How to burn slideshow
How to burn a copy of a slideshow created in Photos that I can play on my dvd player? Mac OS 10.15.4
27" iMac 2019
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First you need to export the slideshow as a movie file. Next you'll need a video DVD authoring application. The best ever app used to be iDVD but it is no long supported nor can run in Catalina. Therefore go to the App Store and search for "video DVD". You'll find a number of candidates which can be downloaded and run in demo mode before you purchase it.
In order to avoid creating bad video DVD discs follow this workflow to help assure the best qualty video DVD:
Once you have the project as you want it save it as a disk image via the File ➙ Save as Disk Image menu option. This will separate the encoding process from the burn process.
To check the encoding mount the disk image, launch DVD Player and play it. If it plays OK with DVD Player the encoding is good.
Then burn the disk image to disk with Disk Utility at the slowest speed available (2x-4x) to assure the best burn quality. Always use top quality media: Verbatim, Maxell or Taiyo Yuden DVD-R are the most recommended in these forums.
The demo versions of the apps will put a watermark across the slideshow. Once purchased the watermark is removed.