CHAPTER 1
IMAGE CONTROL
âGood things come to those who wait, but only the things left by those that hustle.â
âAbraham Lincoln
âAlways be patient in filmmaking, but donât wait for [anything]. Waiting implies inaction and aspiring filmmakers should always be in action.â
âAnthony Q. Artis
VIDEO TECH SPECSâTHE NECESSARY EVILS
Intro: My Low Definition of High-Definition Video
In as much as I like to focus on content and story and stay out for the bottomless rabbit-hole of confusion that is the technical specs and terminology of video, it is necessary to give some basic explanations of certain video concepts and definitions in order to better understand certain camera and TV settings and specs.
Pixels
Pixels are all the little red, green, and blue microdots that make up the image on a TV or monitor screen. The more pixels there are, the sharper and clearer the picture will be, the better the quality of the image.
Resolution
Video resolution refers to the size of the image in pixels. In camera and TV specs resolution is listed as the number of horizontal pixels Ă vertical pixels. The most popularly used resolutions are 1920 Ă 1080 and 1280 Ă 720 for HD cameras. Standard definition (SD) cameras have a resolution of 720 Ă 480. When listing HD resolution, most manufacturers simply state the vertical pixels: 1080 or 720 followed by the type of scanning (interlaced or progressive) as in 1080i, 1080p, or 720p. (See next page.)
Pixels as seen magnified on a 720p HD plasma screen.
Pixels as seen magnified on an old-school (circa 1976) 480i TV set.
Pixels are the colored dots that make up a picture on a screen. And resolution is the size of the screen in pixels.
Progressive vs. Interlace Scan Lines
Images are created on a screen by scanning vertically from top to bottom to refresh the picture a specified number of times per second, known as the refresh rate. The two flavors of video scanning are progressive (Yeahhhh!) and interlaced (Boooo!). Progressive scanning goes straight down the vertical rows of pixels to form a complete picture on each frame of video. Interlaced scanning skips every other vertical row of picturesâmaking one pass on the odd-numbered pixel rows (1, 3, 5, etc.), then a second pass on the even-numbered pixel rows (2, 4, 6, etc.) and alternating between these two half images known as video fields to form a single interlaced frame of video. The end result of interlacing is a less detailed and less smooth image than progressive video. This is most noticeable in text displayed on-screen and when pausing an interlaced picture, where funky jagged lines can often be seen in a freeze-framed image.
Refresh Rate
Lastly, we have monitor refresh rate, which refers to the number of times per second an image is scanned on a screen to form the picture. This number is measured in units called Hertz (Hz). So a TV with a 60Hz refresh rate scans the image on-screen 60 times per second to form the image we see. At the time Iâm writing this, common refresh rates in Europe are 50Hz and 100Hz, and in the U.S. refresh rates are 60Hz, 120HzâŚand most recently, refresh rates have gotten as high as 240Hz on the very baddest HDTV sets or monitors on the shelf. (Not bad meaning âbadâ, but bad meaning âgoodââŚMichael Jackson bad.) As technology improves, so will the maximum refresh rates, so by the time you read this, it could be even higher. Just like pixels, a higher refresh rate is a good thing to have on a TV.
Refresh rate scan lines from CRT (cathode ray tube) TVâs and monitors are often visible when shot with a still or video camera. Adjusting your cameras shutter speed a few settings up or down will usually solve the problem.
Frame Rate
Frame rate refers to how many frames of video you are shooting each second. Frame rates are usually shown in camera specs followed by a designation of âpâ for progressive or âiâ for interlaced scanning as explained above. So typical frame rate specs are expressed in terms such as 24p, 30p, and 60i. Video frame rate accounts for a good deal of the aesthetic look and feel of the video. For example, film is shot at 24 frames per second (fps), so video that is shot at the same 24 frames per second looks more cinematic and film-like. Video shot at the 30fps looks more âbroadcasty,â like the local news.
IMPORTANT MENU SETTINGS
Check Your MenuâŚFirst
The first thing that I advise you to do when you pick up any camera before a shootâis to thoroughly check the menu settings. I understand that this can be a tedious and boring exercise. However, impatient shooters should be aware that there are some crucial settings in any video camera menu that can make for some big headaches in postproduction and even during shooting if you are not familiar with what your camera is doing to your footage âunder the hood.â
One thing you become keenly aware of with experience is that as brilliant as the people who make cameras are, they are not filmmakers or cinematographersâthey are engineers. And as such, they occasionally make some nonsensical design decisions, so key features important to us are sometimes unintuitive, buried deep in a menu system or otherwise awkwardly arranged. Letâs take a look at some of the most crucial menu settings:
Video Format
This is the very first thing you should check, because choice of video format will have the greatest effect on the quality of your captured image. Prosumer cameras generally have a choice (often a wide choice) of format configurations that you can shoot in. The video format section of the menu is also where you will choose your frame rateâthe number of video frames recorded per second (abbreviated as âfpsâ).
This is where you will decide which type of HD footage youâre shooting: 1080 vertical lines of resolution Ă 1920 pixels of horizontal resolution or 720 vertical lines of resolution Ă 1280 pixels of horizontal resolution. (And just to add a layer of confusion, HDV format cameras shoot 1080 Ă 1440 pixels!)
The first thing you want to do is set your video format in the menu.
Common frame rates are 24fps, 25fps, 30fps, 50fps and 60fps. And just to go a little deeper down this rabbit-hole, this spec might also be followed by an âiâ for interlaced scanning or a âpâ to indicate progressive scanning.
Video format settings are typically listed in a menu as 1080p/24âwhich means youâd be shooting 1080 vertical lines Ă 1920 pixel progressive high-definition video at 24fps. (Some models may also list the exact same setting as 1080/24p, preferring to indicate progressive video after the frame rate.)
Shooting at 24fps will give you the most cinematic film-like video, since this is the same frame rate that film is shot at. Shooting at 30fps will give you a traditional broadcast video look.
Generally, itâs a good idea to shoot at the very highest quality video format your camera is capable of. The only time youâd switch this up usually is when you are going for a different look, such as a more video or film-like appearance.
Whether you understand all of this or not, the most important thing is that you check with two parties to make sure what you are giving them is compatible with their end needs and/or in-house systems: (1) your clients and (2) the editor. The clients will often be completely clueless, so you want to check with the people serving their technical needs on the other end such as a projectionist, editor, cable station, webmaster, etc. The bottom line is that anyone who will be handling the footage after you shoot it is someone you want to have a conversation with before you shoot. They will marvel at your foresight.
Timecode Menu Settings
Record Run
Record Run timecode is the setting you should use most of the time. This means that whenever you start recording, the camera is going to start running and recording timecode, and whenever you hit the record button to stop recording, the timecode is going to stop. When you start recording again, the camera will resume recording timecode at the very next frame.
Free Run
Free Run timecode, on the other hand, runs continuously like a clock, no matter when you start or stop the recording. So when you are in Free ...