transcode.py: add logging, write stats, recursive mode, simplify

arguments

transcode.py

@@ -6,24 +6,40 @@
 # ]
 # ///
 import argparse
-import time
+import csv
-import sys
+import datetime
-import subprocess
-import os
-import logging
 import json
+import logging
+import os
+import re
+import subprocess
+import sys
+import time
 from pathlib import Path
-from watchdog.observers import Observer
+
 from watchdog.events import FileSystemEventHandler
+from watchdog.observers import Observer
 
 # Supported video extensions to monitor
-VIDEO_EXTENSIONS = {'.mkv', '.mp4', '.avi', '.mov', '.wmv', '.flv', '.webm', '.m4v', '.ts'}
+VIDEO_EXTENSIONS = {
+    ".mkv",
+    ".mp4",
+    ".avi",
+    ".mov",
+    ".wmv",
+    ".flv",
+    ".webm",
+    ".m4v",
+    ".ts",
+}
+
 
 def get_config_dir():
     """Returns the main configuration directory path."""
-    xdg_config = os.environ.get('XDG_CONFIG_HOME', os.path.expanduser('~/.config'))
+    xdg_config = os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config"))
     return Path(xdg_config) / "transcoder"
 
+
 def setup_logging():
     """
     Sets up logging to both console (INFO) and file (DEBUG/Verbose).
@@ -35,10 +51,10 @@ def setup_logging():
 
     # Create logger
     logger = logging.getLogger()
-    logger.setLevel(logging.DEBUG) # Capture everything
+    logger.setLevel(logging.DEBUG)  # Capture everything
 
     # formatter
-    formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
+    formatter = logging.Formatter("%(asctime)s - %(levelname)s - %(message)s")
 
     # File Handler (Verbose)
     file_handler = logging.FileHandler(log_file)
@@ -49,11 +65,12 @@ def setup_logging():
     # Console Handler (Concise)
     console_handler = logging.StreamHandler(sys.stdout)
     console_handler.setLevel(logging.INFO)
-    console_handler.setFormatter(logging.Formatter('[%(levelname)s] %(message)s'))
+    console_handler.setFormatter(logging.Formatter("[%(levelname)s] %(message)s"))
     logger.addHandler(console_handler)
 
     logging.info(f"Logging started. Verbose logs at: {log_file}")
 
+
 def load_config():
     """
     Loads configuration from config.json in the config directory.
@@ -64,7 +81,7 @@ def load_config():
         return {}
 
     try:
-        with open(config_path, 'r') as f:
+        with open(config_path, "r") as f:
             config = json.load(f)
             logging.debug(f"Loaded config from {config_path}: {config}")
             return config
@@ -72,58 +89,118 @@ def load_config():
         logging.error(f"Failed to load config file: {e}")
         return {}
 
-def get_video_codec(input_path):
+
+def _run_ffprobe(cmd):
     """
-    Uses ffprobe to determine the codec of the first video stream.
+    Helper function to run ffprobe commands with consistent error handling.
-    Returns the codec name (e.g., 'av1', 'h264', 'hevc') or None if detection fails.
     """
-    cmd = [
+    cmd_base = [
         "ffprobe",
-        "-v", "error",
+        "-v",
-        "-select_streams", "v:0",
+        "quiet",
-        "-show_entries", "stream=codec_name",
+        "-print_format",
-        "-of", "default=noprint_wrappers=1:nokey=1",
+        "json",
-        str(input_path)
+        "-show_streams",
+        "-select_streams",
+        "v:0",
     ]
     try:
-        # We don't log this subprocess call to avoid spamming debug logs, 
+        result = subprocess.run(
-        # unless it fails.
+            cmd_base + cmd, capture_output=True, text=True, check=True
-        result = subprocess.run(cmd, capture_output=True, text=True, check=True)
+        )
-        codec = result.stdout.strip()
+        if result.stdout.strip():
-        logging.debug(f"Detected codec for {input_path.name}: {codec}")
+            return json.loads(result.stdout.strip())
-        return codec
+        else:
+            return json.loads("{}")
     except subprocess.CalledProcessError as e:
-        logging.warning(f"Failed to probe codec for {input_path.name}: {e}")
+        logging.warning(f"ffprobe command failed: {e}")
         return None
     except FileNotFoundError:
         logging.error("ffprobe not found. Please ensure ffmpeg/ffprobe is installed.")
         return None
 
