File size: 4,426 Bytes
9308c70 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | #!/usr/bin/env python3
"""
Reconstruct DAVIS PointMotionBench videos from DAVIS 2017 Trainval frames.
Download Trainval 2017 - Images (480p) and Annotations from
https://davischallenge.org/davis2017/code.html, then run this script.
The DAVIS root should have this layout after extraction:
<davis-root>/
└── JPEGImages/
└── 480p/
└── <sequence>/
├── 00000.jpg
├── 00001.jpg
└── ...
Example:
python davis/reconstruct_davis.py \
--davis-root /path/to/DAVIS \
--output-dir davis/videos/input_480p \
--captions davis/davis_captions.json
"""
import argparse
import json
import os
import shutil
import subprocess
import sys
from pathlib import Path
TARGET_FPS = 24
def ffmpeg_exe():
if shutil.which("ffmpeg"):
return "ffmpeg"
try:
import imageio_ffmpeg
return imageio_ffmpeg.get_ffmpeg_exe()
except Exception:
raise RuntimeError(
"ffmpeg not found; install a system ffmpeg or `pip install imageio-ffmpeg`."
)
def encode_sequence(ffmpeg, frames_dir, dst, fps):
frames = sorted(frames_dir.glob("*.jpg"))
if not frames:
raise RuntimeError(f"no .jpg frames found in {frames_dir}")
dst.parent.mkdir(parents=True, exist_ok=True)
tmp = dst.with_suffix(".tmp.mp4")
cmd = [
ffmpeg, "-y", "-loglevel", "error",
"-framerate", str(fps),
"-i", str(frames_dir / "%05d.jpg"),
"-vf", "crop=trunc(iw/2)*2:trunc(ih/2)*2",
"-c:v", "libx264", "-crf", "18", "-preset", "fast",
"-pix_fmt", "yuv420p", "-an",
str(tmp),
]
res = subprocess.run(cmd, capture_output=True)
if res.returncode != 0:
if tmp.exists():
tmp.unlink()
raise RuntimeError(res.stderr.decode(errors="replace").strip() or "ffmpeg failed")
os.replace(tmp, dst)
def main():
parser = argparse.ArgumentParser(
description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter
)
parser.add_argument(
"--davis-root", required=True, type=Path,
help="DAVIS 2017 root dir containing JPEGImages/480p/"
)
parser.add_argument(
"--output-dir", type=Path,
default=Path(__file__).resolve().parent / "videos" / "input_480p",
help="Output directory for mp4 files (default: davis/videos/input_480p/)",
)
parser.add_argument(
"--captions", type=Path,
default=Path(__file__).resolve().parent / "davis_captions.json",
help="davis_captions.json (default: alongside this script)",
)
parser.add_argument("--fps", type=int, default=TARGET_FPS)
parser.add_argument("--overwrite", action="store_true", help="Re-encode even if output exists")
args = parser.parse_args()
frames_root = args.davis_root / "JPEGImages" / "480p"
if not frames_root.exists():
print(f"ERROR: {frames_root} does not exist — check --davis-root points to the DAVIS 2017 root.")
sys.exit(1)
captions = json.load(open(args.captions))
sequences = sorted(captions.keys())
args.output_dir.mkdir(parents=True, exist_ok=True)
ffmpeg = ffmpeg_exe()
print(f"[reconstruct] {len(sequences)} sequences | davis-root={args.davis_root} | out={args.output_dir}")
done = skipped = failed = 0
missing = []
for i, seq in enumerate(sequences, 1):
dst = args.output_dir / f"{seq}.mp4"
if dst.exists() and not args.overwrite:
skipped += 1
continue
frames_dir = frames_root / seq
if not frames_dir.exists():
missing.append(seq)
print(f"[{i}/{len(sequences)}] MISSING {seq}")
failed += 1
continue
try:
encode_sequence(ffmpeg, frames_dir, dst, args.fps)
print(f"[{i}/{len(sequences)}] OK {seq}")
done += 1
except Exception as e:
print(f"[{i}/{len(sequences)}] ERROR {seq}: {e}")
failed += 1
print(f"\n===== summary =====")
print(f"encoded ok : {done}")
print(f"skipped (exists) : {skipped}")
print(f"missing upstream : {len(missing)}")
print(f"failed : {failed}")
for seq in missing[:20]:
print(f" [MISSING] {seq}")
if missing or failed:
sys.exit(1)
if __name__ == "__main__":
main()
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