Author Topic: Dealing with Focus Pixels in raw video  (Read 274023 times)

dragonsfire1981

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Re: Dealing with Focus Pixels in raw video
« Reply #750 on: September 28, 2021, 10:33:16 AM »
Canon EOS M and Danne's June build I'm using.

I'll upload a still image shortly illustrating the problem.

So you're saying short h.264 clips sometimes do have the problem? Or did you mean to say "(share a clip) a short H.264 clip (which) has the problem"


>> also a short H.264 clip has the problem

@dragonsfire1981

Which camera, which build? share a image showing the problem, also a short H.264 clip has the problem

theBilalFakhouri

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Re: Dealing with Focus Pixels in raw video
« Reply #751 on: September 28, 2021, 12:06:40 PM »
I meant to "share" short H.264 clip has the problem, just to make sure what kind of focus pixels you are having.

Actually I saw multiple EOS M users are reporting same problem with H.264 video with Danne build, most people didn't have the problem, it must be a quirk happening in specific cases, I don't have EOS M so can't test/help you much

This thread is about fixing focus pixels in RAW videos, you maybe want to report the problem in this thread:
https://www.magiclantern.fm/forum/index.php?topic=25781.0

In normal H.264 videos you shouldn't have focus pixels by default.
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dragonsfire1981

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Re: Dealing with Focus Pixels in raw video
« Reply #752 on: September 28, 2021, 12:40:32 PM »
Okay, that makes sense, and I'll report it to that thread shortly. I did see on another forum, referring to an older build that Zeek thinks it's something to do with the bitrate. Some of my h264 footage has no focus pixel problem whatsoever and I did change the bitrate a couple of times throughout the day so I'll run some tests to see what correlation i can find.

Can you reccommend, apart from the Vanilla nightly, what else is a most stable previous, recent ML build pherhaps where this problem is not known to occur?

I meant to "share" short H.264 clip has the problem, just to make sure what kind of focus pixels you are having.

Actually I saw multiple EOS M users are reporting same problem with H.264 video with Danne build, most people didn't have the problem, it must be a quirk happening in specific cases, I don't have EOS M so can't test/help you much

This thread is about fixing focus pixels in RAW videos, you maybe want to report the problem in this thread:
https://www.magiclantern.fm/forum/index.php?topic=25781.0

In normal H.264 videos you shouldn't have focus pixels by default.

Danne

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Re: Dealing with Focus Pixels in raw video
« Reply #753 on: September 28, 2021, 02:15:08 PM »
It's not known exactly what your issue is about so upload a file which clearly shows the issue before asking for other builds.

dragonsfire1981

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Re: Dealing with Focus Pixels in raw video
« Reply #754 on: September 28, 2021, 03:13:16 PM »
Hello Danne! Thanks for all the work you've done so far- really enjoyed learning to shoot RAW.

These are 3 stills taken from 3 bits of h264 footage. First two shots from the window of a train, third one the focus pixels a little fainter but can be seen on the pavement, I'll find a site to upload the videos shortly.   

https://ibb.co/kKWSbnB
https://ibb.co/mzkWn6s
https://ibb.co/WDJ9kPK







So far, from what I've gathered when I proactively select the H264 preset, it does not have the focus pixel problem. It's when the preset is not selected, and RAW video is turned off it seems to have that problem ie you can shoot h264 in more than one preset, but not having the h264 turned on seems to cause the problem.


It's not known exactly what your issue is about so upload a file which clearly shows the issue before asking for other builds.

Danne

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Re: Dealing with Focus Pixels in raw video
« Reply #755 on: September 28, 2021, 03:49:38 PM »
Ah, yes, now I know your issue. Look. My version originally was thought to only inherit raw video capabilities but after some consideration I decided to be able and use h264 mode. But by turning of raw video still won´t shut off crop rec presets so all those regs are still applied. Including focus pixel issues. The workaround is to enable h264 from within the preset menu here which also shuts off crop rec:

dragonsfire1981

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Re: Dealing with Focus Pixels in raw video
« Reply #756 on: September 28, 2021, 04:20:56 PM »
Thank you yes- I thought that was the workaround, I just shot three h264 clips with h264 preset applied and can confirm there are no focus pixels! Something else I was slightly confused by was that there are two levels of presets, level 1 when you press the set button (presets), and level 2 (startoff presets) when you press the play button. H264 isn't listed as a preset on the level 1 presets, so it seems like level 2 settings take precedence then?

Do you think in the next build, there may be a way that applies the h264 and crop shut off automatically when you turn off RAW video? Currently I think it confuses a few people as I saw on MLV Facebook group a few other people were getting this also.

It's a great build otherwise though!

The original h264 video clips for reference.

https://streamable.com/2fpvqm

https://streamable.com/o5ac0l

https://streamable.com/2fpvqm



Ah, yes, now I know your issue. Look. My version originally was thought to only inherit raw video capabilities but after some consideration I decided to be able and use h264 mode. But by turning of raw video still won´t shut off crop rec presets so all those regs are still applied. Including focus pixel issues. The workaround is to enable h264 from within the preset menu here which also shuts off crop rec:


Danne

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Re: Dealing with Focus Pixels in raw video
« Reply #757 on: September 28, 2021, 05:02:03 PM »
I won't change the behaviour, sorry.