+
+def get_video_codec(file_path):
+    """
+    Uses ffprobe to determine the codec of the first video stream.
+    Returns the codec name (e.g., 'av1', 'h264', 'hevc') or None if detection fails.
+    """
+    try:
+        # We don't log this subprocess call to avoid spamming debug logs,
+        # unless it fails.
+        ffprobe_data = _run_ffprobe([str(file_path)])
+        if ffprobe_data:
+            codec = ffprobe_data["streams"][0]["codec_name"]
+            logging.debug(f"Detected codec for {file_path}: {codec}")
+            return codec
+        return None
+    except Exception as e:
+        logging.warning(f"Failed to probe codec for {file_path}: {e}")
+        return None
+
+
+def get_video_duration(file_path):
+    """
+    Get video duration using ffprobe.
+    Returns duration in seconds as a float, or 0.0 if error occurs.
+    """
+    try:
+        ffprobe_data = _run_ffprobe([str(file_path)])
+        if ffprobe_data:
+            duration = float(ffprobe_data["streams"][0]["duration"])
+            # format to minutes with "m" suffix
+            duration_formatted = f"{duration / 60:.0f}m"
+            logging.debug(f"Detected duration for {file_path}: {duration_formatted}")
+            return duration_formatted
+        return "0m"
+    except (ValueError, Exception) as e:
+        logging.warning(f"Could not get duration for {file_path}: {e}")
+        return "0m"
+
+
+def leftalign(str):
+    return 5 * " " + str
+
+
 def get_ffmpeg_command(input_path, output_path):
     """
     Constructs the FFmpeg command based on the Handbrake preset requirements.
     """
     cmd = [
         "ffmpeg",
-        "-n",                  # Never overwrite output files
+        "-n",  # Never overwrite output files
-        "-i", str(input_path), # Input file
+        "-i",
-        "-c:v", "av1_nvenc",   # Video Encoder
+        str(input_path),  # Input file
-        "-pix_fmt", "p010le",  # 10-bit color
+        "-c:v",
-        "-preset", "p4",       # Medium preset
+        "av1_nvenc",  # Video Encoder
-        "-rc", "vbr",          # Variable Bit Rate control
+        "-pix_fmt",
-        "-cq", "35",           # Constant Quality factor
+        "p010le",  # 10-bit color
+        "-preset",
+        "p4",  # Medium preset
+        "-rc",
+        "vbr",  # Variable Bit Rate control
+        "-cq",
+        "35",  # Constant Quality factor
         # Filter chain: Deinterlace -> Scale down if >1080p -> Cap FPS at 30
-        "-vf", "yadif,scale='min(1920,iw)':-2,fps=30",
+        "-vf",
-        "-c:a", "aac",         # Audio Encoder
+        "yadif,scale='min(1920,iw)':-2,fps=30",
-        "-b:a", "160k",        # Audio Bitrate
+        "-c:a",
-        "-ac", "2",            # Audio Channels (Stereo)
+        "aac",  # Audio Encoder
-        "-color_range", "tv",  # Limited color range
+        "-b:a",
-        "-movflags", "+faststart", # Web optimization
+        "160k",  # Audio Bitrate
-        str(output_path)       # Output file
+        "-ac",
+        "2",  # Audio Channels (Stereo)
+        "-color_range",
+        "tv",  # Limited color range
+        "-movflags",
+        "+faststart",  # Web optimization
+        str(output_path),  # Output file
     ]
     return cmd
 
+
 def transcode_file(input_file, output_file=None, skip_av1=True, replace_mode=False):
+    exit_after_next = False
     input_path = Path(input_file)
 
     logging.debug(f"Processing request for: {input_path}")
@@ -132,14 +209,15 @@ def transcode_file(input_file, output_file=None, skip_av1=True, replace_mode=Fal
     use_temp_file = False
 
     if replace_mode:
-        logging.warning("Policy: --replace is enabled. --output-dir is ignored. Transcoding in-place.")
+        target_path = input_path.with_suffix(".mp4")
-        target_path = input_path.with_suffix('.mp4')
 
