Datasets:
File size: 7,125 Bytes
b03465f | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | #!/usr/bin/env python3
"""Validate the prepared MatrixCity Hugging Face dataset directory."""
from __future__ import annotations
import argparse
import csv
import hashlib
import json
import sys
from collections import Counter
from pathlib import Path
ROOT = Path(__file__).resolve().parents[1]
def sha256(path: Path) -> str:
digest = hashlib.sha256()
with path.open("rb") as handle:
for chunk in iter(lambda: handle.read(8 * 1024 * 1024), b""):
digest.update(chunk)
return digest.hexdigest()
def fail(errors: list[str], message: str) -> None:
errors.append(message)
def validate_metadata(errors: list[str]) -> Counter:
metadata_path = ROOT / "data" / "metadata.jsonl"
if not metadata_path.is_file():
fail(errors, "Missing data/metadata.jsonl")
return Counter()
counts: Counter = Counter()
sample_ids: set[str] = set()
video_paths: set[str] = set()
with metadata_path.open("r", encoding="utf-8") as handle:
for line_number, line in enumerate(handle, start=1):
try:
row = json.loads(line)
except json.JSONDecodeError as error:
fail(errors, f"metadata line {line_number}: {error}")
continue
sample_id = row.get("sample_id")
if not sample_id or sample_id in sample_ids:
fail(errors, f"metadata line {line_number}: missing/duplicate sample_id {sample_id!r}")
sample_ids.add(sample_id)
file_name = row.get("file_name")
if not file_name or file_name in video_paths:
fail(errors, f"metadata line {line_number}: missing/duplicate file_name {file_name!r}")
continue
video_paths.add(file_name)
video_path = ROOT / "data" / Path(file_name)
if not video_path.is_file():
fail(errors, f"metadata line {line_number}: missing video {file_name}")
annotations = row.get("annotations") or []
has_annotations = bool(row.get("has_annotations"))
if len(annotations) != row.get("annotation_frame_count"):
fail(errors, f"{sample_id}: annotation_frame_count mismatch")
if has_annotations and len(annotations) != row.get("frame_count"):
fail(errors, f"{sample_id}: video/annotation frame count mismatch")
if not has_annotations and annotations:
fail(errors, f"{sample_id}: unannotated record contains frame annotations")
expected_ids = list(range(1, len(annotations) + 1))
actual_ids = [annotation.get("frame_id") for annotation in annotations]
if actual_ids != expected_ids:
fail(errors, f"{sample_id}: frame IDs are not contiguous and one-based")
width = row.get("width")
height = row.get("height")
bbox_count = 0
usable_count = 0
for annotation in annotations:
bbox = annotation.get("bbox_xywh")
has_bbox = bool(annotation.get("has_bbox"))
if has_bbox != (bbox is not None):
fail(errors, f"{sample_id} frame {annotation.get('frame_id')}: has_bbox mismatch")
continue
if bbox is None:
continue
bbox_count += 1
if not annotation.get("source_marked_invalid"):
usable_count += 1
if not isinstance(bbox, list) or len(bbox) != 4:
fail(errors, f"{sample_id} frame {annotation.get('frame_id')}: malformed bbox")
continue
x, y, box_width, box_height = bbox
if min(x, y, box_width, box_height) < 0 or box_width <= 0 or box_height <= 0:
fail(errors, f"{sample_id} frame {annotation.get('frame_id')}: invalid bbox values")
if x + box_width > width or y + box_height > height:
fail(errors, f"{sample_id} frame {annotation.get('frame_id')}: bbox out of bounds")
if bbox_count != row.get("bbox_frame_count"):
fail(errors, f"{sample_id}: bbox_frame_count mismatch")
if usable_count != row.get("usable_bbox_frame_count"):
fail(errors, f"{sample_id}: usable_bbox_frame_count mismatch")
annotation_path = row.get("annotation_path")
if has_annotations:
if not annotation_path or not (ROOT / Path(annotation_path)).is_file():
fail(errors, f"{sample_id}: missing canonical annotation CSV")
elif annotation_path is not None:
fail(errors, f"{sample_id}: unannotated record has annotation_path")
counts["videos"] += 1
counts["annotated_videos"] += has_annotations
counts["annotation_rows"] += len(annotations)
counts["bbox_rows"] += bbox_count
counts["usable_bbox_rows"] += usable_count
counts[f"subset:{row.get('subset')}"] += 1
disk_videos = set(
path.relative_to(ROOT / "data").as_posix()
for path in (ROOT / "data" / "videos").rglob("*.mp4")
)
extras = sorted(disk_videos - video_paths)
if extras:
fail(errors, f"{len(extras)} unreferenced MP4 files; first: {extras[0]}")
return counts
def validate_manifest(errors: list[str], checksums: bool) -> Counter:
manifest_path = ROOT / "manifests" / "files.csv"
counts: Counter = Counter()
if not manifest_path.is_file():
fail(errors, "Missing manifests/files.csv")
return counts
with manifest_path.open("r", encoding="utf-8", newline="") as handle:
for row in csv.DictReader(handle):
path = ROOT / Path(row["path"])
if not path.is_file():
fail(errors, f"Manifest file missing: {row['path']}")
continue
if path.stat().st_size != int(row["size_bytes"]):
fail(errors, f"Manifest size mismatch: {row['path']}")
if checksums and sha256(path) != row["sha256"]:
fail(errors, f"Manifest SHA-256 mismatch: {row['path']}")
counts[f"manifest:{row['role']}"] += 1
return counts
def main() -> int:
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument("--checksums", action="store_true", help="Recompute every payload SHA-256.")
args = parser.parse_args()
errors: list[str] = []
counts = validate_metadata(errors)
counts.update(validate_manifest(errors, args.checksums))
if errors:
print(f"FAILED: {len(errors)} issue(s)", file=sys.stderr)
for error in errors[:100]:
print(f"- {error}", file=sys.stderr)
if len(errors) > 100:
print(f"- ... {len(errors) - 100} more", file=sys.stderr)
return 1
mode = "structure and checksums" if args.checksums else "structure"
print(f"PASS: {mode}")
for key in sorted(counts):
print(f"{key}: {counts[key]}")
return 0
if __name__ == "__main__":
sys.exit(main())
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