Support SVD img2vid model.

comfy/cldm/cldm.py

@@ -54,6 +54,7 @@ class ControlNet(nn.Module):
         transformer_depth_output=None,
         device=None,
         operations=comfy.ops,
+        **kwargs,
     ):
         super().__init__()
         assert use_spatial_transformer == True, "use_spatial_transformer has to be true"

comfy/ldm/modules/attention.py

@@ -5,8 +5,10 @@ import torch.nn.functional as F
 from torch import nn, einsum
 from einops import rearrange, repeat
 from typing import Optional, Any
+from functools import partial
 
-from .diffusionmodules.util import checkpoint
+
+from .diffusionmodules.util import checkpoint, AlphaBlender, timestep_embedding
 from .sub_quadratic_attention import efficient_dot_product_attention
 
 from comfy import model_management
@@ -370,21 +372,45 @@ class CrossAttention(nn.Module):
 
 
 class BasicTransformerBlock(nn.Module):
-    def __init__(self, dim, n_heads, d_head, dropout=0., context_dim=None, gated_ff=True, checkpoint=True,
-                 disable_self_attn=False, dtype=None, device=None, operations=comfy.ops):
+    def __init__(self, dim, n_heads, d_head, dropout=0., context_dim=None, gated_ff=True, checkpoint=True, ff_in=False, inner_dim=None,
+                 disable_self_attn=False, disable_temporal_crossattention=False, switch_temporal_ca_to_sa=False, dtype=None, device=None, operations=comfy.ops):
         super().__init__()
+
+        self.ff_in = ff_in or inner_dim is not None
+        if inner_dim is None:
+            inner_dim = dim
+
+        self.is_res = inner_dim == dim
+
+        if self.ff_in:
+            self.norm_in = nn.LayerNorm(dim, dtype=dtype, device=device)
+            self.ff_in = FeedForward(dim, dim_out=inner_dim, dropout=dropout, glu=gated_ff, dtype=dtype, device=device, operations=operations)
+
         self.disable_self_attn = disable_self_attn
-        self.attn1 = CrossAttention(query_dim=dim, heads=n_heads, dim_head=d_head, dropout=dropout,
+        self.attn1 = CrossAttention(query_dim=inner_dim, heads=n_heads, dim_head=d_head, dropout=dropout,
                               context_dim=context_dim if self.disable_self_attn else None, dtype=dtype, device=device, operations=operations)  # is a self-attention if not self.disable_self_attn
-        self.ff = FeedForward(dim, dropout=dropout, glu=gated_ff, dtype=dtype, device=device, operations=operations)
-        self.attn2 = CrossAttention(query_dim=dim, context_dim=context_dim,
-                              heads=n_heads, dim_head=d_head, dropout=dropout, dtype=dtype, device=device, operations=operations)  # is self-attn if context is none
-        self.norm1 = nn.LayerNorm(dim, dtype=dtype, device=device)
-        self.norm2 = nn.LayerNorm(dim, dtype=dtype, device=device)
-        self.norm3 = nn.LayerNorm(dim, dtype=dtype, device=device)
+        self.ff = FeedForward(inner_dim, dim_out=dim, dropout=dropout, glu=gated_ff, dtype=dtype, device=device, operations=operations)
+
+        if disable_temporal_crossattention:
+            if switch_temporal_ca_to_sa:
+                raise ValueError
+            else:
+                self.attn2 = None
+        else:
+            context_dim_attn2 = None
+            if not switch_temporal_ca_to_sa:
+                context_dim_attn2 = context_dim
+
+            self.attn2 = CrossAttention(query_dim=inner_dim, context_dim=context_dim_attn2,
+                                heads=n_heads, dim_head=d_head, dropout=dropout, dtype=dtype, device=device, operations=operations)  # is self-attn if context is none
+            self.norm2 = nn.LayerNorm(inner_dim, dtype=dtype, device=device)
+
+        self.norm1 = nn.LayerNorm(inner_dim, dtype=dtype, device=device)
+        self.norm3 = nn.LayerNorm(inner_dim, dtype=dtype, device=device)
         self.checkpoint = checkpoint
         self.n_heads = n_heads
         self.d_head = d_head
+        self.switch_temporal_ca_to_sa = switch_temporal_ca_to_sa
 
     def forward(self, x, context=None, transformer_options={}):
         return checkpoint(self._forward, (x, context, transformer_options), self.parameters(), self.checkpoint)
@@ -418,6 +444,12 @@ class BasicTransformerBlock(nn.Module):
         else:
             transformer_patches_replace = {}
 
+        if self.ff_in:
+            x_skip = x
+            x = self.ff_in(self.norm_in(x))
+            if self.is_res:
+                x += x_skip
+
         n = self.norm1(x)
         if self.disable_self_attn:
             context_attn1 = context
@@ -465,31 +497,34 @@ class BasicTransformerBlock(nn.Module):
             for p in patch:
                 x = p(x, extra_options)
 
-        n = self.norm2(x)
-
-        context_attn2 = context
-        value_attn2 = None
-        if "attn2_patch" in transformer_patches:
-            patch = transformer_patches["attn2_patch"]
-            value_attn2 = context_attn2
-            for p in patch:
-                n, context_attn2, value_attn2 = p(n, context_attn2, value_attn2, extra_options)
-
-        attn2_replace_patch = transformer_patches_replace.get("attn2", {})
-        block_attn2 = transformer_block
-        if block_attn2 not in attn2_replace_patch:
-            block_attn2 = block
-
-        if block_attn2 in attn2_replace_patch:
-            if value_attn2 is None:
+        if self.attn2 is not None:
+            n = self.norm2(x)
+            if self.switch_temporal_ca_to_sa:
+                context_attn2 = n
+            else:
+                context_attn2 = context
+            value_attn2 = None
+            if "attn2_patch" in transformer_patches:
+                patch = transformer_patches["attn2_patch"]
                 value_attn2 = context_attn2
-            n = self.attn2.to_q(n)
-            context_attn2 = self.attn2.to_k(context_attn2)
-            value_attn2 = self.attn2.to_v(value_attn2)
-            n = attn2_replace_patch[block_attn2](n, context_attn2, value_attn2, extra_options)
-            n = self.attn2.to_out(n)
-        else:
-            n = self.attn2(n, context=context_attn2, value=value_attn2)
+                for p in patch:
+                    n, context_attn2, value_attn2 = p(n, context_attn2, value_attn2, extra_options)
+
+            attn2_replace_patch = transformer_patches_replace.get("attn2", {})
+            block_attn2 = transformer_block
+            if block_attn2 not in attn2_replace_patch:
+                block_attn2 = block
+
+            if block_attn2 in attn2_replace_patch:
+                if value_attn2 is None:
+                    value_attn2 = context_attn2
+                n = self.attn2.to_q(n)
+                context_attn2 = self.attn2.to_k(context_attn2)
+                value_attn2 = self.attn2.to_v(value_attn2)
+                n = attn2_replace_patch[block_attn2](n, context_attn2, value_attn2, extra_options)
+                n = self.attn2.to_out(n)
+            else:
+                n = self.attn2(n, context=context_attn2, value=value_attn2)
 
         if "attn2_output_patch" in transformer_patches:
             patch = transformer_patches["attn2_output_patch"]
@@ -497,7 +532,12 @@ class BasicTransformerBlock(nn.Module):
                 n = p(n, extra_options)
 
         x += n
-        x = self.ff(self.norm3(x)) + x
+        if self.is_res:
+            x_skip = x
+        x = self.ff(self.norm3(x))
+        if self.is_res:
+            x += x_skip
+
         return x
 
