Is Warp Stabilizer an 8-bit effect?

[Jonagrey]

I'd like to know if the following is true or false?

When you use an 8-bit effect (ie. warp stabilizer or any effect that doesn't have a 16/32-bit label) it will render 12/10-bit footage at 8-bit.

Furthermore, if I'm reading correctly, it renders the entire pipeline as 8-bit (not just the individual clip with the effects on it.

Adobe Link: https://helpx.adobe.com/au/premiere-pro/using/effects.html#gpu_accelerated_effects

- Warp stabilizer doesn't have a 32-bpc label on it, nor is it on the list of the link provided

- Does the 'render pipeline' mean the timeline?

Thanks and just wanting to know what the deal is or if I'm missing something!

[Sumeet Kumar Choubey · Accepted solution]

Hi Jonagrey,

I will try to answer your question to the best of my knowledge. As far as I know, 32/16/8-bpc processing is applicable to effects that modify or alter the color information of a pixel (like the Luminance or RGB values). Having a higher bpc allows to process that effect at higher bit depth which only affects the processing of color information. Warp stabilizer works on tracking the pixels with enough contrast and then stabilizing the media using that tracking info. It doesn't change any color info of the pixels, so in this case, having a higher bit depth should not really matter.

In case you are applying multiple effects that process color info using different bits per channel, you may try applying 32-bpc effect on the clip and then nesting it. Then apply  8-bpc effect on the nested clip. I believe nesting should help in processing the effects with different bpc separately. Please note that I might need to get this processing detail verified with the engineering team, which I can once they are back from the summer shutdown. Hope this helps. I can get more details for you once the team is back next week.

Thanks,

Sumeet

.

[jnortheast]

It's been 3 years and Adobe still hasn't fixed Warp Stabiliser to work as a 10bit effect. Warp Stabiliser does nothing to the colour of footage, so why does it have to degrade footage to 8bit? This is a major issue when stabilsing footage in After Effects when grading in Davinci Resolve. Is this on the rader of the Adobe Team and planned to be fixed?

[R Neil Haugen]

Have you set the sequence previews and also made sure the export bit depth were both Max Bit Depth and 16bpc?

If so, your sequence ... with or without Warp ... gets full depth.

If not, no.

And Warp isn't handled differently from anything else.

Understand, the need to set both sequence preview files (even though you don't make any) and the Export settings to Max Depth/16bpc, is not clear, and something that Jarle Leirpoll first posted about a couple years ago.

This should not be an issue but is ... for all clips on the sequence.

[R Neil Haugen]

Sumeet is correct ... Warp and other effects that do not change the color/tonal data of the image do not have the 32-bit lego block because they don't need it ... they don't affect the color/tonal data in processing. It's irrelevant to the image processing.

You only need worry about 32-bit color lego block with color or tonal correction effects. Not all of which have that lego.

Neil

Neil

[Jonagrey]

Amazing explanations — thank you guys!

So in future I'll be sure to avoid applying color or tonal correction effects that don't have the 32-bit color lego block, pre-colorgrade. As this may effect color banding in the final output.

Great work both of you, thanks.