In ntndArrayConverter::fromDataTimeStamp() we find
// pvAccess uses Posix time, NDArray uses EPICS time, need to convert
seconds += POSIX_TIME_AT_EPICS_EPOCH;
however, ADAravis passes the timestamp from the camera unmodified. Since there are probably not many cameras out there using timestamps based on the EPICS epoch this is guaranteed to be wrong. I would therefore suggest to let ADAravis convert the camera timestamp into an EPICS timestamp (by subtracting POSIX_TIME_AT_EPICS_EPOCH).
A bigger problem, unfortunately, is that GigE-Vision 2.0 cameras actually support PTP timestamps which use TAI; therefore, ADAravis should (at least optionally, if the camera supports PTP) convert TAI -> EPICS Time. The problem is that I know of no portable, efficient and automatic way to do that (while using a hack such as a global parameter that holds the 'current' offset and ignoring the fact that during a leap-second there my be inconsistent time stamps is easy).
Note that ADSpinnaker and ADVimba are also affected (I have seen that both vendors advertise GigE cameras with PTP support).
In
ntndArrayConverter::fromDataTimeStamp()we findhowever,
ADAravispasses the timestamp from the camera unmodified. Since there are probably not many cameras out there using timestamps based on the EPICS epoch this is guaranteed to be wrong. I would therefore suggest to letADAravisconvert the camera timestamp into an EPICS timestamp (by subtractingPOSIX_TIME_AT_EPICS_EPOCH).A bigger problem, unfortunately, is that GigE-Vision 2.0 cameras actually support PTP timestamps which use TAI; therefore,
ADAravisshould (at least optionally, if the camera supports PTP) convert TAI -> EPICS Time. The problem is that I know of no portable, efficient and automatic way to do that (while using a hack such as a global parameter that holds the 'current' offset and ignoring the fact that during a leap-second there my be inconsistent time stamps is easy).Note that ADSpinnaker and ADVimba are also affected (I have seen that both vendors advertise GigE cameras with PTP support).