Tag Archives: movie editing

Science Video Tip: How to Deal with Lighting Issues

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Lighting is probably one of the biggest challenges for scientists making videos, especially while doing fieldwork.

Backlighting is a common mistake in which the subject is positioned in front of a window or other light source, putting their image in shadow. By moving the camera so that the light is behind the camera or to the side will solve this issue.  In the video below, I provide an example in which I wanted to shoot footage in a field station laboratory but the light from the windows was interfering with the shot.  Because of the configuration of the laboratory, it was not possible to shoot the lab bench in a way to put the light behind the camera.  I resolved the problem by blocking the light from the windows with some seat cushions and opening a door to introduce light from the side.

Outdoors, we have little control over light intensity and direction.  It’s difficult to avoid shadows during midday when the sun is overhead.   People often wear caps in the field, and these throw even more shadows on the person’s face.  One solution is to use a reflector.  You can buy one specifically for filming or you can use a folding car shade or even make your own with aluminum foil.  Then, you can use the reflector to light up your subject’s face with the sun overhead.  The limitation is that your subject must stay in one position, and you must also compose the shot so that the reflector is not visible.

Another solution to outdoor lighting and shadows is to shoot on an overcast day or when the sun is low on the horizon.  For me, an overcast day is the ideal shooting situation, which produces sharp images with little or no shadows.  Filming in the early morning or late afternoon is also good and can result in some beautiful, soft lighting and colors.  The latter may not always be possible, so the scientist videographer must be prepared to shoot under less than ideal lighting conditions.

Science Video Tip: Show and Tell

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Showing is almost always better than telling. I select aspects of a topic I’m talking about and then shoot footage or create a graphic to illustrate key points. When I interview other scientists, I try to think of ways to have them demonstrate something on camera. One tip is to always ask, “Can you show me what you mean?”, when doing an on-site interview (in a lab or at a field site). This question will often elicit some valuable footage for your movie project.

See this clip that resulted when I asked a scientist to show me what he meant by “relative buoyancy” of a floating marsh:

Science Videos and Riding the Wave

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I am not a professional filmmaker.  The methods I’ve been describing in this blog are those that have worked for me, a scientist. Some are standard among filmmakers and others are not. I present my ideas and experiences, not as rules to be followed, but as information that may help or inspire.  In fact, I would encourage you not to be constrained by anything you read here (or elsewhere) and to develop your own style.  That said, there are certain principles that must be understood and mastered.  I’ve mentioned a few of these on this blog and hope to describe more in coming posts.  It’s possible to break those rules and produce something really different and creative.  However, one must achieve mastery of those basic skills before thinking about breaking them. Otherwise, your videos will look amateurish and not attract viewers.

If you are a scientist or student of science who has not yet dipped your toe into the waters of videography, you are where I was five years ago. Since then, I’ve developed a few skills, mostly by trial and error.  We are accustomed to this approach in science.  We get some basic training in lab technique, technical writing, or oral presentations, for example, in graduate school, but only later are these skills honed and expanded….often during our first jobs.  I view videography as just another tool in my toolbox…but a tool that will become increasingly important in the future as science communication evolves.

The reaction I get most often from colleagues is why are you bothering to learn videography and spend (they mean waste) time creating videos?  I am reminded of the time when people asked me why I was bothering to learn PowerPoint and no longer using 35 mm slides and overhead transparencies.  They were really asking me why I was upsetting the status quo.  The older scientists in particular were comfortable with the old technology and simply did not want to change or bother with learning a new way of doing things.  Well, we know what happened.  Eventually, everyone was forced to learn the new way….or they got left behind.  The same is happening with science communication (and communication in general). Even if you are a student now and already familiar with what are new methods to older scientists, you will likely face similar dramatic changes at some point in your career.

It’s really a matter of whether you want to stay on the peak of the wave or let the wave pass you by.  Keeping up doesn’t take as much of an effort as most imagine.  And that’s what this blog is all about:  to show that riding the wave takes some effort initially to get up on the peak, but then requires only minor adjustments to stay abreast.  And like surfing, it can be a lot of fun learning how to ride the wave.

