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The APNG specification follows the PNG File format introducing three new ancillary chunks: [11] The animation control chunk (acTL) precedes the IDAT(s) of the default image and is a kind of "marker" that this is an animated PNG file. It also contains the number of frames and the number of times to loop the animation (0 meaning infinite).
In addition to pure container formats, which specify only the wrapper but not the coding, a number of file formats specify both a storage layer and the coding, as part of modular design and forward compatibility. Examples include the JPEG File Interchange Format (JFIF), for containing JPEG data, and Portable Network Graphics (PNG) formats.
When PNG development started in early 1995, developers decided not to incorporate support for animation, because the majority of the PNG developers felt that overloading a single file type with both still and animation features is a bad design, both for users (who have no simple way of determining to which class a given image file belongs) and ...
The registered MIME types are image/avci for still images and image/avcs for sequences. The format is simply known as AVCI. Apple products support playback of AVC-encoded .avci still image files and .avcs image sequence files [18] but will only generate .heic files.
By copying the selected image sequences without transcoding or re-rendering, it achieves very fast creation of the target file [10] in comparison to tools that re-encode frames. [11] Completely lossless copying is achieved when the source file is cut at the reference frames of a group of pictures only. This is being visualised when operating ...
The High Efficiency Image File Format (HEIF) is an image container format using the ISO base media file format as the basis. While HEIF can be used with any image compression format, it specifically includes support for HEVC intra-coded images and HEVC-coded image sequences, taking advantage of inter-picture prediction.
A PNG file contains a single image in an extensible structure of chunks, encoding the basic pixels and other information such as textual comments and integrity checks documented in RFC 2083. [7] PNG files have the ".png" file extension and the "image/png" MIME media type. [8]
Motion JPEG (M-JPEG or MJPEG) is a video compression format in which each video frame or interlaced field of a digital video sequence is compressed separately as a JPEG image. Originally developed for multimedia PC applications, Motion JPEG enjoys broad client support: most major web browsers and players provide native support, and plug-ins are ...
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