Method and apparatus for generating media file comprising 3-dimensional video content, and method and apparatus for replaying 3-dimensional video content

A device for transmitting three-dimensional video content, the device comprising:

• at least one processor configured to:
• generate a two-dimensional video frame in which three-dimensional video content containing point cloud data is compressed, and generate metadata necessary to reconstruct the three-dimensional video content from the two-dimensional video frame,
• encode the two-dimensional video frame, encapsulate the encoded two-dimensional video frame and the metadata into a media file, and
• packetize encapsulated data;
• and
• a communicator configured to transmit the packetized data,
• wherein the at least one processor is further configured to generate the media file by inserting a plurality of components contained in the encoded two-dimensional video frame into a plurality of samples included in a media data box in the media file, and inserting, into a metadata box in the media file, a plurality of first tracks each corresponding to a type of the plurality of components, and a second track corresponding to the metadata, and
• wherein the second track contains a list of the plurality of first tracks and a list of a plurality of versions of encoded each of the plurality of components and provides an entry point for each of the plurality of components inserted into the plurality of samples when the media file is parsed.

A method of receiving three-dimensional video content, the method comprising:

• reconstructing a media file by processing received packets;
• parsing the media file to extract an encoded two-dimensional video frame and metadata;
• decoding the encoded two-dimensional video frame;
• and
• reconstructing and outputting three-dimensional video content based on the two-dimensional video frame and the metadata,
• wherein the parsing of the media file includes:
• identifying a media data box and a metadata box contained in the media file,
• identifying, from the metadata box, a plurality of first tracks each corresponding to a type of a plurality of components contained in the encoded two-dimensional video frame, and a second track containing the metadata, and
• identifying, from the second track, a list of the plurality of first tracks, a list of a plurality of versions of encoded each of the plurality of components, and an entry point for each of the plurality of components in a plurality of samples in the media data box.