Image quality decreases in the rendered area

[reali]

Hi, I have a clip in my timeline. As soon as I apply an effect and the workspace is NOT pre-rendered, the image is sharp. As soon as I pre-render, the image quality decreases. Even if I actually render the video, it is still blurred. How can it be that it is not pre-rendered sharp and rendered blurred? Makes no sense to me...
This phenomenon does not occur with every video in my timeline. Only with one video and one photo.
I have already deleted the video render files and regenerated them.
I have already re-linked the video.
I have converted the raw material into other formats and re-linked it with Premiere.
It is still displayed pre-rendered blurred and not rendered sharp.

Need help. Thank you! 

[Ann Bens · Accepted solution]

Just to get on the same page:

Pre-render is in making preview files

Render as in Export?

Check your preview codec in the sequence settings.

Post screenshot Sequence and export settings

Clip properties of the offending video and photo.

Post Please post comp specs, Premiere version and build,

[edited]

[reali · Accepted solution]

Your first post helped.
I have changed the Preview File Format to the same size of my sequenz. And the format to QuickTime.
Now it's looks good! Thank you 🙂