The shape branch read axis 1, which held the frame count back when animatediff
returned (batch, channels, frames, height, width). Diffusers now returns
(batch, frames, channels, height, width) and the modular video path puts
channels last, so axis 1 reads channels or height and the line printed a
plausible wrong number: a 124 frame 1024x576 generation logged frames=576.
len() is the frame count under both layouts and is what the sibling call site
in process_decode already uses.
On ROCm, host-to-device DMA from mmap'd safetensors pages stalls ~1s per
copy, so weights move to the GPU at ~27 MB/s instead of ~28 GB/s. With
offload enabled this re-copies weights every forward, so generation
appears to hang.
Adds `diffusers_disable_mmap` (Settings > Model Loading), off by default,
which makes diffusers read shards into anonymous memory instead. Costs
peak RAM equal to the model size, so it is opt-in.
SD3.5-large on RX 9070 (gfx1201), same prompt and steps:
off: no image after 120s
on: image in 20s
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The loader applied balanced offload directly, which places nothing when the
offload mode is not balanced, leaving every component on cpu where the load
parked it. The dispatcher places them under whichever mode is configured, and
the vae seams pair the balanced call with an on-demand sweep so the vae returns
to cpu once its outputs are materialized.
The offload section interleaved shared and mode-specific options. The
page now reads top down: general options, an Offload Overrides section
holding the exclusions shared by balanced and group offload, then one
tuning section per mode. Use torch streams becomes Prefetch with streams
and Record torch streams becomes Overlap stream transfers, the section
headers carry hints, and the hints reflect live behavior, including
dropping the model-reload badge from options that apply on change.
Group offload ignored the offload exclusion settings and its options took
effect only at the next model load. Components named by the never-offload
list or the model-type exclusion now stay resident on the accelerator,
with matching shared between the balanced hook and the group roles. The
offload options re-place loaded components when changed: group modes
re-run the placement pass, and balanced mode rebuilds its hook, which
snapshots the exclusion lists at construction.
The force sweep enumerated pipeline components and moved every module to
cpu, including components with no hook to bring them back. It now moves
only modules stamped for on-demand placement, walks the pipe variants
through the shared enumeration instead of the components property that can
raise, keeps going past a component that fails to move, and collects
garbage once per sweep rather than per module.
Group offload placed components by name matching, which sent every modular
text encoder through a second apply with the denoiser profile and missed
vae-class components not named vae. Placement now derives from the component:
an encode or decode entry bridge and an upstream group-offload opt-out both
take whole-module on-demand placement, an undecorated encode or decode entry
stays resident with a warning, denoiser slot names take the per-step profile,
and everything else takes the leaf profile. One pass serves classic and
modular pipelines, enumerating modular components from their specs, with
hooks landing on text encoder wrappers rather than their inner models. A
signature sentinel marks a component mid-apply; a failed apply is torn down
on the next pass. The pass logs the placement of every component.
Implicit tokens are disabled process-wide, so the hijack that re-attaches the
token explicitly is what keeps gated repos reachable. It was installed by the
checkpoint loader and the caption paths, so loading a video model into a fresh
session sent unauthenticated requests and gated repos answered 401.
The stage 2 LoRA stores its connector deltas as
diffusion_model.{video,audio}_embeddings_connector, but
LTX2LoraLoaderMixin.lora_state_dict recognizes connectors only under the 2.3
text_embedding_projection prefix. All 3544 keys are routed into the transformer
namespace and peft drops the 224 that land nowhere, leaving refine with a
transformer-only adapter.
Wrapping lora_state_dict moves those keys onto the connectors component using
the rename table from the convert_ltx2_to_diffusers script. The wrapper is inert
once no misrouted keys appear, so it needs no version check.
2.5 reuses the LTX-2 pipeline classes, so it is described through the
capability table: Gemma 4 text encoder, cross-timestep conditioning, and the
upsampler and stage 2 LoRA that now ship inside the model repo. The repo
carries the distilled scheduler config, so Dev rows restore the terminal
shift, and the Dev transformer sits in transformer_full.
Distilled rows stop forcing dynamic shifting on, which remapped their sigma
schedule. Auto duration hands the clip length to the duration head.
The shared repo was written back onto the registry row, a module-level
singleton, so turning the setting off left the row pointing at the shared copy
for the rest of the session. It is chosen into locals instead.
Pipelines rarely report a sample rate, so the save path fell back to 24000.
LTX-2.3 and 2.5 run at 48k, and muxing at half the rate drops the track an
octave. The rate now comes from the vocoder, as the LTX tab already did.
The subfolder name doubles as the pipeline argument, so a repo shipping a
second transformer beside the default one had no way to load it: the argument
was dropped and the default weights stayed. dit_kwarg names the argument when
it differs from the folder.
The sampler shift override looked for flow_shift, which only UniPC-style
schedulers declare, so it never reached the flow-match schedulers 2.x uses.
Config keys are now restored only when the run wrote them, and a cached
upsampler is rebuilt once its repo or the model's VAE changes.
Some paths left both to pipeline defaults, which track the current upstream
model: distilled picked up guidance it already bakes in, and 2.0 could land on
2.3's joint-sigma path.
The modular branch returned the pipe instead of assigning it, so the video
tab and the API failed with "model not loaded" and the whole post-load tail
was skipped along with it.
The registry helpers filtered only the 'None' placeholder, so the eleven
LTX separator rows resolved as models and a POST naming one reached
load_model with a null repo. is_model() now covers both sentinel kinds.
DiffusionPipeline.download derives ignore_patterns from the passed components and
never reads the caller's, so the kwarg set in load_override was inert and diffusers
logged it as an unexpected keyword. The unsharded connectors duplicate it was meant
to skip was fetched on every LTX-2.3 mirror load.
Resolve the repo to a snapshot built from those patterns and hand from_pretrained
the folder instead of the id. That skips its download path, so the passed component
folders it would have pruned are pruned here instead. The connectors override drops
its own copy of the kwarg, which ModelMixin never read either.
CalamitousFelicitousness
Vladimir Mandic
Christopher McGee
Dity0