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The fine-tuning process is not necessary on all shots. The automatic tracker produces excellent results, and does some supervision of its own. Fine-tuning may produce results that are indistinguishable from the original, or even a little worse! Shots with a slow camera motion may deserve special attention.
You can do a quick test by selecting and fine-tuning a single tracker, then comparing its track (using tracker trails) before and after fine-tuning using Undo and Redo. (See the online tutorial.) If the fine-tuning is beneficial, then fine-tune the remaining trackers.
After fine-tuning, be sure to check the tracker graphs in the graph editor and look for isolated spikes. Occasional spikes are typical when a tracker is in a region with a lot of repeating fine detail, such as a picket fence.
Keep in mind that though fine-tuning can help give you a very smooth track, often there are other factors at play as well, especially film grain, compression artifacts, or interlacing.
Fine-Tuning the Trackers
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