{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:B234Z4JQDBYMAB2LMTVJD7IWJM","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f4fcd24a3b182a9ca109e81f38d37acded7cb412f0ddd2d5fe0d27d7f6cf72cd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-06-30T18:11:21Z","title_canon_sha256":"1f2f1deaaa7cb1a574d8fdc87795051b9e8bc6dc8b2a00c9e21ac1f8a48ec7c2"},"schema_version":"1.0","source":{"id":"2507.00162","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.00162","created_at":"2026-07-05T11:29:38Z"},{"alias_kind":"arxiv_version","alias_value":"2507.00162v1","created_at":"2026-07-05T11:29:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.00162","created_at":"2026-07-05T11:29:38Z"},{"alias_kind":"pith_short_12","alias_value":"B234Z4JQDBYM","created_at":"2026-07-05T11:29:38Z"},{"alias_kind":"pith_short_16","alias_value":"B234Z4JQDBYMAB2L","created_at":"2026-07-05T11:29:38Z"},{"alias_kind":"pith_short_8","alias_value":"B234Z4JQ","created_at":"2026-07-05T11:29:38Z"}],"graph_snapshots":[{"event_id":"sha256:62275c3d8a845c92bb047256dca6c84489d36b7b772dbce8180d1eb6519fd642","target":"graph","created_at":"2026-07-05T11:29:38Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2507.00162/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recent advances in video generation models have enabled high-quality short video generation from text prompts. However, extending these models to longer videos remains a significant challenge, primarily due to degraded temporal consistency and visual fidelity. Our preliminary observations show that naively applying short-video generation models to longer sequences leads to noticeable quality degradation. Further analysis identifies a systematic trend where high-frequency components become increasingly distorted as video length grows, an issue we term high-frequency distortion. To address this,","authors_text":"Yi Yang, Yu Lu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-06-30T18:11:21Z","title":"FreeLong++: Training-Free Long Video Generation via Multi-band SpectralFusion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.00162","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:9478268f8454f920d7ae79e0c2c88acc34f360b62ef47ba504dab5d2d153c808","target":"record","created_at":"2026-07-05T11:29:38Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f4fcd24a3b182a9ca109e81f38d37acded7cb412f0ddd2d5fe0d27d7f6cf72cd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-06-30T18:11:21Z","title_canon_sha256":"1f2f1deaaa7cb1a574d8fdc87795051b9e8bc6dc8b2a00c9e21ac1f8a48ec7c2"},"schema_version":"1.0","source":{"id":"2507.00162","kind":"arxiv","version":1}},"canonical_sha256":"0eb7ccf1301870c0074b64ea91fd164b26f750a3964cbe4c21af335b785c7ac3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0eb7ccf1301870c0074b64ea91fd164b26f750a3964cbe4c21af335b785c7ac3","first_computed_at":"2026-07-05T11:29:38.343395Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:29:38.343395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WWnuZjQCQqFPQNOsMTXXAjcQ4Ppyxg/3GAEvcovw6Aad5FO5niBfygRVc2GhTWxJpCA6GwyxvfIN2NjXJ5M3Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:29:38.343959Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.00162","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9478268f8454f920d7ae79e0c2c88acc34f360b62ef47ba504dab5d2d153c808","sha256:62275c3d8a845c92bb047256dca6c84489d36b7b772dbce8180d1eb6519fd642"],"state_sha256":"bfdaead6a623cdc02cfe36182a05a71a9b2d7b96c2d579d1fd0ae56cfe0d6f27"}