Q3 video quality degrades over 5 minutes

[axio]

Advertisement (gone after registration)

I was doing videography the other day, I wanted to share this experience with you guys.

I captured a 5 min video in C8K 30fps. Throughout this short recording, the video quality degrades over time.

I am showing the magnifications of a frame at the beginning and of a frame at the end. The clarity looks different to me. How's your experience?

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

Just to add, all settings was in manual ie. focus, aperture, shutter speed etc.

Edited December 5, 2023 by axio

[frame-it]

59 minutes ago, axio said:

I was doing videography the other day, I wanted to share this experience with you guys.

I captured a 5 min video in C8K 30fps. Throughout this short recording, the video quality degrades over time.

I am showing the magnifications of a frame at the beginning and of a frame at the end. The clarity looks different to me. How's your experience?

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

Just to add, all settings was in manual ie. focus, aperture, shutter speed etc.

 

the 2nd tree image looks sharper than the 1st one.

 

is the video Variable Bitrate?

 

Edited December 5, 2023 by frame-it

[axio]

51 minutes ago, frame-it said:

the 2nd tree image looks sharper than the 1st one.

 

is the video Variable Bitrate?

 

The 2nd images are from the beginning of the video, the 1st images are from the end (at about 5mins in). My apology for the reversed upload order.

The bitrate appeared to be constant in the manual. But I honestly don't know if it is variable or not.

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

[nariza7]

Curious what findings come from this

[axio]

10 minutes ago, nariza7 said:

Curious what findings come from this

That's also what'd like to find out.

The most immediate feeling is that the sensor overheats in 5 minutes already.

[Miltz]

I don't see any real difference in there images you shared. 🙈 Also who's going to zoom into a video like that?

Edited December 6, 2023 by Miltz

[axio]

Advertisement (gone after registration)

1 hour ago, Miltz said:

I don't see any real difference in there images you shared. 🙈 Also who's going to zoom into a video like that?

Understandably, the qualify degrade doesn't bother all, and not everyone zooms into a video like that.

I, on the other hand, noticed the problem because I had to zoom in, eg by cropping into 2k from 8k. For the faces that I was looking into, the qualify difference is even bigger.

[FusionX.Photo]

Just shot 3 hours of 4K with zero issues other than mediocre AF performance, maybe it’s not holding focus, wouldn’t surprise me.

[axio]

35 minutes ago, FusionX.Photo said:

Just shot 3 hours of 4K with zero issues other than mediocre AF performance, maybe it’s not holding focus, wouldn’t surprise me.

I was on manual focus already

[axio]

21 minutes ago, AussieQ said:

Why are you bothering pixel peeping 8k video????????

 

Seriously, dont stress yourself over pixel peeping a frame of video, its pointless. You can pixel peep a photo but video........been filming over 30 years and never pixel peeped video. 

need to crop down to 2k or even 1k

[FusionX.Photo]

4 hours ago, axio said:

need to crop down to 2k or even 1k

Then you are using the wrong tool for the job, get a Sony and some G master glass

[Pelu2010]

Maybe you put the video through topaz

then it will be extremely sharp …. 
 

[axio]

51 minutes ago, FusionX.Photo said:

Then you are using the wrong tool for the job, get a Sony and some G master glass

Right or wrong, it is a matter of perspective. All I want is to be able to record 10 minutes of c8k video with quality and consistency, not even the 20minutes that was promised.

[axio]

29 minutes ago, Pelu2010 said:

Maybe you put the video through topaz

then it will be extremely sharp …. 
 

That's worth a shot!

Thanks for the advice

[BJohn]

Honestly, I am not seeing a degraded quality. It looks more blurry, that is true. Like a soft Gaussian Blur was applied, but I would rather link that to lens or focus. Of course, I guess that you have not changed the focus at all. In my head, you would rather experience noise or artefacts coming in from an overheated sensor than an overall blur.

If you downsize the video to 2k, it shouldn't make much of a difference though.

I also haven't experienced such an issue yet, but as you wouldn't make a post without an issue, I would love to see a static 5 minute video. You would probably at some point of time experience a degradation if heat is the origin of that issue.

[axio]

17 minutes ago, BJohn said:

... you would rather experience noise or artefacts coming in from an overheated sensor than an overall blur.

This is a very good point. But other than heat, I couldn't image what could degrade the quality.

I was reluctant to put faces in, but here they are.

This is one face among many, I guarantee that this isn't motion blur.

Manual focus, manual shutter speed, aperture.

The only thing I left on auto was OIS and white balance

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

[BJohn]

You don't have to put faces on! Just record something static for 10 minutes which is pretty darn sharp in the beginning to detect issues and upload the video somewhere in the cloud. That helps to identify sensor issues. The second face looks suuuuper weird, I have to admit that and it doesn't look like motion blur! Still, single frames can look ugly in a video though. For a better problem identification, one would need to see an example video.

[BJohn]

I will try it out at the weekend but as of now, I hadn't recognised any issues with Q3 videos.

[nariza7]

19 hours ago, axio said:

That's also what'd like to find out.

The most immediate feeling is that the sensor overheats in 5 minutes already.

Yeah, ill definitely try to test it out too as the video side of the Q3 is important to me for quick family vids. I've been testing the 4k 60p side with digital crops too, and so far all the 4k 60p digital focal lengths (including the 28mm one) seem to not have good quality. I know its most likely binned and all for 4k, but it looks worse than sony binned ones. I get a bunch of moire in 4k. The 8k though looked really good when I briefly used it. I haven't recorded anything over a minute though, so I definitely have to try that out and see if theres degradation. Really curious what you guys find out in the meantime

[Advertisement]

Hallo,

Look here: Leica Q

[axio]

23 hours ago, BJohn said:

I will try it out at the weekend but as of now, I hadn't recognised any issues with Q3 videos.

19 hours ago, nariza7 said:

Yeah, ill definitely try to test it out too as the video side of the Q3 is important to me for quick family vids. 

Thanks for testing it. That will tell me if this is a common phenomenon or if I have a lemon.

It is also good to know that I don't need to try 4k, which uses h.264 according to the menu.

I am curious if the ProRes option offers more consistency. Perhaps I shall really try it on a static video.