Approximate capacity calculated by bit rate
Bitrate is the amount of data used per second. Add the average bitrate of the video and sound, multiply by the length in seconds, and divide by 8 to get the approximate number of bytes. For example, if you record 60 seconds with video at 1.5 Mbps and sound at 128 kbps, the calculated value is approximately 12.21 MB. MB in this example is 1,000,000 bytes.
The actual file has container information appended to it and may not exactly follow the bitrate requested by the encoder. Therefore, the estimated screen capacity is a reference value and is not a function to accurately hit the target MB. Even if Include sound for silent input is turned on, the estimate will still include the amount of audio requested.
What changes if I lower a setting?
Lowering the bitrate usually reduces capacity, but may cause fast movement or small text to become blurry. Lowering the resolution reduces the number of pixels in a frame and the amount of detail that can be represented. Lowering the FPS may result in fewer frames per second, resulting in less smooth motion.
Choosing a high FPS does not create new movements that were not in the original. If you reprocess an already compressed video, it may become larger than the original and its quality may deteriorate. Leave the original and compare the text, movement, and capacity at the actual size you want to show. There is no single optimal setting or fixed compression rate that applies to all videos.
Frequently Asked Questions
Can I halve the file size?
Fixed rate is not guaranteed. Save the lower bitrate result and compare the actual number of bytes.
If I just lower the resolution, does it necessarily become smaller?
Request bitrate and encoder behavior also have an impact. Capacity reduction cannot be guaranteed simply by changing resolution.