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DLSS 5 Video Converter v0.1.2

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@perseval-BLR perseval-BLR released this 02 Sep 12:06
· 10 commits to main since this release
v0.1.2
4ea0320

DLSS 5 Video Converter v0.1.2

Local web tool that runs video through NVIDIA DLSS 5 Neural Rendering (NGX feature 18, nvngx_dlssnr.dll) with optical-flow motion vectors and encodes the result with NVENC.

Run: unzip → DLSS5VideoConverter.exe → browser opens at http://127.0.0.1:7860 → add a video → Render.

v0.1.2 — fps fix, lossless, auto-exit

  • Fixed 60 fps videos being slowed to 30 fps (regression from v0.1.1): the intermediate stream now uses the input's frame rate as its time base, so the original fps is preserved.
  • Lossless encoding (Quality → "Lossless (NVENC)"): -tune lossless for H.264/HEVC NVENC (yuv444p), software fallback -crf 0. AV1 NVENC has no lossless mode — a clear error is shown instead.
  • Auto-exit when the browser tab is closed: the page sends a heartbeat; if no tabs are left (30 s of silence) and no render is running, the app shuts itself down — no more killing it via Task Manager.
  • Exit button (⏻) in the header with confirmation.

v0.1.1 — crash fixes

  • Fixed a hard crash on videos whose time base is not 1/30 (most MP4s): the intermediate NUT stream used the input's time base, and the NUT muxer crashed while writing the trailer — the process died silently, leaving a truncated processed-video.mkv in jobs/. The stream now always uses 1/30 and PTS values are converted from the input scale.
  • Fixed Invalid argument: '!?' returned 22: PyAV raised EINVAL on frames with invalid PTS (None / negative / NOPTS) that the decoder can emit after scene cuts. PTS is now sanitized and forced strictly monotonic.

Features

  • Profiles: Faithful / Natural / Strong-Cinematic / Extreme-Overdrive (intensity up to 3.0)
  • NR sliders: Intensity, Local Tone, Local Structure, Skin Structure (0–3, skin from −1) — manual values override the profile
  • Encoding: H.264 / HEVC / AV1 (NVENC, software fallback), MP4 / MKV, CRF 17/20/24
  • Split compare: original vs result, two synced players, sound from the result
  • Metrics: PSNR / SSIM on every 30th frame (in the JSON report)
  • UI: RU/EN, dark/light theme, results feed with Download/JSON, README modal, drag&drop or Add button
  • Original source video is kept in originals/ for comparison

Requirements

  • Windows 10/11 64-bit
  • NVIDIA RTX 40/50 (RTX 30 — beta, very slow)
  • Recent NVIDIA driver

Honest limitations

  • Render path is RGBA8 — HDR input is converted to SDR (not mislabeled as HDR)
  • Optical-flow motion ≠ engine motion vectors: fast motion, occlusions, thin objects, cuts may show temporal artifacts
  • nvngx.dll in bin/runtime is a modified shim (caller-check wrapper), not NVIDIA's NGX core; the bundled model is modified for standalone calls
  • Every frame must return a successful feature-18 result or the render is rejected
  • First run on 4K video may take 1–3 minutes for analysis (ffprobe decodes frames)

Source

Full source in this repo: app.py, dlss5_converter/, build_exe.bat (PyInstaller), native/ (worker sources).

Made by Perseval — https://youtube.com/@perseval_BLR

RTX 40 Series (Ada) build

DLSS5-Video-Converter-v0.1.1-RTX40-win64.zip — same app with a community-patched nvngx_dlssnr.dll (Ada CUDA binaries) for GeForce RTX 40 Series. Experimental (Uncle Burrito / dev-camo patch): expect a large performance hit vs RTX 50 and possible visual artifacts. Do NOT use the patched DLL in online / anti-cheat-protected games. RTX 20/30 are NOT supported.

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