scripts: stabilize-video — fix EXIT trap unbound var under set -u

trf_dir was declared local in main(), so the EXIT trap referencing it
fired after main returned — under set -u that became an unbound variable
error and the script exited non-zero even though stabilization succeeded.
Hoist trf_dir to script scope and guard the trap.

1 files changed, 2 insertions, 2 deletions

diff --git a/scripts/stabilize-video b/scripts/stabilize-video
index 0647a36..4490ec8 100755
--- a/scripts/stabilize-video
+++ b/scripts/stabilize-video
@@ -14,6 +14,7 @@
 set -euo pipefail
 
 VADEVICE="/dev/dri/renderD128"
+trf_dir=""              # set by main; cleaned up by EXIT trap
 QUALITY="${QUALITY:-34}"          # HEVC CQP quality (higher = smaller)
 SHAKINESS="${SHAKINESS:-5}"       # vidstab shakiness 1..10
 ACCURACY="${ACCURACY:-15}"        # vidstab accuracy 1..15
@@ -92,9 +93,8 @@ main() {
 
   # Build the work list, skipping clips whose output already exists.
   local -a todo=()
-  local trf_dir
   trf_dir=$(mktemp -d -t stabilize-video.XXXXXX)
-  trap 'rm -rf "$trf_dir"' EXIT
+  trap '[[ -n "$trf_dir" ]] && rm -rf "$trf_dir"' EXIT
 
   for src in "${_mov_files[@]}"; do
     local out