When evaluating digitization services, determine whether they use lossy compression and ask whether they offer choices of different codecs.ĭ specializes in at-scale video digitization. Unfortunately, many video conversion services are geared towards home users, and lossy compression is fairly standard. In most cases, you’re digitizing videos for preservation - and depending on the age of the tapes, you may have one opportunity to get the best possible reproduction of your sound and video. Related: Eliminate Combing In Digitized Betacam Video Choosing a Format for Video Digitization Re-converting the compressed file leads to more significant and noticeable artifacts. Whatever codec you choose, avoid converting the file to another codec/format. Some codec creators advertise their products as “virtually lossless.” While these compression codecs look indistinguishable from uncompressed video, they still lose some of the original signal - but the much lower file size may be worth the tradeoff. What about “virtually lossless” compression codecs? These codecs vary in the compression algorithms used, their support for different block sizes, and their licensing requirements. The most popular lossless video codecs include: You’ll need to look at the video’s codec, which compresses and decompresses the digital file. You cannot determine whether a video is lossy or lossless by looking at the file extension - the file format is simply a container. However, lossless compression does not reduce the file size nearly as much as lossy compression, so the user is still stuck with a fairly large file. Lossless compression restores and rebuilds the original video without losing any data or sacrificing quality in the process.It is more often noticed in a file that has experienced “data decay” due to repeated compressions and decompressions. That being said, it takes quite a bit of removed data for most people to notice a decrease in quality. Lossy compression reduces the file size by removing some of the original data.The redundant data is simply stored more efficiently, reducing the storage requirements without impacting the quality of the video. ![]() Lossy compression is appropriate when preparing videos for streaming, or in other situations where the quality of the video isn’t especially important.Īn alternative is lossless compression, which works by eliminating redundancy. In most cases, compression is “lossy”: It reduces the quality of the video - but depending on the format, the reduction in quality may not be noticeable. Compression solves this issue, but with a few drawbacks. Uncompressed video takes up an enormous amount of storage space, which may be impractical for larger archives. A 2-hour long, 8K resolution movie would take up about 14.5 terabytes (TB). The exact size of the file varies depending on the resolution of the film. Without compression, a single frame of typical video is around 5 megabytes (MB), which translates to around 150MB per second. Most video formats use compression, which reduces the data (and consumes less space on your storage media). When you’re digitizing a large number of videos, you’ll need to choose an appropriate format for the digital files.
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