peter
c4942eb590
- run_ffmpeg stops the process from ONE exit path (`except BaseException`), so an exception out of on_progress (a DB write) can no longer orphan a live ffmpeg after a 10s join on its pipes; _stop is now a no-op on a dead process - both run_ffmpeg callbacks are throttled to ~1s (they were a DB round-trip per output line: ~10^5 queries on a long re-encode), mirroring the download hook - volume arithmetic extracted to lib/playerVolume with unit tests; a corrupt level now falls back to the LAST GOOD one instead of full blast, and the sanitising happens where the stored value enters - RSS is back to two except clauses (the shared tail already sits after the try) - new tests: callback-exception cleanup, the two throttles; the fake Popen grew poll() and its wait count is now asserted Mutation-checked: each new group goes red when its fix is reverted.
550 lines
23 KiB
Python
550 lines
23 KiB
Python
"""Video editor (phase 2): per-user trim/crop derivatives via ffmpeg.
|
||
|
||
An edit derives a NEW per-user clip from an already-downloaded ready asset. It is never shared-
|
||
cached across users (the cache key embeds the user id), so it fully counts against the owner's
|
||
quota — but it still rides the same `MediaAsset`/`DownloadJob`/worker machinery as a download,
|
||
with the worker branching on the asset's `source_kind` to run ffmpeg instead of yt-dlp.
|
||
|
||
* trim, fast → stream copy (`-c copy`), instant, no quality loss, cuts SNAP to keyframes
|
||
(the in/out point can be off by a second or two)
|
||
* trim, accurate → re-encode (libx264 + aac), frame-accurate; cost scales with CLIP length
|
||
(the `-ss` seeks first), so a short clip is cheap even from a long source
|
||
* crop (± trim) → always re-encode (a filter can't be stream-copied), frame-accurate
|
||
|
||
`edit_spec = {trim?: {start_s, end_s}, crop?: {x, y, w, h}, accurate?: bool}`. `accurate` is the
|
||
per-edit user choice for a trim-only cut (ignored when a crop forces a re-encode anyway). `split`
|
||
is a frontend concept: the
|
||
UI fans a split out into N trim jobs, so there is one output file per job here.
|
||
|
||
Also builds the editor **filmstrip** — a single tiled sprite of the source video used as a visual
|
||
scrub track. Cached on the source asset's `storyboard_path` (reserved in phase 1) and reusable
|
||
for a player hover-preview later.
|
||
"""
|
||
import hashlib
|
||
import json
|
||
import logging
|
||
import math
|
||
import queue
|
||
import subprocess
|
||
import threading
|
||
import time
|
||
from pathlib import Path
|
||
|
||
log = logging.getLogger("siftlode.edit")
|
||
|
||
|
||
class EditAborted(Exception):
|
||
"""Raised by run_ffmpeg when the job was paused/canceled mid-encode."""
|
||
|
||
|
||
# --- edit spec ------------------------------------------------------------------------------
|
||
|
||
def normalize_edit_spec(spec: dict | None) -> dict:
|
||
"""Canonicalize a raw edit spec: clamp/round trim, coerce crop to ints, drop empties.
|
||
|
||
The result is what gets hashed (so two equivalent specs share a cache row) and stored."""
|
||
spec = spec or {}
|
||
out: dict = {}
|
||
|
||
# Crop applies to both a single trim and a multi-segment join.
|
||
crop = spec.get("crop") or {}
|
||
if crop:
|
||
try:
|
||
c = {k: int(round(float(crop[k]))) for k in ("x", "y", "w", "h")}
|
||
except (KeyError, TypeError, ValueError):
|
||
c = None
|
||
if c and c["w"] > 0 and c["h"] > 0 and c["x"] >= 0 and c["y"] >= 0:
