Failed to solve the motion

i have 20 tracks and it still gives me this error:
failed to solve the motion, most likely there are no good keyframes
cockroches.blend (3.7 MB)
here is the file of the blender project im trying to track.
if i unmark keyframes it gives me “atleast 8 common tracks on both keyframes are needed for reconstruction”

Hi Salsa,

Basically you’re getting the error:

"at least 8 common tracks on both keyframes are needed for reconstruction”

…because you need at least 8 active markers being tracked on each frame for Blender to be able to create a camera solve from it i.e. You have 23 tracks but you don’t have at least 8 of them active at the same time on each frame.

Just a note! If you find you need more help then you will probably need to provide the actual video footage.

ooh i didn’t know about the 8 active markers being tracked on each frame part, thanks for helping me out i’ll try to get more active trackers on the scene