folders

2025-10-25 18:17:56 +01:00
parent d5fa0bcb12
commit 9e7672c05a
39 changed files with 689 additions and 0 deletions
--- a/remove-text.sh
+++ b/remove-text.sh
@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# remove_text.sh — conceal on-screen text in a rectangular area for a chosen time window.
+# Requires: ffmpeg (with delogo filter)
+
+show_help() {
+  cat <<'EOF'
+Usage:
+  remove_text.sh -i INPUT -o OUTPUT --x X --y Y --w W --h H [--start SEC] [--end SEC] [--feather PX] [--preview] [--dry-run]
+
+Params:
+  -i, --input     Input video file
+  -o, --output    Output video file
+      --x         Left coordinate of the box (pixels)
+      --y         Top coordinate of the box (pixels)
+      --w         Box width (pixels)
+      --h         Box height (pixels)
+      --start     Start time in seconds (e.g. 12 or 12.5). If omitted, applies from t=0.
+      --end       End time in seconds (exclusive). If omitted, applies to end of video.
+      --feather   Feather thickness for delogo (default: 8). Higher = softer edge.
+      --preview   Instead of removing, draw a red box to help align the area.
+      --dry-run   Print the ffmpeg command but don't execute it.
+  -h, --help      Show this help
+
+Examples:
+  Preview the area (draws box only):
+    remove_text.sh -i in.mp4 -o preview.mp4 --x 120 --y 940 --w 680 --h 60 --start 12.5 --end 28.3 --preview
+
+  Remove text in that area/time range:
+    remove_text.sh -i in.mp4 -o out.mp4    --x 120 --y 940 --w 680 --h 60 --start 12.5 --end 28.3
+EOF
+}
+
+# ---- defaults ----
+INPUT=""
+OUTPUT=""
+X=""
+Y=""
+W=""
+H=""
+START=""
+END=""
+FEATHER="8"
+PREVIEW="0"
+DRYRUN="0"
+
+# ---- parse args ----
+if [[ $# -eq 0 ]]; then show_help; exit 1; fi
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    -i|--input)   INPUT="${2:-}"; shift 2;;
+    -o|--output)  OUTPUT="${2:-}"; shift 2;;
+    --x)          X="${2:-}"; shift 2;;
+    --y)          Y="${2:-}"; shift 2;;
+    --w)          W="${2:-}"; shift 2;;
+    --h)          H="${2:-}"; shift 2;;
+    --start)      START="${2:-}"; shift 2;;
+    --end)        END="${2:-}"; shift 2;;
+    --feather)    FEATHER="${2:-}"; shift 2;;
+    --preview)    PREVIEW="1"; shift;;
+    --dry-run)    DRYRUN="1"; shift;;
+    -h|--help)    show_help; exit 0;;
+    *) echo "Unknown argument: $1"; echo; show_help; exit 1;;
+  esac
+done
+
+# ---- validation ----
+if [[ -z "$INPUT" || -z "$OUTPUT" || -z "$X" || -z "$Y" || -z "$W" || -z "$H" ]]; then
+  echo "Error: Missing required arguments."; echo
+  show_help; exit 1
+fi
+
+if ! command -v ffmpeg >/dev/null 2>&1; then
+  echo "Error: ffmpeg not found in PATH."; exit 1
+fi
+
+# Build enable expression based on start/end
+ENABLE_EXPR=""
+if [[ -n "$START" && -n "$END" ]]; then
+  ENABLE_EXPR="between(t\,${START}\,${END})"
+elif [[ -n "$START" ]]; then
+  ENABLE_EXPR="gte(t\,${START})"
+elif [[ -n "$END" ]]; then
+  ENABLE_EXPR="lte(t\,${END})"
+else
+  ENABLE_EXPR=""  # apply for whole video
+fi
+
+# Build filter chain
+if [[ "$PREVIEW" == "1" ]]; then
+  if [[ -n "$ENABLE_EXPR" ]]; then
+    VFILTER="drawbox=x=${X}:y=${Y}:w=${W}:h=${H}:color=red@0.5:thickness=2:enable='${ENABLE_EXPR}'"
+  else
+    VFILTER="drawbox=x=${X}:y=${Y}:w=${W}:h=${H}:color=red@0.5:thickness=2"
+  fi
+else
+  # delogo: x, y, w, h, t = feather thickness; show=0 (no outline)
+  # delogo: x, y, w, h, band = feather thickness; show=0 (no outline)
+  if [[ -n "$ENABLE_EXPR" ]]; then
+    VFILTER="delogo=x=${X}:y=${Y}:w=${W}:h=${H}:show=0:enable='${ENABLE_EXPR}'"
+  else
+    VFILTER="delogo=x=${X}:y=${Y}:w=${W}:h=${H}:show=0"
+  fi
+
+fi
+
+# Assemble ffmpeg command
+# -c:v libx264 -crf 18: quality/size balance; adjust as needed
+# -preset medium: speed/efficiency tradeoff
+# -c:a copy: keep original audio
+CMD=(ffmpeg -hide_banner -y -i "$INPUT" -vf "$VFILTER" -c:v libx264 -crf 18 -preset medium -c:a copy "$OUTPUT")
+
+echo "Running:"
+printf ' %q' "${CMD[@]}"; echo
+
+if [[ "$DRYRUN" == "1" ]]; then
+  exit 0
+fi
+
+"${CMD[@]}"
+
+echo "Done: $OUTPUT"