 
@@ -565,3 +605,164 @@ class SpatialTransformer(nn.Module):
             x = self.proj_out(x)
         return x + x_in
 
+
+class SpatialVideoTransformer(SpatialTransformer):
+    def __init__(
+        self,
+        in_channels,
+        n_heads,
+        d_head,
+        depth=1,
+        dropout=0.0,
+        use_linear=False,
+        context_dim=None,
+        use_spatial_context=False,
+        timesteps=None,
+        merge_strategy: str = "fixed",
+        merge_factor: float = 0.5,
+        time_context_dim=None,
+        ff_in=False,
+        checkpoint=False,
+        time_depth=1,
+        disable_self_attn=False,
+        disable_temporal_crossattention=False,
+        max_time_embed_period: int = 10000,
+        dtype=None, device=None, operations=comfy.ops
+    ):
+        super().__init__(
+            in_channels,
+            n_heads,
+            d_head,
+            depth=depth,
+            dropout=dropout,
+            use_checkpoint=checkpoint,
+            context_dim=context_dim,
+            use_linear=use_linear,
+            disable_self_attn=disable_self_attn,
+            dtype=dtype, device=device, operations=operations
+        )
+        self.time_depth = time_depth
+        self.depth = depth
+        self.max_time_embed_period = max_time_embed_period
+
+        time_mix_d_head = d_head
+        n_time_mix_heads = n_heads
+
+        time_mix_inner_dim = int(time_mix_d_head * n_time_mix_heads)
+
+        inner_dim = n_heads * d_head
+        if use_spatial_context:
+            time_context_dim = context_dim
+
+        self.time_stack = nn.ModuleList(
+            [
+                BasicTransformerBlock(
+                    inner_dim,
+                    n_time_mix_heads,
+                    time_mix_d_head,
+                    dropout=dropout,
+                    context_dim=time_context_dim,
+                    # timesteps=timesteps,
+                    checkpoint=checkpoint,
+                    ff_in=ff_in,
+                    inner_dim=time_mix_inner_dim,
+                    disable_self_attn=disable_self_attn,
+                    disable_temporal_crossattention=disable_temporal_crossattention,
+                    dtype=dtype, device=device, operations=operations
+                )
+                for _ in range(self.depth)
+            ]
+        )
+
+        assert len(self.time_stack) == len(self.transformer_blocks)
+
+        self.use_spatial_context = use_spatial_context
+        self.in_channels = in_channels
+
+        time_embed_dim = self.in_channels * 4
+        self.time_pos_embed = nn.Sequential(
+            operations.Linear(self.in_channels, time_embed_dim, dtype=dtype, device=device),
+            nn.SiLU(),
+            operations.Linear(time_embed_dim, self.in_channels, dtype=dtype, device=device),
+        )
+
+        self.time_mixer = AlphaBlender(
+            alpha=merge_factor, merge_strategy=merge_strategy
+        )
+
+    def forward(
+        self,
+        x: torch.Tensor,
+        context: Optional[torch.Tensor] = None,
+        time_context: Optional[torch.Tensor] = None,
+        timesteps: Optional[int] = None,
+        image_only_indicator: Optional[torch.Tensor] = None,
+        transformer_options={}
+    ) -> torch.Tensor:
+        _, _, h, w = x.shape
+        x_in = x
+        spatial_context = None
+        if exists(context):
+            spatial_context = context
+
+        if self.use_spatial_context:
+            assert (
+                context.ndim == 3
+            ), f"n dims of spatial context should be 3 but are {context.ndim}"
+
+            if time_context is None:
+                time_context = context
+            time_context_first_timestep = time_context[::timesteps]
+            time_context = repeat(
+                time_context_first_timestep, "b ... -> (b n) ...", n=h * w
+            )
+        elif time_context is not None and not self.use_spatial_context:
+            time_context = repeat(time_context, "b ... -> (b n) ...", n=h * w)
+            if time_context.ndim == 2:
+                time_context = rearrange(time_context, "b c -> b 1 c")
+
+        x = self.norm(x)
+        if not self.use_linear:
+            x = self.proj_in(x)
+        x = rearrange(x, "b c h w -> b (h w) c")
+        if self.use_linear:
+            x = self.proj_in(x)
+
+        num_frames = torch.arange(timesteps, device=x.device)
+        num_frames = repeat(num_frames, "t -> b t", b=x.shape[0] // timesteps)
+        num_frames = rearrange(num_frames, "b t -> (b t)")
+        t_emb = timestep_embedding(num_frames, self.in_channels, repeat_only=False, max_period=self.max_time_embed_period).to(x.dtype)
+        emb = self.time_pos_embed(t_emb)
+        emb = emb[:, None, :]
+
+        for it_, (block, mix_block) in enumerate(
+            zip(self.transformer_blocks, self.time_stack)
+        ):
+            transformer_options["block_index"] = it_
+            x = block(
+                x,
+                context=spatial_context,
+                transformer_options=transformer_options,
+            )
+
+            x_mix = x
+            x_mix = x_mix + emb
+
+            B, S, C = x_mix.shape
+            x_mix = rearrange(x_mix, "(b t) s c -> (b s) t c", t=timesteps)
+            x_mix = mix_block(x_mix, context=time_context) #TODO: transformer_options
+            x_mix = rearrange(
+                x_mix, "(b s) t c -> (b t) s c", s=S, b=B // timesteps, c=C, t=timesteps
+            )
+
+            x = self.time_mixer(x_spatial=x, x_temporal=x_mix, image_only_indicator=image_only_indicator)
+
+        if self.use_linear:
+            x = self.proj_out(x)
+        x = rearrange(x, "b (h w) c -> b c h w", h=h, w=w)
+        if not self.use_linear:
+            x = self.proj_out(x)
+        out = x + x_in
+        return out
+
+

comfy/ldm/modules/diffusionmodules/openaimodel.py

@@ -5,6 +5,8 @@ import numpy as np
 import torch as th
 import torch.nn as nn
 import torch.nn.functional as F
+from einops import rearrange
+from functools import partial
 
 from .util import (
     checkpoint,
@@ -12,8 +14,9 @@ from .util import (
     zero_module,
     normalization,
     timestep_embedding,
+    AlphaBlender,
 )
-from ..attention import SpatialTransformer
+from ..attention import SpatialTransformer, SpatialVideoTransformer, default
 from comfy.ldm.util import exists
 import comfy.ops
 
@@ -29,10 +32,15 @@ class TimestepBlock(nn.Module):
         """
 
