EOS R5 glitch during recording

[antiart]

I have Canon R5 and get this glitch through record.

Same story on reddit:

https://www.reddit.com/r/canon/comments/14t1ja1/r5_glitch/

Is it possible to explain it?

[rs-eos]

What media cards are you using?  Did you record to both cards? If so, does the corruption appear in the same image from both cards?

[antiart]

I was used Delkin Devices CFexpress type B 2TB as first and Sony 64GB SF-G UHS-II SDXC 300 MB/s as second.

R5 firmware 1.9.0
Manual NiSi Athena Lens was used.

Writing only on 1st card. 4k 25fps All-I. (second is installed)

I record the same shoots, every time max possible shoot 29:59. File size around 100 Gb.

It was first time when i get this glitch.

And it was just 1 frame from 30 min. But i get it on 4:30 (almost start of recording)

[rs-eos]

It does sound like an issue with the card.  Though hopefully this was a rare issue.

You may want to start capturing to both cards.  Depending upon what codec and resolution you need, that may not be possible to write to the slower SD card.  Though if you don't have one, do look into UHS-II SD cards that are rated at V90 (90 MBps / 720 Mbps).  The 300 MB/s value is a theoretical maximum read.  The V-rating represents a sustained write speed; something crucial for video work.

Your second card can also have a different codec used perhaps.  That would at least give you some sort of backup.

[antiart]

Thanks. I will try to do.

I hope one day in future firmware updates Canon will unlock recording to an external SSD drive, samsung T5-T7 etc. and remove 30 min ceiling for one shoot. It will help video guys like me.

[AtticusLake]

Here's a list of compatible memory cards for the R5: https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-R5-video-file-sizes-trouble-dow...

There's nothing by "Delkin" there.

CF Express memory card speeds are a big problem.  Because there is (essentially) no speed rating system for CF Express cards, you basically have to go with cards recommended by the manufacturer.  The numbers printed on the cards are worthless.  I made a video about this:

https://moonblink.info/MudLake/tech#Cards