Help - my videos keep getting a mosaic effect with no effect added

[joes27027238]

I have been having problems with my video.  When I begin editing them, the video is fine and the source footage is clean.  Then somehow, while I'm working on it, the video ends up with a mosaic effect somewhere in the video and not even at a place where I made a splice.  These mosaics are never where I joined to pieces together but it seems that is a different frame showing up over the new one.   I have attached a couple of screen shots to show what is happening.   Generally it is a 4-8 frame problem.  when you view the video itself, it looks like it's a buffering problem but it is actually within the video itself.  I also put 2 clips together and uploaded it to youtube so you can see it happen.  video problems - YouTube  This is really frustrating because the only way I can get rid of it is by importing the raw footage again and then spicing that part over the top.

[Averdahl]

I have seen this happen sometimes and most of the times i could get rid of it by first letting the footage conform inside Premiere Pro before even touching the footage. If that did not work i did close Premiere Pro and manually deleted the Media Cache and Media Cache Database. When done, export from Adobe Media Encoder by using the Add Premiere Pro Sequence under the File menu.

I could trick Premiere Pro sometimes by changing the extension of the source file to force the use of another Importer.

What version exact of Premiere Pro do you use? (Help > About Premiere Pro)

How to delete Media Cache/Database: FAQ: How to clean (delete or trash) media cache files?

[Jeff Bugbee]

Also, make sure Use Previews is UNCHECKED when you do your final export.