Since switching from a RPi 3B+ to a RPi 4, I've noticed that when playing videos (1080p, x264 or x265, 23.976fps) there is occasionally a repeated frame. By 'occasional' I mean that the interval between repeated frame occurrences is often many minutes.
The log is posted here: KODI LE Log 20/2/2021 - Pastebin.com
The log event that seems to coincide with the repeated frames is:
2021-02-20 14:34:27.005 T:855 DEBUG <general>: CDVDClock::ErrorAdjust - CVideoPlayerAudio::OutputPacket - error:-27015.392602, adjusted:-41708.333333I'm fairly sure this is the offending error as the timing implied by 'adjusted:-41708.333333' is the length of time that one frame occupies at 23.976fps. I've tried watching the same movie on a RPi 3B+ running the same build of LE (latest nightly LibreELEC-RPi4.arm-9.80-nightly-20210220-f768c9b) and no such errors or repeated frames were evident.
For reference, the signal path is RPi 4 -> Yamaha RX-V381 AV amp -> Panasonic TX-P42ST50B.
Does anyone have any ideas why this is happening?
TIA, H.