         # If the target is the same as input (e.g. input is already .mp4), use a temp file
         if target_path == input_path:
             use_temp_file = True
-            transcode_output_path = input_path.with_suffix('.tmp.mp4')
+            transcode_output_path = input_path.with_suffix(".tmp.mp4")
-            logging.debug(f"Input and output filenames match. Using temp file: {transcode_output_path}")
+            logging.debug(
+                f"Input and output filenames match. Using temp file: {transcode_output_path}"
+            )
         else:
             transcode_output_path = target_path
     else:
@@ -155,16 +233,20 @@ def transcode_file(input_file, output_file=None, skip_av1=True, replace_mode=Fal
     # If replace_mode is True and extensions differ, we still want to respect -n (no overwrite)
     # for the destination file if it already exists.
     if transcode_output_path.exists():
-        logging.info(f"SKIP: Output file already exists: {transcode_output_path.name}")
+        logging.info(
+            leftalign(f"SKIP: Output file already exists: {transcode_output_path}")
+        )
         return
 
     # 2. Check if file is ready (simple size stability check)
-    logging.info(f"WAIT: Ensuring file is ready: {input_path.name}...")
+    logging.info(leftalign("WAIT: Ensuring file is ready..."))
     try:
         historical_size = -1
         while True:
             current_size = input_path.stat().st_size
-            logging.debug(f"File stability check - Current: {current_size}, Previous: {historical_size}")
+            logging.debug(
+                f"File stability check - Current: {current_size}, Previous: {historical_size}"
+            )
 
             if current_size == historical_size and current_size > 0:
                 logging.debug("File size stable. Proceeding.")
@@ -173,27 +255,32 @@ def transcode_file(input_file, output_file=None, skip_av1=True, replace_mode=Fal
             historical_size = current_size
             time.sleep(2)
     except FileNotFoundError:
-        logging.warning(f"File vanished during checks: {input_path.name}")
+        logging.warning(f"File vanished during checks: {input_path}")
         return
 
     # 3. Check Codec (Optional Skip)
     if skip_av1:
         codec = get_video_codec(input_path)
-        if codec == 'av1':
+        if codec == "av1":
-            logging.info(f"SKIP: Input file is already AV1: {input_path.name}")
+            logging.info(leftalign(f"SKIP: Input file is already AV1: {input_path}"))
             return
+        else:
+            logging.info(leftalign(f"Codec is {codec}"))
 
     # Prepare individual FFmpeg log file
     ffmpeg_logs_dir = get_config_dir() / "ffmpeg_logs"
     ffmpeg_logs_dir.mkdir(parents=True, exist_ok=True)
 
-    # We append .log to the full filename to avoid collisions (e.g. video.mp4.log)
+    logfile_timestamp = datetime.datetime.now().strftime("%Y-%m-%d-%H:%M:%S")
-    ffmpeg_log_file = ffmpeg_logs_dir / f"{input_path.name}.log"
+    # We also append .log to the full filename to avoid collisions (e.g. video.mp4.log)
+    ffmpeg_log_file = ffmpeg_logs_dir / f"{logfile_timestamp}_{input_path.name}.log"
 
-    logging.info(f"START: Transcoding {input_path.name}")
+    logging.info(leftalign("START: Transcoding..."))
     if replace_mode:
-        logging.info(f"       Outputting to temporary file: {input_path.name}")
+        logging.info(
-    logging.info(f"       FFmpeg details logging to: {ffmpeg_log_file}")
+            leftalign(f"Outputting to temporary file: {transcode_output_path}")
+        )
+    logging.info(leftalign(f"FFmpeg details logging to: {ffmpeg_log_file}"))
 
     cmd = get_ffmpeg_command(input_path, transcode_output_path)
     logging.debug(f"Executing FFmpeg command: {' '.join(cmd)}")
@@ -204,36 +291,139 @@ def transcode_file(input_file, output_file=None, skip_av1=True, replace_mode=Fal
             f_log.write(f"COMMAND: {' '.join(cmd)}\n\n")
             f_log.flush()
 
-            # Run FFmpeg, redirecting both stdout and stderr to the individual log file
+            # Run FFmpeg and process output in real-time with timestamps
-            result = subprocess.run(cmd, stdout=f_log, stderr=subprocess.STDOUT, text=True)
+            process = subprocess.Popen(
+                cmd,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.STDOUT,
+                text=True,
+                bufsize=1,
+            )
 
