- Add ``examples/offline_inference/lance/gradio_demo.py`` — a unified 7-task UI
(t2i / t2v / i2v / image_edit / video_edit / x2t_image / x2t_video) that
loads ``Lance_3B`` and ``Lance_3B_Video`` on two GPUs so image and video
tasks run concurrently. Surfaces official Lance examples per task; aspect
ratio is auto-snapped to one of upstream's 6 buckets from the input
image/video.
- Fix x2t_image / x2t_video output format: route x2t_image through a new
``_forward_x2t_image`` handler (was falling through to the img2img path
and emitting garbage), build the chat prefill in three segments
(prefix → ViT → suffix) so the ``<|im_end|>`` markers line up with
upstream's template, and start generation from a newline token instead of
``<|im_start|>`` so the assistant turn doesn't close itself with an
immediate EOS. Add a ``system_prompt`` override to ``render_lance_prompt``
so per-example QA instructions surface ("Look at the image carefully and
answer the question.") instead of the caption-style default.
- ``_forward_image_edit``: also stash the PIL image into ``custom_output``
so callers reading ``outputs[0].output`` *or* ``custom_output["image"]``
both work — the orchestrator IPC strips the bare ``output`` field across
process boundaries.
- ``pipeline_registry.py``, ``model_executor/models/lance/*``, registry
cleanup: remove the dead Lance-specific autoregressive shim
(``lance.py``) and its stage-input processor; the diffusion pipeline owns
the full flow now.
- Aspect-ratio buckets aligned with upstream's ``BucketResize`` (6 ratios:
21:9 / 16:9 / 4:3 / 1:1 / 3:4 / 9:16, sized for ``resolution_vae`` ∈
{480, 640, 768}). 3:2 / 2:3 dropped — upstream snaps those to 4:3 / 3:4.
- Gradio defaults match upstream's official scripts (cfg_text_scale=4.0,
validation_num_timesteps=30, validation_timestep_shift=3.5, seed=42); only
the demo *duration* is intentionally shorter than upstream's 121-frame
default to keep the UI snappy (user can extend to 10s via slider for
byte-identical reproduction).
Signed-off-by: lishunyang12 <lishunyang12@163.com>
Signed-off-by: WeiQing Chen <david6666666@users.noreply.github.com>
lishunyang12
7c934b6188