[null,null,["最后更新时间 (UTC)：2025-07-25。"],[[["\u003cp\u003e\u003ccode\u003eMediaMetadata\u003c/code\u003e is a class used to describe common media information like title, artist, images, and more, within the Cast framework.\u003c/p\u003e\n"],["\u003cp\u003eIt can represent metadata for the entire media or for individual sections within a media file, like chapters or segments.\u003c/p\u003e\n"],["\u003cp\u003eYou can specify the type of metadata, poster image URL, section duration, start times, and queue item ID using its properties.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003emetadataType\u003c/code\u003e property is required and determines the kind of media being described (e.g., movie, TV show, music track).\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eMediaMetadata\u003c/code\u003e objects are used as part of \u003ccode\u003eMediaInformation\u003c/code\u003e or to define sections in container metadata.\u003c/p\u003e\n"]]],["The `MediaMetadata` class, part of the Cast framework, describes media and container sections. It's instantiated with a `MetadataType`. Key properties include `metadataType`, `posterUrl`, `queueItemId`, `sectionDuration`, `sectionStartAbsoluteTime` (for live media), `sectionStartTimeInContainer`, and `sectionStartTimeInMedia`. These properties define the type, loading image, related queue item, duration, and start times of media sections, including offsets within a container or the media file itself.\n"],null,["# Class: MediaMetadata\n\ncast.[framework](/cast/docs/reference/web_receiver/cast.framework).[messages](/cast/docs/reference/web_receiver/cast.framework.messages).MediaMetadata\n======================================================================================================================================================\n\nclass static\n\nCommon media metadata used as part of `MediaInformation` or to describe\na media section as part of the container metadata.\n\nConstructor\n-----------\n\n### MediaMetadata\n\nnew\nMediaMetadata(type)\n\n| #### Parameter ||\n|------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|\n| type | [cast.framework.messages.MetadataType](/cast/docs/reference/web_receiver/cast.framework.messages#.MetadataType) Type of metadata. Value must not be null. |\n\nProperties\n----------\n\n### metadataType\n\nnon-null [cast.framework.messages.MetadataType](/cast/docs/reference/web_receiver/cast.framework.messages#.MetadataType)\n\nThe type of metadata.\n\n### posterUrl\n\n(string or undefined)\n\nOptional image URL to be shown when video is loading.\n\n### queueItemId\n\n(number or undefined)\n\nThe queue item that include this media section.\nThis is only relevant if used in container sections, and if there are\nmultiple media items for the container.\n\n### sectionDuration\n\n(number or undefined)\n\nThe media section duration in seconds. This is only required if the\nmetadata describes a section of the media file that has a different\nduration value.\n\n### sectionStartAbsoluteTime\n\n(number or undefined)\n\nAlternative way to provide the section start time for live media.\nProvides the start time in UNIX Epoch time (seconds since the Unix\nepoch).\n\n### sectionStartTimeInContainer\n\n(number or undefined)\n\nThe media section start time offset within the container, in seconds.\nIf not provided, the framework assumes that it's the same as the offset\nwithin the media.\n\n### sectionStartTimeInMedia\n\n(number or undefined)\n\nThe media section start time within the media file, in seconds.\nThis can be negative if a section started in previous file."]]
