def test_is_missing():
vid = Video.from_media(TEST_SMALL_ROBOT_MP4_FILE)
assert not vid.is_missing
vid = Video.from_media("non-existent-filename.mp4")
assert vid.is_missing
vid = Video.from_numpy(
Video.from_media(TEST_SMALL_ROBOT_MP4_FILE).get_frames((3, 7, 9)))
assert not vid.is_missing
def test_mp4_file_not_found():
with pytest.raises(FileNotFoundError):
vid = Video.from_media("non-existent-filename.mp4")
vid.channels
def load_predicted_labels_json_old(
data_path: str,
parsed_json: dict = None,
adjust_matlab_indexing: bool = True,
fix_rel_paths: bool = True,
) -> List[LabeledFrame]:
"""
Load predicted instances from Talmo's old JSON format.
Args:
data_path: The path to the JSON file.
parsed_json: The parsed json if already loaded, so we can save
some time if already parsed.
adjust_matlab_indexing: Whether to adjust indexing from MATLAB.
fix_rel_paths: Whether to fix paths to videos to absolute paths.
Returns:
List of :class:`LabeledFrame` objects.
"""
if parsed_json is None:
data = json.loads(open(data_path).read())
else:
data = parsed_json
videos = pd.DataFrame(data["videos"])
predicted_instances = pd.DataFrame(data["predicted_instances"])
predicted_points = pd.DataFrame(data["predicted_points"])
if adjust_matlab_indexing:
predicted_instances.frameIdx -= 1
predicted_points.frameIdx -= 1
predicted_points.node -= 1
predicted_points.x -= 1
predicted_points.y -= 1
skeleton = Skeleton()
skeleton.add_nodes(data["skeleton"]["nodeNames"])
edges = data["skeleton"]["edges"]
if adjust_matlab_indexing:
edges = np.array(edges) - 1
for (src_idx, dst_idx) in edges:
skeleton.add_edge(
data["skeleton"]["nodeNames"][src_idx],
data["skeleton"]["nodeNames"][dst_idx],
)
if fix_rel_paths:
for i, row in videos.iterrows():
p = row.filepath
if not os.path.exists(p):
p = os.path.join(os.path.dirname(data_path), p)
if os.path.exists(p):
videos.at[i, "filepath"] = p
# Make the video objects
video_objects = {}
for i, row in videos.iterrows():
if videos.at[i, "format"] == "media":
vid = Video.from_media(videos.at[i, "filepath"])
else:
vid = Video.from_hdf5(
filename=videos.at[i, "filepath"], dataset=videos.at[i, "dataset"]
)
video_objects[videos.at[i, "id"]] = vid
track_ids = predicted_instances["trackId"].values
unique_track_ids = np.unique(track_ids)
spawned_on = {
track_id: predicted_instances.loc[predicted_instances["trackId"] == track_id][
"frameIdx"
].values[0]
for track_id in unique_track_ids
}
tracks = {
i: Track(name=str(i), spawned_on=spawned_on[i])
for i in np.unique(predicted_instances["trackId"].values).tolist()
}
# A function to get all the instances for a particular video frame
def get_frame_predicted_instances(video_id, frame_idx):
points = predicted_points
is_in_frame = (points["videoId"] == video_id) & (
points["frameIdx"] == frame_idx
)
if not is_in_frame.any():
return []
instances = []
frame_instance_ids = np.unique(points["instanceId"][is_in_frame])
for i, instance_id in enumerate(frame_instance_ids):
is_instance = is_in_frame & (points["instanceId"] == instance_id)
track_id = predicted_instances.loc[
predicted_instances["id"] == instance_id
]["trackId"].values[0]
match_score = predicted_instances.loc[
predicted_instances["id"] == instance_id
]["matching_score"].values[0]
track_score = predicted_instances.loc[
predicted_instances["id"] == instance_id
]["tracking_score"].values[0]
instance_points = {
data["skeleton"]["nodeNames"][n]: PredictedPoint(
x, y, visible=v, score=confidence
)
for x, y, n, v, confidence in zip(
*[
points[k][is_instance]
for k in ["x", "y", "node", "visible", "confidence"]
]
)
}
instance = PredictedInstance(
skeleton=skeleton,
points=instance_points,
track=tracks[track_id],
score=match_score,
)
instances.append(instance)
return instances
# Get the unique labeled frames and construct a list of LabeledFrame objects for them.
frame_keys = list(
{
(videoId, frameIdx)
for videoId, frameIdx in zip(
predicted_points["videoId"], predicted_points["frameIdx"]
)
}
)
frame_keys.sort()
labels = []
for videoId, frameIdx in frame_keys:
label = LabeledFrame(
video=video_objects[videoId],
frame_idx=frameIdx,
instances=get_frame_predicted_instances(videoId, frameIdx),
)
labels.append(label)
return labels