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88798242 - cogvideo example: Distribute VAE video encoding across processes in CogVideoX LoRA training (#13207)

cogvideo example: Distribute VAE video encoding across processes in CogVideoX LoRA training (#13207) * Distribute VAE video encoding across processes in CogVideoX LoRA training Signed-off-by: jiqing-feng <jiqing.feng@intel.com> * Apply style fixes --------- Signed-off-by: jiqing-feng <jiqing.feng@intel.com> Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>