# issue tracking sequence

I am new to blender, I recently started to learn VFX.

I get an issue with tracking. I keep getting those 2 errors : - Failed to solve the motion: most likely there are no good keyframes  And

At least 8 common tracks on both keyframes are needed for reconstruction


I tried with many different video sequences, tried manually add tracker, detect trackers automatically, I even tried with one sequences that had tons of trackers but still the same error. Could you give me a hand?

Another image

This seems a lot of trackers but i tried it to see what was up, usually I only add like 20 trackers

## 2 Answers

I think I found the solution. See when I was adding a sequence, for some strange reason, it was not starting at frame 1, I mean I had to change the start frame to 250 and the frame offset to 1, so I think that messed things up, now I do not have that frame problem so all the track works well

Try to cleanup your tracks with different error threshold from high to low. You have too many unnecessary tracking points. You need at least 8 good trackers, but having way too many might make the process less accurate. See: How can I get better results when doing camera motion tracking?

Then if Keyframe checked option won't work correctly, try to set the best key range!

• how do you do that? And for info, I even went as far as selecting 2 keyframes next to each other (frame 1 and frame 2) and still got that error, is it a blender 2.81 error? – Joaquim Antonio Kapel Nov 29 '19 at 1:14