gottem

src-lib/testdata/poc.sh

@@ -0,0 +1,58 @@
+#! /bin/bash
+
+py="$(cat <<EOF
+from sys import stdin; lines = [i.strip() for i in stdin.readlines()];
+def keyword(line):
+  return "keep" if "keep" in line else "drop"
+somelines = lines[:1]
+for i in range(1, len(lines)):
+  if keyword(somelines[-1]) != keyword(lines[i]):
+    somelines.append(lines[i-1])
+    somelines.append(lines[i])
+somelines = [(keyword(i), i.split("pts_time:")[1].split()[0]) for i in somelines]
+
+# just the keeps
+somelines = [i for i in somelines[2:] if i[0] == "keep"]
+
+# translate to floats
+drops = []
+for i in range(0, len(somelines), 2):
+   start = float(somelines[i][1])
+   if len(somelines) > i+1:
+      stop = float(somelines[i+1][1])
+      if stop - start > 1:
+         drops.append((start, stop))
+   #else:
+   #   drops.append((start, "inf"))
+
+# extend around
+for i in range(len(drops)):
+   drops[i] = (drops[i][0] - 1.0, drops[i][1] + 1.0)
+
+# combine near
+for i in range(len(drops)-1, 0, -1):
+   first_start, first_stop = drops[i-1]
+   secnd_start, secnd_stop = drops[i]
+   if secnd_start - first_stop < 5:
+      drops = drops[:i-1] + [(first_start, secnd_stop)] + drops[i+1:]
+
+# output
+print("\n".join([
+   f'{i[0]:.2f},{i[1]-i[0]:.2f}' for i in drops
+]))
+EOF
+)"
+
+d=$(mktemp -d)
+echo d=$d >&2
+for span in $(
+   ffmpeg -i $f -vf mpdecimate -loglevel debug -f null - 2>&1 \
+   | grep Parsed_mpdecimate_0 \
+   | grep -E ' (keep|drop) ' \
+   | python3 -c "$py"
+); do
+   n=$((n+1))
+   ffmpeg -y -ss ${span%,*} -i "$f" -t ${span#*,} "$d/$(printf "%05d" $(ls "$d" | wc -l)).${f##*.}"
+done
+ls $d
+echo rm -rf "$d"