BRAW pixel glitches during playback

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Andrew Gleason

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BRAW pixel glitches during playback

PostWed Aug 14, 2019 8:36 pm

When I attempt to watch playback on, or render out files from BRAW footage, I get this weird pixel-sized dots that appear all over my screen and move around on the footage. This is true for footage from both my pocket 4k and the new downloadable footage from the pocket 6k. This happens both with Metal and OpenCL selected in my resolve 16 preferences. I have attached a few screenshots as examples. Hopefully the handful of strange pixels (they almost look like stuck pixels except they dance around and change every frame) show up after the compression of the upload.

I am working with an iMac pro with a vega 64. Any help to let me use my BRAW footage without errors would be greatly appreciated. I will add that if I work with prores footage there are no issues. There are also no issues with r3d footage in raw.
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Screen Shot 2019-08-14 at 3.28.55 PM.jpg
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Screen Shot 2019-08-14 at 3.18.28 PM.jpg
Screen Shot 2019-08-14 at 3.18.28 PM.jpg (698.81 KiB) Viewed 2051 times
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Andrew Gleason

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Re: BRAW pixel glitches during playback

PostThu Aug 15, 2019 12:51 pm

If it helps at all, the same glitches show up in the blackmagic raw player as well.
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Rohit Singhal

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Re: BRAW pixel glitches during playback

PostFri Aug 16, 2019 9:19 am

Can you send us a sample clip that shows this? Also your captured logs please
viewtopic.php?f=21&t=71894
Rohit Singhal
DaVinci Resolve Software Development
Blackmagic Design
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Andrew Gleason

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Re: BRAW pixel glitches during playback

PostWed Aug 21, 2019 3:54 pm

Thanks for offering help!

Here is a sample clip showing the glitch you can download: https://uofi.box.com/s/ydvh69xdslyqwtssqxsnmtsavjqxtzt7

I have attached the log you asked me to create as well.

Also worth noting, I can also create these white pixel glitches on any shot that I use temporal NR on. It just also happens on BRAW footage before I do any grading whatsoever.
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Rohit Singhal

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Re: BRAW pixel glitches during playback

PostThu Aug 22, 2019 5:39 am

What you have sent is a .mov rendered from the source maybe. We need the .braw clip which you are decoding.
Rohit Singhal
DaVinci Resolve Software Development
Blackmagic Design
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Andrew Gleason

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Re: BRAW pixel glitches during playback

PostThu Aug 22, 2019 2:15 pm

Rohit Singhal wrote:What you have sent is a .mov rendered from the source maybe. We need the .braw clip which you are decoding.


It is the 6k fashion braw clip provided by blackmagic on their website half way down the page here: https://www.blackmagicdesign.com/produc ... a/workflow

Also, this happens with all braw clips from all cameras I have tested.
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Andrew Gleason

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Re: BRAW pixel glitches during playback

PostTue Aug 27, 2019 6:42 pm

To add some new information, the plugin that lets you open BRAW footage in premiere does NOT have the strange pixelated errors that I see when viewing inside of resolve, leading me to believe this isn't a hardware related issue.
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Pixelator

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  • Real Name: Patrick Haas-Baer

Re: BRAW pixel glitches during playback

PostTue Dec 28, 2021 4:49 pm

Hi there,

I have the same problem with my braw recordings from my Lumix S1 :(

When I get these pixel glitches it looks like a dead pixel flashing up for a split of a second then it is gone and some frames later some other pixels on other places of the screen flashing up and so on.

This is the first time I realized this. The shots I made were in the dark at native iso 4000, braw q3 on a video assist 5" 12G with condor blue hdmi cable.

It looks like there is an other person running into the same problem as well. :!:
viewtopic.php?f=18&t=148160&p=792883&hilit=braw+pixels#p792883

The pixel glitches are in the braw file and show up in resolve as well as in premiere pro.

Is there a problem with braw or the video assist?

Regards
Patrick
Attachments
vlcsnap-2021-12-28-17h24m22s943 (Mittel).png
vlcsnap-2021-12-28-17h24m22s943 (Mittel).png (1023.51 KiB) Viewed 762 times
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Pixelator

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  • Real Name: Patrick Haas-Baer

Re: BRAW pixel glitches during playback

PostWed Dec 29, 2021 12:22 pm

Hello again,

I tested again by filming a greycard and can confirm that the pixel errors seems to come from an faulty cable. As I swiched the cable, the pixel errors are gone, as by now.
I will still have an eye on this behaviour and let you know if it happened again.

Regards
Patrick

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