iMovie burned to DVD-R or +R will not play on iMac, MacBook Pro, or Blu-Ray DVD player.
On my iMac (late 2013, bought new in January 2015) I put together and then burned a 4.58 GB iMovie directly onto a DVD-R disk. At first it would only play on my MacBookPro 2011 with a very clear picture; later it wouldn't even play there. It failed to play properly on my Blu-Ray DVD player (choppy video then it froze one minute in; audio was fine) and my iMac (displaying the message "Supported disc not available"). At first, I burned the 30 minute iMovie onto discs with iDVD (from my iMac), dragging the 4.58 GB movie into the iDVD program. But that iDVD version (as listed in Finder) is a mere 40.2 MB, and it's a much less sharp version than the 4.58 GB version that won't play on any device. I have tried both DVD-R and DVD+R discs with the same result: "Supported disc not available." The iDVD 40.2 MB versions play on my MacBookPro, iMac, and Blu-Ray DVD player just fine but at a poorer visual quality. So (1) why won't these DVD's play on all of my devices? and (2) how can I get the sharp quality onto a DVD that will play on all my devices?
MacBook Pro, OS X El Capitan (10.11.4)