Yes, using the LG app downloaded on the tv from the LG store. I find it hard to believe it hasn’t been reported, since I’ve found a number of people online saying they have the same issue, including a couple who responded to a previous post I made on your smart tv forum.
As I said, I’m fairly sure it’s the LG app, because the movies that have the sound sync problem on the tv so far do not have the problem on a Fire tablet, and just playing the raw mp4 on the computer through windows media or whatever never has the problem. I have not yet tried all the problem movies on the tablet, but the first three I tried had no problem on the tablet.
I’m seeing the problem, on my LG tv, on maybe 5-10% of the movies I’ve ripped and tested. Most movies are fine, but when I play the ones with the problem, the sound gradually gets increasingly ahead of the video. At any point, simply pausing and immediately restarting the play gets the sound back in sync, but then it begins drifting away again.
I ripped the movies using Handbrake, and aside from choose the Fast 720 something or other, I left all the default settings, and used the same settings for all movies. When I found this problem, I did try a variety of other settings, but none seemed to make a difference. I also tried ripping in MKV instead of MP4, and I tried the MakeMKV product as well; none of these things made a difference.
I have no idea what might be different about the movies with the problem. The problem occurs with a sort of motley assortment of movies, like Avatar, Forbidden Planet, Big, Get Shorty, The Abyss.
One additional note: just last week, I updated the Plex server software on the machine I’m using, then started testing. Contact, which was the first movie I noticed having the problem, now seems not to; however, right now I’m running Forbidden Planet, and it’s just as bad as ever.