The FL2VA profile reads keyframe-anchor rows (build_packed_sequence anchors, noised
like inference); the coverage builder's --mode fl2va makes them from the v4 rows'
exact first/last frames re-encoded at the canvas size with the FL2VA Qwen3-VL
presentation; the keyframe-fidelity guard covers the FL2VA tasks.
Add MiniMaxH3FlexRef2VAModel / MiniMaxH3FlexFL2VAModel for OmniRefPDDQADMethod:
dense attention, Pika's shifted 1000..40 ladder, re-noise steps whose noise is a
function of (row seed, forward, modality), NVFP4 linears only. Add an offline
fp32 adapter merge script and QAD configs for both adapters. Let model profiles
pick their attention backend and receive the prepared row in schedulers().
Resolve the FP4 attention kernel and backend conflicts with main's #1980 versions
(re-adding install_fp4_vsa_attention), keep main's FP32 FSDP grouping, and keep both
save_inference and save_tagged in the checkpointer.
The runbook now gives the FASTVIDEO_ATTENTION_BACKEND=FLASH_ATTN
FASTVIDEO_FA4=1 launch prefix and the SDPA fallback, the tier override,
and measured GB200 timings and memory. The example selects the bucket
with --resolution/--aspect, the frame count with --duration, and
--offload resident|lazy.
Expose the exported H3 NVFP4 VAE decoder through ComponentConfig and map it to FastVideoArgs, alongside the existing text-encoder weight override. Add example flags and docs for the 36L quality and 8L fast decoder tiers, including the 8L depth-cut and no-NVFP4-VAE-encoder caveats. Add compat translation tests.
Remove the unsupported pipeline.preset selection from the example; the compatibility adapter rejects it before model loading. Load the last image as a PIL image because the request adapter does not do it for the stage. Document that the local Ref2VA path enforces reference counts and the 22-frame video floor, but not Pika's hosted per-clip/per-modality duration caps.
Add Pika H3 Flex (MiniMax-H3 plus the released fl2va/ref2va rank-128 adapters) as a FastVideo model family: registry/config/presets, bucket geometry with tiered reference sizing, automatic adapter selection and manifest validation, the fixed six-forward re-noise sampler, T2VA/I2VA/L2VA/FL2VA/Ref2VA pipeline support, an example, docs, and CPU unit tests.
GPU end-to-end validation is still pending. This change does not add PDD, VSA, or new kernel paths.
- V2 config now matches the canonical 16-GPU stage 1: warmup 10,
min LR ratio 0.3, HSDP 16.
- State that the published V2.1 checkpoint is linears-only (BF16 VSA
attention); the FP4 adaptation is a separate, non-public stage.
- Name the released checkpoints and starting models.
- Vendor and pin both calibrated amax tables.
- Add the V2 prompt/embedding and OmniRef eval data-prep scripts.
Add the OmniRef (Ref2VA, VSA tile 128) and V2/V2.1 Consumer (T2VA,
VSA tile 64) profiles of one quantization-aware distillation recipe:
NVFP4 W4A4 q/k/v/out and FFN linears in all 50 blocks, the FP4
sparse-attention emulator, frozen VSA gates and norms, output plus
layer-reconstruction regression against a frozen bf16 teacher, and
best-by-score checkpoints with audio eligibility guards.
Training code: the PDD-QAD method, the two H3 model plugins, the
NVFP4 emulated linear, and the tile-64/128 Triton emulator with its
PyTorch numeric reference. The VSA attention impl gains a fine
attention override hook and lets tile 128 run grad-capable forwards
through it. The trainer gains opt-in tagged checkpoints and early
stop hooks for the QAD guards.
Also add two runnable configs, the training guide, and CPU/GPU tests.
These speed-ups for the MiniMax-H3 pipelines keep the output bit-identical. Each
one has a switch that is off by default:
- FASTVIDEO_MINIMAX_H3_EXACT_KERNELS: Triton RoPE, AdaLN modulation, gated
residual and SwiGLU kernels that round to bf16 at the same points as the
eager ops.
- FASTVIDEO_H3_VSA_HEADS_FIRST_TILE: VSA-H3 tiles are written directly in the
heads-first layout of the kernel.
- FASTVIDEO_H3_VAE_TILE_PARALLEL: VAE spatial tiles are split across the
sequence-parallel ranks.
- FASTVIDEO_H3_REF2VA_MEMO_ENTRIES: repeat reference encodes are reused.
The example basic_fasth3_omniref_pdd.py --lossless-accel turns them all on.
On GB200 with 4 GPUs, MiniMax-H3 text to video with audio (124 frames,
1344x768) gives bit-identical frames and audio with the first three switches
on and off.
Adds opt-in regional torch.compile to the YAML-driven modular Wan trainer (training.model.enable_torch_compile / torch_compile_kwargs) with FA4 and Wan modulation forward/backward as opaque custom ops, compiled repeated DiT blocks after FSDP setup, and activation checkpointing applied before FSDP for trainable Wan transformers.
Merged with main's #1716 (WanModel resolves the checkpointing type in __init__; the PR's pre-FSDP wrap uses it and the post-load wrap is gone) and #1757 (pre_fsdp_model_transform runs before this PR's pre_fsdp_transform). Maintainer review (Swarm order #776): AdaLN skip names are canonicalized through checkpoint-wrapper prefixes, test_inference_regional_compile.py joins the unit lane, the Wan modulation custom-op test moved to the transformer lane, regional_compile is classified in the schema inventory, and a 1/2-GPU training smoke covers fully_shard(CheckpointWrapper) in eager and regional-compile modes. Validated on GB200: the FA4 CuTe forward/backward parity and fullgraph-backward tests and all four smoke cases pass.
Also exempts MMAudio recipes, whose student builds its pipeline config at init, from the fine-tuning recipe construction check that #1648 left failing on main.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Adds the Cosmos Predict 2.5 distilled text-to-world sampler (sCM, per-frame timesteps) and the DFD video-to-world pipeline, with their schedulers, registry entries, presets and examples.
Maintainer review fixes (Swarm orders #718 and #748): the DiT receives one shared fps value (its RoPE table is batch-independent, so per-sample vectors crashed batch > 1; differing values now raise), non-finite rollouts raise FloatingPointError instead of being zeroed by nan_to_num, the DFD detector matches "dfd" only in the last path component, the distilled example defaults to 24 fps, and the distilled rollout keeps its state in FP64 through the scheduler step as the official driver does.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Split the FastWan-QAD Wan2.1-1.3B examples into per-recipe scripts (fp8, nvfp4_qat, nvfp4_sa2) with a shared _qad_common.py and a standalone multi-run benchmark harness, replacing FastWan_QAD_TAEHV.py.
The PR's fastvideo-kernel build changes (sm_121a arch probe and build.sh mapping) were dropped during maintainer review (Swarm order #664) in favour of #1598, which owns the kernel arch policy; the RTX 5090 (sm_120a) recipes need nothing beyond main's kernels.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Registry: when several model detectors match a path, the first registered match still wins (main's pinned precedence, e.g. test_local_manifest_detectors_keep_first_match). Path specificity against each entry's registered HF paths now only decides whether to warn: the resolution is silent when the first match is strictly more specific than every other match (e.g. LTX-2.3 distilled directories that the LTX-2 base detector also claims through the shared pipeline class name), and warns otherwise, including when a later match is more specific than the one chosen. The PR originally re-ranked matches by specificity; that changed main's tested first-match resolution for local manifest directories, so it was narrowed during maintainer review (Swarm order #720).
Also fixes the QAD weights file path.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Aryan Kumar