How do you initially discard unwanted footage from your movies?

[agckent]

I have lots of long GoPro movies (e.g. 4 minutes) which contain very short (eg 5 seconds) sections which I want to preserve.  I want to extract the 5 seconds to a new file then delete the original 4-minute movie completely.

I know how to make a movie made up of several original footages from my Nikon and my Go Pro and export it to YouTube.

Up until now I have simply put all of the original footage movies of a  into a single project.

The trouble with that is the wastage of disc space for those 4-minute original GoPro movies which will contribute just 5 seconds of their content.

There are thousands of articles on trimming, and I know how to do that up to a point, but I cannot find a recommended workflow for initially permanently discarding the unwanted stuff.

For example, after a 2 week sailing trip  I might have 150 separate footages averaging  3 minutes each (7 hours 30 minutes in total) which contain on average 10 seconds each of potentially desirable content (25 minutes in total)   I would wish to add just those 25 minutes to my project for that trip which I would then probably reduce down to a final movie of about 6 minutes in length.

Any thoughts on the best approach would be appreciated.

[title edited by mod]

[rodneyb56060189]

I'm going to give this guy my 2 cents if I ever meet him....cause he refers to mux (multiplexing ) as the combining of various stuff into one output (or container)..

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John Johnson, Electronic Engineer / Software Programmer (1992-present)
Updated Feb 9 2018

A muxer is an engine or machine which will combine things such as signals in telecommunications. In media terminology a muxer will combine media assets - subtitles, audio and videos - into a single output resulting in containers such as a mp4, mpg, avi, mkv. Depending on the output you have chosen you may have additional options, such as adding multiple subtitle tracks (to support multiple languages), video tracks (extra footage such as “the making of” footage) or audio tracks (such as an added track for directors commentary).
Demuxing means the opposite: unraveling the assets (or signals in telecom) into raw assets again.
An mkv-muxer for example will combine the assets into *.mkv file. An avi-muxer will combine video and sound into a *.avi file. And so forth.

[MacHead2024]

i have EXACTLY the same problem. I really wish somebody would answer with simple to understand solution. People should realize that not everybody is PhD in computer science, nor that he/she spent their youth locked up in a dark basemnet behind computer. There must be a way.

[R Neil Haugen]

Make subclips.

Select all subclips from a bin, "create sequence from sekection".

Export sequence.

Delete original media.