 #This is needed because accelerate makes a copy of transformer_options which breaks "current_index"
-def forward_timestep_embed(ts, x, emb, context=None, transformer_options={}, output_shape=None):
+def forward_timestep_embed(ts, x, emb, context=None, transformer_options={}, output_shape=None, time_context=None, num_video_frames=None, image_only_indicator=None):
     for layer in ts:
-        if isinstance(layer, TimestepBlock):
+        if isinstance(layer, VideoResBlock):
+            x = layer(x, emb, num_video_frames, image_only_indicator)
+        elif isinstance(layer, TimestepBlock):
             x = layer(x, emb)
+        elif isinstance(layer, SpatialVideoTransformer):
+            x = layer(x, context, time_context, num_video_frames, image_only_indicator, transformer_options)
+            transformer_options["current_index"] += 1
         elif isinstance(layer, SpatialTransformer):
             x = layer(x, context, transformer_options)
             if "current_index" in transformer_options:
@@ -145,6 +153,9 @@ class ResBlock(TimestepBlock):
         use_checkpoint=False,
         up=False,
         down=False,
+        kernel_size=3,
+        exchange_temb_dims=False,
+        skip_t_emb=False,
         dtype=None,
         device=None,
         operations=comfy.ops
@@ -157,11 +168,17 @@ class ResBlock(TimestepBlock):
         self.use_conv = use_conv
         self.use_checkpoint = use_checkpoint
         self.use_scale_shift_norm = use_scale_shift_norm
+        self.exchange_temb_dims = exchange_temb_dims
+
+        if isinstance(kernel_size, list):
+            padding = [k // 2 for k in kernel_size]
+        else:
+            padding = kernel_size // 2
 
         self.in_layers = nn.Sequential(
             nn.GroupNorm(32, channels, dtype=dtype, device=device),
             nn.SiLU(),
-            operations.conv_nd(dims, channels, self.out_channels, 3, padding=1, dtype=dtype, device=device),
+            operations.conv_nd(dims, channels, self.out_channels, kernel_size, padding=padding, dtype=dtype, device=device),
         )
 
         self.updown = up or down
@@ -175,19 +192,24 @@ class ResBlock(TimestepBlock):
         else:
             self.h_upd = self.x_upd = nn.Identity()
 
-        self.emb_layers = nn.Sequential(
-            nn.SiLU(),
-            operations.Linear(
-                emb_channels,
-                2 * self.out_channels if use_scale_shift_norm else self.out_channels, dtype=dtype, device=device
-            ),
-        )
+        self.skip_t_emb = skip_t_emb
+        if self.skip_t_emb:
+            self.emb_layers = None
+            self.exchange_temb_dims = False
+        else:
+            self.emb_layers = nn.Sequential(
+                nn.SiLU(),
+                operations.Linear(
+                    emb_channels,
+                    2 * self.out_channels if use_scale_shift_norm else self.out_channels, dtype=dtype, device=device
+                ),
+            )
         self.out_layers = nn.Sequential(
             nn.GroupNorm(32, self.out_channels, dtype=dtype, device=device),
             nn.SiLU(),
             nn.Dropout(p=dropout),
             zero_module(
-                operations.conv_nd(dims, self.out_channels, self.out_channels, 3, padding=1, dtype=dtype, device=device)
+                operations.conv_nd(dims, self.out_channels, self.out_channels, kernel_size, padding=padding, dtype=dtype, device=device)
             ),
         )
 
@@ -195,7 +217,7 @@ class ResBlock(TimestepBlock):
             self.skip_connection = nn.Identity()
         elif use_conv:
             self.skip_connection = operations.conv_nd(
-                dims, channels, self.out_channels, 3, padding=1, dtype=dtype, device=device
+                dims, channels, self.out_channels, kernel_size, padding=padding, dtype=dtype, device=device
             )
         else:
             self.skip_connection = operations.conv_nd(dims, channels, self.out_channels, 1, dtype=dtype, device=device)
@@ -221,19 +243,110 @@ class ResBlock(TimestepBlock):
             h = in_conv(h)
         else:
             h = self.in_layers(x)
-        emb_out = self.emb_layers(emb).type(h.dtype)
-        while len(emb_out.shape) < len(h.shape):
-            emb_out = emb_out[..., None]
+
+        emb_out = None
+        if not self.skip_t_emb:
+            emb_out = self.emb_layers(emb).type(h.dtype)
+            while len(emb_out.shape) < len(h.shape):
+                emb_out = emb_out[..., None]
         if self.use_scale_shift_norm:
             out_norm, out_rest = self.out_layers[0], self.out_layers[1:]
-            scale, shift = th.chunk(emb_out, 2, dim=1)
-            h = out_norm(h) * (1 + scale) + shift
+            h = out_norm(h)
+            if emb_out is not None:
+                scale, shift = th.chunk(emb_out, 2, dim=1)
+                h *= (1 + scale)
+                h += shift
             h = out_rest(h)
         else:
-            h = h + emb_out
+            if emb_out is not None:
+                if self.exchange_temb_dims:
+                    emb_out = rearrange(emb_out, "b t c ... -> b c t ...")
+                h = h + emb_out
             h = self.out_layers(h)
         return self.skip_connection(x) + h
 
+
+class VideoResBlock(ResBlock):
+    def __init__(
+        self,
+        channels: int,
+        emb_channels: int,
+        dropout: float,
+        video_kernel_size=3,
+        merge_strategy: str = "fixed",
+        merge_factor: float = 0.5,
+        out_channels=None,
+        use_conv: bool = False,
+        use_scale_shift_norm: bool = False,
+        dims: int = 2,
+        use_checkpoint: bool = False,
+        up: bool = False,
+        down: bool = False,
+        dtype=None,
+        device=None,
+        operations=comfy.ops
+    ):
+        super().__init__(
+            channels,
+            emb_channels,
+            dropout,
+            out_channels=out_channels,
+            use_conv=use_conv,
+            use_scale_shift_norm=use_scale_shift_norm,
+            dims=dims,
+            use_checkpoint=use_checkpoint,
+            up=up,
+            down=down,
+            dtype=dtype,
+            device=device,
+            operations=operations
+        )
+
+        self.time_stack = ResBlock(
+            default(out_channels, channels),
+            emb_channels,
+            dropout=dropout,
+            dims=3,
+            out_channels=default(out_channels, channels),
+            use_scale_shift_norm=False,
+            use_conv=False,
+            up=False,
+            down=False,
+            kernel_size=video_kernel_size,
+            use_checkpoint=use_checkpoint,
+            exchange_temb_dims=True,
+            dtype=dtype,
+            device=device,
+            operations=operations
+        )
+        self.time_mixer = AlphaBlender(
+            alpha=merge_factor,
+            merge_strategy=merge_strategy,
+            rearrange_pattern="b t -> b 1 t 1 1",
+        )
+
+    def forward(
+        self,
+        x: th.Tensor,
+        emb: th.Tensor,
+        num_video_frames: int,
+        image_only_indicator = None,
+    ) -> th.Tensor:
+        x = super().forward(x, emb)
+
+        x_mix = rearrange(x, "(b t) c h w -> b c t h w", t=num_video_frames)
+        x = rearrange(x, "(b t) c h w -> b c t h w", t=num_video_frames)
+
+        x = self.time_stack(
+            x, rearrange(emb, "(b t) ... -> b t ...", t=num_video_frames)
+        )
+        x = self.time_mixer(
+            x_spatial=x_mix, x_temporal=x, image_only_indicator=image_only_indicator
+        )
+        x = rearrange(x, "b c t h w -> (b t) c h w")
+        return x
+
+
 class Timestep(nn.Module):
     def __init__(self, dim):
         super().__init__()
@@ -310,6 +423,16 @@ class UNetModel(nn.Module):
         adm_in_channels=None,
         transformer_depth_middle=None,
         transformer_depth_output=None,
+        use_temporal_resblock=False,
+        use_temporal_attention=False,
+        time_context_dim=None,
+        extra_ff_mix_layer=False,
+        use_spatial_context=False,
+        merge_strategy=None,
+        merge_factor=0.0,
+        video_kernel_size=None,
+        disable_temporal_crossattention=False,
+        max_ddpm_temb_period=10000,
         device=None,
         operations=comfy.ops,
     ):
@@ -364,8 +487,12 @@ class UNetModel(nn.Module):
         self.num_heads = num_heads
         self.num_head_channels = num_head_channels
         self.num_heads_upsample = num_heads_upsample
+        self.use_temporal_resblocks = use_temporal_resblock
         self.predict_codebook_ids = n_embed is not None
 
