QuickTime Animation
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QuickTime Animation format (also known as QuickTime RLE) is a video compression algorithm and video codec created by Apple Computer to enable playback of RGB video in real time without expensive hardware.[1][2] It supports a lossless compression (if encoded at 100% quality) and color depths from 1 to 32 bits, and is one of the few video codecs that supports an alpha channel. QuickTime Animation uses run-length encoding for compression and as such, works well for traditional 2-D animation where there are large areas of constant color, or have little change of pixels frame to frame. For complex 3D rendered scenes or digitized film of real-world footage, it barely compresses at all and adds visible noise at lower than 100% quality levels. It is included in FFmpeg and is known as qtrle. Its fourCC is "rle ". (Please note the extra space character at the end.) It was declared the "winner" of a screencast codec shootout.[by whom?][3]
See also
References
- ^ "QuickTime File Format" (PDF). Inside QuickTime: The QuickTime Technical Reference Library. Apple Inc. 2000. Retrieved 5 April 2013.
- ^ Technical Description of the Apple QuickTime RLE codec
- ^ http://ayinat.blogspot.com/2007/08/screencast-on-linux-with-ffmpeg-and.html
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