free version Resolve 17.08; just upgraded OS from Win 7 to Win 10, so uninstalled Resolve 15 and installed new beta version.
Evidently all my MP4 videos from old droid phone have audio issues (about 3000 of them). After about 9-10 seconds the audio cuts out. I tried to make an optimized media version and this made the audio into an echo chamber. I tried to use Handbrake and re-encode and it does the same thing - echo chamber.
However I can import them OK into Adobe CS6. And then I can export, and then successfully import into Resolve. (I really don't want to edit these in Adobe!)
I can import MP4's successfully from just about every other source that I've tested including a droid from 2015, 2017, and everything since then.