Build the image sequence before recording
The image list is the timeline: its order becomes the order in the video, and each row keeps a separate seconds field. That makes it easy to let an opening image sit longer while a later detail moves on quickly. The canvas preview uses the same landscape framing as the recording.
A measured local export
For a browser check, I selected two image files, set both scenes to 2.5 seconds, and chose Warm pulse. The preview showed 5 seconds, and Chrome produced a WEBM download in 5.512 seconds on the test machine. That is an observed run for this combination, not a timing promise for another device.
Choose an output you can inspect
The recorder draws a 1280 × 720 landscape canvas at 30 frames per second. Chrome and Edge normally expose WEBM, while a browser that reports MP4 support can select MP4. The download appears only after the local recording completes.
Keep the project local
The page reads the selected files in this browser session. It has no upload endpoint and no account system; refreshing clears the temporary project. If you are working with a larger set, render a short selection first so you can check the pace on the device that will do the work.
More ways to start
For a direct photo conversion flow, try photo to video. For a soundtrack-first workflow, open slideshow maker with music. If you want a silent, short montage, continue to free slideshow maker.