So I've had this problem for months but FIOS support treats my like an idiot and gives me the standard "turn it off and on again" approach.
Basically when I'm watching a DVR recording of any show recorded on ABC, randomly and not always the playback video starts to stutter and get laggy, but audio is fine. I can pause, but there's a delay before the progress bar pops up. Once it does I can press play again and no more laggy video. I could also rewind and play it again with no issues. So it's nothing wrong with the raw video file or the live feed. Only on DVR playback.
After months of testing I've only ever had the issue on ABC (only tested HD channels) I don't have the lag issues on any other channels.
I've tried resetting the box, I've done the built in troubleshooter tasks found via the DVR menu, I've checked all the cables.
Anyone else have these symptoms, or have any suggestions on how to get around the first layer of scripted support staff that treats us like we're 12 years old using a tv for the first time? I can't reliably reproduce the problem, it's all very random.
EDIT: equipment: Model:VMS1100