def _classify(
video: typing.Union[str, VideoObject],
data_home: str = None,
model: str = None,
# optional: these args below are sent for `cutter`
compress_rate: float = 0.2,
target_size: typing.Tuple[int, int] = None,
limit_range: typing.List[VideoCutRange] = None,
) -> ClassifierResult:
"""
classify a video with some tagged pictures
optional: if you have changed the default value in `cut`, you'd better keep them(offset and limit) equal.
:param video: video path or object
:param data_home: output path (dir)
:param model: LinearSVC model (path)
:param compress_rate: before_pic * compress_rate = after_pic. default to 0.2
:param target_size: (100, 200)
:param limit_range:
:return: typing.List[ClassifierResult]
"""
if isinstance(video, str):
video = VideoObject(video)
assert data_home or model, "classification should based on dataset or trained model"
cl = SVMClassifier(compress_rate=compress_rate, target_size=target_size)
if model:
cl.load_model(model)
else:
cl.load(data_home)
cl.train()
return cl.classify(video, limit_range=limit_range)
def test_work_with_cutter():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
stable, _ = cutter_res.get_range()
classify_result = cl.classify(VIDEO_PATH, stable)
# --- draw ---
_draw_report(classify_result)
def test_save_and_load():
# test save and load
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
classify_result = cl.classify(VIDEO_PATH)
# --- draw ---
_draw_report(classify_result)
def test_keep_data():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
stable, _ = cutter_res.get_range()
classify_result = cl.classify(VIDEO_PATH, stable, keep_data=True)
# todo findit bug here
image_object = toolbox.imread(IMAGE_PATH)[0:20, 0:20]
assert classify_result.data[0].contain_image(image_object=image_object)
def test_dump_and_load():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
classify_result = cl.classify(VIDEO_PATH, boost_mode=False)
json_path = "classify_result.json"
classify_result.dump(json_path)
res_from_file = ClassifierResult.load(json_path)
assert classify_result.dumps() == res_from_file.dumps()
def test_result():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
stable, _ = cutter_res.get_range()
classify_result = cl.classify(VIDEO_PATH, stable, keep_data=True)
assert classify_result.to_dict()
classify_result.mark_range(1, 3, "0")
classify_result.mark_range_unstable(1, 3)
classify_result.get_important_frame_list()
def test_save_and_load():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
classify_result = cl.classify(VIDEO_PATH)
result_file = "save.json"
reporter = Reporter()
reporter.save(result_file, classify_result)
assert os.path.isfile(result_file)
classify_result_after = Reporter.load(result_file)
assert len(classify_result) == len(classify_result_after)
for i, j in zip(classify_result, classify_result_after):
assert i.to_dict() == j.to_dict()
def test_result():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
stable, _ = cutter_res.get_range()
classify_result = cl.classify(VIDEO_PATH, stable, keep_data=True)
assert classify_result.to_dict()
classify_result.mark_range(1, 3, "0")
classify_result.mark_range_unstable(1, 3)
classify_result.get_important_frame_list()
classify_result.get_stage_range()
classify_result.get_specific_stage_range("0")
classify_result.get_not_stable_stage_range()
assert classify_result.first("1").frame_id == 20
assert classify_result.last("1").frame_id == 21
def test_save_and_load():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
classify_result = cl.classify(VIDEO_PATH, boost_mode=False)
result_file = "save.json"
reporter = Reporter()
reporter.add_extra("some_name", "some_value")
reporter.save(result_file, classify_result)
assert os.path.isfile(result_file)
classify_result_after = Reporter.load(result_file)
assert classify_result.get_length() == classify_result_after.get_length()
for i, j in zip(classify_result.data, classify_result_after.data):
assert i.to_dict() == j.to_dict()
assert isinstance(reporter.get_stable_stage_sample(classify_result),
np.ndarray)
def classify(
video: typing.Union[str, VideoObject],
data_home: str = None,
model: str = None,
# optional: these args below are sent for `cutter`
compress_rate: float = 0.2,
target_size: typing.Tuple[int, int] = None,
offset: int = 3,
limit: int = None,
threshold: float = 0.95,
) -> ClassifierResult:
"""
classify a video with some tagged pictures
optional: if you have changed the default value in `cut`, you'd better keep them(offset and limit) equal.
