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Apple ProRes
ProRes is a lossy video compression format developed by Apple Inc. for use in post production that supports up to 5K. It is the successor of the Apple Intermediate Codec and was introduced in 2007 with Final Cut Studio 2.〔(Final Cut Pro 6 - Broad Format Support. )〕
Only 4:4:4 RGB and YCbCr is lossless compression.
==Overview==
ProRes is a line of intermediate codecs, which means they are intended for use during video editing, and not for practical end-user viewing. The benefit of an intermediate codec is that it retains higher quality than end-user codecs while still requiring much less expensive disk systems compared to uncompressed video. It is comparable to Avid's DNxHD codec or CineForm which offer similar bitrates which are also intended to be used as intermediate codecs. ProRes 422 is a DCT-based intra-frame-only codec and is therefore simpler to decode than distribution-oriented formats like H.264.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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