|
||
out["crop"] = c
|
||
|
||
# Multi-segment JOIN (cut-list → one concatenated file). Takes precedence over `trim`.
|
||
segs = spec.get("segments")
|
||
if isinstance(segs, list) and segs:
|
||
norm: list[dict] = []
|
||
for s in segs:
|
||
try:
|
||
st = max(0.0, float((s or {}).get("start_s") or 0.0))
|
||
end_raw = (s or {}).get("end_s")
|
||
if end_raw is None:
|
||
continue
|
||
en = float(end_raw)
|
||
except (TypeError, ValueError):
|
||
continue
|
||
if en > st:
|
||
norm.append({"start_s": round(st, 3), "end_s": round(en, 3)})
|
||
norm.sort(key=lambda x: x["start_s"])
|
||
if norm:
|
||
out["segments"] = norm
|
||
# A join always chooses a codec path: accurate=filter-concat re-encode,
|
||
# fast=demuxer-concat stream-copy (keyframe-snapped).
|
||
out["accurate"] = bool(spec.get("accurate", True))
|
||
return out
|
||
|
||
# Single TRIM (one output file; the frontend fans a "separate" split out into N of these).
|
||
trim = spec.get("trim") or {}
|
||
if trim:
|
||
# Guard the numeric coercion like the crop/segments branches do — a malformed value must
|
||
# drop the trim (→ empty spec → 400 EditError), not raise an unhandled 500.
|
||
try:
|
||
start = max(0.0, float(trim.get("start_s") or 0.0))
|
||
end_raw = trim.get("end_s")
|
||
end = float(end_raw) if end_raw is not None else None
|
||
except (TypeError, ValueError):
|
||
start, end = 0.0, None
|
||
t: dict = {"start_s": round(start, 3)}
|
||
if end is not None and end > start:
|
||
t["end_s"] = round(end, 3)
|
||
# A trim with only a start (open-ended) is valid (cut to the end).
|
||
if t.get("start_s") or "end_s" in t:
|
||
out["trim"] = t
|
||
|
||
# `accurate` only changes behaviour for a trim-only cut (a crop always re-encodes). Default to
|
||
# frame-accurate — an editor should cut where you asked; the user opts into fast/keyframe.
|
||
if out.get("trim") and "crop" not in out:
|
||
out["accurate"] = bool(spec.get("accurate", True))
|
||
|
||
return out
|
||
|
||
|
||
def edit_sig(spec: dict) -> str:
|
||
"""Stable 24-char signature of a (normalized) edit spec — the per-user cache identity."""
|
||
payload = json.dumps(normalize_edit_spec(spec), sort_keys=True, separators=(",", ":"))
|
||
return hashlib.sha256(payload.encode("utf-8")).hexdigest()[:24]
|
||
|
||
|
||
def has_crop(spec: dict) -> bool:
|
||
return bool(spec.get("crop"))
|
||
|
||
|
||
def needs_reencode(spec: dict) -> bool:
|
||
"""A crop always re-encodes; a trim re-encodes only when the user asked for an accurate cut."""
|
||
return bool(spec.get("crop")) or bool(spec.get("accurate"))
|
||
|
||
|
||
def clip_duration(spec: dict, source_duration: int | None) -> int | None:
|
||
"""Duration of the derived clip (seconds), for display + progress totals."""
|
||
segs = spec.get("segments")
|
||
if segs:
|
||
return max(0, round(sum(s["end_s"] - s["start_s"] for s in segs)))
|
||
trim = spec.get("trim")
|
||
if not trim:
|
||
return source_duration
|
||
start = trim.get("start_s") or 0.0
|
||
end = trim.get("end_s")
|
||
if end is None:
|
||
end = source_duration
|
||
if end is None:
|
||
return None
|
||
return max(0, round(end - start))
|
||
|
||
|
||
# --- ffmpeg: trim / crop --------------------------------------------------------------------
|
||
|
||
def build_edit_cmd(src: Path, dest: Path, spec: dict, out_ext: str) -> list[str]:
|
||
"""ffmpeg command for a trim/crop edit. `-progress pipe:1` streams machine-readable progress.
|
||
|
||
Trim uses fast input seek (`-ss` before `-i`) + `-t duration`, which is unambiguous across
|
||
ffmpeg versions. Trim-only stream-copies; a crop forces a re-encode (a filter can't be
|
||
stream-copied)."""