+        self.default_num_video_frames = None
+        self.default_image_only_indicator = None
+
         time_embed_dim = model_channels * 4
         self.time_embed = nn.Sequential(
             operations.Linear(model_channels, time_embed_dim, dtype=self.dtype, device=device),
@@ -402,13 +529,104 @@ class UNetModel(nn.Module):
         input_block_chans = [model_channels]
         ch = model_channels
         ds = 1
+
+        def get_attention_layer(
+            ch,
+            num_heads,
+            dim_head,
+            depth=1,
+            context_dim=None,
+            use_checkpoint=False,
+            disable_self_attn=False,
+        ):
+            if use_temporal_attention:
+                return SpatialVideoTransformer(
+                    ch,
+                    num_heads,
+                    dim_head,
+                    depth=depth,
+                    context_dim=context_dim,
+                    time_context_dim=time_context_dim,
+                    dropout=dropout,
+                    ff_in=extra_ff_mix_layer,
+                    use_spatial_context=use_spatial_context,
+                    merge_strategy=merge_strategy,
+                    merge_factor=merge_factor,
+                    checkpoint=use_checkpoint,
+                    use_linear=use_linear_in_transformer,
+                    disable_self_attn=disable_self_attn,
+                    disable_temporal_crossattention=disable_temporal_crossattention,
+                    max_time_embed_period=max_ddpm_temb_period,
+                    dtype=self.dtype, device=device, operations=operations
+                )
+            else:
+                return SpatialTransformer(
+                                ch, num_heads, dim_head, depth=depth, context_dim=context_dim,
+                                disable_self_attn=disable_self_attn, use_linear=use_linear_in_transformer,
+                                use_checkpoint=use_checkpoint, dtype=self.dtype, device=device, operations=operations
+                            )
+
+        def get_resblock(
+            merge_factor,
+            merge_strategy,
+            video_kernel_size,
+            ch,
+            time_embed_dim,
+            dropout,
+            out_channels,
+            dims,
+            use_checkpoint,
+            use_scale_shift_norm,
+            down=False,
+            up=False,
+            dtype=None,
+            device=None,
+            operations=comfy.ops
+        ):
+            if self.use_temporal_resblocks:
+                return VideoResBlock(
+                    merge_factor=merge_factor,
+                    merge_strategy=merge_strategy,
+                    video_kernel_size=video_kernel_size,
+                    channels=ch,
+                    emb_channels=time_embed_dim,
+                    dropout=dropout,
+                    out_channels=out_channels,
+                    dims=dims,
+                    use_checkpoint=use_checkpoint,
+                    use_scale_shift_norm=use_scale_shift_norm,
+                    down=down,
+                    up=up,
+                    dtype=dtype,
+                    device=device,
+                    operations=operations
+                )
+            else:
+                return ResBlock(
+                    channels=ch,
+                    emb_channels=time_embed_dim,
+                    dropout=dropout,
+                    out_channels=out_channels,
+                    use_checkpoint=use_checkpoint,
+                    dims=dims,
+                    use_scale_shift_norm=use_scale_shift_norm,
+                    down=down,
+                    up=up,
+                    dtype=dtype,
+                    device=device,
+                    operations=operations
+                )
+
         for level, mult in enumerate(channel_mult):
             for nr in range(self.num_res_blocks[level]):
                 layers = [
-                    ResBlock(
-                        ch,
-                        time_embed_dim,
-                        dropout,
+                    get_resblock(
+                        merge_factor=merge_factor,
+                        merge_strategy=merge_strategy,
+                        video_kernel_size=video_kernel_size,
+                        ch=ch,
+                        time_embed_dim=time_embed_dim,
+                        dropout=dropout,
                         out_channels=mult * model_channels,
                         dims=dims,
                         use_checkpoint=use_checkpoint,
@@ -435,11 +653,9 @@ class UNetModel(nn.Module):
                         disabled_sa = False
 
                     if not exists(num_attention_blocks) or nr < num_attention_blocks[level]:
-                        layers.append(SpatialTransformer(
+                        layers.append(get_attention_layer(
                                 ch, num_heads, dim_head, depth=num_transformers, context_dim=context_dim,
-                                disable_self_attn=disabled_sa, use_linear=use_linear_in_transformer,
-                                use_checkpoint=use_checkpoint, dtype=self.dtype, device=device, operations=operations
-                            )
+                                disable_self_attn=disabled_sa, use_checkpoint=use_checkpoint)
                         )
                 self.input_blocks.append(TimestepEmbedSequential(*layers))
                 self._feature_size += ch
@@ -448,10 +664,13 @@ class UNetModel(nn.Module):
                 out_ch = ch
                 self.input_blocks.append(
                     TimestepEmbedSequential(
-                        ResBlock(
-                            ch,
-                            time_embed_dim,
-                            dropout,
+                        get_resblock(
+                            merge_factor=merge_factor,
+                            merge_strategy=merge_strategy,
+                            video_kernel_size=video_kernel_size,
+                            ch=ch,
+                            time_embed_dim=time_embed_dim,
+                            dropout=dropout,
                             out_channels=out_ch,
                             dims=dims,
                             use_checkpoint=use_checkpoint,
@@ -481,10 +700,14 @@ class UNetModel(nn.Module):
             #num_heads = 1
             dim_head = ch // num_heads if use_spatial_transformer else num_head_channels
         mid_block = [
-            ResBlock(
-                ch,
-                time_embed_dim,
-                dropout,
+            get_resblock(
+                merge_factor=merge_factor,
+                merge_strategy=merge_strategy,
+                video_kernel_size=video_kernel_size,
+                ch=ch,
+                time_embed_dim=time_embed_dim,
+                dropout=dropout,
+                out_channels=None,
                 dims=dims,
                 use_checkpoint=use_checkpoint,
                 use_scale_shift_norm=use_scale_shift_norm,
@@ -493,15 +716,18 @@ class UNetModel(nn.Module):
                 operations=operations
             )]
         if transformer_depth_middle >= 0:
-            mid_block += [SpatialTransformer(  # always uses a self-attn
+            mid_block += [get_attention_layer(  # always uses a self-attn
                             ch, num_heads, dim_head, depth=transformer_depth_middle, context_dim=context_dim,
-                            disable_self_attn=disable_middle_self_attn, use_linear=use_linear_in_transformer,
-                            use_checkpoint=use_checkpoint, dtype=self.dtype, device=device, operations=operations
+                            disable_self_attn=disable_middle_self_attn, use_checkpoint=use_checkpoint
                         ),
-            ResBlock(
-                ch,
-                time_embed_dim,
-                dropout,
+            get_resblock(
+                merge_factor=merge_factor,
+                merge_strategy=merge_strategy,
+                video_kernel_size=video_kernel_size,
+                ch=ch,
+                time_embed_dim=time_embed_dim,
+                dropout=dropout,
+                out_channels=None,
                 dims=dims,
                 use_checkpoint=use_checkpoint,
                 use_scale_shift_norm=use_scale_shift_norm,
@@ -517,10 +743,13 @@ class UNetModel(nn.Module):
             for i in range(self.num_res_blocks[level] + 1):
                 ich = input_block_chans.pop()
                 layers = [
-                    ResBlock(
-                        ch + ich,
-                        time_embed_dim,
-                        dropout,
+                    get_resblock(
+                        merge_factor=merge_factor,
+                        merge_strategy=merge_strategy,
+                        video_kernel_size=video_kernel_size,
+                        ch=ch + ich,
+                        time_embed_dim=time_embed_dim,
+                        dropout=dropout,
                         out_channels=model_channels * mult,
                         dims=dims,
                         use_checkpoint=use_checkpoint,
@@ -548,19 +777,21 @@ class UNetModel(nn.Module):
 
