Weird pixels on camera playback, fine in post

[Arthur Woo]

I came across something strange today that had me really concerned - I recorded some test footage on a gimbal and noticed that one of the frames had a ton of dead pixels in it. I loaded to the computer at the same timecode and they were not present in the image. What is going on here? I was doing a very high compression and high ISO since it was just test footage, could the settings have anything to do with it? Screen shot from red monitor compared to screenshot from redcine below

RED 5" Touch

REDCINE

 

[David Battistella]

Playback is about 1/4 resolution at 1080 and probably not full resolution either.

David

 

[Arthur Woo]

Playback is about 1/4 resolution at 1080 and probably not full resolution either.

David

Hi David, not exactly sure what you mean - are you saying that it has to do w/ the video playback in cam? Just need to be ready to explain to clients if they see it

 

[Keith Van Orden]

Rollback to previous firmware, re-blackshade, and see if they still appear.

 

[Arthur Woo]

Rollback to previous firmware, re-blackshade, and see if they still appear.

Thanks - is rolling back to previous firmware the same process as updating to the latest firmware?

 

[David Battistella]

Oh. I did not notice all the black dots center frame at first. Does it happen at lower iso? On all clips? Could it be the touchscreen?

Yes, rolling back firmware is the same procedure as upgrading.

David

 

[Tom Gleeson]

I have had a similiar experience where on multiple playbacks in the camera on the same frame in the same position I saw a similiar but smaller artefact that never then reappeared in RCX or in the final output via Resolve. This was a few months ago on a Weapon CF and it has not happened since. No explanation.

 

[Arthur Woo]

I have had a similiar experience where on multiple playbacks in the camera on the same frame in the same position I saw a similiar but smaller artefact that never then reappeared in RCX or in the final output via Resolve. This was a few months ago on a Weapon CF and it has not happened since. No explanation.

Thanks for posting!! This makes me feel slightly better

 

[Keith Van Orden]

Thanks - is rolling back to previous firmware the same process as updating to the latest firmware?

Yep, same process. If it's just one frame of one clip though, I wouldn't necessarily worry too much about it.

 

[Antony Newman]

---> Collect logs & send to RED.

If this is a FW issue, everyone will benefit from it being fixed.

AJ

 

[Arthur Woo]

They couldn't find anything on the logs and it was an isolated issue not appearing on any other of my mags. Recommendation is to update firmware.