|
||
trim = spec.get("trim") or {}
|
||
start = trim.get("start_s") or 0.0
|
||
end = trim.get("end_s")
|
||
crop = spec.get("crop")
|
||
reencode = needs_reencode(spec)
|
||
|
||
cmd = [
|
||
"ffmpeg", "-y", "-hide_banner", "-loglevel", "error", "-nostdin",
|
||
"-progress", "pipe:1", "-nostats",
|
||
]
|
||
if start:
|
||
cmd += ["-ss", f"{start:.3f}"]
|
||
cmd += ["-i", str(src)]
|
||
if end is not None:
|
||
dur = end - start
|
||
if dur > 0:
|
||
cmd += ["-t", f"{dur:.3f}"]
|
||
|
||
if reencode:
|
||
# Input -ss + re-encode is frame-accurate (decodes from the prior keyframe, discards up to
|
||
# the exact cut). A crop adds the filter; an accurate trim re-encodes with no filter.
|
||
if crop:
|
||
cmd += ["-vf", f"crop={crop['w']}:{crop['h']}:{crop['x']}:{crop['y']}"]
|
||
cmd += [
|
||
"-c:v", "libx264", "-preset", "veryfast", "-crf", "20",
|
||
"-c:a", "aac", "-b:a", "192k",
|
||
]
|
||
else:
|
||
cmd += ["-c", "copy", "-avoid_negative_ts", "make_zero"]
|
||
|
||
if out_ext in ("mp4", "m4a", "mov"):
|
||
cmd += ["-movflags", "+faststart"]
|
||
cmd += [str(dest)]
|
||
return cmd
|
||
|
||
|
||
def _concat_quote(path: Path) -> str:
|
||
"""Escape a path for a single-quoted `file '…'` line of an ffmpeg concat list.
|
||
|
||
ffmpeg's quoting rule: inside single quotes EVERY character is literal except `'` itself, which
|
||
is written `'\\''` (close the quote, emit an escaped quote, reopen). Backslashes are literal
|
||
there — doubling them would corrupt a path that contains one. On-disk names have been
|
||
ASCII-slugged since 0.51.0, but that change is FORWARD-ONLY: a pre-0.51.0 file still on disk can
|
||
be named `Don't_….mp4`, and an unescaped apostrophe makes the whole list unparseable."""
|
||
return path.as_posix().replace("'", "'\\''")
|
||
|
||
|
||
def build_concat_plan(src: Path, dest: Path, spec: dict, out_ext: str, staging: Path):
|
||
"""Plan a multi-segment JOIN (cut-list → one file). Returns (cmd, prep_files) where prep_files
|
||
maps a path → text content the worker must write before running (a concat list, if any).
|
||
|
||
* accurate/crop → filter_complex trim+concat, frame-accurate re-encode
|
||
* fast → concat demuxer with per-segment inpoint/outpoint, stream-copy
|
||
(keyframe-snapped, like the fast single trim)"""
|
||
segs: list[dict] = spec["segments"]
|
||
crop = spec.get("crop")
|
||
prep: dict[Path, str] = {}
|
||
head = [
|
||
"ffmpeg", "-y", "-hide_banner", "-loglevel", "error", "-nostdin",
|
||
"-progress", "pipe:1", "-nostats",
|
||
]
|
||
|
||
if needs_reencode(spec):
|
||
cropf = f",crop={crop['w']}:{crop['h']}:{crop['x']}:{crop['y']}" if crop else ""
|
||
parts, labels = [], []
|
||
for i, s in enumerate(segs):
|
||
st, en = s["start_s"], s["end_s"]
|
||
parts.append(f"[0:v]trim=start={st}:end={en},setpts=PTS-STARTPTS{cropf}[v{i}]")
|
||
parts.append(f"[0:a]atrim=start={st}:end={en},asetpts=PTS-STARTPTS[a{i}]")
|
||
labels.append(f"[v{i}][a{i}]")
|
||
parts.append(f"{''.join(labels)}concat=n={len(segs)}:v=1:a=1[v][a]")
|
||
cmd = head + [
|
||
"-i", str(src), "-filter_complex", ";".join(parts),
|
||
"-map", "[v]", "-map", "[a]",
|
||
"-c:v", "libx264", "-preset", "veryfast", "-crf", "20", "-c:a", "aac", "-b:a", "192k",
|
||
]
|
||
else:
|
||
listp = staging / "concat.txt"
|
||
lines = []
|
||
for s in segs:
|
||
lines.append(f"file '{_concat_quote(src)}'")
|
||
lines.append(f"inpoint {s['start_s']}")
|
||
lines.append(f"outpoint {s['end_s']}")
|
||
prep[listp] = "\n".join(lines) + "\n"
|
||
cmd = head + ["-f", "concat", "-safe", "0", "-i", str(listp), "-c", "copy"]
|
||
|
||
if out_ext in ("mp4", "m4a", "mov"):
|
||
cmd += ["-movflags", "+faststart"]
|
||
cmd += [str(dest)]
|
||
return cmd, prep
|
||
|
||
|
||
def _parse_out_time(line: str) -> float | None:
|
||
"""Parse a `-progress` line into elapsed output seconds."""
