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mtmd: support "frame merge" for qwen-vl-based models (#21858)

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* feat: add video support for Qwen3.5

* various clean up

* revise the design

* fix llava-uhd case

* nits

* nits 2

---------

Co-authored-by: andrewmd5 <1297077+andrewmd5@users.noreply.github.com>
This commit is contained in:
Xuan-Son Nguyen
2026-06-06 21:17:25 +02:00
committed by GitHub
co-authored by andrewmd5
parent 6b80c74f28
commit 31e82494c0
10 changed files with 197 additions and 74 deletions
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tools/mtmd/models/qwen3vl.cpp
+2 -9
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@@ -13,17 +13,10 @@ ggml_cgraph * clip_graph_qwen3vl::build() {
int mrope_sections[4] = {d_head/4, d_head/4, d_head/4, d_head/4};
ggml_tensor * inp_raw = build_inp_raw();
ggml_tensor * inp = ggml_conv_2d(ctx0, model.patch_embeddings_0, inp_raw, patch_size, patch_size, 0, 0, 1, 1);
ggml_tensor * inp = build_inp_with_temporal_merge();
GGML_ASSERT(img.nx() % (patch_size * 2) == 0);
GGML_ASSERT(img.ny() % (patch_size * 2) == 0);
// second conv dimension
// spatial merge
{
auto inp_1 = ggml_conv_2d(ctx0, model.patch_embeddings_1, inp_raw, patch_size, patch_size, 0, 0, 1, 1);
inp = ggml_add(ctx0, inp, inp_1);
inp = ggml_permute(ctx0, inp, 1, 2, 0, 3); // [w, h, c, b] -> [c, w, h, b]
inp = ggml_cont_4d(
ctx0, inp,