Sony K Rate
Kenneth
Would allowing adjustment mean that each videos gets rendered in its original framerate? Means, the resulting one video would change the framerate during playback? And in case, would this be an advantage or disadvantage?
I just wrote a nice detailed answer but somehow I deleted the draft. To save time, the simple explanation (EDIT: I haven't gotten this from experience; I'm just going off what people have told me in the past):
Checking the allow source to adjust frame rate button varies the frame rate in the rendered video for each source file. That means that if one of your source videos is 30fps and the next one 60, the frame rate will change when the next source video plays (from 30 to 60 in this example). I cannot think of a disadvantage of this, although re-editing the rendered video may be a bit weird (as shown in OSFirstTimer's YouTube video). Also shown in OSFirstTimer's video is that most phones record VFR videos but VEGAS Pro usually corrects that.
@Gyan in the comments says that this is not the case because "outputting a 30 or 60 fps project timeline consisting of a 30 and 60 fps media clip with 30 or 60 fps output frame rate all result in CFR output."
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Long story short is I've borrowed my buddy's nice Sony camera here that I've made a high speed film with and now that it's finished I need to confirm it's fps. I know virtually nothing about this camera so I had to find a youtube video to walk me through setting it up to do high speed, which thankfully went off without any hitches.
As far as I know I set the camera to film at 960 fps, but sometime when I was either copying the file over to my computer or importing it into my video editing program, a window popped up and said something pertaining to that if the file was NTSC it would be 960 fps and if PAL would be 1000 fps, or something close to that; and that's got me wondering. Memory is a little hazy and I probably rushed through that process too quickly. I'm in the states btw.
Yes, it's a legacy from Broadcast TV and linked to the mains power frequencies used in those different areas. 60Hz/60 fps in the states, and 50Hz/50 fps used in the UK and Europe. The idea was to prevent a rolling beat-frequency between the mains power and the TV frame rate.
It has some use today when filming/videoing under flickering mains-powered artificial light. All very well... except the flicker rate is at twice the mains frequency. So you might still get a 'hum bar' across the middle of the frame, but static and not rolling.
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VRR stands for Variable Refresh Rate. The TV refresh rate is how frequent the TV display updates the image you see on the screen. TV shows and movies are usually shown at a fixed refresh rate (e.g. 30 fps), so you have a consistently smooth experience. Games, on the other hand, aren't as consistent. Your gaming console sometimes has to work a bit harder: video games often incorporate dramatic scene changes, from sudden explosions to swift colour changes, which cause the frame rate to reduce drastically. VRR compensates for these changes by matching the refresh rate to the game's frame rate. This variability reduces lag and avoids screen tearing. In other words, VRR will create a smoother gaming image and experience.
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The two menus you'll need to bounce between are the System menu and the Camera menu, but first we need to visit the Recording menu. Here you'll go to the Rec Control setting and choose either SxS & AXS for XAVC and RAW recording, or just AXS.
Next we'll head to the System menu; here you'll choose either YPbPr or RAW as your Main Operation in the Base Setting submenu (High Frame Rate recording isn't available when using the RGB Base Setting). After that, you'll select your Imager Scan Mode. High Frame Rate recording works with any of the three choices here, but if you choose Normal, when entering the HFR mode, the camera will record your image as a 2K image, using either full scan (the entire sensor) or center scan (just the center 2048 x 1080).
The following flow chart should help you navigate the menu to get to the frame rate you need (it is also available as a pdf for download). If you're interested in learning even more about using the F55, make sure to check out our Sony F5 & F55 Intensive workshop.
First, decide on a resolution.
From MENU, select File Format and choose 4K (38402160) or HD (19201080). With four times higher resolution than HD, 4K offers impressive image quality, but because the amount of data is also four times higher, less time is available to record to memory cards, and computers will work harder to edit these files. As a beginner, consider recording your first movies in HD resolution, which is easier to work with but still offers good image quality.
Next, decide on a frame rate in Record Settings.
As the number of still images shown per second of video, the frame rate can be set to 24p, 30p, 60p, 120p, or other options (depending on the model) on the camera setting screen.
The higher the value, the more frames are shown in a given amount of time, so the smoother the display will be. Choose your preferred frame rate to suit how the movie should look.
120p is a good choice for creating smoother slow-motion video (with 24p being up to five times slower than normal speed) later when you edit the movies on a computer.
Once you've decided on a frame rate, set the shutter speed. As a guideline, choose a shutter speed that, expressed in seconds as a fraction, is 1 over a denominator equivalent to double the frame rate. For a frame rate of 30p, this would be a shutter speed of 1/60 second. Note that 60p and 24p would correspond to 1/120 second and 1/48 second, but because cameras don't offer these settings, choose the closest available shutter speed. When shooting indoors, also account for flickering light sources.
After setting the frame rate and shutter speed, set the aperture (f-number) and ISO sensitivity.
Although optimal aperture settings also vary by lens, many people prefer to blur the background by choosing a setting near maximum aperture. But because your movies will be too bright if you're recording outdoors in daylight, in those kinds of situations, consider using an ND filter to adjust the amount of light entering the camera.
As for ISO sensitivity, lower values will help you control image noise, which tends to occur at higher ISO sensitivities. You can also try AUTO for your first movie recording.
Subjects in your movies are affected by the various types and characteristics of light. White balance settings compensate for unwanted effects of light in the shooting environment to make white areas appear white. Beginners should start with auto white balance (AWB).
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