I got concerned because I was planning to burn some DVD's for family members. I reached out to members of my photography club and they provided the same information that 'elk' replied with.
What I don't still understand is why the quality of the DVD's from PhotoStage seem so much different than DVD movies I own. I'd need to burn them to 4:3 instead of 16:9 to see if that makes a difference. I found that the Zoom automation on a photo on DVD was very grainy.
I also found that I could not burn directly to my DVD from Export in PS. The resulting files could not be found when I went to play them. I have to save the DVD files then use a utlity to burn the ISO file to the DVD.
So 'Steve P', we are experiencing the result of the DVD standard. More details can be found on the web at places like this.
I know have to figure out how to create portable media to share with my family. I may have to break down and but a blue-ray burner and player 🙂
Some points I was forwarded:
When you create a DVD file, you have to down-res from your native size to 420p; and then when that gets played back on a modern TV - whether it be 1080p or a 4K - it is up-res’d (scaled up) ... and that makes those visual flaws even more visible. I don’t think there’s a win here at all.
Your real solution is to make Hi Res MP4’s and distribute them via sharing, YouTube or Vimeo or transferred one-to-one using a service like WeTransfer. Or perhaps you could make one and copy it to a DVD file (data not a DVD runnable disk) only for distribution, where it would be copied back to the computer to be played. But any digital distribution system would be better than that, easier and faster.
When it comes to videos, the terminology can get a bit confusing. MP4 is actually a "container" that generally includes a video track and an audio track (https://en.wikipedia.org/wiki/Comparison\_of\_video\_container\_formats). The way the video and audio is encoded is determined by the "codec." MP4 files can include video and audio tracks encoded by a variety of codecs. The most common video codec used in the MP4 "container" is "H.264" and a common audio codec is "AAC." Many slide show programs will generate MP4 files using these codecs. The resolution of MP4 videos can vary considerably. For the club photoessays, I recommend you encode at 1920x1080 resolution.