Best way of rendering

I would ask how can I get the best output if I animates imported picture (png).

Screen from the Synfig Studio Editor:
Screen of an output (rendered to PNG):

Doesn’t matter output type. I just need the best quality output (in the best case as in first link). I have tried many formats of output but it’s not good yet.

I thank everyone for all the advice.

Rendering to a lossless format like png should give you excellent result.
Your second image is very small, what are your project dimensions?

I’ve solved it.
If I incremented resolution of project, exported format si much better. Thank you, rylleman.