Pacing
The most fundamental part of good editing is understanding pacing. Depending on what is happening in your scene, the pacing of the edits can change. If you are cutting a scene with a lot of action and movement, you’ll want the pacing to be quick. Once you’ve established that, you’ll normally stick with that pacing until the scene changes. To test this, cut a scene together, and then go back and watch it. Set an internal rhythm in your head and look for places where a shot goes too long or too short. Find ways to change the shot lengths that work with your narrative to create a good pace.
Jump Cuts
A jump cut is a cut where a portion of action gets chopped out and time “jumps” slightly ahead. They are generally edits you want to avoid in traditional video editing. Imagine you are watching a character driving a boat towards the shore. You cut to an alternate camera view and the character is sitting on the dock. We’ve lost the rest of the moments when the character docks and gets out. This is a jump cut, and it’s agitating to the viewer who is expecting a logical progression of time. To avoid jump cuts, try cutting on actions. If a character is reaching for a gun, cut to another angle of that same character reaching for the gun. If you don’t have enough footage to properly cover your shot, use a cutaway shot to fill the time needed to get from one action to another.
Flash Frames
Flash frames are a very common editing issue. They occur when you accidentally introduce a random frame into your edit. Maybe you have cut from one shot to another and then you replace the second shot but place it off by one frame, so the old second shot just flashes on for a brief moment, or maybe you introduce a frame of black by not perfectly aligning your edits in the timeline. With most video running at frame rates between 24 and 30 frames per second, we are only talking about a very brief glitch in the edit. Sometimes viewers and editors don’t even know what they are seeing. None the less, it makes the visuals feel like something is off.
Match Frames
Match frames are another common issue in editing that can be agitating to the viewer. This occurs when an editor cuts from one camera angle to another, but where the camera angles are very similar. Typically, when you make cuts, you want to change the angle dramatically enough that the viewer feels like they are getting a different point of view. Two shots back to back with similar composition and angle just give the sense that the earth has shifted slightly. Match frames can be avoided just like jump cuts by adding in a cutaway shot that will break up the two shots.
Ghost Frames
Ghost frames occur when you use a dissolve transition from one shot to another, but where the outgoing shot actually cuts to another shot before the dissolve is complete. What you end up with is a “ghosted” shot overlaid on the incoming footage. The simple solution is to make sure there is no other shot that can come up in between your transition. Trim the outgoing footage to where your shot ends, and make sure your transition completes by the time that shot finishes.