A higher frame rate also increases the recording speed.ġ080p video shot at 60fps typically has a video bit rate of about 12Mbps. The bit rate is typically determined by the codec and compression method used to compress the images into a video file. 4K video with a bit rate of 400Mbps will take up much more space than 4K video at 60Mbps. When it comes to the size of a video file, the bit rate of the video encoding is one of the biggest factors. If you plan on shooting at 60 frames per second, you will need a larger card. When you shoot at 120 frames per second (fps), you are capturing 120 images compressed at different rates depending on the codec used.ĭigital cameras that shoot 4K video may offer frame rates of 24, 30, or 60 frames per second. Increasing the frame rate of the video increases the size of the file. In other words, resolution influences the size of the SD-card needed for recording video for a certain timespan at a certain image quality. This means you’ll need bigger SD-cards for 4K video compared to 2K, or 1080p. If you want to keep the same image quality (same codec/compression) and the same frame rate, you’ll also record four times the data at 4K compared to 1080p.
#Prores record time calc 1080p#
When you record 4K video, you are capturing 3840×2160-pixel images.ġ080p HD video captures 1920×1080-pixel images.Įach frame in a 4K video is four times the size of a 1080p video frame.
However, there are several factors that influence the bit rate, and thus the size of the SD-card you need in the end, which you also need to take into account:Īlong with the bit rate, the video’s resolution, frame rate, codec, and compression method also have something to say, and I’ll cover all of those here: Resolution I’ll get into bit rates in a minute, and further down, you’ll also find a table where you can see how much recording time you can expect for different bit rates at different size SD-cards. The main factor determining the size of the SD-card you need is your recording bit rate (how much data you record) and the length you want to record, i.e., the amount of data you need room for. If you want to read about SD-card speeds and the best SD-cards on the market today, instead, look at this article: What Is the Best SD Card for 4K Video? What Determines the Size of the Video File? Here is a closer look at how much space 4K video takes up on an SD card. However, there is a lot more to consider. With a 128GB card, you can store between 42 minutes and five hours of 4K video, which should be enough for most people. So what size SD card should you use for 4K video?ĭepending on the bit rate and codec, you may need at least a 128GB SD card to avoid switching out your card every hour. However, 4K video can also take up a considerable amount of space on a memory card. The latest digital cameras allow you to record stunning 4K video.
#Prores record time calc full#
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