migraphx bug [vapoursynth]

[ryou128hr]

Arch linux

CPU 5700X3d

MPV player
Vapoursynth

RX 7800XT

GPU color noise i, stutter without framedrop

gpu usage 60%

stutter with num_streams=>2

Code:

onnx:

Comapct 2x ( 960x540 reize 1920x1080)

/opt/rocm/bin/migraphx-driver compile --onnx 2x_Compact_fp32_op17.onnx --gpu --optimize --binary --output Compact.mxr --input-dim @input 1 3 540 960 --fp16

VS:

import vapoursynth as vs
core = vs.core
core.std.LoadPlugin( "/usr/local/lib/libvsmigx.so")
clip= video_in
clip = video_in
clip = vs.core.resize.Bicubic(clip,format=vs.RGBS, matrix_in_s=709)
clip = core.migx.Model(clip, program_path="/home/ryou/Videos/Compact.mxr",num_streams=1,tilesize=[960,540],overlap=[0, 0])
clip = vs.core.resize.Bicubic(clip,format=vs.YUV420P8, matrix_s=709)
clip.set_output()

What is the cause?

[ppanchad-amd]

Hi @ryou128hr. Internal ticket has been created to assist with your issue. Thanks!

[adityas-amd]

Hi @ryou128hr To help us reproduce and debug this properly, could you please share the following?

1. The 2x_Compact_fp32_op17.onnx model used during compilation.
2. A short sample video clip (or any test pattern) that reproduces the stutter issue.
3. Exact ROCm and MIGraphX versions you're using (output of rocminfo, migraphx-driver --version, and rocm-smi would be helpful).
   My initial speculation is-
   Using num_streams=2 might be invoking an async multi-queue path in MIGraphX → ROCm stack, which may have synchronization issues in the VapourSynth integration layer or driver layer.

Noise/stutter without frame drop suggests timing or scheduling inconsistencies — possibly caused by tiling overlap issues (tilesize=[960,540], overlap=[0,0]) on the 7800XT architecture.