VideoMD Extension Schema. VideoMD contains technical metadata that describe digital video. VideoSourceMD: VideoMD is used to describe the techical characteristics of a digital video object. VideoMD contains 8 elements: 1. color Information describing color characteristics and specifications; 2. compression The type and amount of digital compression e.g. Predictive - 10:1, RLE - 2:1; 3. data_rate The data rate of the video source item in Mb/s e.g. 4.0, 8.25, 100.0, etc; 4. duration Duration of video source item in time i.e. HH:MM:SSSS format; 5. frames The number of frames and frame rate of video source item; 6. resolution The horizontal and vertical dimensions in pixels and aspect ratio of the frame; 7. sound_field The digital sound format used in the video source item; mono, stereo, DTS, etc.... 8. video_format Information describing the format specifications of the video VideoMDType: Complex Type for encapsulating within a single parent element the individual video technical elements that describe a digital video object or portion thereof. The elements contained in VideoMD are also contained in VideoSourceMD although the values they contain may in some cases be different. The elements contained in VideoMD can be used independently of a video source element and directly under a METS mdSec.dmWrap element. The individual elements that comprise a video source element are documented under their corresponding types. VideoMDType has a single attribute, ID (XML ID). colorType: Complex Type for recording the color process used in an item or portion of an item. colorType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of color metadata contained in the element. - colorProcess: the type of color process used in video source item e.g. B/W, Technicolor, Coloration - colorEncoding: type of digital color encoding e.g. RGB, gray tone - colorQuantization: number of bits of color or gray tone depth e.g. 8-bit, 16-bit, 32-bit, etc... compressionType: Complex Type for recording the amount of digital compression used in an item or portion of an item. compressionType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of compression metadata contained in the element. - compressionMethod: method used to compress digital video e.g. Predictive, RunLengthEncoding, etc........ - compressionAmount: amount of compression applied e.g. 10:1, 2:1, etc........ data-_rateType: Complex Type for recording the data rate of an item or portion of an item. data_rateType has a single attribute, ID (XML ID). durationType: Complex Type for recording the duration of an item or portion of an item. durationType has a single attribute, ID (XML ID). frameType: Complex Type for recording the number and rate of frames of an item or portion of an item. frameType has 2 attributes, ID: (XML ID). FIELDTYPE: qualifier of the type of frame metadata contained in the element. - frameNumber: total number of frames in an item - frameRate: the number of frames per second of an item. resolutionType: Complex Type for recording the frame dimensions of an item or portion of an item in pixels. resolutionType has a 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of resolution metadata contained in the element. - pixelsHorizontal: the number of picture elements in a frame horizontally - pixelsVertical: the number of picture elements in a frame vertically - pixelsRatio: the ratio of horizontal to vertical resolution sound_fieldType: Complex Type for recording the aural space of the item or portion of an item. sound_fieldType has a single attribute, ID (XML ID). video_formatType: Complex Type for recording the video format of an item or portion of an item. video_formatType has 2 attributes, ID: (XML ID) FIELDTYPE: qualifier of the type of format metadata contained in the element. - formatEncoding: type of digital video encoding e.g MPEG-1, MPEG-2, QuickTime, D1, RealVideo, AVI, etc... - formatSignal: type of video signal e.g NTSC, PAL, SECAM. - formatSampling: type of sampling formats or profiles e.g. 4:2:0, 4:2:2, 4:4:4, etc.... - formatInterlacing: indicator of progressive or interlaced video i.e. Progressive, Interlaced