|
||
if line.startswith("out_time_us="):
|
||
try:
|
||
return int(line.split("=", 1)[1]) / 1_000_000
|
||
except ValueError:
|
||
return None
|
||
if line.startswith("out_time_ms="): # (some builds mislabel this as microseconds)
|
||
try:
|
||
return int(line.split("=", 1)[1]) / 1_000_000
|
||
except ValueError:
|
||
return None
|
||
return None
|
||
|
||
|
||
# No output on `-progress pipe:1` for this long means ffmpeg is wedged (a stuck network source, a
|
||
# hung filter) — a download job may legitimately be slow, but it is never SILENT for minutes.
|
||
_FFMPEG_STALL_TIMEOUT_S = 600.0
|
||
# Hard cap after we ask the process to go away; past it we stop waiting on it altogether.
|
||
_FFMPEG_EXIT_GRACE_S = 10.0
|
||
|
||
|
||
def _pump(stream, sink: "queue.Queue[str | None]") -> None:
|
||
"""Read a text pipe to EOF into a queue (None = EOF). Runs in its own thread so the main loop
|
||
can time out and poll cancel instead of blocking forever on a silent ffmpeg."""
|
||
try:
|
||
for line in stream:
|
||
sink.put(line)
|
||
except (ValueError, OSError): # pipe closed under us by the kill path
|
||
pass
|
||
finally:
|
||
sink.put(None)
|
||
|
||
|
||
def _drain_tail(stream, sink: list[str]) -> None:
|
||
"""Consume a pipe to EOF, keeping only its tail.
|
||
|
||
ffmpeg's stderr MUST be read *while it runs*: the OS pipe buffer is ~64KB, and once it fills,
|
||
ffmpeg blocks forever on its next write — the process never exits, so `proc.wait()` never
|
||
returns and the worker thread is gone for good. Reading it only after the exit (as this used
|
||
to) is exactly the deadlock."""
|
||
try:
|
||
for line in stream:
|
||
sink.append(line)
|
||
if len(sink) > 200:
|
||
del sink[:100]
|
||
except (ValueError, OSError):
|
||
pass
|
||
|
||
|
||
def _stop(proc: subprocess.Popen) -> None:
|
||
"""Terminate, then kill — never wait unbounded on a process we've given up on. Safe to call on
|
||
a process that already exited (the single exit path below may reach it after a clean wait)."""
|
||
if proc.poll() is not None:
|
||
return
|
||
proc.terminate()
|
||
try:
|
||
proc.wait(timeout=5)
|
||
except subprocess.TimeoutExpired:
|
||
proc.kill()
|
||
try:
|
||
proc.wait(timeout=5)
|
||
except subprocess.TimeoutExpired:
|
||
log.error("ffmpeg pid %s survived SIGKILL", proc.pid)
|
||
|
||
|
||
def run_ffmpeg(cmd, total_s, on_progress, should_cancel, stall_timeout_s=_FFMPEG_STALL_TIMEOUT_S) -> None:
|
||
"""Run an ffmpeg edit, reporting 0–100 progress and honouring cooperative cancel.
|
||
|
||
Both pipes are drained by threads (see `_drain_tail`) and the main loop polls on a 1s tick, so
|
||
cancel is honoured within a second even while ffmpeg is quiet, and a wedged process is killed
|
||
by the stall watchdog instead of pinning a worker thread forever.
|
||
|
||
Raises EditAborted if should_cancel() turns True mid-run, RuntimeError on a nonzero exit or a
|
||
stall."""
