Luckily, all of the above can be compiled into one figure that is readily available in all camera manuals — bit rate. Knowing that 1 GB is the equivalent of about MB, you can now easily see how long it will take for your memory card to fill. Dividing this by eight gives A GB memory card is the equivalent of about , MB. For reference, I have already performed some of these conversions for the most common bit rates below.
Now that you know how to use the bit rate to determine video file size, you can use the memory card calculator below to see how many minutes of video you can record on different sized SD cards at different bit rates.
Remember — you can look in your camera manual to see the bit rate it records at. To compare p vs 4K video file size, you can see some examples below of how much p video you can usually fit on a memory card.
When it comes to recording 4K video, you need an SD card that can support high transfer rates, or your video will get cut short when your camera buffer is full. My preferred card for recording 4K is the SanDisk Extreme Pro , as this is the best SD card currently on the market, with the highest transfer speeds. You can read more about it in this article. I've travelled to probably 30 countries over the last few years, taking photos and licensing them around the world, and creating lots of free photography learning resources.
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And it allows lots of flexibility in editing. How many videos per GB? You can fit between 1. Or videos with an average length of 45 seconds, depending on resolution. This is based on a video resolution of 2.
For more detail, check out this chart showing the effect of video resolution on storage capacity. While these will be true for other cameras and models, the calculations in this chart are based on my Hero8 Black.
For my methodology, see my explanation below the chart. To ensure that it was empty, I reformatted it. Then I set the video resolution and frame rate to each of the settings above. The available space noted by time remaining on the SD card is noted in the top left of the LCD screen. I then divided the time remaining by 64 the number of GB on my card to determine the number of minutes per GB of storage space. Please note that the video size is approximate.
As noted in the next section, there are lots of factors affecting the size of a specific video file. The purpose of this post is to give an overview and an approximate base. Of course, if you replicate my settings exactly, your file size and card capacity will also match. There are a number of factors that will affect the size of each video.
They include video bitrate, frame rate, video length, video container, and other files stored on the same card. Does video resolution affect file size? You might think that this would be a significant factor when comparing memory card capacity. But file size actually depends more on frame rate and bitrate.
For example, in my tests, both p fps and 4K 60fps both generated an identical file size MB. How many hours of p video can 32GB hold? How many GB is a 30 minute video? How many GB is a 1 hour video? How big is a 30 minute 4K video? What is the size of 1 minute 4K video? How many GB is a 45 minute video? How many GB is a 15 minute video? How many MB is a 1 hour video?
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