:param video: video path or object
:param data_home: output path (dir)
:param model: LinearSVC model (path)
:param compress_rate: before_pic * compress_rate = after_pic. default to 0.2
:param target_size: (100, 200)
:param offset:
it will change the way to decided whether two ranges can be merged
before: first_range.end == second_range.start
after: first_range.end + offset >= secord_range.start
:param limit: ignore some ranges which are too short, 5 means ignore stable ranges which length < 5
:param threshold: cutter threshold
:return: typing.List[ClassifierResult]
"""
if isinstance(video, str):
video = VideoObject(video)
assert data_home or model, "classification should based on dataset or trained model"
cl = SVMClassifier(compress_rate=compress_rate, target_size=target_size)
if model:
cl.load_model(model)
else:
cl.load(data_home)
cl.train()
# re cut
cut_result, _ = cut(video, compress_rate=compress_rate, threshold=threshold)
stable, _ = cut_result.get_range(offset=offset, limit=limit)
return cl.classify(video, stable)
def calculate_result(_cl, _SVM_or_Keras, _param, _from_movie_2_picture,
_model_file, _video_path_for_forecast):
if _SVM_or_Keras == '1\n':
print('使用SVM进行预测')
cl = SVMClassifier(
# 默认情况下使用 HoG 进行特征提取。你可以将其关闭从而直接对原始图片进行训练与测试：feature_type='raw'
feature_type="hog",
# 默认为0.2，即将图片缩放为0.2倍。主要为了提高计算效率,如果你担心影响分析效果，可以将其提高
compress_rate=_param[0],
)
# 加载待训练数据
cl.load_model(_model_file)
elif _SVM_or_Keras == '2\n':
# 分析视频_聚类
print('使用KerasClassifier进行预测')
cl = KerasClassifier(
compress_rate=_param[0],
# 在使用时需要保证数据集格式统一（与训练集）。因为 train_model.py 用了 600x800，所以这里设定成一样的
# target_size=(600, 800),
)
cl.load_model(_model_file)
# 开始预测
_forecast_result = []
# 获取forecast文件夹的mp4文件列表
forecast_video_list = public_fun.get_mp4file_name(_video_path_for_forecast)
for i in forecast_video_list:
# 分析视频_切割视频
stable = get_data.get_range('forecast', i, _param,
_from_movie_2_picture)
classify_result = cl.classify(i, stable, keep_data=True)
result_dict = classify_result.to_dict()
_forecast_result.append(
public_fun.write_result_to_local(i, _from_movie_2_picture,
result_dict, classify_result))
# _forecast_result = [['5.mp4', '3.161888888888889', '1',
# '4.155888888888889', '1', '8.040888888888889', '1']]
return _forecast_result
def test_result():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
stable, _ = cutter_res.get_range()
classify_result = cl.classify(VIDEO_PATH, stable, keep_data=True)
assert classify_result.to_dict()
classify_result.mark_range(1, 3, "0")
classify_result.mark_range_unstable(1, 3)
classify_result.get_important_frame_list()
classify_result.get_stage_range()
classify_result.get_specific_stage_range("0")
classify_result.get_not_stable_stage_range()
classify_result.mark_range_ignore(23, 24)
classify_result.time_cost_between("0", "1")
assert classify_result.contain("1")
assert classify_result.first("1").frame_id == 20
assert classify_result.last("1").frame_id == 21
assert classify_result.is_order_correct(["0", "0", "1", "2"])
assert classify_result.is_order_correct(["0", "0", "2"])
assert classify_result.is_order_correct(["0", "1"])
assert classify_result.is_order_correct(["0", "2"])
assert classify_result.is_order_correct(["1", "2"])
def test_boost():
cl = SVMClassifier()
cl.load_model(MODEL_PATH)
classify_result = cl.classify(VIDEO_PATH, boost_mode=True)
assert classify_result
"""
二次训练
在业务变更时，难免出现需要调整模型的情况
- 如果业务变更较大，推荐重新训练新模型
- 如果业务变更不大，可以按照下面的方法对原有模型进行调整
"""
from stagesepx.classifier import SVMClassifier
DATA_HOME = './cut_result'
cl = SVMClassifier()
# 加载数据
cl.load(DATA_HOME)
# 加载旧模型
cl.load_model('model.pkl')
# 在加载数据完成之后需要先训练
cl.train()
# 保存新模型
cl.save_model('new_model.pkl')
# 或者你可以直接覆盖掉旧的模型
# cl.save_model('model.pkl', overwrite=True)
from stagesepx.classifier import SVMClassifier
from stagesepx.cutter import VideoCutter
from stagesepx.reporter import Reporter
TARGET_VIDEO = '../../demo.mp4'
# cut
# 这里依旧使用了 cut，主要目的还是为了可以比较好的处理变化中的过程
# 但这次我们不需要用到 pick_and_save，因为这次 classifier 不会使用 cutter 的数据
cutter = VideoCutter()
res = cutter.cut(TARGET_VIDEO)
stable, _ = res.get_range()
# classify
# 这里的参数需要保持与train.py一致，如果你有改动的话
cl = SVMClassifier()
cl.load_model('./model.pkl')
classify_result = cl.classify(
TARGET_VIDEO,
stable,
)
r = Reporter()
r.draw(
classify_result,
report_path='report.html',
cut_result=res,
)
def run(config: typing.Union[dict, str]):
"""
run with config
:param config: config file path, or a preload dict
:return:
"""
class _VideoUserConfig(BaseModel):
path: str
