Built-in diagnostics

The window has a Run diagnostics button (--diagnose opens the window and starts the checks). It runs every check in a separate process, so a failure or crash of one check never stops the report, and writes Voxprint-MovieDubber-Diagnostics-<date>.txt to the Desktop (a copy goes to the app's data folder). The report is plain English text.

It covers: GPU name, compute capability, driver branch, VRAM, RAM and CUDA; FlashAttention and CUDA Graphs availability and whether they really work; model load times

The GPU check fails when there is no NVIDIA GPU, when compute capability is below 8.9 (RTX 40 / Ada or newer), or when the driver branch is below 600. A separate check fails when CTranslate2 sees no CUDA device (it needs the CUDA 12 libraries from nvidia-cublas-cu12 and nvidia-cudnn-cu12). (VAD, separation, speech recognition, diarization, translation, TTS); TTS real-time factor on short phrases in four modes (SDPA, FlashAttention-2, CUDA Graphs, both); timings of each stage on a short bundled test clip; ffmpeg; errors with tracebacks. Tokens and the Windows user name are masked in the report.

Command line: --diagnose (window, starts at once), --diagnose-cli (console), --quick, --no-download, --out <file>.