Hi @benny_1,
That info is kept in the file_sync table, for instance:
mysql> select * from file_sync where object_id='0_62ko74sg'\G
*************************** 1. row ***************************
id: 28549
partner_id: 102
object_type: 1
object_id: 0_62ko74sg
version: 100002
object_sub_type: 3
dc: 0
original: 1
created_at: 2016-02-22 16:02:23
updated_at: 2016-02-22 16:02:23
ready_at: 2016-02-22 16:02:23
sync_time: NULL
status: 2
file_type: 1
linked_id: NULL
link_count: NULL
file_root: /opt/kaltura/web/
file_path: /content/entry/bigthumbnail/0/2/0_62ko74sg_100002.jpg
file_size: 51613
custom_data: a:1:{s:5:"isDir";b:0;}
deleted_id: NULL
Alas, there is no API to get that. Why do you need it, however? perhaps I can help you think of an alt solution..