first commit

checkmp4.sh

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+#!/usr/bin/env bash
+#
+# checkmp4.sh <directory>
+#
+# Verifies all .mp4 files in the given directory ie checks if they are broken or not.
+# Prints "OK" or "Not OK" for each file.
+# Exit code is 0 if all files are OK, 1 if any are broken.
+
+dir="$1"
+
+if [ -z "$dir" ]; then
+  echo "Usage: $0 <directory>"
+  exit 2
+fi
+
+if [ ! -d "$dir" ]; then
+  echo "Not a directory: $dir"
+  exit 2
+fi
+
+bad=0
+
+# loop through mp4 files (non-recursive)
+# use `find "$dir" -type f -iname "*.mp4"` if you want recursive
+shopt -s nullglob
+for file in "$dir"/*.mp4 "$dir"/*.MP4; do
+  [ -e "$file" ] || continue
+
+  # --- Test 1: metadata sanity check ---
+  ffprobe -v error -select_streams v:0 -show_entries stream=width,height,duration \
+    -of csv=p=0 "$file" > /dev/null 2>&1
+  probe_status=$?
+
+  # --- Test 2: deep read/decode ---
+  ffmpeg -v error -xerror -i "$file" -f null - -nostats > /dev/null 2>&1
+  decode_status=$?
+
+  if [ $probe_status -eq 0 ] && [ $decode_status -eq 0 ]; then
+    echo "OK     $file"
+  else
+    echo "Not OK $file"
+    bad=1
+  fi
+done
+shopt -u nullglob
+
+exit $bad