Update : Audio is actualy lagging video so lip synch adjustments of TV and Sound bar can not correct they only offer a delay. Was able to "re-synch" by toggeling the Game Latency option on then back off on my Vizio P55-f1 to correct this once the lip synch starts happening.
Tried several setting changes, tried Optical Audio connection, Game mode verses normal, but since its not an input lag issue none of this helps.
It seems it may be related to HDMI Handshaking issue, but I was able to get better results down scaling to 1080p. It seems the XCG1v4 box has trouble outputting 4K and audio once you start to fast forward/rewind etc in DVR recordings or Apps.
Might test by running HDMI from DVR to Soundbard and then out to TV to see it this changes anything by having audio require less decoding etc..
Has no ONE else really seen this issue since June 01 with the 4K boxes???
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Up until 2 weeks ago I have had zero issues with playback on my X1 XG1v4 4k box (Had for almost 1 year). I have connected to Vizio 4K TV using HDMI and sound through Vizio Soundbar utilizing ARC. NO issues with HDR content at full resolution, or any sound issues.
Just around 2 weeks ago we started to notice the lips did not match the audio on DVR recordings and when watching videos in the X1 Apps. This only occurs once your fast forward or use the 30second skip feature. It can be corrected by either exiting the app/ DVR recording or swithing inputs and starting again. This is a very frustrating experience especialy since I was so sure it was the box itself after extensive troubleshooting.
I recieved a new box on Friday and the same exact thing happens sometimes worse then the original box. I replaced the HDMI cables as part of intitial troubleshooting and also verified by swapping to Optical sound cable using bitstream.
This is a BOX related issue. Has there been an update that could be causing this? I do not want to order another box to just suffer with the same eratic and intermittant playback issues. Please provide some insight into this, there must be more people experiencing this issue as it looks to be related to an update to the firmware or software of the units.
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