Starting Your Rendering Scripts in a Command Line Terminal

Hello, I want to run an mlt script in the CLI.
Ubuntu 22.04.5 LTS

I made a 1-1.mlt script in Kdelint.

Then I run it $melt 1-1.mlt

The system issues this error:

Timestamps are unset in a packet for stream 1. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
[mp4 @ 0x7236c0200f80] Encoder did not produce proper pts, making some up.
[mp4 @ 0x7236c0200f80] Application provided invalid, non monotonically increasing dts to muxer in stream 1: 2880512 >= 2880512

This is a well known warning message you can safely ignore …

The process is ending, how do I ignore these errors, and what should I do next?
My English is bad, sorry.

Did it produce a file?

No. Maybe I’m doing something wrong.

I beg your pardon, it seems to have worked. My fault.