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AI Video Creator Tools: VRAM Estimator & Local Output Probe

Built from our dated RTX 5090 and multi-GPU benchmark records. Estimate peak memory before an OOM crash, plan 3-shot durations, or drop a local MP4 to verify whether a model silently changed your requested aspect ratio or duration.

Why does Video Reference OOM when Still Reference passes on 32GB?

In our H3 Ref2VA tests on a 32GB RTX 5090, encoding a multi-second motion reference alongside the text encoder and audio/video VAEs pushed peak memory to 31,658 MiB, whereas a 1-frame or 5-frame static reference stayed within ~29.15 GB.

Why did my 9:16 AI video come back as 480×640 (3:4)?

Several hosted image-to-video endpoints silently snap unsupported or quantized aspect ratios to 480×640 while returning HTTP 200. Use the local video probe below to audit delivered files before concatenating shots.

Does the Local Video Probe upload my video files?

No. The probe reads HTML5 video metadata and SHA-256 byte digests directly inside your browser via Web Crypto and Object URLs. Nothing leaves your device.

How do I plan a 15-second scene without hitting OOM?

Split the narrative into a 3-shot storyboard (establishing, escalation, reaction) rather than forcing a single long high-resolution generation.