EoS _ R error - digital horizontal dropout line

jann lipka wrote:

I got it on one of 500 images -
SanDisk SDXC Extreme Pro 64GB 300MB/s UHS-II V90
the line goes through all width of the image ( raw )
here is a crop - it is roughly 4 pixels high
is it card error or camera error ?

( i can see the line while reviewing on camera screen so it is not card reader )

Impossible to say on the basis of one single image. Easy enough to fix in Photoshop etc.

If it occurs again, you could try a different card but at 1 in 500 you may never work out where the problem lies.

However what you see on the rear screen is the embedded jpeg preview, which is a different size to the RAW image, yet written at the same time. So my suspicion is that it was more likely a camera glitch. What does it look like in your RAW processor?

jann lipka wrote:

I got it on one of 500 images -
SanDisk SDXC Extreme Pro 64GB 300MB/s UHS-II V90
the line goes through all width of the image ( raw )
here is a crop - it is roughly 4 pixels high
is it card error or camera error ?

( i can see the line while reviewing on camera screen so it is not card reader )

It's a card error as long as you don't have the line in the same position in other images.

save all the images from the card and do a full format (not quick) on your PC (not in camera).

Quarkcharmed wrote:

jann lipka wrote:

I got it on one of 500 images -
SanDisk SDXC Extreme Pro 64GB 300MB/s UHS-II V90
the line goes through all width of the image ( raw )
here is a crop - it is roughly 4 pixels high
is it card error or camera error ?

( i can see the line while reviewing on camera screen so it is not card reader )

It's a card error as long as you don't have the line in the same position in other images.

save all the images from the card and do a full format (not quick) on your PC (not in camera).

It’s an interesting question, but why would a card error cause the same line to be visible in the same place on both the RAW image and in the embedded, smaller, jpeg image? That implies a camera error, written to both images at the same time.

Given the OP has only had one such image, it would be hard to be sure where the fault lies until (or if) it recurs.

drsnoopy wrote:

Quarkcharmed wrote:

jann lipka wrote:

I got it on one of 500 images -
SanDisk SDXC Extreme Pro 64GB 300MB/s UHS-II V90
the line goes through all width of the image ( raw )
here is a crop - it is roughly 4 pixels high
is it card error or camera error ?

( i can see the line while reviewing on camera screen so it is not card reader )

It's a card error as long as you don't have the line in the same position in other images.

save all the images from the card and do a full format (not quick) on your PC (not in camera).

It’s an interesting question, but why would a card error cause the same line to be visible in the same place on both the RAW image and in the embedded, smaller, jpeg image? That implies a camera error, written to both images at the same time.

Depends on how in-camera previews are actually displayed.

Given the OP has only had one such image, it would be hard to be sure where the fault lies until (or if) it recurs.

Corrupted RAM in raw data (before it was written to the card) would likely result in a few corrupted pixels, not the whole row.

It could be a sensor glitch but I understand it never repeated. If this happens again, it can be a problem in the sensor.

To make sure, the OP could try and extract the actual embedded jpeg from the raw file. If both raw and jpeg are corrupted, then I was wrong and it was an in-camera glitch.

Quarkcharmed wrote:

drsnoopy wrote:

Quarkcharmed wrote:

jann lipka wrote:

I got it on one of 500 images -
SanDisk SDXC Extreme Pro 64GB 300MB/s UHS-II V90
the line goes through all width of the image ( raw )
here is a crop - it is roughly 4 pixels high
is it card error or camera error ?

( i can see the line while reviewing on camera screen so it is not card reader )

It's a card error as long as you don't have the line in the same position in other images.

save all the images from the card and do a full format (not quick) on your PC (not in camera).

It’s an interesting question, but why would a card error cause the same line to be visible in the same place on both the RAW image and in the embedded, smaller, jpeg image? That implies a camera error, written to both images at the same time.

Depends on how in-camera previews are actually displayed.

Given the OP has only had one such image, it would be hard to be sure where the fault lies until (or if) it recurs.

Corrupted RAM in raw data (before it was written to the card) would likely result in a few corrupted pixels, not the whole row.

It could be a sensor glitch but I understand it never repeated. If this happens again, it can be a problem in the sensor.

To make sure, the OP could try and extract the actual embedded jpeg from the raw file. If both raw and jpeg are corrupted, then I was wrong and it was an in-camera glitch.

My understanding is that the review image on the LCD/EVF is the embedded jpeg.  To support this contention, the review always includes the in-camera corrections that are active, and these are only applied to jpeg, not RAW.  This leads me to the conclusion it is a camera (sensor, processor, or somewhere in the image pipeline) glitch.

A simple way of viewing the embedded jpeg is to use FastStone viewer, which opens the embedded jpeg for preview on screen.

Hopefully for the OP it won’t recur.