clip trim macro

in looking at the various ways to trim the in point on a clip, just need to backup the in point 2seconds (yes... to cover the transition for cued playback) i have noticed mixed results when applying the macro
for example

local-jog -50
mark-in-update

seems to work on some clips but mixed results on others

i did try a

set_item_prop

macro, but that ended up applying the same timecode to all other clips

i am curious what is the best command for an "any clip" situation
many thanks in advance!
-r
 
Ugh, this is from Tricaster DDR not 3play, not sure if they have this macro command:

Try with _scrub_to_time_from_beginning with a value of -2 then a _mark_in

for output its _scrub_to_time_from_end and _mark_out
 
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