Speed up more than 50 times

[Austin]

How to speed up a video more than 50x

Try this: Take it to the max speed then export it using HuffYUV or Ut Video from the lossless preset. Make sure you have enough space because lossless exports can be big files depending on resolution and duration but they won’t lose any video quality when you re-encode them which is why I would suggest it here for this case. Then take that newly rendered lossless file and bring it to Shotcut and speed it up more.

To speed up or slow down audio more than 50x with good quality, consider Paul’s Extreme Sound Stretch:

http://hypermammut.sourceforge.net/paulstretch/

Updated version called PaulXStretch available here, and still free under GPL:

https://sonosaurus.com/paulxstretch/