lrv and thm files on gopro

Recently procured the latest model GoPro camera. Noticed there are some additional files created for each file, in addtional to the normal .mp4 file. What are these?

After a bit of research: 

.lrv file: it’s a big JPG file that has a bunch of screenshots grabbed from the video. Rename it to .Jpg (or just add a jpg to the end, ie file.lrv.jpg) and you can view it easily. 

.thm file: another mp4 format video file, but in a lower resolution. Also good for previwing your video in lower res, or even for doing edits, without having to deal with the potentially huge .mp4 file. Again, rename the thm file to .mp4 to make it easier to work with it. 

And lastely, the .mp4 file is the main video file. But you knew that already. 

How to add a password to a zip file

I used to use winzip back before it became a bloated absolute garbage piece of an app, and it was my no-brainer way of adding a password to a zip file whenever I needed to do so. Recently I needed to add a password to a zip I needed to email to someone, and in the process discovered that windows 7 no longer has the option to add the password (like windows xp had). Strange. Quickly decided that firing up xp mode (virtual pc) just couldnt possibly be the answer. I have winrar installed, so tried it, but couldnt find a way to do this either. Quick search revealed that 7zip has password capabilities. So I go download and install it.

I already had zipped my content into a zip file, so I just opened this in 7zip so I could add the pw – but no luck. I look through every menu and find nothing. Reading through the help file, I find references to adding the password on the commandline… so I started to think that maybe the commandline is the only way the password can be added. Argh.

Finally an associate showed me that you can select all the files you want to zip, right click on them, select 7zip, and select Add to archive. This pops up a “new archive” window that… sure enough… has the password settings right there in front of you.

Frustrating experience, but lesson learned, and best of all: I don’t have to use winzip.