A computer device receives a signaling file corresponding to a multimedia resource. The signaling file includes descriptors corresponding to a plurality of track data of the multimedia resource, respectively. Dependency identifiers included in the descriptors correspond to the main bitstream track data pointing to descriptors corresponding to the library picture track data. The computer device parses the signaling file and determines a dependency relationship between the main bitstream track data and the library picture track data according to the dependency identifiers. The computer device sequentially acquires the library picture track data and the main bitstream track data from a data source side according to the dependency relationship.