-        if result.returncode == 0:
+            regex_elapsed = re.compile(r"elapsed=([0-9:.]+)")
-            logging.info(f"DONE: Successfully created {transcode_output_path.name}")
+            transcoding_duration = None
+            # Write FFmpeg output with timestamps as it's generated
+            try:
+                while True:
+                    output = process.stdout.readline()  # pyright: ignore[reportOptionalMemberAccess]
+                    if output == "" and process.poll() is not None:
+                        break
+                    if output:
+                        # capture the elapsed time for later use, only keep the last occurence
+                        if regex_result := re.findall(regex_elapsed, output):
+                            transcoding_duration = regex_result[0]
+
+                        timestamp = datetime.datetime.now().strftime(
+                            "%Y-%m-%d %H:%M:%S"
+                        )
+                        f_log.write(f"[{timestamp}] {output.rstrip()}\n")
+                        f_log.flush()
+
+                # Wait for process to complete and get return code
+                result = process.wait()
+            except Exception as e:
+                # Ensure we clean up temporary files on error
+                if replace_mode and use_temp_file and transcode_output_path.exists():
+                    try:
+                        transcode_output_path.unlink()
+                    except Exception:
+                        pass
+                raise e
+
+        if result == 0:
+            logging.info(
+                leftalign(f"DONE: Successfully transcoded to {transcode_output_path}")
+            )
+
+            transcoding_duration = transcode_output_path
+            logging.debug(f"Transcoding duration was {transcoding_duration}.")
+
+            original_codec = get_video_codec(input_path)
+            transcoded_codec = get_video_codec(transcode_output_path)
+            video_duration = get_video_duration(input_path)
+            original_size = f"{input_path.stat().st_size / (1024 * 1024):.0f}MB"
+            transcoded_size = (
+                f"{transcode_output_path.stat().st_size / (1024 * 1024):.0f}MB"
+            )
+
+            logging.debug(f"Original file size: {original_size}")
+            logging.debug(f"Transcoded file size: {transcoded_size}")
+
+            # Write to stats CSV file
+            stats_file = get_config_dir() / "stats.csv"
+            file_exists = stats_file.exists()
+
+            with open(stats_file, "a", newline="", encoding="utf-8") as csvfile:
+                writer = csv.writer(csvfile)
+
+                # Write header if file doesn't exist
+                if not file_exists:
+                    writer.writerow(
+                        [
+                            "filename",
+                            "original_size",
+                            "transcoded_size",
+                            "original_codec",
+                            "transcoded_codec",
+                            "video_duration",
+                            "transcoding_duration",
+                        ]
+                    )
+
+                writer.writerow(
+                    [
+                        input_path.name,
+                        original_size,
+                        transcoded_size,
+                        original_codec,
+                        transcoded_codec,
+                        video_duration,
+                        transcoding_duration,
+                    ]
+                )
 
             if replace_mode:
                 if use_temp_file:
                     # Rename temp file to overwrite original
                     try:
                         transcode_output_path.replace(input_path)
-                        logging.info(f"REPLACE: Overwrote original file {input_path.name} with new version.")
+                        logging.info(leftalign("REPLACE: Overwrote original file."))
                     except OSError as e:
-                        logging.error(f"Failed to replace original file: {e}")
+                        logging.error(
+                            leftalign(f"Failed to replace original file: {e}")
+                        )
                 else:
                     # Different extensions (e.g. mkv -> mp4). Delete original.
                     try:
                         input_path.unlink()
-                        logging.info(f"DELETE: Removed original file {input_path.name}")
+                        logging.info(leftalign("DELETE: Removed original file."))
                     except OSError as e:
-                        logging.error(f"Failed to delete original file: {e}")
+                        logging.error(leftalign(f"Failed to delete original file: {e}"))
 
         else:
-            logging.error(f"FFmpeg failed for {input_path.name}. See log at {ffmpeg_log_file}")
+            logging.error(
+                f"FFmpeg failed for {input_path}. See log at {ffmpeg_log_file}"
+            )
+            if replace_mode and use_temp_file and transcode_output_path.exists():
+                try:
+                    transcode_output_path.unlink()
+                except Exception:
+                    pass
+
+        if exit_after_next:
+            logging.info("Quitting early due to user interrupt.")
+            sys.exit(0)
 
     except Exception as e:
-        logging.exception(f"Unexpected error during transcoding of {input_path.name}")
+        logging.exception(f"Unexpected error during transcoding of {input_path}: {e}")
     except KeyboardInterrupt:
-        logging.warning("Interrupted by user during transcoding.")
+        logging.info(
-        sys.exit(0)
+            "Will quit after the current file is transcoded. Press Ctrl+C again to force quit."
+        )
+        if exit_after_next:
+            sys.exit(0)
+        exit_after_next = True
+
 
 class NewFileHandler(FileSystemEventHandler):
     def __init__(self, output_dir=None, skip_av1=True, replace_mode=False):
@@ -258,7 +448,7 @@ class NewFileHandler(FileSystemEventHandler):
 
