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----
-name: fujifilm-video-stabilization
-description: "Stabilize shaky Fujifilm X100V videos (DSCF*.MOV) using ffmpeg's 2-pass vidstab filter and encode compact 4K HEVC MP4 output. Handles motion detection, transform and sharpening, Intel VAAPI acceleration with a software fallback, cleanup, verification, and batch processing. Use when asked to stabilize video, reduce camera shake, smooth handheld footage, compress stabilized video, or process Fujifilm X100V MOV files. Triggers on: stabilize video, reduce camera shake, vidstab, ffmpeg stabilization, Fujifilm X100V, compress video, smooth footage, handheld video."
----
-
-# Fujifilm X100V Video Stabilization
-
-2-pass ffmpeg vidstab workflow to remove camera shake from Fujifilm X100V `.MOV` clips.
-Outputs compact 4K HEVC `.mp4` files; cleans up temp `.trf` files when done.
-
-## When to Use
-
-- User wants to **stabilize shaky video** or **reduce camera shake**
-- Source files are Fujifilm X100V `.MOV` clips (e.g. `DSCF7259.MOV`)
-- User asks to **process multiple clips** in a folder
-- Triggers: *stabilize video*, *reduce shake*, *vidstab*, *smooth handheld footage*
-
-## Required Tools
-
-- `ffmpeg` with `libvidstab` enabled (verify: `ffmpeg -filters 2>/dev/null | grep vidstab`)
-- Intel VAAPI HEVC support through `/dev/dri/renderD128` (preferred)
-- Input location: `/home/paul/syncthing/Documents/Inbox/Fujifilm/` (typical)
-
-## 2-Pass Workflow
-
-### Pass 1 — Motion Detection
-
-Analyze each clip and write transform data to a `.trf` file:
-
-```bash
-ffmpeg -y -i DSCF7259.MOV -vf vidstabdetect=result=DSCF7259.trf -f null -
-```
-
-- `vidstabdetect` uses default parameters (`shakiness=5`, `accuracy=15`) — these work well for typical X100V handheld clips.
-- `-f null -` discards output; only the `.trf` sidecar is produced.
-- Run pass 1 for all clips **before** starting pass 2 (they can run in parallel if CPU allows).
-
-### Pass 2 — Stabilize, Sharpen, and Compress
-
-Apply transforms, add a mild unsharp pass, and encode directly to a compact HEVC MP4:
-
-```bash
-ffmpeg -y -vaapi_device /dev/dri/renderD128 -i DSCF7259.MOV \
-  -map 0:v:0 -map "0:a:0?" \
-  -vf "vidstabtransform=input=DSCF7259.trf,unsharp=5:5:0.8:3:3:0.4,format=nv12,hwupload" \
-  -c:v hevc_vaapi -rc_mode CQP -global_quality 34 -tag:v hvc1 \
-  -c:a aac -b:a 128k -movflags +faststart stabilised-DSCF7259.mp4
-```
-
-- `unsharp=5:5:0.8:3:3:0.4` — luma and chroma unsharp with mild strength (0.8 / 0.4); compensates for the slight softening vidstab introduces.
-- VAAPI performs the expensive 4K HEVC encode on the Intel GPU.
-- Quality 34 reduces typical stabilized videos by roughly 80% while retaining 4K resolution. Use 30–32 when higher quality is more important than size.
-- AAC audio and `hvc1` tagging provide broad MP4 compatibility. `faststart` makes remote playback begin sooner.
-- Output is named `stabilised-<original>.mp4` to keep it alongside the source.
-
-If VAAPI is unavailable, use software HEVC encoding instead (this is substantially slower):
-
-```bash
-ffmpeg -y -i DSCF7259.MOV -map 0:v:0 -map "0:a:0?" \
-  -vf "vidstabtransform=input=DSCF7259.trf,unsharp=5:5:0.8:3:3:0.4" \
-  -c:v libx265 -preset medium -crf 28 -tag:v hvc1 \
-  -c:a aac -b:a 128k -movflags +faststart stabilised-DSCF7259.mp4
-```
-
-### Cleanup
-
-Remove temp transform files after both passes succeed:
-
-```bash
-rm -f *.trf
-```
-
-## Batch Processing
-
-For all `.MOV` files in the current directory, run pass 1 in parallel, then pass 2 serially:
-
-```bash
-# Pass 1 — all clips in parallel
-for f in *.MOV; do
-  base="${f%.MOV}"
-  ffmpeg -y -i "$f" -vf vidstabdetect=result="${base}.trf" -f null - &
-done
-wait
-
-# Pass 2 — serial to avoid overloading the GPU
-for f in *.MOV; do
-  base="${f%.MOV}"
-  ffmpeg -y -vaapi_device /dev/dri/renderD128 -i "$f" \
-    -map 0:v:0 -map "0:a:0?" \
-    -vf "vidstabtransform=input=${base}.trf,unsharp=5:5:0.8:3:3:0.4,format=nv12,hwupload" \
-    -c:v hevc_vaapi -rc_mode CQP -global_quality 34 -tag:v hvc1 \
-    -c:a aac -b:a 128k -movflags +faststart \
-    "stabilised-${base}.mp4"
-done
-
-rm -f *.trf
-```
-
-## Verify Output
-
-Check duration and file size of stabilized clips:
-
-```bash
-for f in stabilised-*.mp4; do
-  echo -n "$f: "
-  ffprobe -v error -show_entries format=duration,size -of csv=p=0 "$f"
-  ffmpeg -v error -i "$f" -f null -
-done
-```
-
-## Notes
-
-- **Syncthing caveat**: the `Fujifilm` folder is synced. If files vanish mid-session, Syncthing may have moved them after detecting completion. Check `~/.local/share/syncthing/` or other sync peers.
-- **Quality**: default vidstab params produce good results for typical X100V handheld footage. For extremely shaky video, add `shakiness=10:accuracy=15` to the pass 1 filter.
-- **Output size**: HEVC quality 34 reduced a 334 MB stabilized test clip to 58 MB without changing its 3840×2160 resolution or duration.
-- **Avoid intermediate encodes**: encode the stabilized MP4 directly from the camera `.MOV`. Do not first create a VP9 MKV and then transcode it, because that wastes time and adds generation loss.