Strive for Brevity in your Science Videos

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When it comes to video, brevity is a virtue.  From shooting clips to the final product, we should strive to keep things brief.  When shooting, you want to keep your clips short, preferably under a minute or two in duration. Why? Because you are going to have to review all that footage you shot, perhaps hours of it, just to find a few minutes that you will use in the final product.  I don’t know about you, but I find that reviewing long clips can be torture.

It’s much easier to shoot multiple short clips that can be reviewed quickly; those that contain useful material can then be imported to your editing program and the rest can just be archived or deleted if absolutely useless.  During interviews, I will film each question and answer separately instead of shooting it as one long sequence.  This makes life much easier when I sit down to edit.  You can always splice these separate clips together later, even reordering them to tell a better story.

You also want to strive for brevity in your video segments, especially the talking heads segments.  The longer the talking head sequence, the greater the likelihood you will lose the viewer’s attention and interest.  I routinely intersperse a short clip of a person talking to the camera with footage accompanied by a narration or a montage of photographs.  Each segment moves the story forward, but is delivered by different people or other information sources. Here is an example:

In this sequence, I had a brief (32 seconds) clip of a person talking followed by a montage of still images, short video clips, graphics, and narration that moved the story forward. I repeated this type of sequence throughout the video, which can be seen in its entirety here.

Also, as I illustrated in the previous post, you can break up a long interview with other footage, graphics, or photographs so the viewer has something new to look at at frequent intervals.  This approach gives the illusion that something new is happening, when in fact the same person is speaking for several minutes.

Strangely enough, I figured this out on my own and very early in my video-making.  I only later learned that shooting short clips and keeping your video segments brief were methods that professionals recommended.

What Is “B-roll” and Why Should I Care About It?

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Put simply, B-roll is the extra footage you need to shoot to support or augment what your subjects (or you) are talking about in the “A-roll”.  The idea is that you will be shooting primary (A-roll) footage of interviews, a laboratory method, or a field site.  However, you will need additional material to illustrate aspects of this primary footage.  This is the B-roll.  For you digital generation folks, a “roll” refers to the old type of photographic film that was wound around a spool.  The term has an interesting history, which you can read about here.

I routinely shoot a variety of secondary footage when I go out to capture my primary footage. These include both video and still images as well as sound effects that might come in handy during editing.  I always try to get footage of traveling to and from a field site, for example, to use during the title sequence and the credit sequence at the end of the video. Sometimes these clips are shot from a car, a boat, or a plane, and I try to frame the shot so that there is space for the text that I will insert during editing. Here’s a clip that illustrates what I mean:

I shot that footage during the airboat ride to and from the field site where I did interviews and captured other primary footage. I used those clips for both title and end sequence, which worked out well, I think.  The entire video can be seen here.

I usually spend some time at the location of the shoot filming various closeups of plants and animals as well as landscapes, waves breaking on the shoreline, rain, vehicles moving past, people, buildings, shadows, or whatever characterizes the location.  I additionally shoot still images, especially closeups of flowers, insects, or other items that I can use in a montage of scenes.  Once I’ve completed the interview, then I walk around and shoot video or still images of whatever the interview subject has mentioned.  Then, I can insert those images during editing so that a long interview is not just of a talking head, but has interesting images or clips interspersed with the interview footage. Here is an example from the same video as above:

If you are doing a video of a laboratory method, you will want to get various shots of equipment from different angles as well as people going about their work.  You will probably work out a lot of these shots beforehand, but it’s always a good idea to shoot extra scenes and even things that are not central to the subject.  These types of footage may turn out to be useful during the introduction to the video or as a transition between interviews.

I also capture sound effects that might be useful for a montage of still images, for example: sounds of dripping water, waves breaking, birds or crickets chirping, a crackling fire, lions roaring (got this sound effect on a trip to Botswana).

During my work as a researcher, I got into the habit of setting aside time during a field trip to take photographs for later use in presentations and journal articles. I would first make a list of items that I needed a photo of, and then go out and search for them.  Sometimes, I would spend an entire day (during a long field trip) just shooting photos.  So it was second nature for me to apply the same practice to shooting video.

Get into the habit of taking your camcorder or camera with you and shoot whatever you are doing–in the lab or in the field.  Believe me, it will be worth the time and effort when you sit down to edit your video.