|
||
proc = subprocess.Popen(
|
||
cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True, bufsize=1
|
||
)
|
||
err_tail: list[str] = []
|
||
lines: queue.Queue[str | None] = queue.Queue()
|
||
readers = [
|
||
threading.Thread(target=_pump, args=(proc.stdout, lines), daemon=True),
|
||
threading.Thread(target=_drain_tail, args=(proc.stderr, err_tail), daemon=True),
|
||
]
|
||
for t in readers:
|
||
t.start()
|
||
try:
|
||
last_output = time.monotonic()
|
||
while True:
|
||
try:
|
||
line = lines.get(timeout=1.0)
|
||
except queue.Empty:
|
||
line = ""
|
||
if line is None: # stdout hit EOF — ffmpeg is done (or dying)
|
||
break
|
||
if line:
|
||
last_output = time.monotonic()
|
||
secs = _parse_out_time(line.strip())
|
||
if secs is not None and total_s:
|
||
on_progress(max(0.0, min(99.0, secs * 100.0 / total_s)))
|
||
if should_cancel():
|
||
raise EditAborted
|
||
if time.monotonic() - last_output > stall_timeout_s:
|
||
raise RuntimeError(f"ffmpeg stalled: no progress for {int(stall_timeout_s)}s")
|
||
try:
|
||
ret = proc.wait(timeout=_FFMPEG_EXIT_GRACE_S)
|
||
except subprocess.TimeoutExpired: # pipes closed but the process lingers
|
||
raise RuntimeError("ffmpeg did not exit after closing its output")
|
||
except BaseException:
|
||
# ONE exit path stops the process, so the invariant is unconditional: nothing leaves this
|
||
# function with ffmpeg still running. Not just our own EditAborted/stall — `on_progress`
|
||
# writes to the database, and an exception from THERE used to unwind past a live process,
|
||
# orphaning it (still encoding, no one left to reap it) after a 10s join on its pipes.
|
||
_stop(proc)
|
||
raise
|
||
finally:
|
||
for t in readers:
|
||
t.join(timeout=_FFMPEG_EXIT_GRACE_S)
|
||
for pipe in (proc.stdout, proc.stderr):
|
||
if pipe:
|
||
pipe.close()
|
||
if ret != 0:
|
||
raise RuntimeError(f"ffmpeg failed ({ret}): {''.join(err_tail)[-300:]}")
|
||
|
||
|
||
# --- ffmpeg: universal browser playability --------------------------------------------------
|
||
# A downloaded file must play in EVERY browser, whatever the source shipped. Universal = H.264
|
||
# video + AAC/MP3 audio in an mp4 container: H.264 is the only video codec all browsers decode
|
||
# (VP9/AV1 fail on Safari/iOS; HEVC fails on Chrome/Firefox), and mp4/AAC is the safe pairing.
|
||
# Anything else is fixed post-download: re-encode the offending stream(s), or just remux when the
|
||
# codecs are already fine but the container isn't.
|
||
_BROWSER_SAFE_VCODEC = ("h264",)
|
||
_BROWSER_SAFE_ACODEC = ("aac", "mp3")
|
||
|
||
|
||
def parse_probe_streams(payload: str) -> tuple[str | None, str | None]:
|
||
"""(video_codec, audio_codec) out of ffprobe's JSON stream list, lowercased.
|
||
|
||
JSON, not the flat `default=nw=1` output: there the fields arrive in ffprobe's own struct
|
||
order, which puts `codec_name` BEFORE `codec_type`, so a line-by-line "remember the last
|
||
codec_type" parser attributes every name to the PREVIOUS stream. Measured on real downloads:
|
||
an ordinary H.264+AAC mp4 probed as `v=aac a=None` — the browser-playability check then
|
||
believed the video stream was AAC and re-encoded a perfectly fine file on every download."""
|
||
try:
|
||
streams = json.loads(payload or "{}").get("streams") or []
|
||
except ValueError:
|
||
return None, None
|
||
vcodec = acodec = None
|
||
for s in streams:
|
||
name = (s.get("codec_name") or "").lower() or None
|
||
ctype = (s.get("codec_type") or "").lower()
|
||
if ctype == "video" and vcodec is None:
|
||
vcodec = name
|
||
elif ctype == "audio" and acodec is None:
|
||
acodec = name
|
||
return vcodec, acodec
|
||
|
||
|
||
def probe_codecs(path: Path) -> tuple[str | None, str | None]:
|
||
"""Return (video_codec, audio_codec) lowercased via one ffprobe call; None for a missing
|
||
stream or if ffprobe fails (a failed probe is treated as 'leave it alone' upstream)."""
