard

Each provides certain insights into what is actually happening to your images and videos.

Piez

Use Piez to gather additional information about your images and videos, including:

• The number of images and videos optimized on a webpage
• The total bytes saved for all processed media
• The percentage reduction in bytes for all processed media
• The size of an original (pristine) image or video
• The size and format of the derivative image or video
• Whether a derivative image or video has been real-time or offline optimized

Perceptual quality previews

Use perceptual quality previews to help determine why images were converted to an unexpected format.

Image and Video Manager dashboard

Use the Image and Video Manager dashboard to:

• Understand why images on mobile are heavier than expected
• See which pristine images and videos could not be processed, and why