Originally Posted by StanGeek
Hi, the audio seems to be ahead of the video.
OK this means that the video processing going on in your Display is taking enough time that you see the delay as audio ahead of video.
First, you may be able to cure this by disabling video "enhancement" processing in your Display. Such settings are typically remembered per-input, so be sure to check while viewing the HDMI 1 video from the OPPO.
(In general, it is good to leave such video "enhancement" processing disabled. It is designed to make poor content look less crappy, and just gets in the way when viewing high quality content.)
Some displays use excessively long time to handle 1080p/24 video. Check if THIS is the problem by setting Setup > Video Setup > 1080p/24 Output to OFF.
if you can't find a quick cure this way, then you can adjust for the problem by telling the OPPO to apply the right amount of additional audio delay to compensate. This is in Setup > Audio Processing > A/V Sync. Positive values add audio delay.
Test this using content of known sync quality. I.e., a calibration disc. Real movie content often has INHERENT sync errors in the content. Any sync error which varies scene to scene is definitely in the content.
Good sync test charts are found on Spears & Munsil v2, Blu-ray, available from OPPO and on Disney's "WOW, World of Wonder", Blu-ray, available from Amazon.