HEIF
The High Efficiency Image File Format (HEIF) is a container format for images and image sequences. It was published in 2015 by the Moving Picture Experts Group (MPEG) as part of the MPEG-H standard. Unlike other image formats such as JPEG or PNG, HEIF does not define the compression itself, but rather provides the container […]
Read MoreDNG
DNG stands for Digital Negative and is an open RAW format released by Adobe on September 27, 2004. I think the name (much like “RAW”) does a very good job of explaining what the files contain: the unaltered(*) raw data of the photograph—essentially a digital negative. Apple has also been using the format since the […]
Read MoreCR3
CR3 stands for Canon RAW 3 and is the latest RAW image format used in Canon digital cameras. It was introduced in 2018 with the Canon EOS M50 and replaced the older CR2 format. Like other RAW formats, CR3 files contain not only the unprocessed image data but also extensive metadata regarding exposure, white balance […]
Read MoreSVGZ
SVGZ is the compressed version of the SVG format. Technically speaking, it is a standard SVG file that has been compressed using gzip. As SVG files contain ‘mathematical descriptions’ of the content they represent, they lend themselves well to compression. Consequently, an SVGZ file is up to 80% smaller than its SVG counterpart. The compression […]
Read MoreOGX
OGX is a file extension for the OGG container, which was introduced by the Xiph.Org Foundation in 2008. Originally, only .ogg was used as the file extension for all content in the Ogg container, which eventually led to problems. Early hardware players and software expected .ogg files to contain only Vorbis audio (Ogg/Vorbis). Anyone who […]
Read MoreWhy Android 15 Downloads .ogg Files as .ogg.ogx – A MIME Type Analysis
TLDR: Many web servers, including Wikimedia and Wikia, send .OGG and .OPUS files with the outdated application/ogg content type. Android 15 has adjusted the logic of file extensions and now creates .ogg.OGX files in the download folder. The .ogx file extension is not commonly encountered. The solution is to correctly name the MimeTypes in the […]
Read MoreOTP
OTP, OpenDocument Presentation Template, is a template format for presentations in the OpenDocument standard (ODF). The format was released in 2005. When opening an OTP file (unlike ODP), the application opens a new, untitled presentation based on the template. The original file remains unchanged. OTP templates can include master slides, backgrounds, colour schemes, fonts, effects […]
Read MoreJXR
JXR stands for JPEG XR (JPEG eXtended Range) and is an image format developed by Microsoft under the name Windows Media Photo. It was presented at the WinHEC conference in May 2006, renamed HD Photo in November 2006, and finally adopted as an international standard (ISO/IEC 29199-2 and ITU-T T.832) under the name JPEG XR […]
Read MoreAMR
AMR stands for Adaptive Multi-Rate and is an audio format that was developed specifically for voice recordings. The codec was originally developed by the ETSI (European Telecommunications Standards Institute) for GSM mobile networks and adopted as the standard voice codec by 3GPP in 1999. AMR is narrowband and processes frequencies from 200 to 3400 Hz. […]
Read MoreDjVu
DjVu (pronounced Déjà-Vu) is an image compression format developed specifically for scanned documents. Unlike PDF, which is optimised for text and vector graphics, DJVU stores compressed pixel images. This is ideal for scans of books, magazines or historical documents. The biggest advantage is that, compared to PDF, the file size is particularly small. DjVu was […]
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