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transcode.py: --replace mode

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Lukáš Kucharczyk
2025-12-04 16:31:54 +01:00
parent 22803754af
commit 0df2e757ab
1 changed files with 98 additions and 32 deletions
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transcode.py
+98 -32
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@@ -123,15 +123,39 @@ def get_ffmpeg_command(input_path, output_path):
]
return cmd
def transcode_file(input_file, output_file, skip_av1=True):
def transcode_file(input_file, output_file=None, skip_av1=True, replace_mode=False):
input_path = Path(input_file)
output_path = Path(output_file)
logging.debug(f"Processing request for: {input_path}")
logging.debug(f"Processing request: {input_path} -> {output_path}")
target_path = None
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')
# 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')
logging.debug(f"Input and output filenames match. Using temp file: {transcode_output_path}")
else:
transcode_output_path = target_path
else:
if not output_file:
logging.error("No output file specified and not in replace mode.")
return
target_path = Path(output_file)
transcode_output_path = target_path
# 1. Check existence logic
if output_path.exists():
logging.info(f"SKIP: Output file already exists: {output_path.name}")
logging.debug(f"Final transcode target: {transcode_output_path}")
# 1. Check existence logic (Skip if target exists, unless we are using a temp file for replacement)
# 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}")
return
# 2. Check if file is ready (simple size stability check)
@@ -167,9 +191,11 @@ def transcode_file(input_file, output_file, skip_av1=True):
ffmpeg_log_file = ffmpeg_logs_dir / f"{input_path.name}.log"
logging.info(f"START: Transcoding {input_path.name}")
if replace_mode:
logging.info(f" Outputting to temporary file: {input_path.name}")
logging.info(f" FFmpeg details logging to: {ffmpeg_log_file}")
cmd = get_ffmpeg_command(input_path, output_path)
cmd = get_ffmpeg_command(input_path, transcode_output_path)
logging.debug(f"Executing FFmpeg command: {' '.join(cmd)}")
try:
@@ -182,7 +208,24 @@ def transcode_file(input_file, output_file, skip_av1=True):
result = subprocess.run(cmd, stdout=f_log, stderr=subprocess.STDOUT, text=True)
if result.returncode == 0:
logging.info(f"DONE: Successfully created {output_path.name}")
logging.info(f"DONE: Successfully created {transcode_output_path.name}")
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.")
except OSError as e:
logging.error(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}")
except OSError as e:
logging.error(f"Failed to delete original file: {e}")
else:
logging.error(f"FFmpeg failed for {input_path.name}. See log at {ffmpeg_log_file}")
@@ -193,9 +236,10 @@ def transcode_file(input_file, output_file, skip_av1=True):
sys.exit(0)
class NewFileHandler(FileSystemEventHandler):
def __init__(self, output_dir, skip_av1=True):
self.output_dir = Path(output_dir)
def __init__(self, output_dir=None, skip_av1=True, replace_mode=False):
self.output_dir = Path(output_dir) if output_dir else None
self.skip_av1 = skip_av1
self.replace_mode = replace_mode
def on_created(self, event):
if event.is_directory:
@@ -217,10 +261,12 @@ class NewFileHandler(FileSystemEventHandler):
logging.debug(f"Ignored non-video file: {input_path.name}")
return
new_filename = input_path.stem + ".mp4"
output_path = self.output_dir / new_filename
output_path = None
if not self.replace_mode and self.output_dir:
new_filename = input_path.stem + ".mp4"
output_path = self.output_dir / new_filename
transcode_file(input_path, output_path, skip_av1=self.skip_av1)
transcode_file(input_path, output_path, skip_av1=self.skip_av1, replace_mode=self.replace_mode)
def main():
setup_logging()
@@ -232,20 +278,37 @@ def main():
parser.add_argument("--watch-dir", type=str, help="Directory to monitor for new files")
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("--replace", action="store_true", help="Replace original files with transcoded versions (Ignores --output-dir)")
# Set defaults from config
# We accept both hyphenated and underscore keys from JSON for user convenience
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
parser.set_defaults(
watch_dir=default_watch,
output_dir=default_output,
no_skip_av1=default_no_skip
no_skip_av1=default_no_skip,
replace=default_replace
)
args = parser.parse_args()
skip_av1 = not args.no_skip_av1
# --- Initial Policy Logging ---
if args.replace:
logging.info("Policy: REPLACE mode enabled. 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.")
if args.no_skip_av1:
logging.info("Policy: Force transcoding all files (including AV1).")
else:
logging.info("Policy: Skipping files that are already AV1.")
# --- Mode 1: Single File ---
if args.input:
@@ -254,42 +317,45 @@ def main():
logging.critical(f"Input file '{args.input}' not found.")
sys.exit(1)
if args.output_dir:
out_dir = Path(args.output_dir)
out_dir.mkdir(parents=True, exist_ok=True)
output_path = out_dir / (input_path.stem + ".mp4")
else:
output_path = input_path.parent / (input_path.stem + "_av1.mp4")
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 / (input_path.stem + ".mp4")
else:
output_path = input_path.parent / (input_path.stem + "_av1.mp4")
transcode_file(input_path, output_path, skip_av1=not args.no_skip_av1)
transcode_file(input_path, output_path, skip_av1=skip_av1, replace_mode=args.replace)
return
# --- Mode 2: Watch Directory ---
if args.watch_dir:
if not args.output_dir:
# 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("Either specify --output-dir OR enable --replace mode.")
sys.exit(1)
watch_dir = Path(args.watch_dir)
output_dir = Path(args.output_dir)
if not watch_dir.exists():
logging.critical(f"Watch directory '{watch_dir}' does not exist.")
sys.exit(1)
output_dir.mkdir(parents=True, exist_ok=True)
logging.info(f"Monitoring {watch_dir}...")
logging.info(f"Outputting to {output_dir}")
if args.no_skip_av1:
logging.info("Policy: Force transcoding all files (including AV1).")
output_dir_path = None
if not args.replace:
output_dir_path = Path(args.output_dir)
output_dir_path.mkdir(parents=True, exist_ok=True)
logging.info(f"Outputting to {output_dir_path}")
else:
logging.info("Policy: Skipping files that are already AV1.")
logging.info("Outputting in-place (replacing originals).")
logging.info("Press Ctrl+C to stop.")
event_handler = NewFileHandler(output_dir, skip_av1=not args.no_skip_av1)
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)
observer.start()