|
||
try:
|
||
out = subprocess.run(
|
||
["ffprobe", "-v", "error", "-show_entries", "stream=codec_type,codec_name",
|
||
"-of", "json", str(path)],
|
||
capture_output=True, text=True, timeout=30, check=True,
|
||
).stdout
|
||
except (subprocess.TimeoutExpired, subprocess.CalledProcessError, OSError):
|
||
return None, None
|
||
return parse_probe_streams(out)
|
||
|
||
|
||
def probe_duration(path: Path) -> int:
|
||
"""Media duration in whole seconds via ffprobe, or 0 if unknown — a progress denominator for a
|
||
re-encode when the yt-dlp info dict carried no `duration` (some URL/live extractions)."""
|
||
try:
|
||
out = subprocess.run(
|
||
["ffprobe", "-v", "error", "-show_entries", "format=duration",
|
||
"-of", "default=nw=1:nk=1", str(path)],
|
||
capture_output=True, text=True, timeout=30, check=True,
|
||
).stdout.strip()
|
||
return int(float(out)) if out else 0
|
||
except (subprocess.TimeoutExpired, subprocess.CalledProcessError, OSError, ValueError):
|
||
return 0
|
||
|
||
|
||
def browser_transcode_flags(vcodec: str | None, acodec: str | None, is_mp4: bool) -> tuple[bool, bool, bool]:
|
||
"""Decide what (if anything) makes a file universally browser-playable. Returns
|
||
(needs_change, reencode_video, reencode_audio). needs_change=False => already H.264 + AAC/MP3
|
||
in mp4. A None codec (no such stream, or a failed probe) is never re-encoded."""
|
||
rv = bool(vcodec) and vcodec not in _BROWSER_SAFE_VCODEC
|
||
ra = bool(acodec) and acodec not in _BROWSER_SAFE_ACODEC
|
||
return (rv or ra or not is_mp4), rv, ra
|
||
|
||
|
||
def build_browser_safe_cmd(src: Path, dest: Path, reencode_video: bool, reencode_audio: bool) -> list[str]:
|
||
"""ffmpeg command that lands `src` as a browser-safe mp4 (faststart): re-encode only the
|
||
stream(s) that need it (libx264 / aac), stream-copy the rest, always into mp4. `-progress
|
||
pipe:1` streams machine-readable progress for run_ffmpeg."""
|
||
cmd = [
|
||
"ffmpeg", "-y", "-hide_banner", "-loglevel", "error", "-nostdin",
|
||
"-progress", "pipe:1", "-nostats", "-i", str(src),
|
||
]
|
||
cmd += ["-c:v", "libx264", "-preset", "veryfast", "-crf", "20"] if reencode_video else ["-c:v", "copy"]
|
||
cmd += ["-c:a", "aac", "-b:a", "192k"] if reencode_audio else ["-c:a", "copy"]
|
||
cmd += ["-movflags", "+faststart", str(dest)]
|
||
return cmd
|
||
|
||
|
||
# --- filmstrip (editor scrub track) ---------------------------------------------------------
|
||
|
||
_SB_COLS = 12
|
||
_SB_TILE_W = 160
|
||
|
||
|
||
def storyboard_geometry(duration_s: int | None) -> dict:
|
||
"""Deterministic sprite geometry for a source duration (so meta is recomputable, unstored).
|
||
|
||
~1 frame / 5 s, clamped to fill a 12-wide grid of 24–120 tiles."""
|
||
dur = max(1, int(duration_s or 1))
|
||
count = max(24, min(120, round(dur / 5)))
|
||
rows = math.ceil(count / _SB_COLS)
|
||
count = _SB_COLS * rows # fill the grid exactly
|
||
return {
|
||
"cols": _SB_COLS,
|
||
"rows": rows,
|
||
"count": count,
|
||
"interval_s": dur / count,
|
||
"tile_w": _SB_TILE_W,
|
||
}
|
||
|
||
|
||
def build_storyboard_cmd(src: Path, dest: Path, duration_s: int | None, geom: dict) -> list[str]:
|
||
"""One-pass tiled sprite. fps picks `count` frames evenly across the whole clip."""
