Cut the end off videos

[arrbee99 1815]

Am wondering if anyone might know an easy (repeat easy) way to cut 100 seconds off the end of a directory full of mp4 videos.

It seems to be easy to get rid of 100 seconds at the start using ffmpeg, but 100 seconds at the end of variable length mp4s not so much.

Thanks

[arrbee99 1815]

Don't know what it does, but this seems to work -

https://stackoverflow.com/questions/31862634/i-need-to-cut-mp4-videos-a-part-at-the-beginning-and-a-part-at-the-end-in-a-bat