pre_load: bool = True
fps: int = None
class _CutterUserConfig(BaseModel):
threshold: float = None
frame_count: int = None
offset: int = None
limit: int = None
block: int = None
# common
compress_rate: float = None
target_size: typing.Tuple[int, int] = None
class _ClassifierType(Enum):
SVM = "svm"
KERAS = "keras"
class _ClassifierUserConfig(BaseModel):
boost_mode: bool = None
classifier_type: _ClassifierType = _ClassifierType.SVM
model: str = None
# common
compress_rate: float = None
target_size: typing.Tuple[int, int] = None
class _CalcOperatorType(Enum):
BETWEEN = "between"
DISPLAY = "display"
class _CalcOperator(BaseModel):
name: str
calc_type: _CalcOperatorType
args: dict = dict()
class _CalcUserConfig(BaseModel):
output: str = None
ignore_error: bool = None
operators: typing.List[_CalcOperator] = None
class _ExtraUserConfig(BaseModel):
save_train_set: str = None
class UserConfig(BaseModel):
output: str
video: _VideoUserConfig
cutter: _CutterUserConfig = _CutterUserConfig()
classifier: _ClassifierUserConfig = _ClassifierUserConfig()
calc: _CalcUserConfig = _CalcUserConfig()
extras: _ExtraUserConfig = _ExtraUserConfig()
if isinstance(config, str):
# path
config_path = pathlib.Path(config)
assert config_path.is_file(), f"no config file found in {config_path}"
# todo: support different types in the future
assert config_path.as_posix().endswith(
".json"), "config file should be json format"
with open(config_path, encoding=constants.CHARSET) as f:
config = json.load(f)
config = UserConfig(**config)
logger.info(f"config: {config}")
# main flow
video = VideoObject(
# fmt: off
path=config.video.path,
fps=config.video.fps,
)
if config.video.pre_load:
video.load_frames()
# cut
cutter = VideoCutter(
# fmt: off
compress_rate=config.cutter.compress_rate,
target_size=config.cutter.target_size,
)
res = cutter.cut(
# fmt: off
video=video,
block=config.cutter.block,
)
stable, unstable = res.get_range(
# fmt: off
threshold=config.cutter.threshold,
offset=config.cutter.offset,
)
with tempfile.TemporaryDirectory() as temp_dir:
# classify
if config.classifier.classifier_type is _ClassifierType.SVM:
cl = SVMClassifier(
# fmt: off
compress_rate=config.classifier.compress_rate,
target_size=config.classifier.target_size,
)
elif config.classifier.classifier_type is _ClassifierType.KERAS:
from stagesepx.classifier.keras import KerasClassifier
cl = KerasClassifier(
# fmt: off
compress_rate=config.classifier.compress_rate,
target_size=config.classifier.target_size,
)
# validation has been applied by pydantic
# so no `else`
if config.classifier.model:
# no need to retrain
model_path = pathlib.Path(config.classifier.model)
assert model_path.is_file(), f"file {model_path} not existed"
cl.load_model(model_path)
else:
# train a new model
train_set_dir = config.extras.save_train_set or temp_dir
os.makedirs(train_set_dir, exist_ok=True)
res.pick_and_save(
# fmt: off
stable,
frame_count=config.cutter.frame_count,
to_dir=train_set_dir,
)
cl.train(data_path=train_set_dir)
# start classifying
classify_result = cl.classify(
# fmt: off
video,
stable,
boost_mode=config.classifier.boost_mode,
)
# calc
def _calc_display() -> dict:
# jsonify
return json.loads(classify_result.dumps())
def _calc_between(*, from_stage: str = None, to_stage: str = None) -> dict:
assert classify_result.contain(
from_stage), f"no stage {from_stage} found in result"
assert classify_result.contain(
to_stage), f"no stage {to_stage} found in result"
from_frame = classify_result.last(from_stage)
to_frame = classify_result.first(to_stage)
cost = to_frame.timestamp - from_frame.timestamp
return {
"from": from_frame.frame_id,
"to": to_frame.frame_id,
"cost": cost,
}
_calc_func_dict = {
_CalcOperatorType.BETWEEN: _calc_between,
_CalcOperatorType.DISPLAY: _calc_display,
}
calc_output = config.calc.output
if calc_output:
output_path = pathlib.Path(calc_output)
assert not output_path.is_file(), f"file {output_path} already existed"
result = []
for each_calc in config.calc.operators:
func = _calc_func_dict[each_calc.calc_type]
try:
func_ret = func(**each_calc.args)
except Exception as e:
if not config.calc.ignore_error:
raise
logger.warning(e)
func_ret = traceback.format_exc()
calc_ret = {
"name": each_calc.name,
"type": each_calc.calc_type.value,
"result": func_ret,
}
result.append(calc_ret)
with open(output_path, "w", encoding=constants.CHARSET) as f:
json.dump(result, f)
# draw
r = Reporter()
r.draw(
# fmt: off
classify_result,
report_path=config.output,
)
