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banding when exporting files

robs
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13 Oct 2012 10:49 #14997 by robs

banding when exporting files was created by robs

Hi there, my footage looks fine in FCPX but when I export the files there is a lot of banding introduced on some of the clips (mainly where I have added subtle lighting or smoke particles in post)
The files are from the 5d mk ll 'HD 1080p' imported as optimised media and exported as current sequence settings, (with the ProRes option selected in preferences) Iv also tried compressor and various other settings but the banding is still there.
Is there anything I can do to help reduce the banding?

Thanks

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cgbier
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14 Oct 2012 10:59 #15032 by cgbier

Replied by cgbier on topic Re: banding when exporting files

Isn't the banding a feature of the 5d? I thought I had read something to this regard. Is it better if you transcode the footage to a 10 bit format before editing?

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robs
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14 Oct 2012 11:34 #15034 by robs

Replied by robs on topic Re: banding when exporting files

Iv shot quite a bit of footage with the 5d before and its been fine ( although they way I shot this particular project might not have helped) I still don't get why if there is no banding inside FCPX then why does the banding appear when you export it as current settings? there should be no compression of any sort should there?

I think your right though 10 bit would be better. Im thinking of upgrading the camera to the BMCC which shoots 10 and 12 bit...if it ever ships!

Thanks for your reply:)

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Lee Patterson
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14 Oct 2012 11:49 #15035 by Lee Patterson

Replied by Lee Patterson on topic Re: banding when exporting files

Hi can you upload a still frame to better see what you are describing? Thanks

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robs
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14 Oct 2012 12:18 #15036 by robs

Replied by robs on topic Re: banding when exporting files

Iv tried to find a shot where the banding is visible on a still, its probably more noticeable when theres movement. Basically where there is supposed to be subtle gradation there are noticeable bands.

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robs
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14 Oct 2012 12:22 - 14 Oct 2012 12:51 #15037 by robs

Replied by robs on topic Re: banding when exporting files

Not sure I added the file that last time heres another try;)
Screen Shot:chair 2012-10-14 at 13.05.24.png

Screen Shot:chair 2012-10-14 at 13.05.24.png

for some reason this is not happening? the file is there on my desk top but it says its not found?

Ah! at last sorry about that.

Attachments:

Last edit: 14 Oct 2012 12:51 by robs.

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Lee Patterson
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14 Oct 2012 18:38 #15049 by Lee Patterson

Replied by Lee Patterson on topic Re: banding when exporting files

contour artefacts (often resulting from 10 bit to 8bit conversion), a little bit of subtle film grain would help, I fight this a lot, it's very annoying

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robs
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14 Oct 2012 19:16 #15052 by robs

Replied by robs on topic Re: banding when exporting files

Will give the grain effect a try.

Thanks for your reply Lee

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Lee Patterson
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15 Oct 2012 10:08 #15074 by Lee Patterson

Replied by Lee Patterson on topic Re: banding when exporting files

This is a great question. Does anyone else have any comment/suggestion/workflow/insight. I would love to know. Thanks

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robs
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16 Oct 2012 09:35 #15121 by robs

Replied by robs on topic Re: banding when exporting files

In fcpx under the 'Stylise' effect the 'Add Noise' filter has a Blue Noise 'reduce banding' filter, its work well on some of the footage, still experimenting with it on the footage that seems to be more tricky. I hadn't noticed the Blue Noise filter before.

Adding this grain/noise is helping cheers Lee

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BenB
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16 Oct 2012 13:56 #15134 by BenB

Replied by BenB on topic Re: banding when exporting files

This has always been the bane of 8-bit NLEs.

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mgreynolds
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16 Oct 2012 14:06 - 16 Oct 2012 14:09 #15136 by mgreynolds

Replied by mgreynolds on topic Re: banding when exporting files

I heard someone say the other day that Adobe had "fixed" the banding problem with CS6 in After Effects. I never found much to back it up though. It does tend to work a little better for creating certain types of gradients. But yours is inherent in the footage itself. The grain idea works pretty well

Last edit: 16 Oct 2012 14:09 by mgreynolds.

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Lee Patterson
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16 Oct 2012 14:46 #15144 by Lee Patterson

Replied by Lee Patterson on topic Re: banding when exporting files

Found this, it gives a good overview
provideocoalition.com/index.php/ryoung/s...ng_in_after_effects/

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MaxKitaev
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15 Nov 2013 10:07 #34226 by MaxKitaev

Replied by MaxKitaev on topic Re: banding when exporting files

awesome man. adding noise really helps.

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Andreas Kiel
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15 Nov 2013 10:35 #34227 by Andreas Kiel

Replied by Andreas Kiel on topic Re: banding when exporting files

As Ben said earlier this is an issue since decades ago with 8 bit digital video.
Sony claimed to work with 10 bit and the DigiBetas. But that was only half the truth. After some copies the banding was visible as well.

You could try the "Film Grain" as well.

Andreas

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