                     if not exists(num_attention_blocks) or i < num_attention_blocks[level]:
                         layers.append(
-                            SpatialTransformer(
+                            get_attention_layer(
                                 ch, num_heads, dim_head, depth=num_transformers, context_dim=context_dim,
-                                disable_self_attn=disabled_sa, use_linear=use_linear_in_transformer,
-                                use_checkpoint=use_checkpoint, dtype=self.dtype, device=device, operations=operations
+                                disable_self_attn=disabled_sa, use_checkpoint=use_checkpoint
                             )
                         )
                 if level and i == self.num_res_blocks[level]:
                     out_ch = ch
                     layers.append(
-                        ResBlock(
-                            ch,
-                            time_embed_dim,
-                            dropout,
+                        get_resblock(
+                            merge_factor=merge_factor,
+                            merge_strategy=merge_strategy,
+                            video_kernel_size=video_kernel_size,
+                            ch=ch,
+                            time_embed_dim=time_embed_dim,
+                            dropout=dropout,
                             out_channels=out_ch,
                             dims=dims,
                             use_checkpoint=use_checkpoint,
@@ -602,6 +833,10 @@ class UNetModel(nn.Module):
         transformer_options["current_index"] = 0
         transformer_patches = transformer_options.get("patches", {})
 
+        num_video_frames = kwargs.get("num_video_frames", self.default_num_video_frames)
+        image_only_indicator = kwargs.get("image_only_indicator", self.default_image_only_indicator)
+        time_context = kwargs.get("time_context", None)
+
         assert (y is not None) == (
             self.num_classes is not None
         ), "must specify y if and only if the model is class-conditional"
@@ -616,7 +851,7 @@ class UNetModel(nn.Module):
         h = x.type(self.dtype)
         for id, module in enumerate(self.input_blocks):
             transformer_options["block"] = ("input", id)
-            h = forward_timestep_embed(module, h, emb, context, transformer_options)
+            h = forward_timestep_embed(module, h, emb, context, transformer_options, time_context=time_context, num_video_frames=num_video_frames, image_only_indicator=image_only_indicator)
             h = apply_control(h, control, 'input')
             if "input_block_patch" in transformer_patches:
                 patch = transformer_patches["input_block_patch"]
@@ -630,9 +865,10 @@ class UNetModel(nn.Module):
                     h = p(h, transformer_options)
 
         transformer_options["block"] = ("middle", 0)
-        h = forward_timestep_embed(self.middle_block, h, emb, context, transformer_options)
+        h = forward_timestep_embed(self.middle_block, h, emb, context, transformer_options, time_context=time_context, num_video_frames=num_video_frames, image_only_indicator=image_only_indicator)
         h = apply_control(h, control, 'middle')
 
+
         for id, module in enumerate(self.output_blocks):
             transformer_options["block"] = ("output", id)
             hsp = hs.pop()
@@ -649,7 +885,7 @@ class UNetModel(nn.Module):
                 output_shape = hs[-1].shape
             else:
                 output_shape = None
-            h = forward_timestep_embed(module, h, emb, context, transformer_options, output_shape)
+            h = forward_timestep_embed(module, h, emb, context, transformer_options, output_shape, time_context=time_context, num_video_frames=num_video_frames, image_only_indicator=image_only_indicator)
         h = h.type(x.dtype)
         if self.predict_codebook_ids:
             return self.id_predictor(h)

comfy/ldm/modules/diffusionmodules/util.py

@@ -13,11 +13,78 @@ import math
 import torch
 import torch.nn as nn
 import numpy as np
-from einops import repeat
+from einops import repeat, rearrange
 
 from comfy.ldm.util import instantiate_from_config
 import comfy.ops
 
+class AlphaBlender(nn.Module):
+    strategies = ["learned", "fixed", "learned_with_images"]
+
+    def __init__(
+        self,
+        alpha: float,
+        merge_strategy: str = "learned_with_images",
+        rearrange_pattern: str = "b t -> (b t) 1 1",
+    ):
+        super().__init__()
+        self.merge_strategy = merge_strategy
+        self.rearrange_pattern = rearrange_pattern
+
+        assert (
+            merge_strategy in self.strategies
+        ), f"merge_strategy needs to be in {self.strategies}"
+
+        if self.merge_strategy == "fixed":
+            self.register_buffer("mix_factor", torch.Tensor([alpha]))
+        elif (
+            self.merge_strategy == "learned"
+            or self.merge_strategy == "learned_with_images"
+        ):
+            self.register_parameter(
+                "mix_factor", torch.nn.Parameter(torch.Tensor([alpha]))
+            )
+        else:
+            raise ValueError(f"unknown merge strategy {self.merge_strategy}")
+
+    def get_alpha(self, image_only_indicator: torch.Tensor) -> torch.Tensor:
+        # skip_time_mix = rearrange(repeat(skip_time_mix, 'b -> (b t) () () ()', t=t), '(b t) 1 ... -> b 1 t ...', t=t)
+        if self.merge_strategy == "fixed":
+            # make shape compatible
+            # alpha = repeat(self.mix_factor, '1 -> b () t  () ()', t=t, b=bs)
+            alpha = self.mix_factor
+        elif self.merge_strategy == "learned":
+            alpha = torch.sigmoid(self.mix_factor)
+            # make shape compatible
+            # alpha = repeat(alpha, '1 -> s () ()', s = t * bs)
+        elif self.merge_strategy == "learned_with_images":
+            assert image_only_indicator is not None, "need image_only_indicator ..."
+            alpha = torch.where(
+                image_only_indicator.bool(),
+                torch.ones(1, 1, device=image_only_indicator.device),
+                rearrange(torch.sigmoid(self.mix_factor), "... -> ... 1"),
+            )
+            alpha = rearrange(alpha, self.rearrange_pattern)
+            # make shape compatible
+            # alpha = repeat(alpha, '1 -> s () ()', s = t * bs)
+        else:
+            raise NotImplementedError()
+        return alpha
+
+    def forward(
+        self,
+        x_spatial,
+        x_temporal,
+        image_only_indicator=None,
+    ) -> torch.Tensor:
+        alpha = self.get_alpha(image_only_indicator)
+        x = (
+            alpha.to(x_spatial.dtype) * x_spatial
+            + (1.0 - alpha).to(x_spatial.dtype) * x_temporal
+        )
+        return x
+
+
 def make_beta_schedule(schedule, n_timestep, linear_start=1e-4, linear_end=2e-2, cosine_s=8e-3):
     if schedule == "linear":
         betas = (

