[Aleksey Tarasov]

Also take a look at Keep Inside Regions option of Markers tool in Vegasaur.
You create regions that you want to keep and with one click you delete all unnecessary parts.

[Aleksey Tarasov]

Here’s how to do it with Vegasaur (if I understood you correctly).
As you described, hold Ctrl key and select events vertically.

https://www.youtube.com/watch?v=rByNwOswa-U

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[Aleksey Tarasov]

You can press Ctrl+Shift+E to temporarily hide envelopes and then create a fade…

[Aleksey Tarasov]

Sync Cursor can also bring a lot of trouble (unwanted keyframes), so always check this option before changing Pan/Crop settings.

[Aleksey Tarasov]

How do you create keyframes?
Turn on Sync Cursor option to sync it with timeline cursor.
Each time you change Pan/Crop settings, a new keyframe will be created automatically.

[Aleksey Tarasov]

Sounds like you accidentally selected Mask

[Aleksey Tarasov]

Uncheck solo mode from third track

[Aleksey Tarasov]

change this line:

string triminfo = String.Format(basename + “.mp4 ” + start + ” ” + duration);

to this:

string triminfo = String.Format(System.Globalization.CultureInfo.InvariantCulture, basename + “.mp4 {0:0.00} {1:0.00}”, start, duration);

[Aleksey Tarasov]

Vegasaur uses ffmpeg for trimming.
You should read this thread and use Nick’s script

[Aleksey Tarasov]

In Vegasaur use Split Events tool, which can do what OP wants.