[HELP] Specify parts of video to be encoded

[tasoss]

Hello.
I was wondering if it's possible to specify parts of video to be encoded.
Something similar to mkvmerge

--split parts:01:04:55-01:05:02.350,+01:21:57.850-01:21:15

Which selects  01:04:55-01:05:02.350 and then appends  01:21:57.850-01:21:15

Thanks.