I’m having an issue with what I think is corrupted dvr files on my walksnail vrx module.

First flight of the night or two will record fine, playback fine. After the first couple videos, it’ll record and the files will be there- but when I try to open them on my laptop I get an error that the file format isn’t supported.

It’s a recent development, no changes prior to it starting. I’m running whatever the latest firmware is on vrx module and vtx’s.

I’m going to try a different micro sd card tonight and see if that fixes things, but I’m hoping y’all might have some other suggestions for me to try. It doesn’t make sense to me that it’s an sd card issue since it was working fine prior, but, maybe I somehow damaged it during all of the inserting and ejecting.

It’s kind of important for me to be able to rely on video being recorded and viewable- if I crash it’s often my only clue on where to start looking if I can’t find my quad immediately.

Most likely a micro SD card issue, write speeds degrade as the card gets full as well as with age and occasionally go bad (hmmm kind of like my onboard memory...).

Thanks!

It’s a fairly new sd card, but, I’m finding it harder and harder these days to make sure that whatever I buy isn’t counterfeit- especially through Amazon.

I’ve got a new/unused one I’ll try tonight.

I was loosing like one video per night of flying a while back.
I think the Walksnail system is picky, but not well documented, on the SD card.
On my VRX a 32G card works better than a 64G card, same make, same speed, just different capacity (?)
My goggles seem to be more tolerant (again ?)

I was trying to use a 64gb card when I first got the vrx module. It really didn’t like that. Don’t know why. I’ve got an unused 32gb of the same make/model that’s currently in it that I’ll try tonight, if that doesn’t want to behave then I’ll see what I’ve got shoved in raspberry pi’s, in fc’s, and whatnot.

It would be nice to have a list of known good brands/speeds//whatevers that work well with the walksnails.

At one point, during my AxisFlying Cineon Z25 troubleshooting days, Sivis Joe at Caddx support said:

     "This is a sd card compatibility issue, you need to use a U3 64G card, such as SanDisk"

I was surprised with this requirement since it appears nowhere in any of their documentation nor on their website.  I asked about that but he would not elaborate.

And, as I said, I had problems getting a 64G card to work, but not a 32G card, so ..... (??????)

I believe each production batch can vary quite a bit, whether it is the flash chip or the controller, so sticking to a list doesn't necessarily work and on top you have counterfeits for the high end cards (or manufacturers moving to lower cost specs for popular models).

These $3 cards are only UHS1 and doubt anyone would bother to counterfeit them, but its from Patriot's "official" store and so far they seem to have worked out pretty well. Originally I bought them for my 1080p cameras, but in a pinch I've used them on action cameras to record 4k 120mb/s+ videos and didn't have any problems. I use the VRX these days mostly for ride-alongs, but I've probably had these cards in the VRX as well as some Samsung/Silicone Power 64gb and don't remember any issues, but its been a while. I pull out my cards a lot and forget to put them back in, or use them to sneakernet to the 3D printer, so having spares around is nice.

https://www.amazon.com/Patriot-Micro-Fla...B08KSV5KBM

Does Walksnail have a feature to "format" the card from the goggles? After a handful of sessions on the DJI o3 I was getting slow card errors randomly one day and then I was getting it on another air unit the next day. Ended up trying to format both cards which I did on a Windows PC but it did not correct the issue. Tried using the format feature from the goggles and the errors went right away.

I recalled Snowleopard commenting on that fixing "slow" card error issues on the original DJI Air Unit.

Do what servo said, always format in the goggles/ vrx.

I’ve been formatting via the vrx module because I can’t seem to find what format the vrx module uses…

Tonight I’m trying a PNY 32gb elite u1. It’s the first time I haven’t gotten a pop up telling me it’s a wrong/bad format after formatting it in the vrx and popping it in my computer, but, it’s also not a u3 like Quadflyer said Caddx told him to use, so, we’ll see how it goes.

I may just need to get some faster sd cards.

It seems to be happy with this sd card so far. We'll see how it does as I continue to write to it, eject it, dump and clear it over the next week or two.

Semi-related, every time I fly hd I'm amazed at how much more confidence I have flying when I can actually see wtf is front of me..

No doubt - basic analog video was holding me back, I believe. I have no problem trying new stuff now simply because I can see what I’m doing.

Glad you have a card that’s working now

(22-Aug-2023, 07:33 AM)Lemonyleprosy Wrote: Semi-related, every time I fly hd I'm amazed at how much more confidence I have flying when I can actually see wtf is front of me..

Yes this! People always talk about latency but if I can't see it quickly I ain't gonna see it slowly, lol...

(23-Aug-2023, 03:25 AM)ph2t Wrote: Yes this! People always talk about latency but if I can't see it quickly I ain't gonna see it slowly, lol...

Exactly. Being able to see where I’m going opens up my whole backyard to play in. Lower latency doesn’t mean a damn if all I see is blur or a poorly defined “maybe limb maybe leaf” blob that I can maybe try to power through and not end up having to get out my ladder and a pole?

I started trimming some of my trees back there. There’s some branches I wanna power loop over and whatnot.

Ok, I had the same problem with a broken video. The video is stored in the internal memory of my VRX module, so it's definitely not an SD card problem. The video still has a size, so I tried to repair it - and succeeded! I have used Video Repair Software 2.0.0.1 (Grau GmbH Hardware & Software Solutions © 2013 Grau GmbH), with a reference video, and (IMPORTANT) - settings (60 FPS).
That's how we can repair our videos, guys!