Tech

What Is Video Compression?

Learn the differences between lossy and lossless video compression formats

Videos take up a lot of space. Recording uncompressed 1080 HD video requires approximately 10.5 GB per minute of video, but the frame rate may vary. If you’re using a smartphone to shoot your video, 1080p footage at standard 30fps capture takes 130MB of footage per minute, while 4K video takes up 375MB per minute of film.

Video compression is used to reduce file size because videos take up a lot of space and have limited bandwidth. Compression is the process of packing file information into a smaller space. It works with two different types of compression: lossy and lossless.

Lossy Compression Formats

Lossy compression means that the compressed file contains less data than the original file. Repetitive images and sound throughout the video can be removed to effectively remove parts of the video deemed unnecessary. In some cases, these turn into lower quality files as information is lost, hence the term “lossy”.

However, you may lose a relatively large amount of data before you begin to notice a difference (think MP3 audio files that use lossy compression). Lossy compression compensates for the loss of quality by producing relatively small files. For example, DVDs are compressed using the MPEG-2 format, which can make files 15 to 30 times smaller than the originals, but viewers still perceive DVDs to have high quality images.

Most video files downloaded from the Internet use lossy compression to reduce file size while still delivering a relatively high quality product. If a video remained (in some cases) a very high quality file size, not only would it take forever to load the content, but users with slow internet connections would have a very hard time streaming the video or downloading it from their own device. computers.

Although using a lossy compression format creates much smaller files, data is lost and cannot be restored.

Lossless compression formats

Lossless compression is exactly what it sounds like: the original and compressed versions are nearly identical. None of the data is lost during the compression process. Lossless compression formats are not as useful as lossy compression in most cases because files often shrink to the size they were before compression.

Considering that reducing file size is the primary goal of compression, using lossless video compression may seem unnecessary. However, if file size is not an issue, using lossless compression provides excellent image quality.

For example, a video editor who transfers files from one computer to another using an external hard drive may choose to use lossless compression to preserve quality while working. In this case, everything is fine because the external hard drive has enough free space to hold the huge video file.

However, someone looking to upload two hours of 4K video to a video streaming site probably won’t be using lossless compression. The file would be so large that it would take a long time to load.

Lossless compression formats include Free Lossless Audio Codec (FLAC), Apple Lossless Audio Codec (ALAC), and Windows Media Audio Lossless (WMAL).

If quality is important, not size, use a lossless compression format compatible with your intended use.


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What Is Video Compression?

Know the differences between lossy and lossless video compression formats

Videos take up a lot of space. Uncompressed 1080 HD video footage takes up about 10.5 GB of space per minute of video, but can vary with the frame rate. If you use a smartphone to shoot your video, 1080p footage at the standard 30 frames per second takes up 130 MB per minute of footage, while 4K video takes up 375 MB of space for each minute of film.

Because videos take up so much space, and because bandwidth is limited, video compression is used to reduce the size of the file. Compression involves packing the file’s information into a smaller space. This works through two different kinds of compression: lossy and lossless.

Lossy Compression Formats

Lossy compression means that the compressed file has less data in it than the original file. Images and sounds that repeat throughout the video might be removed to effectively cut out parts of the video that are seen as unneeded. In some cases, this translates to lower-quality files because information has been lost, hence the designation “lossy.”

However, you can lose a relatively large amount of data before you start to notice a difference (think MP3 audio files, which use lossy compression). Lossy compression makes up for the loss in quality by producing comparatively small files. For example, DVDs are compressed using the MPEG-2 format, which can make files 15 to 30 times smaller than the originals, but viewers still perceive DVDs as having high-quality pictures.

Most video files uploaded to the internet use lossy compression to keep the file size small while delivering a relatively high-quality product. If a video were to remain at its (in some cases) extremely high-quality file size, not only would it take forever to upload the content, but users with slow internet connections would have an awful time streaming the video or downloading it to their computers.

Although using a lossy compression format makes much smaller files, data is lost and cannot be restored.
Lossless Compression Formats

Lossless compression is exactly what it sounds like: the original and the compressed versions are nearly identical. None of the data is lost in the compression process. Lossless compression formats are not nearly as useful as lossy compression in many cases because files often end up being the same size as they were before compression.

Using lossless video compression might seem pointless, given that reducing the file size is the primary goal of compression. However, if the file size is not an issue, using lossless compression results in a perfect-quality picture.

For example, a video editor transferring files from one computer to another using an external hard drive might choose to use lossless compression to preserve quality while he’s working. In this case, since the external HDD has enough free space to hold the huge video file, it’s not a problem.

However, someone who wants to upload a two-hour-long, 4K video to a video streaming site probably wouldn’t use lossless compression. The file would be so large that it’d take a long time to upload.

Lossless compression formats include Free Lossless Audio Codec (FLAC), Apple Lossless Audio Codec (ALAC), and Windows Media Audio Lossless (WMAL), among others.

When quality is what matters, not size, use a lossless compression format that is compatible with your intended usage.

#Video #Compression

What Is Video Compression?

Know the differences between lossy and lossless video compression formats

Videos take up a lot of space. Uncompressed 1080 HD video footage takes up about 10.5 GB of space per minute of video, but can vary with the frame rate. If you use a smartphone to shoot your video, 1080p footage at the standard 30 frames per second takes up 130 MB per minute of footage, while 4K video takes up 375 MB of space for each minute of film.

Because videos take up so much space, and because bandwidth is limited, video compression is used to reduce the size of the file. Compression involves packing the file’s information into a smaller space. This works through two different kinds of compression: lossy and lossless.

Lossy Compression Formats

Lossy compression means that the compressed file has less data in it than the original file. Images and sounds that repeat throughout the video might be removed to effectively cut out parts of the video that are seen as unneeded. In some cases, this translates to lower-quality files because information has been lost, hence the designation “lossy.”

However, you can lose a relatively large amount of data before you start to notice a difference (think MP3 audio files, which use lossy compression). Lossy compression makes up for the loss in quality by producing comparatively small files. For example, DVDs are compressed using the MPEG-2 format, which can make files 15 to 30 times smaller than the originals, but viewers still perceive DVDs as having high-quality pictures.

Most video files uploaded to the internet use lossy compression to keep the file size small while delivering a relatively high-quality product. If a video were to remain at its (in some cases) extremely high-quality file size, not only would it take forever to upload the content, but users with slow internet connections would have an awful time streaming the video or downloading it to their computers.

Although using a lossy compression format makes much smaller files, data is lost and cannot be restored.
Lossless Compression Formats

Lossless compression is exactly what it sounds like: the original and the compressed versions are nearly identical. None of the data is lost in the compression process. Lossless compression formats are not nearly as useful as lossy compression in many cases because files often end up being the same size as they were before compression.

Using lossless video compression might seem pointless, given that reducing the file size is the primary goal of compression. However, if the file size is not an issue, using lossless compression results in a perfect-quality picture.

For example, a video editor transferring files from one computer to another using an external hard drive might choose to use lossless compression to preserve quality while he’s working. In this case, since the external HDD has enough free space to hold the huge video file, it’s not a problem.

However, someone who wants to upload a two-hour-long, 4K video to a video streaming site probably wouldn’t use lossless compression. The file would be so large that it’d take a long time to upload.

Lossless compression formats include Free Lossless Audio Codec (FLAC), Apple Lossless Audio Codec (ALAC), and Windows Media Audio Lossless (WMAL), among others.

When quality is what matters, not size, use a lossless compression format that is compatible with your intended usage.

#Video #Compression


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