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If the SD source file is not delivered matted or if there are no inactive pixels, Apple recommends setting all crop dimension attributes to '0' (zero).Ĥ:3 standard definition video should not be delivered anamorphic 16:9 with matting. See Music Video Single Crop Dimensions Metadata Example in the iTunes Package Music Specification for details. If the SD source is matted, the SD source should be delivered in its full-frame state with metadata included to specify the crop rectangle. Video source may be delivered matted: letterbox, pillarbox, or windowbox. Gamma values are accepted and the value must be between 2.15 and 2.25 Interlaced content must be tagged non-progressive and field ordering must be defined in the streamįield dominance must be properly tagged (top field first, bottom field first, or progressive)
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(ALAC or FLAC lossless compression is acceptable.)Ģ Height depends on aspect ratio of source with a maximum of 480 pixelsĪll encoded content must include pixel aspect ratio (pasp), preferably one that results in a display aspect ratio of 4:3 or 16:9.Ģ9.97 interlaced frames per second video source, delivered as either interlaced or de-interlaced properly tagged as progressiveĢ4, 25, or 30 frames per second sourced from film, delivered as progressiveĢ3.976 frames per second for inverse telecine, delivered as progressive must not be delivered interlaced or delivery will failįor mixed frame rate material, contact your iTunes Technical Representative Native resolution of project should be used - do not down-sample. The format of the masters must be 24-bit PCM at a sample rate of 44.1, 48, 88.2, 96, 176.4, or 192 kHz. Use these tools to set an appropriate level so that the encode doesn't show clipping.Īlthough Apple doesn't reject masters for specific numbers of clips, audible clipping caused by excessive levels to the encoder may be reason for tracks to not be badged and marketed as an “Apple Digital Master." (Up-sampling and/or bit-padding of 44.1 kHz/16-bit files is not allowed.)Īll masters must have been auditioned as encoded by the current Apple AAC encoder either with the “Apple Digital Masters Droplet", "RoundTripAAC" plug-in, or the Sonnox "Pro-Codec V2" plug-in that includes Apple's "iTunes +" AAC CODEC. Source format must have been minimum 24-bit with a minimum sample rate of 44.1 kHz. Apple recommends communicating these best practices to your mastering house: The following lists best practices for producing Apple Digital Masters content. Table 1: ProRes Audio Channel Data Assignment and Levelsīest Practices for Apple Digital Masters Content.Film Audio/Video and Alt-Audio Container.Music Video Screen Capture Image Profile.What’s New in the iTunes Video and Audio Asset Guide 5.3.8?.Select a topic from the table of contents or search help. ITunes Video and Audio Asset Guide 5.3.8 iTunes Video and Audio Asset Guide 5.3.8