Throughout this blog, I’ve written numerous tips about how to produce projects, notably indie features, with a successful outcome in mind. I’ve tried to educate on issues of budget and schedule. In these next two entries, I’d like to tackle 21 tips that will make your productions go more smoothly, finish on time, and not become a disaster during the post production phase. Although I’ve framed the discussion around indie features, the same tips apply to commercials, music videos, corporate presentations, and videos for the web.
Avoid white. Modern digital cameras handle white elements within a shot much better than in the past, but hitting a white shirt with a lot of light complicates your life when it comes to grading and directing the eye of the viewer. This is largely an issue of art direction and wardrobe. The best way to handle this is simply to replace whites with off-whites, bone or beige colors. The sitcom Barney Miller, which earned DP George Spiro Dibie recognition for getting artful looks out of his video cameras, is said to have had the white shirts washed in coffee to darken them a bit. The whiteness was brought back once the cameras were set up. The objective in all of this is to get the overall brightness into a range that is more controllable during color correction and to avoid clipping.
Expose to the right. When you look at a signal on a histogram, the brightest part is on the righthand side of the scale. By pushing your camera’s exposure towards a brighter, slightly over-exposed image (“to the right”), you’ll end up with a better looking image after grading (color correction). That’s because when you have to brighten an image by bringing up highlights or midtones, you are accentuating the sensor noise from the camera. If the image is already brighter and the correction is to lower the levels, then you end up with a cleaner final image. Since most modern digital cameras use some sort of log or hyper gamma encoding to record a flatter signal, which preserves latitude, opening up the exposure usually won’t run the risk of clipping the highlights. In the end, a look that stretches the shadow and mids to expose more detail to the eye gives you a more pleasing and informative image than one that places emphasis on the highlight portion.
Blue vs. green-screen. Productions almost ubiquitously use green paint, but that’s wrong. Each paint color has a different luminance value. Green is brighter and should be reserved for a composite where the talent should appear to be outside. Blue works best when the composited image is inside. Paint matters. The correct paint to use is still the proper version of Ultimatte blue or green paint, but many people try to cut corners on cost. I’ve even had producers go so far as to rig up a silk with a blue lighting wash and expect me to key it! When you light the subject, move them as far away from the wall as possible to avoid contamination of the color onto their hair and wardrobe. This also means, don’t have your talent stand on a green or blue floor, when you aren’t intending to see the floor or see them from their feet to their head.
Rim lighting. Images stand out best when your talent has some rim lighting to separate them from the background. Even in a dark environment, seek to create a lighting scheme that achieves this rimming effect around their head and shoulders.
Tonal art direction. The various “blockbuster” looks are popular – particularly the “orange and teal” look. This style pushes skin tones warm for a slight orange appearance, while many darker background elements pick up green/blue/teal/cyan casts. Although this can be accentuated in grading, it starts with proper art direction in the set design and costuming. Whatever tonal characteristic you want to achieve, start by looking at the art direction and controlling this from step one.
Rec. 709 vs. Log. Digital cameras have nearly all adopted some method of recording an image with a flat gamma profile that is intended to preserve latitude until final grading. This doesn’t mean you have to use this mode. If you have control over your exposure and lighting, there’s nothing wrong with recording Rec. 709 and nailing the final look in-camera. I highly recommend this for “talking head” interviews, especially ones shot on green or blue-screen.
Microphone direction/placement. Every budding recording engineer working in music and film production learns that proper mic placement is critical to good sound. Pay attention to where mics are positioned, relative to where the person is when they speak. For example, if you have two people in an interview situation wearing lavaliere mics on their lapels, the proper placement would be on each’s inner lapel – the side closer to the other person. That’s because each person will turn towards the other to address them as they speak and thus talk over that shoulder. Having the mic on this side means they are speaking into the mic. If it were on their outer lapel, they would be speaking away from the mic and thus the audio would tend to sound hollow. For the same reasons, when you use a boom or fish pole overhead mic, the operator needs to point the mic in the direction of the person talking. They will need to shift the mic’s direction as the conversation moves from one person to the next to follow the sound.
Multiple microphones/iso mics. When recording dialogue for a group of actors, it’s best to record their audio with individual microphones (lavs or overhead booms) and to record each mic on an isolated track. Cameras typically feature on-board recording of two to four audio channels, so if you have more mics than that, use an external multi-channel recorder. When external recording is used, be sure to still record a composite track to your camera for reference.
Microphone types. There are plenty of styles and types of microphones, but the important factors are size, tonal quality, range, and the axis of pick-up. Make sure you select the appropriate mic for the task. For example, if you are recording an actor with a deep bass voice using a lavaliere, you’d be best to use a type that gives you a full spectrum recording, rather than one that favors only the low end.
Sound sync. There are plenty of ways to sync sound to picture in double-system sound situations. Synchronizing by matched timecode is the most ideal, but even there, issues can arise. Assure that the camera’s and sound recorder’s timecode generators don’t drift during the day – or use a single, common, external timecode generator for both. It’s generally best to also include a clapboard and, when possible, also record reference audio to the camera. If you plan to sync by audio waveforms (PluralEyes, FCP X, Premiere Pro CC), then make sure the reference signal on the camera is of sufficient quality to make synchronization possible.
Record wild lines on set. When location audio is difficult to understand, ADR (automatic dialogue replacement, aka “looping”) is required. This happens because the location recording was not of high quality due to outside factors, like special effects, background noise, etc. Not all actors are good at ADR and it’s not uncommon to watch a scene with ADR dialogue and have it jump out at you as the viewer. Since ADR requires extra recording time with the actor, this drives up cost on small films. One workaround in some of these situations is for the production team to recapture the lines separately – immediately after the scene was shot – if the schedule permits. These lines would be recorded wild and may or may not be in sync. The intent is to get the right sonic environment and emotion while you are still there on site. Since these situations are often fast-paced action scenes, sync might not have to be perfect. If close enough, the sound editors can edit the lines into place with an acceptable level of sync so that viewers won’t notice any issues. When it works, it saves ADR time down the road and sounds more realistic.
©2015 Oliver Peters