fix(video2srt): format to two lines

.local/bin/video2srt

@@ -9,6 +9,8 @@ TRANSLATE="${TRANSLATE:-1}"
 SRC_LANG="${SRC_LANG:-auto}"
 FORCE="${FORCE:-0}"
 USE_VAD="${USE_VAD:-1}"
+MAX_LEN="${MAX_LEN:-84}"
+LINE_LEN="${LINE_LEN:-42}"
 OUTPUT=""
 
 usage() {
@@ -24,6 +26,8 @@ Options:
   -o, --output PATH  Output .srt path (single input only; default: <video>.srt)
   -f, --force        Overwrite existing .srt
       --no-vad       Disable Silero VAD pre-filtering (VAD reduces hallucination loops)
+      --max-len N    Max characters per SRT entry, 0 to disable (default: $MAX_LEN)
+      --line-len N   Max characters per visible line; longer entries wrap to 2 lines, 0 to disable (default: $LINE_LEN)
   -h, --help         Show this help
 
 Env overrides: WHISPER_DIR, WHISPER_MODEL, WHISPER_BIN
@@ -39,6 +43,8 @@ while [[ $# -gt 0 ]]; do
         -o|--output) OUTPUT="$2"; shift 2 ;;
         -f|--force) FORCE=1; shift ;;
         --no-vad) USE_VAD=0; shift ;;
+        --max-len) MAX_LEN="$2"; shift 2 ;;
+        --line-len) LINE_LEN="$2"; shift 2 ;;
         -h|--help) usage; exit 0 ;;
         --) shift; args+=("$@"); break ;;
         -*) echo "Unknown option: $1" >&2; usage >&2; exit 2 ;;
@@ -96,6 +102,9 @@ for video in "${args[@]}"; do
         -mc 0
     )
     [[ "$TRANSLATE" == "1" ]] && whisper_args+=(--translate)
+    if [[ "$MAX_LEN" -gt 0 ]]; then
+        whisper_args+=(--max-len "$MAX_LEN" --split-on-word)
+    fi
     if [[ "$USE_VAD" == "1" ]]; then
         if [[ -f "$VAD_MODEL" ]]; then
             whisper_args+=(--vad --vad-model "$VAD_MODEL")
@@ -107,6 +116,50 @@ for video in "${args[@]}"; do
 
     "$WHISPER_BIN" "${whisper_args[@]}"
 
+    if [[ "$LINE_LEN" -gt 0 ]]; then
+        python3 - "$srt" "$LINE_LEN" <<'PYEOF'
+import re, sys, pathlib
+
+path = pathlib.Path(sys.argv[1])
+max_line = int(sys.argv[2])
+
+def wrap(text, limit):
+    text = " ".join(text.split())
+    if len(text) <= limit:
+        return text
+    words = text.split(" ")
+    if len(words) < 2:
+        return text
+    best = None
+    best_score = None
+    cum = 0
+    for i, w in enumerate(words[:-1]):
+        cum += len(w) + (1 if i > 0 else 0)
+        top, bot = cum, len(text) - cum - 1
+        score = abs(bot - top)
+        if top > limit:
+            score += (top - limit) * 100
+        if bot > limit:
+            score += (bot - limit) * 100
+        if w.rstrip(",.!?:;") != w:
+            score -= 8
+        if best_score is None or score < best_score:
+            best_score, best = score, i
+    return " ".join(words[:best+1]) + "\n" + " ".join(words[best+1:])
+
+blocks = re.split(r"\n\n+", path.read_text(encoding="utf-8").strip())
+out = []
+for b in blocks:
+    lines = b.split("\n")
+    if len(lines) < 3:
+        out.append(b)
+        continue
+    head, body = lines[:2], " ".join(lines[2:])
+    out.append("\n".join(head + [wrap(body, max_line)]))
+path.write_text("\n\n".join(out) + "\n", encoding="utf-8")
+PYEOF
+    fi
+
     rm -f "$tmpwav"
     trap - EXIT
     echo "<< $srt"