comfy/ldm/modules/temporal_ae.py

+import functools
+from typing import Callable, Iterable, Union
+
+import torch
+from einops import rearrange, repeat
+
+import comfy.ops
+
+from .diffusionmodules.model import (
+    AttnBlock,
+    Decoder,
+    ResnetBlock,
+)
+from .diffusionmodules.openaimodel import ResBlock, timestep_embedding
+from .attention import BasicTransformerBlock
+
+def partialclass(cls, *args, **kwargs):
+    class NewCls(cls):
+        __init__ = functools.partialmethod(cls.__init__, *args, **kwargs)
+
+    return NewCls
+
+
+class VideoResBlock(ResnetBlock):
+    def __init__(
+        self,
+        out_channels,
+        *args,
+        dropout=0.0,
+        video_kernel_size=3,
+        alpha=0.0,
+        merge_strategy="learned",
+        **kwargs,
+    ):
+        super().__init__(out_channels=out_channels, dropout=dropout, *args, **kwargs)
+        if video_kernel_size is None:
+            video_kernel_size = [3, 1, 1]
+        self.time_stack = ResBlock(
+            channels=out_channels,
+            emb_channels=0,
+            dropout=dropout,
+            dims=3,
+            use_scale_shift_norm=False,
+            use_conv=False,
+            up=False,
+            down=False,
+            kernel_size=video_kernel_size,
+            use_checkpoint=False,
+            skip_t_emb=True,
+        )
+
+        self.merge_strategy = merge_strategy
+        if self.merge_strategy == "fixed":
+            self.register_buffer("mix_factor", torch.Tensor([alpha]))
+        elif self.merge_strategy == "learned":
+            self.register_parameter(
+                "mix_factor", torch.nn.Parameter(torch.Tensor([alpha]))
+            )
+        else:
+            raise ValueError(f"unknown merge strategy {self.merge_strategy}")
+
+    def get_alpha(self, bs):
+        if self.merge_strategy == "fixed":
+            return self.mix_factor
+        elif self.merge_strategy == "learned":
+            return torch.sigmoid(self.mix_factor)
+        else:
+            raise NotImplementedError()
+
+    def forward(self, x, temb, skip_video=False, timesteps=None):
+        b, c, h, w = x.shape
+        if timesteps is None:
+            timesteps = b
+
+        x = super().forward(x, temb)
+
+        if not skip_video:
+            x_mix = rearrange(x, "(b t) c h w -> b c t h w", t=timesteps)
+
+            x = rearrange(x, "(b t) c h w -> b c t h w", t=timesteps)
+
+            x = self.time_stack(x, temb)
+
+            alpha = self.get_alpha(bs=b // timesteps)
+            x = alpha * x + (1.0 - alpha) * x_mix
+
+            x = rearrange(x, "b c t h w -> (b t) c h w")
+        return x
+
+
+class AE3DConv(torch.nn.Conv2d):
+    def __init__(self, in_channels, out_channels, video_kernel_size=3, *args, **kwargs):
+        super().__init__(in_channels, out_channels, *args, **kwargs)
+        if isinstance(video_kernel_size, Iterable):
+            padding = [int(k // 2) for k in video_kernel_size]
+        else:
+            padding = int(video_kernel_size // 2)
+
+        self.time_mix_conv = torch.nn.Conv3d(
+            in_channels=out_channels,
+            out_channels=out_channels,
+            kernel_size=video_kernel_size,
+            padding=padding,
+        )
+
+    def forward(self, input, timesteps=None, skip_video=False):
+        if timesteps is None:
+            timesteps = input.shape[0]
+        x = super().forward(input)
+        if skip_video:
+            return x
+        x = rearrange(x, "(b t) c h w -> b c t h w", t=timesteps)
+        x = self.time_mix_conv(x)
+        return rearrange(x, "b c t h w -> (b t) c h w")
+
+
+class AttnVideoBlock(AttnBlock):
+    def __init__(
+        self, in_channels: int, alpha: float = 0, merge_strategy: str = "learned"
+    ):
+        super().__init__(in_channels)
+        # no context, single headed, as in base class
+        self.time_mix_block = BasicTransformerBlock(
+            dim=in_channels,
+            n_heads=1,
+            d_head=in_channels,
+            checkpoint=False,
+            ff_in=True,
+        )
+
+        time_embed_dim = self.in_channels * 4
+        self.video_time_embed = torch.nn.Sequential(
+            comfy.ops.Linear(self.in_channels, time_embed_dim),
+            torch.nn.SiLU(),
+            comfy.ops.Linear(time_embed_dim, self.in_channels),
+        )
+
+        self.merge_strategy = merge_strategy
+        if self.merge_strategy == "fixed":
+            self.register_buffer("mix_factor", torch.Tensor([alpha]))
+        elif self.merge_strategy == "learned":
+            self.register_parameter(
+                "mix_factor", torch.nn.Parameter(torch.Tensor([alpha]))
+            )
+        else:
+            raise ValueError(f"unknown merge strategy {self.merge_strategy}")
+
+    def forward(self, x, timesteps=None, skip_time_block=False):
+        if skip_time_block:
+            return super().forward(x)
+
+        if timesteps is None:
+            timesteps = x.shape[0]
+
+        x_in = x
+        x = self.attention(x)
+        h, w = x.shape[2:]
+        x = rearrange(x, "b c h w -> b (h w) c")
+
+        x_mix = x
+        num_frames = torch.arange(timesteps, device=x.device)
+        num_frames = repeat(num_frames, "t -> b t", b=x.shape[0] // timesteps)
+        num_frames = rearrange(num_frames, "b t -> (b t)")
+        t_emb = timestep_embedding(num_frames, self.in_channels, repeat_only=False)
+        emb = self.video_time_embed(t_emb)  # b, n_channels
+        emb = emb[:, None, :]
+        x_mix = x_mix + emb
+
+        alpha = self.get_alpha()
+        x_mix = self.time_mix_block(x_mix, timesteps=timesteps)
+        x = alpha * x + (1.0 - alpha) * x_mix  # alpha merge
+
+        x = rearrange(x, "b (h w) c -> b c h w", h=h, w=w)
+        x = self.proj_out(x)
+
+        return x_in + x
+
+    def get_alpha(
+        self,
+    ):
+        if self.merge_strategy == "fixed":
+            return self.mix_factor
+        elif self.merge_strategy == "learned":
+            return torch.sigmoid(self.mix_factor)
+        else:
+            raise NotImplementedError(f"unknown merge strategy {self.merge_strategy}")
+
+
+
+def make_time_attn(
+    in_channels,
+    attn_type="vanilla",
+    attn_kwargs=None,
+    alpha: float = 0,
+    merge_strategy: str = "learned",
+):
+    return partialclass(
+        AttnVideoBlock, in_channels, alpha=alpha, merge_strategy=merge_strategy
+    )
+
+
+class Conv2DWrapper(torch.nn.Conv2d):
+    def forward(self, input: torch.Tensor, **kwargs) -> torch.Tensor:
+        return super().forward(input)
+
+
+class VideoDecoder(Decoder):
+    available_time_modes = ["all", "conv-only", "attn-only"]
+
+    def __init__(
+        self,
+        *args,
+        video_kernel_size: Union[int, list] = 3,
+        alpha: float = 0.0,
+        merge_strategy: str = "learned",
+        time_mode: str = "conv-only",
+        **kwargs,
+    ):
+        self.video_kernel_size = video_kernel_size
+        self.alpha = alpha
+        self.merge_strategy = merge_strategy
+        self.time_mode = time_mode
+        assert (
+            self.time_mode in self.available_time_modes
+        ), f"time_mode parameter has to be in {self.available_time_modes}"
+
+        if self.time_mode != "attn-only":
+            kwargs["conv_out_op"] = partialclass(AE3DConv, video_kernel_size=self.video_kernel_size)
+        if self.time_mode not in ["conv-only", "only-last-conv"]:
+            kwargs["attn_op"] = partialclass(make_time_attn, alpha=self.alpha, merge_strategy=self.merge_strategy)
+        if self.time_mode not in ["attn-only", "only-last-conv"]:
+            kwargs["resnet_op"] = partialclass(VideoResBlock, video_kernel_size=self.video_kernel_size, alpha=self.alpha, merge_strategy=self.merge_strategy)
+
+        super().__init__(*args, **kwargs)
+
+    def get_last_layer(self, skip_time_mix=False, **kwargs):
+        if self.time_mode == "attn-only":
+            raise NotImplementedError("TODO")
+        else:
+            return (
+                self.conv_out.time_mix_conv.weight
+                if not skip_time_mix
+                else self.conv_out.weight
+            )

comfy/model_base.py

@@ -10,17 +10,22 @@ from . import utils
 class ModelType(Enum):
     EPS = 1
     V_PREDICTION = 2
+    V_PREDICTION_EDM = 3
 
