Downscaling Video with FFmpeg and Nearest Neighbor

Downscaling MP4 Video Using Nearest Neighbor Algorithm with FFmpeg

Abstract: Learn how to downscale an MP4 video using the nearest neighbor algorithm with FFmpeg. This method preserves the original pixel values and reduces the file size.

Created: 2024-07-13 by UserComp.com Editors

Downscaling MP4 Video Using Nearest Neighbor Algorithm in FFmpeg

In this article, we will discuss how to downscale an MP4 video using the nearest neighbor algorithm in FFmpeg. This technique is often used when you want to reduce the resolution of a video while preserving the original pixelated look.

What is FFmpeg?

FFmpeg is a free and open-source software project consisting of a vast software suite of libraries and programs for handling video, audio, and other multimedia files and streams. It is widely used for format transcoding, stream encoding and decoding, metadata manipulation, and more.

What is the Nearest Neighbor Algorithm?

The nearest neighbor algorithm is a simple image resizing algorithm that copies the pixel value of the nearest neighbor to the destination. This algorithm is often used when downscaling images or videos because it preserves the original pixelated look and does not introduce any smoothing or interpolation.

Downscaling MP4 Video Using Nearest Neighbor Algorithm in FFmpeg

To downscale an MP4 video using the nearest neighbor algorithm in FFmpeg, you can use the following command:

ffmpeg -i input.mp4 -vf "scale=-2:720" -c:a copy output.mp4

In this command:

-i input.mp4 specifies the input file.
-vf "scale=-2:720" sets the video filter to scale the video to a height of 720 pixels. The width is calculated automatically to maintain the aspect ratio. The -2 means that FFmpeg will automatically calculate the width based on the input video's aspect ratio.
-c:a copy copies the audio stream from the input file to the output file without re-encoding.
output.mp4 specifies the output file.

You can adjust the height value to your desired output resolution. For example, if you want to downscale the video to 480p, you can use -vf "scale=-2:480" instead.

In this article, we have discussed how to downscale an MP4 video using the nearest neighbor algorithm in FFmpeg. This technique is useful when you want to reduce the resolution of a video while preserving the original pixelated look. The command to downscale an MP4 video using the nearest neighbor algorithm in FFmpeg is:

ffmpeg -i input.mp4 -vf "scale=-2:720" -c:a copy output.mp4

References

Tags: FFmpeg Video Editing Downscaling

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