there's a strange (visual) bug displaying the start / end times with any partial filter.
(To easily reproduce, use the "Replace by black filter, since it's partial by default)
Timestamps up to 1h : 11m : 34,967s (4294967 milliseconds) show up right;
Later timestamps, starting with 1h : 11m : 34,968s (4294968ms), show up as being calculated modulo by this value (as mentioned, only visually in the filter list)
1h : 11m : 34,968s > 0:00:00,000
1h : 11m : 34,969s > 0:00:00,001
1h : 11m : 44,968s > 0:00:10,000
....
Tested with win64 2.6.19 Final and nightlies r170420_win64Qt5_402 & 2.7.0_r170422_win32
Should be fixed by [partial] Fix start/end time in the description (https://github.com/mean00/avidemux2/commit/49c81a13a423d2e4849fdc3557f88228968725da), thank you for your report.