 
-from comfy.model_sampling import EPS, V_PREDICTION, ModelSamplingDiscrete
+from comfy.model_sampling import EPS, V_PREDICTION, ModelSamplingDiscrete, ModelSamplingContinuousEDM
+
 
 def model_sampling(model_config, model_type):
+    s = ModelSamplingDiscrete
+
     if model_type == ModelType.EPS:
         c = EPS
     elif model_type == ModelType.V_PREDICTION:
         c = V_PREDICTION
-
-    s = ModelSamplingDiscrete
+    elif model_type == ModelType.V_PREDICTION_EDM:
+        c = V_PREDICTION
+        s = ModelSamplingContinuousEDM
 
     class ModelSampling(s, c):
         pass
@@ -262,3 +267,48 @@ class SDXL(BaseModel):
         out.append(self.embedder(torch.Tensor([target_width])))
         flat = torch.flatten(torch.cat(out)).unsqueeze(dim=0).repeat(clip_pooled.shape[0], 1)
         return torch.cat((clip_pooled.to(flat.device), flat), dim=1)
+
+class SVD_img2vid(BaseModel):
+    def __init__(self, model_config, model_type=ModelType.V_PREDICTION_EDM, device=None):
+        super().__init__(model_config, model_type, device=device)
+        self.embedder = Timestep(256)
+
+    def encode_adm(self, **kwargs):
+        fps_id = kwargs.get("fps", 6) - 1
+        motion_bucket_id = kwargs.get("motion_bucket_id", 127)
+        augmentation = kwargs.get("augmentation_level", 0)
+
+        out = []
+        out.append(self.embedder(torch.Tensor([fps_id])))
+        out.append(self.embedder(torch.Tensor([motion_bucket_id])))
+        out.append(self.embedder(torch.Tensor([augmentation])))
+
+        flat = torch.flatten(torch.cat(out)).unsqueeze(dim=0)
+        return flat
+
+    def extra_conds(self, **kwargs):
+        out = {}
+        adm = self.encode_adm(**kwargs)
+        if adm is not None:
+            out['y'] = comfy.conds.CONDRegular(adm)
+
+        latent_image = kwargs.get("concat_latent_image", None)
+        noise = kwargs.get("noise", None)
+        device = kwargs["device"]
+
+        if latent_image is None:
+            latent_image = torch.zeros_like(noise)
+
+        if latent_image.shape[1:] != noise.shape[1:]:
+            latent_image = utils.common_upscale(latent_image, noise.shape[-1], noise.shape[-2], "bilinear", "center")
+
+        latent_image = utils.repeat_to_batch_size(latent_image, noise.shape[0])
+
+        out['c_concat'] = comfy.conds.CONDNoiseShape(latent_image)
+
+        if "time_conditioning" in kwargs:
+            out["time_context"] = comfy.conds.CONDCrossAttn(kwargs["time_conditioning"])
+
+        out['image_only_indicator'] = comfy.conds.CONDConstant(torch.zeros((1,), device=device))
+        out['num_video_frames'] = comfy.conds.CONDConstant(noise.shape[0])
+        return out

comfy/model_detection.py

@@ -24,7 +24,8 @@ def calculate_transformer_depth(prefix, state_dict_keys, state_dict):
         last_transformer_depth = count_blocks(state_dict_keys, transformer_prefix + '{}')
         context_dim = state_dict['{}0.attn2.to_k.weight'.format(transformer_prefix)].shape[1]
         use_linear_in_transformer = len(state_dict['{}1.proj_in.weight'.format(prefix)].shape) == 2
-        return last_transformer_depth, context_dim, use_linear_in_transformer
+        time_stack = '{}1.time_stack.0.attn1.to_q.weight'.format(prefix) in state_dict or '{}1.time_mix_blocks.0.attn1.to_q.weight'.format(prefix) in state_dict
+        return last_transformer_depth, context_dim, use_linear_in_transformer, time_stack
     return None
 
 def detect_unet_config(state_dict, key_prefix, dtype):
@@ -57,6 +58,7 @@ def detect_unet_config(state_dict, key_prefix, dtype):
     context_dim = None
     use_linear_in_transformer = False
 
+    video_model = False
 
     current_res = 1
     count = 0
@@ -99,6 +101,7 @@ def detect_unet_config(state_dict, key_prefix, dtype):
                     if context_dim is None:
                         context_dim = out[1]
                         use_linear_in_transformer = out[2]
+                        video_model = out[3]
                 else:
                     transformer_depth.append(0)
 
@@ -127,6 +130,19 @@ def detect_unet_config(state_dict, key_prefix, dtype):
     unet_config["transformer_depth_middle"] = transformer_depth_middle
     unet_config['use_linear_in_transformer'] = use_linear_in_transformer
     unet_config["context_dim"] = context_dim
+
+    if video_model:
+        unet_config["extra_ff_mix_layer"] = True
+        unet_config["use_spatial_context"] = True
+        unet_config["merge_strategy"] = "learned_with_images"
+        unet_config["merge_factor"] = 0.0
+        unet_config["video_kernel_size"] = [3, 1, 1]
+        unet_config["use_temporal_resblock"] = True
+        unet_config["use_temporal_attention"] = True
+    else:
+        unet_config["use_temporal_resblock"] = False
+        unet_config["use_temporal_attention"] = False
+
     return unet_config
 
 def model_config_from_unet_config(unet_config):

comfy/model_sampling.py

 import torch
 import numpy as np
 from comfy.ldm.modules.diffusionmodules.util import make_beta_schedule
-
+import math
 
 class EPS:
     def calculate_input(self, sigma, noise):
@@ -83,3 +83,47 @@ class ModelSamplingDiscrete(torch.nn.Module):
         percent = 1.0 - percent
         return self.sigma(torch.tensor(percent * 999.0)).item()
 
