Blackmagic Forum

When I add solid background I see gray lines at the borders of original image. How can I avoid that?

No idea?

give us more info, does not make much sense to me.

I place 255;255;255 solid white on the timeline. On top of that I place my video clip and using zoom make it smaller. That is to say I place my clip in the center of the solid layer. If my clip is pure white too at the borders I see those strange gray borders. It feels like anti-aliasing effect.

If you increase zoom at your any clip to its max value you will see the same gray lines at the borders of it.

Sergey Zinchenko wrote:I place 255;255;255 solid white on the timeline. On top of that I place my video clip and using zoom make it smaller. That is to say I place my clip in the center of the solid layer. If my clip is pure white too at the borders I see those strange gray borders. It feels like anti-aliasing effect.

If you increase zoom at your any clip to its max value you will see the same gray lines at the borders of it.

it looks like you're zoomed 1000%, if so, yes the outermost pixel can be interpolated hence gray.

But I see that blinking line even without zoom. Do you know any way to avoid that?

I tried almost everything. And still don't know what is the reason.

Image scaling preferences will fix this.
Bilinear removes the issue, as does Optimise for playback option when playing the video.
Read the manual to see how these options work.

I had the same problem, just check this option
clip atributes / alpha mode / premultipled