Same-Day Photo Slideshow Edit

I have 21 high-resolution photos ready to go and one music track already selected. I need a clean, elegant slideshow exported as an MP4 for easy sharing and turned around today.

Here’s the flow I’m after:
• Each photo on screen for a full 4 seconds.
• Smooth dissolve transitions between every image, no fancy effects beyond that.
• Music track laid underneath from start to finish, trimmed or faded as needed so the video ends neatly with the last frame.
• No titles, captions, or graphics—just the photos and the soundtrack.

Please keep color, aspect ratio, and resolution exactly as supplied; no cropping unless a quick pan-and-zoom helps maintain aspect without black bars. The finished file should be ready for immediate upload to email, cloud drives, or messaging apps.

Deliverable:
1. Final MP4 slideshow (H.264, 1080p preferred).
2. Confirmation that timing matches 4 s per photo and audio is synced.
3. Quick note on any minor edits you felt necessary (e.g., audio fade length).

If you can meet the same-day deadline, I’d love to award this quickly and get the files sent over right away.