_on_extract_audio clamped the duration to (timeline_duration - cursor), so with
the playhead within the requested length of the end (or any under-reported
duration) a 30s request was silently truncated to whatever remained — the user
asked for 30s and got 3s with no indication why.
Drop the clamp: pass the requested length straight to ffmpeg, which stops
cleanly at end-of-file if the source is shorter. Then ffprobe the result and,
when it comes up short, say so ("Saved 3.0s — source ended before 30.0s
requested") instead of silently shrinking. When there's room, 30s now yields
exactly 30s.
Adds core.ffmpeg.probe_duration(). Verified end-to-end: a fitting request
returns the exact length; a genuine near-end request returns the available
audio (rc=0) and is reported as truncated.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
A dedicated "♪ Extract audio" button on the transport row grabs an exact
length of audio (set via the adjacent length box, from the playhead) and opens
a Save As dialog. Output format follows the chosen extension — WAV (pcm_s16le),
MP3 (libmp3lame), FLAC, m4a/aac, ogg/opus — re-encoding as needed; unknown
extensions let ffmpeg pick from the container.
- core.ffmpeg.build_audio_clip_command(input, start, duration, out_path):
fast-seek + exact -t duration + -vn, codec by extension. Verified end-to-end
(wav/mp3/flac all land at exactly the requested duration).
- Timeline shows the audio area as a distinct teal dashed band spanning
[cursor, cursor+length], updated live as the playhead or length changes, so
you see exactly what will be extracted.
- Length + last save dir persist in QSettings; button enabled once a file loads.
Tests: 3 core (codec-by-extension, exact length, case-insensitive) + 2 GUI
(controls exist, band tracks cursor/length).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add clip duration spinner (2–30s, default 8s) replacing all hardcoded
8.0 references. Store clip_duration in DB for accurate re-export span
calculations. Add x2/x4 playback speed toggle buttons. On Windows, mpv
renders directly into the widget's native window handle (WId embedding)
instead of slow FBO readback; crop overlays use a transparent child
widget. Fix _poll_render crash when player is None after closeEvent.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Set CQ/QP rate control (quality 28) for NVENC, VAAPI, QSV, and AMF
hardware encoders instead of relying on encoder defaults which
produce unnecessarily large files.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Scan regions can be disabled (Del/Backspace) instead of deleted, shown greyed out
- Resize scan regions by dragging timeline edges or editing table cells
- Grey ghost overlay shows trimmed portions of resized regions
- Ctrl+Z undo for disable, resize, drag, and negative toggle actions
- Fix training stats including scan-exported clips when checkbox unchecked
- Switch classifier to HistGradientBoostingClassifier (multi-threaded)
- Timestamped model saves with latest copy at base path
- Fix next-folder counter not detecting scan export folders
- Each scan area exports to its own numbered clip folder
- Platform-aware HW encoder detection (Linux/Windows/macOS)
- Auto-detect VAAPI render device instead of hardcoding
- Use shutil.move for cross-drive safety on Windows
- Comprehensive README rewrite with scan workflow documentation
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Ethanfel