Pictures - pixelation

Could anyone advise me on what picture format should I use?
I've imported some jpeg pics into my project but when I drag them to my timeline the picture is not the same as the original one. It is actually a very bad copy of it. Any suggestions? Thanks.

What are the pixel dimensions of your jpeg images?
If they are smaller than the pixel dimensions of your video, than you will have to enlarge the jpeg to fill screen and you will lose quality from that enlargement.
If the are substantially larger than the pixel dimensions of your sequence, you are reducing the amount of pixels in the image by shrinking it to fit and, at the same time are applying the codec of the timeline to the image. This can cause both shimmering, a pixellated appearance, and stair stepping along diagonal lines within the image.
One way to make the image look better is to apply a slight blur to the image, say a Gaussian Blur of 1 or 2 pixels. This blurring will reduce the amount of data contained in the image, and will thereby reduce the amount of compression being applied.
Hope this helps.

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