         # Filter for video extensions
         if input_path.suffix.lower() not in VIDEO_EXTENSIONS:
-            logging.debug(f"Ignored non-video file: {input_path.name}")
+            logging.debug(f"Ignored non-video file: {input_path}")
             return
 
         output_path = None
@@ -266,7 +456,13 @@ class NewFileHandler(FileSystemEventHandler):
             new_filename = input_path.stem + ".mp4"
             output_path = self.output_dir / new_filename
 
-        transcode_file(input_path, output_path, skip_av1=self.skip_av1, replace_mode=self.replace_mode)
+        transcode_file(
+            input_path,
+            output_path,
+            skip_av1=self.skip_av1,
+            replace_mode=self.replace_mode,
+        )
+
 
 def main():
     setup_logging()
@@ -274,24 +470,40 @@ def main():
 
     parser = argparse.ArgumentParser(description="Nvidia AV1 Transcoder & Watcher")
 
-    parser.add_argument("--input", type=str, help="Single file to transcode (Overrides watch mode)")
+    parser.add_argument("--input", type=str, help="File or directory to transcode")
-    parser.add_argument("--watch-dir", type=str, help="Directory to monitor for new files")
+    parser.add_argument(
+        "--watch", action="store_true", help="Enable filesystem watching mode"
+    )
     parser.add_argument("--output-dir", type=str, help="Output directory")
-    parser.add_argument("--no-skip-av1", action="store_true", help="Force transcoding even if input is already AV1")
+    parser.add_argument(
-    parser.add_argument("--replace", action="store_true", help="Replace original files with transcoded versions (Ignores --output-dir)")
+        "--no-skip-av1",
+        action="store_true",
+        help="Force transcoding even if input is already AV1",
+    )
+    parser.add_argument(
+        "--replace",
+        action="store_true",
+        help="Replace original files with transcoded versions (Ignores --output-dir)",
+    )
+    parser.add_argument(
+        "--recursive",
+        action="store_true",
+        help="Recursively scan directories for input files",
+    )
 
     # Set defaults from config
-    # We accept both hyphenated and underscore keys from JSON for user convenience
+    default_watch = config.get("watch") or False
-    default_watch = config.get("watch-dir") or config.get("watch_dir")
     default_output = config.get("output-dir") or config.get("output_dir")
     default_no_skip = config.get("no-skip-av1") or config.get("no_skip_av1") or False
     default_replace = config.get("replace") or False
+    default_recursive = config.get("recursive") or False
 
     parser.set_defaults(
-        watch_dir=default_watch,
+        watch=default_watch,
         output_dir=default_output,
         no_skip_av1=default_no_skip,
-        replace=default_replace
+        replace=default_replace,
+        recursive=default_recursive,
     )
 
     args = parser.parse_args()
@@ -300,15 +512,16 @@ def main():
 
     # --- Initial Policy Logging ---
     if args.replace:
-        logging.info("Policy: REPLACE mode enabled. Original files will be overwritten/deleted.")
+        logging.info("POLICY: --replace: Original files will be overwritten/deleted.")
         if args.output_dir:
-            logging.warning("Warning: --output-dir is specified but will be IGNORED due to --replace mode.")
+            logging.warning(
+                "--output-dir is specified but will be IGNORED due to --replace mode."
+            )
 
     if args.no_skip_av1:
-        logging.info("Policy: Force transcoding all files (including AV1).")
+        logging.info("POLICY: --no-skip-av1: Do not skip AV1 files.")
     else:
-        logging.info("Policy: Skipping files that are already AV1.")
+        logging.info("POLICY: Skip AV1 files. Change with --no-skip-av1.")
-
 
     # --- Mode 1: Single File ---
     if args.input:
@@ -317,6 +530,39 @@ def main():
             logging.critical(f"Input file '{args.input}' not found.")
             sys.exit(1)
 