+
+class ModelSamplingContinuousEDM(torch.nn.Module):
+    def __init__(self, model_config=None):
+        super().__init__()
+        self.sigma_data = 1.0
+
+        if model_config is not None:
+            sampling_settings = model_config.sampling_settings
+        else:
+            sampling_settings = {}
+
+        sigma_min = sampling_settings.get("sigma_min", 0.002)
+        sigma_max = sampling_settings.get("sigma_max", 120.0)
+        self.set_sigma_range(sigma_min, sigma_max)
+
+    def set_sigma_range(self, sigma_min, sigma_max):
+        sigmas = torch.linspace(math.log(sigma_min), math.log(sigma_max), 1000).exp()
+
+        self.register_buffer('sigmas', sigmas) #for compatibility with some schedulers
+        self.register_buffer('log_sigmas', sigmas.log())
+
+    @property
+    def sigma_min(self):
+        return self.sigmas[0]
+
+    @property
+    def sigma_max(self):
+        return self.sigmas[-1]
+
+    def timestep(self, sigma):
+        return 0.25 * sigma.log()
+
+    def sigma(self, timestep):
+        return (timestep / 0.25).exp()
+
+    def percent_to_sigma(self, percent):
+        if percent <= 0.0:
+            return 999999999.9
+        if percent >= 1.0:
+            return 0.0
+        percent = 1.0 - percent
+
+        log_sigma_min = math.log(self.sigma_min)
+        return math.exp((math.log(self.sigma_max) - log_sigma_min) * percent + log_sigma_min)

comfy/sd.py

@@ -159,7 +159,15 @@ class VAE:
         self.memory_used_decode = lambda shape, dtype: (2178 * shape[2] * shape[3] * 64) * model_management.dtype_size(dtype)
 
         if config is None:
-            if "taesd_decoder.1.weight" in sd:
+            if "decoder.mid.block_1.mix_factor" in sd:
+                encoder_config = {'double_z': True, 'z_channels': 4, 'resolution': 256, 'in_channels': 3, 'out_ch': 3, 'ch': 128, 'ch_mult': [1, 2, 4, 4], 'num_res_blocks': 2, 'attn_resolutions': [], 'dropout': 0.0}
+                decoder_config = encoder_config.copy()
+                decoder_config["video_kernel_size"] = [3, 1, 1]
+                decoder_config["alpha"] = 0.0
+                self.first_stage_model = AutoencodingEngine(regularizer_config={'target': "comfy.ldm.models.autoencoder.DiagonalGaussianRegularizer"},
+                                                            encoder_config={'target': "comfy.ldm.modules.diffusionmodules.model.Encoder", 'params': encoder_config},
+                                                            decoder_config={'target': "comfy.ldm.modules.temporal_ae.VideoDecoder", 'params': decoder_config})
+            elif "taesd_decoder.1.weight" in sd:
                 self.first_stage_model = comfy.taesd.taesd.TAESD()
             else:
                 #default SD1.x/SD2.x VAE parameters

comfy/supported_models.py

@@ -17,6 +17,7 @@ class SD15(supported_models_base.BASE):
         "model_channels": 320,
         "use_linear_in_transformer": False,
         "adm_in_channels": None,
+        "use_temporal_attention": False,
     }
 
     unet_extra_config = {
@@ -56,6 +57,7 @@ class SD20(supported_models_base.BASE):
         "model_channels": 320,
         "use_linear_in_transformer": True,
         "adm_in_channels": None,
+        "use_temporal_attention": False,
     }
 
     latent_format = latent_formats.SD15
@@ -88,6 +90,7 @@ class SD21UnclipL(SD20):
         "model_channels": 320,
         "use_linear_in_transformer": True,
         "adm_in_channels": 1536,
+        "use_temporal_attention": False,
     }
 
     clip_vision_prefix = "embedder.model.visual."
@@ -100,6 +103,7 @@ class SD21UnclipH(SD20):
         "model_channels": 320,
         "use_linear_in_transformer": True,
         "adm_in_channels": 2048,
+        "use_temporal_attention": False,
     }
 
     clip_vision_prefix = "embedder.model.visual."
@@ -112,6 +116,7 @@ class SDXLRefiner(supported_models_base.BASE):
         "context_dim": 1280,
         "adm_in_channels": 2560,
         "transformer_depth": [0, 0, 4, 4, 4, 4, 0, 0],
+        "use_temporal_attention": False,
     }
 
     latent_format = latent_formats.SDXL
@@ -148,7 +153,8 @@ class SDXL(supported_models_base.BASE):
         "use_linear_in_transformer": True,
         "transformer_depth": [0, 0, 2, 2, 10, 10],
         "context_dim": 2048,
-        "adm_in_channels": 2816
+        "adm_in_channels": 2816,
+        "use_temporal_attention": False,
     }
 
     latent_format = latent_formats.SDXL
@@ -203,8 +209,34 @@ class SSD1B(SDXL):
         "use_linear_in_transformer": True,
         "transformer_depth": [0, 0, 2, 2, 4, 4],
         "context_dim": 2048,
-        "adm_in_channels": 2816
+        "adm_in_channels": 2816,
+        "use_temporal_attention": False,
     }
 
+class SVD_img2vid(supported_models_base.BASE):
+    unet_config = {
+        "model_channels": 320,
+        "in_channels": 8,
+        "use_linear_in_transformer": True,
+        "transformer_depth": [1, 1, 1, 1, 1, 1, 0, 0],
+        "context_dim": 1024,
+        "adm_in_channels": 768,
+        "use_temporal_attention": True,
+        "use_temporal_resblock": True
+    }
+
+    clip_vision_prefix = "conditioner.embedders.0.open_clip.model.visual."
+
+    latent_format = latent_formats.SD15
+
+    sampling_settings = {"sigma_max": 700.0, "sigma_min": 0.002}
+
+    def get_model(self, state_dict, prefix="", device=None):
+        out = model_base.SVD_img2vid(self, device=device)
+        return out
+
+    def clip_target(self):
+        return None
 
 models = [SD15, SD20, SD21UnclipL, SD21UnclipH, SDXLRefiner, SDXL, SSD1B]
+models += [SVD_img2vid]

comfy_extras/nodes_model_advanced.py

@@ -128,6 +128,36 @@ class ModelSamplingDiscrete:
         m.add_object_patch("model_sampling", model_sampling)
         return (m, )
 
+class ModelSamplingContinuousEDM:
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required": { "model": ("MODEL",),
+                              "sampling": (["v_prediction", "eps"],),
+                              "sigma_max": ("FLOAT", {"default": 120.0, "min": 0.0, "max": 1000.0, "step":0.001, "round": False}),
+                              "sigma_min": ("FLOAT", {"default": 0.002, "min": 0.0, "max": 1000.0, "step":0.001, "round": False}),
+                              }}
+
+    RETURN_TYPES = ("MODEL",)
+    FUNCTION = "patch"
+
+    CATEGORY = "advanced/model"
+
+    def patch(self, model, sampling, sigma_max, sigma_min):
+        m = model.clone()
+
+        if sampling == "eps":
+            sampling_type = comfy.model_sampling.EPS
+        elif sampling == "v_prediction":
+            sampling_type = comfy.model_sampling.V_PREDICTION
+
+        class ModelSamplingAdvanced(comfy.model_sampling.ModelSamplingContinuousEDM, sampling_type):
+            pass
+
+        model_sampling = ModelSamplingAdvanced()
+        model_sampling.set_sigma_range(sigma_min, sigma_max)
+        m.add_object_patch("model_sampling", model_sampling)
+        return (m, )
+
 class RescaleCFG:
     @classmethod
     def INPUT_TYPES(s):
@@ -169,5 +199,6 @@ class RescaleCFG:
 
 NODE_CLASS_MAPPINGS = {
     "ModelSamplingDiscrete": ModelSamplingDiscrete,
+    "ModelSamplingContinuousEDM": ModelSamplingContinuousEDM,
     "RescaleCFG": RescaleCFG,
 }