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docs(streaming): note AV1 is LeRobot's default codec (vcodec=libsvtav1)

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So the A100/H100 no-AV1-NVDEC limitation applies to most LeRobot v3 datasets, not just
RoboCasa — GPU decode needs an Ada GPU, an hevc/h264-encoded dataset, or a re-encode.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Pepijn
2026-06-09 17:10:18 +02:00
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@@ -55,8 +55,9 @@ limited number of concurrent decode sessions per GPU; if you hit session/IPC lim
or compare against `--num_workers 0` (single-process NVDEC, which often saturates the decode engine on its
own). Result files include the decode device in their name (`..._w6_cuda.json`).
> **Codec ⇄ NVDEC compatibility (important).** NVDEC can only decode codecs its hardware supports. LeRobot
> v3 datasets are often **AV1**-encoded, and the **A100 and H100 compute GPUs have no AV1 NVDEC decoder**
> **Codec ⇄ NVDEC compatibility (important).** NVDEC can only decode codecs its hardware supports. LeRobot's
> **default video codec is AV1** (`VideoEncoderConfig.vcodec = "libsvtav1"`), so most v3 datasets are
> AV1-encoded — and the **A100 and H100 compute GPUs have no AV1 NVDEC decoder**
> (per NVIDIA's [decode support matrix](https://developer.nvidia.com/video-encode-and-decode-gpu-support-matrix-new));
> only Ada (L4/L40/RTX40) and a few Ampere cards (A10/A40/A16) do. On A100/H100, AV1 must be decoded on
> **CPU**, or the dataset re-encoded to H.265/H.264 (which those GPUs' NVDEC do support). Run