Compare 2 timestamps each in its own timebases.
The result of the function is undefined if one of the timestamps
is outside the int64_t range when represented in the others timebase.
@return -1 if ts_a is before ts_b, 1 if ts_a is after ts_b or 0 if they represent the same position
Compare 2 timestamps each in its own timebases. The result of the function is undefined if one of the timestamps is outside the int64_t range when represented in the others timebase. @return -1 if ts_a is before ts_b, 1 if ts_a is after ts_b or 0 if they represent the same position