Jagged lines in rendered footage

Yousef-Sheikh wrote on 8/26/2025, 5:54 PM

Hi - I really hope someone can help me here as this issue is driving me mad.

 

This involves old (but beloved) tech, I know.

I've long used GH2s in 24p mode to film live music and been very happy with the footage. On a recent project I shot in 25p to match the framerate of a different camera and am having a nightmare processing the footage.

Every which way I render it in my usual MAGIX AVC/ACC MP4 (25p, 24p 50i) I get horrendous jagged lines on horizontal movement. Interestingly, this doesn't appear to be an issue during editing/preview but is painfully obvious on rendering.

I suspect this may be due to the fact that the GH2 saves the 25p footage in a 50i wrapper and Vegas is struggling to recognize it for what it is. I can't seem to find a program that will let me change these attributes easily other than a Mac one called Clip Wrap 2 but I don't really use Macs and I'm also hesitant to spend money if it turns out this isn't actually the issue.

I asked on the old Personal View website which was once the gold standard for all things GH2 but I don't think there is much footfall there so several months on I haven't had an answer.

I'm using Vegas Pro 18 Build 527 on a Window 11 machine. The source footage is all 1920x1080 25p. The rendered footage looks equally bad on both of my monitors.

I've tried the above mentioned frame rates, I've tried right-clicking each clip on the timeline and making sure they are flagged as "field order: none" and I've also tried disabling resampling for every clip

Has anyone any bright ideas here? The footage in question is otherwise really enjoyable and I'd love to get it sorted.

Comments

RogerS wrote on 8/26/2025, 7:54 PM

Could you share a screenshot of your project and render settings? You do want to make the interlaced footage progressive and render to a progressive format.

EricLNZ wrote on 8/26/2025, 8:32 PM

I've tried right-clicking each clip on the timeline and making sure they are flagged as "field order: none"

Assuming you are seeing interlaced combing I would have expected that to fix the problem.

Anyway try going to your Project Media pane and there select all your GH2 25p clips. Right click on one and go to Properties/Field order and select None (progressive scan). That should change all the selected clips.

See if that makes any difference.

EDIT: Further thought after reading your post again - if you are seeing combing then your source must be real interlaced with different fields, and not progressive saved labelled as interlaced. Do you have a short clip you could upload to a cloud server, like Google Drive, for us to download and play with.

3POINT wrote on 8/26/2025, 9:40 PM

Or give us at least a Mediainfo of the GH2 clips.

EricLNZ wrote on 8/26/2025, 11:14 PM

Or give us at least a Mediainfo of the GH2 clips.

I suspect Mediainfo may be misleading if the GH2 does what my Canon AVCHD camera does. It "records" 25p as 50i. But the files are actually true 25p. Yousef said "the GH2 saves the 25p footage in a 50i wrapper" which is I suspect is the same. I forget the reason for this which is historical.

If the files are true 25p then irrespective of them being treated as progressive or interlaced shouldn't give combing as both fields are from the same time. So we await more info in order to determine what the problem is.