GH5 Digital distortion / band on GH5 recording

M

MrP

Member
Hi there,

I just started editing some footage shot on my GH5 and was alarmed to see some digital distortion for about 12 frames about 15 minutes into the recording. A screen shot is below.

distortion.JPG

This is the first time I've ever seen this. I'm wondering if anyone else has ever come across this. On this particular shoot I was using only a single card, so I can't confirm whether it was the writing of the file to the card or the actual capturing. After offloading the footage to my local drive and network, the card was cleared, so I also don't have a way to double check anything on the card (not sure what there would be to check).

The card was a SanDisk Extreme 128GB v30 Class 10. The recording was 4k 23.976 Quicktime MOV with VLog. The file size was 35.5GB. This "glitch" is in the original file (but again, I can't compare to the SD card, but I do use TerraCopy which would have indicated if there was a file difference). I'm on Windows 10, running the second to latest versions of Premiere and Media Encoder. It's seen both in premiere and in Media encoder. Converting the file in Media encoder gives me the same result.

Any thoughts on what could have caused this or suggestions on how to prevent this in the future?

Thank you,
Stephen
 
This is sometimes seen as data drop outs or corruption on sd cards. Do you format your cards in camera? or in computer?
Also sometimes allocation clusters/blocks get this corruption when you cut a file on SD card to paste it onto your computer, or dletes clips individually on your card when it it being accessed via card reader to your computer.
Best practice is to format cards in camera.
But even if you do sometimes cards just go kaput.
 
Ted Ramasola said:
This is sometimes seen as data drop outs or corruption on sd cards. Do you format your cards in camera? or in computer?
Also sometimes allocation clusters/blocks get this corruption when you cut a file on SD card to paste it onto your computer, or dletes clips individually on your card when it it being accessed via card reader to your computer.
Best practice is to format cards in camera.
But even if you do sometimes cards just go kaput.
Click to expand...

I have found in-camera formating to be quite inefective and now use this everytime
https://www.sdcard.org/downloads/formatter_4/
 
Ted Ramasola said:
This is sometimes seen as data drop outs or corruption on sd cards. Do you format your cards in camera? or in computer?
Also sometimes allocation clusters/blocks get this corruption when you cut a file on SD card to paste it onto your computer, or dletes clips individually on your card when it it being accessed via card reader to your computer.
Best practice is to format cards in camera.
But even if you do sometimes cards just go kaput.
Click to expand...

Thank you. Normally I format in-camera, but I know for certain I did not do it on this shoot. I'll be sure to do that from now on. I usually copy and paste the files from the SD card to the computer (and the second location). After verification of files in both locations (using TerraCopy), I delete the files from the card. I use two different card readers (one is Transcend, the other I don't recall, but it's not a generic reader). So it sounds more like it was an issue with the card, as opposed to the camera? If so, having the second card for redundant recording probably would have been beneficial- I wish I could verify this.

Thank you for your feedback, I appreciate it.

-Stephen
 
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