[tebasuna51]

From the changelog.txt:

* for gaps, edits & repairs > 1000ms eac3to now inserts silence by default
* for gaps, edits & repairs < 1000ms eac3to now loops audio by default
* option "-silence" forces eac3to to insert silence instead of looping audio
* option "-loop" forces eac3to to loop audio instead of inserting silence

If you want add 950 ms of silence:

-edit=0:57:58.000,950ms -silence

If you want repeat 950 ms, like is the default (<1000ms) is enough:

-edit=0:57:58.000,950ms