G2VD: Generalizable AI-Generated Video Detection via Counterfactual Intervention and Causal Disentanglement

• URL: http://arxiv.org/abs/2607.04607v1
• Date: Mon, 06 Jul 2026 02:25:18 GMT
• Title: G2VD: Generalizable AI-Generated Video Detection via Counterfactual Intervention and Causal Disentanglement
• Abstract summary: Generalizable AI-Generated Video Detection framework based on counterfactual intervention and causal disentanglement.<n>G2VD shows strong average cross-domain performance and consistent gains over matched backbones.<n>This performance is obtained using only 10% of the original training data.
• Score: 9.616281293383684
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The rapid advancement of AI-generated videos poses increasing security risks and calls for robust detectors with strong cross-domain generalization. Although existing methods achieve promising results under in-domain evaluation, their performance often degrades substantially when tested on unseen generators. A key reason is shortcut learning, where detectors rely on domain-specific spurious cues, such as generator-dependent fingerprints and generation styles, instead of intrinsic forgery traces. To address this issue, we propose G2VD, a Generalizable AI-Generated Video Detection framework based on counterfactual intervention and causal disentanglement. First, G2VD introduces a counterfactual intervention pipeline (CFIPipeline) that generates controlled counterfactual samples via variational autoencoders (VAEs), followed by frequency-domain and pixel-domain alignment, thereby encouraging the detector to focus on generator-intrinsic cues. Building on this intervention process, we further design a causal disentanglement classifier consisting of two domain-anchored branches with distinct classification objectives, combined with an HSIC-based independence constraint to encourage the separation of task-relevant cues from domain-specific bias. Across four public datasets, G2VD shows strong average cross-domain performance and consistent gains over matched backbones. On the challenging GenVidBench cross-domain setting, it exceeds 90% accuracy and reaches an AUC close to 0.95. Notably, this performance is obtained using only 10% of the original training data. The code is available at https://github.com/dumeng98/G2VD.

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