|
||
dur = max(1, int(duration_s or 1))
|
||
fps = geom["count"] / dur
|
||
vf = f"fps={fps:.6f},scale={_SB_TILE_W}:-2,tile={geom['cols']}x{geom['rows']}"
|
||
return [
|
||
"ffmpeg", "-y", "-hide_banner", "-loglevel", "error", "-nostdin",
|
||
"-i", str(src), "-frames:v", "1", "-q:v", "5", "-vf", vf, str(dest),
|
||
]
|
||
|
||
|
||
def build_poster_cmd(src: Path, dest: Path, at_s: float) -> list[str]:
|
||
"""Grab one representative frame as a poster JPEG. `-ss` before `-i` seeks fast."""
|
||
return [
|
||
"ffmpeg", "-y", "-hide_banner", "-loglevel", "error", "-nostdin",
|
||
"-ss", f"{max(0.0, at_s):.3f}", "-i", str(src),
|
||
"-frames:v", "1", "-q:v", "3", "-vf", "scale=640:-2", str(dest),
|
||
]
|
||
|
||
|
||
def ensure_poster(asset, download_root: str, timeout_s: int = 30) -> str | None:
|
||
"""Generate a poster frame for a ready asset that has no thumbnail (e.g. a direct media URL
|
||
like a reddit HLS manifest, which yt-dlp can't get a thumbnail for). Written as the media's
|
||
`<base>.jpg` sidecar — so Plex uses it too and `delete_asset_files` cleans it up — and returned
|
||
as a rel path (or None on failure). Best-effort + time-bounded; a few seconds in (or 10% of a
|
||
short clip) dodges black intro frames."""
|
||
if not asset.rel_path:
|
||
return None
|
||
root = Path(download_root)
|
||
src = root / asset.rel_path
|
||
if not src.exists():
|
||
return None
|
||
rel = str(Path(asset.rel_path).with_suffix(".jpg"))
|
||
dest = root / rel
|
||
if dest.exists():
|
||
return rel
|
||
at = min(3.0, (asset.duration_s or 10) * 0.1)
|
||
try:
|
||
subprocess.run(build_poster_cmd(src, dest, at), capture_output=True, timeout=timeout_s, check=True)
|
||
except (subprocess.TimeoutExpired, subprocess.CalledProcessError, OSError) as exc:
|
||
log.info("poster gen skipped for asset %s: %s", asset.id, str(exc)[:120])
|
||
return None
|
||
return rel if dest.exists() else None
|
||
|
||
|
||
def ensure_storyboard(asset, download_root: str, timeout_s: int = 90) -> dict | None:
|
||
"""Return the filmstrip meta for a ready source asset, generating the sprite on first use.
|
||
|
||
Best-effort + time-bounded: for a very long/high-res source the one-pass decode can be slow,
|
||
so it's capped by `timeout_s`; on timeout/failure we return None and the editor falls back to
|
||
a plain timeline (no filmstrip). Caches the sprite path on `asset.storyboard_path`.
|
||
|
||
Returns None (caller should NOT commit) if generation didn't happen; otherwise a meta dict and
|
||
sets `asset.storyboard_path` (caller commits)."""
|
||
if not asset.rel_path:
|
||
return None
|
||
geom = storyboard_geometry(asset.duration_s)
|
||
root = Path(download_root)
|
||
rel = f".storyboards/asset-{asset.id}.jpg"
|
||
dest = root / rel
|
||
|
||
if asset.storyboard_path and (root / asset.storyboard_path).exists():
|
||
return {**geom, "rel": asset.storyboard_path}
|
||
|
||
src = root / asset.rel_path
|
||
if not src.exists():
|
||
return None
|
||
dest.parent.mkdir(parents=True, exist_ok=True)
|
||
cmd = build_storyboard_cmd(src, dest, asset.duration_s, geom)
|
||
try:
|
||
subprocess.run(cmd, capture_output=True, timeout=timeout_s, check=True)
|
||
except (subprocess.TimeoutExpired, subprocess.CalledProcessError, OSError) as exc:
|
||
log.info("storyboard gen skipped for asset %s: %s", asset.id, str(exc)[:120])
|
||
return None
|
||
if not dest.exists():
|
||
return None
|
||
asset.storyboard_path = rel # caller commits
|
||
return {**geom, "rel": rel}
|