For example, if you rip an audio CD (lossless) to FLAC files (lossless), you'll end up with files as good as the original audio CD. Think of this like taking a photocopy of a photocopy-each time you photocopy a photocopy, you lose data and the quality becomes worse.Ĭonversion from lossless formats to lossless formats works well, however. If you take an MP3 file (a lossy format) and convert it to OGG (another lossy format), more of the data will be thrown away. This is also why it's a bad idea to convert lossy formats to other lossy formats. Think of it like taking a perfect copy of a photocopy. Even if it was possible to create a perfect copy of a photocopy, you would still end up with a photocopy, which isn't as good as the original document. You'd get a much larger FLAC file that's only as good as the MP3 file you converted from. If you converted the lossy MP3 file to a lossless FLAC file, you wouldn't get any of that data back. However, they are still significantly larger in size than MP3 files, which throw much data away. A FLAC file can contain the same lossless audio as a WAV file, but uses compression to keep create a smaller file. Formats like FLAC don't throw any data away - they keep all the data and compress it intelligently, like ZIP files do. For example, a WAV file typically contains uncompressed audio, and takes up quite a bit of space. Some of these lossless formats also provide compression. H.264 and H.265 can provide smaller files with higher qualities than previous generations of video codecs because it has a "smarter" algorithm that's better at choosing the data to throw out. Common formats like H.264 and H.265 are all lossy. Video: Few lossless video formats are in common consumer use, as they would result in video files taking up a huge amount of space.FLAC is a lossless audio format, while MP3 is a lossy audio format. Audio: WAV is a container file often used to contain lossless audio, although it is also capable of containing lossy audio.Images: RAW, BMP, and PNG are all lossless image formats.However, these aren't the only formats that are lossy and lossless. We call RAW a "lossless" format because it preserves all of the file's original data, while we call JPEG a "lossy" format because some data is lost when we convert an image to JPEG. RAW formats may be used by professional photographers to keep image quality high during the editing process, but they're not intended for the average person. A photo gallery with RAW images could take up hundreds of megabytes of space. If we're just uploading these files to a social network or placing them on a website, we don't want these image files to take up so much space. (This depends on the resolution of the image-a camera with more megapixels will produce a larger image.) If you save the image in RAW format, which keeps all the light data the camera's sensor received, the image may be as large as 25 MB. For example, when you take a photo, your camera captures all the light it can get and puts together an image. We use compression to make files smaller, allowing them to download faster and take up less storage space. Some types of media file formats are "lossy" and some types are " lossless." We'll explain what these terms mean, the advantages of each type of file format, and why you should never convert lossy formats to lossless ones.
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