Method and device for generating/receiving media file on basis of eos sample group, and method for transmitting media file

A media file receiving apparatus comprising a memory and at least one processor, wherein the at least one processor is configured to:

• obtain one or more tracks and a sample group from a media file;
• and
• reconstruct an access unit based on samples in the tracks and the sample group,
• wherein the sample group includes a first sample group including end of sequence (EOS) information of video data to which the access unit belongs, and
• wherein the first sample group includes one or more EOS NAL units and a first syntax element related to the number of EOS NAL units.

A media file generating method performed by a media file generating apparatus, comprising:

• encoding video data including an access unit;
• generating a first sample group including end of sequence (EOS) information of the encoded video data;
• and
• generating a media file based on the encoded video data and the first sample group,
• wherein the first sample group includes one or more EOS NAL units and a first syntax element related to the number of EOS NAL units.

A media file generating apparatus comprising a memory and at least one processor,

• wherein the at least one processor is configured to:
• encode video data including an access unit;
• generate a first sample group including end of sequence (EOS) information of the encoded video data;
• and
• generate a media file based on the encoded video data and the first sample group,
• wherein the first sample group includes one or more EOS NAL units and a first syntax element related to the number of EOS NAL units.