About this topic:
The Advance Series does support JPEG formats that include Progressive, optimized for web, and even high resolution photos. The challenge is to do the processes within 3 secs, 5 secs or 10 secs. Some photos that are high resolution and Progressive so they can take 15 secs to be processed.
The suggestion if the duration is too high is to use a tool, like Faststone, to remove the additional Progressive scans and reduce the resolution of the photos to the frames resolution. This will optimize the photos to be shown in the 3 secs and 5 secs option.
We are working on an update due out soon to offer higher transitions of 15 secs to make the timing more consistent but getting the transition time down to 3 secs or 5 secs will require the resizing and removal of the progressive scans.
Here's how it's done:
On a Windows PC, download the Windows version and run Faststone from this Faststone.org site: http://www.faststone.org/FSResizerDownload.htm
Install, deselect other product downloads and install as needed.
Run the Faststone application,
Browse and select your photos to be resized
Add your photos to the right hand list.
In the Output Format select JPEG Format,
Ensure Progressive is not checked.
Next, On output folder, Pick a folder to store the new converted files.
Next, Click the box "Use Advanced Options"
Click on Advanced Options
On the Resize Tab, Check Resize box
Select "Pick a standard size" and then click the Resolution of your frame. 1024x768 for instance.
Check box to "Preserve Aspect Ratio" and
"Do not resize if image is already lower than requested size."
Next, Click Convert and the files will be processes to the folder selected above.
Were almost done:
The newly converted photos can be placed on a USB Flash Drive or SD Card that will display in the 3 secs or 5 secs time delay.
For a Mac, please use similar setting while reviewing this this KB Article: https://support.nixplay.com/hc/en-us/articles/212722203-Resizing-and-Renaming-Photos-using-iPhoto-using-MAC