Strange compression behaviour

[jonalange.de]

I'm not 100% sure if the compression is actually the problem, but I have no clue what else it could be.

I have a 3D animation rendered in a .mov file with transparent background.

All I did in premiere was to add a colored background and trimmed the video.

I exported it with media encoder in multiple resolution with various bitrates.

Everything is the same, doesn't matter if I render 1080x1080 (sequence resolution) or something lower, no change if I step up from 5 MBit bitrate to the mask possible at 17.5 MBit.

My selected format is H.264 because I need the video on a website.

Currently I have GPU rendering enabled.

Right at the moment when the coin passes the black lines it gets duplicated and half transparent. What can I do about this?

To make things clear, I don't see this in my original rendered footage nor in premiere.

[jonalange.de]

Ok great, you can't see it on youtube for some reason. Maybe because of their own compression.

[Ann Bens]

Post screenshot export settings with left tab to output with image.

[jonalange.de]

Here you are

[Ann Bens · Accepted solution]

Your sequence and export settings are interlaced (lower).

You need to set both to progressive.

[jonalange.de]

Where do I change that?

[jonalange.de]

Ahhh, found it now. Thank you very much! That solved the problem.

But is it recommended in gernal to use progressive? Or just in specific cases like this one?

[Ann Bens]

Interlaced is only for analog tv.

Nowadays, all is progressive.

[Michael Grenadier]

Ann is right (as usual) but if your source is interlaced, just setting your export to progressive will not give you the best quality...  

[Peru Bob]

Try turning off Hardware encoding in the Video tab of the export settings.

[jonalange.de]

That's already set to software because my Mac doesn't support it.

[Michael Grenadier]

try exporting to an intermediate format that's high quality all-iframe like prores 422 or 422 HQ and then try compressing to h64 from that if you don't see the issue in the intermediate format...

[jonalange.de]

I tried ProRes 422 HQ and still have that problem...

[Ann Bens]

You need to set the fields correct, Its an interlaced artifact.

Open your sequence settings and set it to custom (if its not already).