Rotating Blank Color Clip - Not Rendering Position Correctly

Dallan

v8.45

Part of my video involved creating a straight arrow, and I did this by using a "blank color clip" native to Videopad, and then I added a scale to make it longer and narrow. This would serve as the base of a pointing arrow. I applied the following Video Effects to the "blank color clip"

Scale (to make it narrow and longer)
Rotation (for direction of the arrow)
Position (to place it in the scene at the correct spot)

When I export the video I am finding the rendered blank clip has a noticeable horizontal offset from the position in the sequence preview. Here are two images to show this:

Sequence Preview: https://drive.google.com/file/d/1i8Izj0tKbrAM1yOQBhsEGPNPySBU7uv-/view?usp=sharing

Exported mp4 Screenshot: https://drive.google.com/file/d/1mX9-EJ742eNnSDLDMQaMy7iHLgjpWuZZ/view?usp=sharing

Upon further investigation I find that the rendered offset disappears if I remove the rotation effect, and the offset reappears if I re-apply the rotation effect. It seems that the rotation effect on a blank clip introduces an offset when exporting.

Is this a bug?

-0-0-

I did a second test using a .png arrow instead of the blank clip - scaling, rotating, and positioning as before - and I also find similar discrepancies from the preview to the exported:

The left side is the preview, and the right is the exported mp4 .

https://drive.google.com/file/d/1xWKiUm6qQU0H9R_QWgZZAKLjXOIbJU4T/view?usp=sharing

It seems that even the scaling may be off as well, as the arrow seems exported as vertically compressed

borate

First thing - upgrade to the latest. For licensed users upgrades are free for up to six months from purchase date. After that, VP will continue to fully function but a fee will be required in order to register the newest. Retain your old install file and registration info.

Even if unregistered, you can still test whether there is improvement. If not, report back.

Dallan

So I upgraded to 8.99 and found the same problem. Here is a screenshot: https://drive.google.com/file/d/1DvEMp7qvbgKy7PYbYzzSzR6IjIUX8rLN/view?usp=sharing

In VideoPad the clip and sequence preview both show the blank objects touching at the corner (top), but in the video player (shown on the bottom right) they are overlapping instead.

borate

Assuming that the discrepancy is seen in the export, have you tested other resolutions?

Share the project and someone will look it over. The process is easy, quick and can be done privately. Just follow these steps...

Back up --- With your project on the timeline, click on MENU at the top-left. Click FILE|BACK UP PROJECT FILES TO FOLDER. Choose a folder and SELECT FOLDER.
Upload --- Upload the saved, numbered FOLDER. Use a free server - Google Drive, MS OneDrive, etc.* Do NOT upload the individual VPJ or export file.
Get link --- Get a public link. If using Google Drive click GET SHAREABLE LINK. Change "restricted" to "anyone with the link can view" Click COPY LINK | DONE.
Share --- Paste that link here, or click the folder at the top-right of this forum to message it privately to me. It won't be shared.

* Before uploading, right-click the folder, click PROPERTIES. Look at the File Size to confirm that it's not too big for the free space on the server.

Dallan

I tried it at 1920x1080 and 854x480. Both have an offset.

https://drive.google.com/drive/folders/1LxV8m2bbxkyKdWB1Hor8Ja9GFfzu0b3f?usp=sharing

borate

Okay. No source files, so the VPJ was good. To my eye, both preview and export align the same.

Also created a similar test with export at 1080 and it too lined up.

The bar is a rotated crop of a blank image.

While editing use dual preview, to see what you're actually getting in the sequence screen. OPTIONS | GENERAL | Show dual previews.

Dallan

Hmm...that is strange. Without a rotation effect the export and preview line up. But once I include a rotation effect the export is offset from the video.

Is the first screenshot my original file? Because on my computer the preview has the two rectangles just touching, and then the export introduces a noticeable overlap. But in yours the preview is already overlapping, matching the export I get even though the preview has them just touching.

borate

Yes, the example above was made from https://drive.google.com/drive/folders/1LxV8m2bbxkyKdWB1Hor8Ja9GFfzu0b3f?usp=sharing

It looked exactly as above in version 8.99 PV using either MATCH MONITOR or MATCH PREVIEW settings.

Dallan

Ok. Setting the aspect ratio preview option to either of those fixes it. Thanks! With different aspect ratios the position of the rotated green blank moves around in the preview, creating an apparent offset in the export.