+        # If input is a directory, process accordingly
+        if input_path.is_dir():
+            if args.recursive:
+                # Process directory recursively
+                process_recursive_directory(input_path, args, skip_av1)
+                return
+            else:
+                # Process directory non-recursively (all files in this directory only)
+                logging.info(f"Processing directory non-recursively: {input_path}")
+                for video_file in input_path.iterdir():
+                    if (
+                        video_file.is_file()
+                        and video_file.suffix.lower() in VIDEO_EXTENSIONS
+                    ):
+                        logging.info(f"FILE: {video_file}")
+                        output_path = None
+                        if not args.replace:
+                            if args.output_dir:
+                                out_dir = Path(args.output_dir)
+                                out_dir.mkdir(parents=True, exist_ok=True)
+                                output_path = out_dir / (video_file.stem + ".mp4")
+                            else:
+                                output_path = video_file.parent / (
+                                    video_file.stem + "_av1.mp4"
+                                )
+                        transcode_file(
+                            video_file,
+                            output_path,
+                            skip_av1=skip_av1,
+                            replace_mode=args.replace,
+                        )
+                return
+
         output_path = None
         if not args.replace:
             if args.output_dir:
@@ -326,18 +572,27 @@ def main():
             else:
                 output_path = input_path.parent / (input_path.stem + "_av1.mp4")
 
-        transcode_file(input_path, output_path, skip_av1=skip_av1, replace_mode=args.replace)
+        transcode_file(
+            input_path, output_path, skip_av1=skip_av1, replace_mode=args.replace
+        )
         return
 
     # --- Mode 2: Watch Directory ---
-    if args.watch_dir:
+    if args.watch:
         # If replace mode is OFF, output-dir is required.
         if not args.replace and not args.output_dir:
-            logging.critical("Output directory is not specified in CLI (--output-dir) or Config.")
+            logging.critical(
+                "Output directory is not specified in CLI (--output-dir) or Config."
+            )
             logging.critical("Either specify --output-dir OR enable --replace mode.")
             sys.exit(1)
 
-        watch_dir = Path(args.watch_dir)
+        # Use --input as the watch directory if provided, otherwise default to current directory
+        if args.input:
+            watch_dir = Path(args.input)
+        else:
+            watch_dir = Path(".")
+            logging.info("No watch directory specified, monitoring current directory.")
 
         if not watch_dir.exists():
             logging.critical(f"Watch directory '{watch_dir}' does not exist.")
@@ -355,9 +610,13 @@ def main():
 
         logging.info("Press Ctrl+C to stop.")
 
-        event_handler = NewFileHandler(output_dir_path, skip_av1=skip_av1, replace_mode=args.replace)
+        event_handler = NewFileHandler(
+            output_dir_path, skip_av1=skip_av1, replace_mode=args.replace
+        )
         observer = Observer()
-        observer.schedule(event_handler, str(watch_dir), recursive=False)
+        # Use recursive monitoring if --recursive is specified
+        recursive_watch = args.recursive
+        observer.schedule(event_handler, str(watch_dir), recursive=recursive_watch)
         observer.start()
 
         try:
@@ -369,8 +628,33 @@ def main():
         observer.join()
     else:
         logging.critical("No operation mode selected.")
-        logging.critical("Please provide --input for single file OR configure watch-dir via CLI or Config.")
+        logging.critical(
+            "Please provide --input for single file OR enable --watch mode."
+        )
         sys.exit(1)
 
+
+def process_recursive_directory(input_path, args, skip_av1):
+    """Process all video files in a directory recursively."""
+    logging.info(f"Scanning directory recursively for video files: {input_path}")
+    for video_file in input_path.rglob("*"):
+        if video_file.is_file() and video_file.suffix.lower() in VIDEO_EXTENSIONS:
+            logging.info(f"FILE: {video_file}")
+            output_path = None
+            if not args.replace:
+                if args.output_dir:
+                    out_dir = Path(args.output_dir)
+                    out_dir.mkdir(parents=True, exist_ok=True)
+                    output_path = out_dir / (video_file.stem + ".mp4")
+                else:
+                    output_path = video_file.parent / (video_file.stem + "_av1.mp4")
+            transcode_file(
+                video_file,
+                output_path,
+                skip_av1=skip_av1,
+                replace_mode=args.replace,
+            )
+
+
 if __name__ == "__main__":
     main()