# coding=utf-8
# Copyright 2025 The HuggingFace Inc. team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import json
import os
import warnings
from copy import deepcopy
from functools import partial
from typing import Any, Callable, Optional, Union

import numpy as np

from .dynamic_module_utils import custom_object_save
from .image_processing_utils import (
    BatchFeature,
    get_size_dict,
)
from .image_processing_utils_fast import BaseImageProcessorFast
from .image_utils import (
    ChannelDimension,
    SizeDict,
    validate_kwargs,
)
from .processing_utils import Unpack, VideosKwargs
from .utils import (
    IMAGE_PROCESSOR_NAME,
    PROCESSOR_NAME,
    VIDEO_PROCESSOR_NAME,
    TensorType,
    add_start_docstrings,
    copy_func,
    download_url,
    is_offline_mode,
    is_remote_url,
    is_torch_available,
    is_torchcodec_available,
    is_torchvision_available,
    is_torchvision_v2_available,
    logging,
)
from .utils.hub import cached_file
from .utils.import_utils import requires
from .video_utils import (
    VideoInput,
    VideoMetadata,
    group_videos_by_shape,
    is_valid_video,
    load_video,
    make_batched_metadata,
    make_batched_videos,
    reorder_videos,
    to_channel_dimension_format,
)


if is_torch_available():
    import torch

if is_torchvision_available():
    if is_torchvision_v2_available():
        from torchvision.transforms.v2 import functional as F
    else:
        from torchvision.transforms import functional as F

logger = logging.get_logger(__name__)


BASE_VIDEO_PROCESSOR_DOCSTRING = r"""
    Args:
        do_resize (`bool`, *optional*, defaults to `self.do_resize`):
            Whether to resize the video's (height, width) dimensions to the specified `size`. Can be overridden by the
            `do_resize` parameter in the `preprocess` method.
        size (`dict`, *optional*, defaults to `self.size`):
            Size of the output video after resizing. Can be overridden by the `size` parameter in the `preprocess`
            method.
        size_divisor (`int`, *optional*, defaults to `self.size_divisor`):
            The size by which to make sure both the height and width can be divided.
        default_to_square (`bool`, *optional*, defaults to `self.default_to_square`):
            Whether to default to a square video when resizing, if size is an int.
        resample (`PILImageResampling`, *optional*, defaults to `self.resample`):
            Resampling filter to use if resizing the video. Only has an effect if `do_resize` is set to `True`. Can be
            overridden by the `resample` parameter in the `preprocess` method.
        do_center_crop (`bool`, *optional*, defaults to `self.do_center_crop`):
            Whether to center crop the video to the specified `crop_size`. Can be overridden by `do_center_crop` in the
            `preprocess` method.
        do_pad (`bool`, *optional*):
            Whether to pad the video to the `(max_height, max_width)` of the videos in the batch.
        crop_size (`dict[str, int]` *optional*, defaults to `self.crop_size`):
            Size of the output video after applying `center_crop`. Can be overridden by `crop_size` in the `preprocess`
            method.
        do_rescale (`bool`, *optional*, defaults to `self.do_rescale`):
            Whether to rescale the video by the specified scale `rescale_factor`. Can be overridden by the
            `do_rescale` parameter in the `preprocess` method.
        rescale_factor (`int` or `float`, *optional*, defaults to `self.rescale_factor`):
            Scale factor to use if rescaling the video. Only has an effect if `do_rescale` is set to `True`. Can be
            overridden by the `rescale_factor` parameter in the `preprocess` method.
        do_normalize (`bool`, *optional*, defaults to `self.do_normalize`):
            Whether to normalize the video. Can be overridden by the `do_normalize` parameter in the `preprocess`
            method. Can be overridden by the `do_normalize` parameter in the `preprocess` method.
        image_mean (`float` or `list[float]`, *optional*, defaults to `self.image_mean`):
            Mean to use if normalizing the video. This is a float or list of floats the length of the number of
            channels in the video. Can be overridden by the `image_mean` parameter in the `preprocess` method. Can be
            overridden by the `image_mean` parameter in the `preprocess` method.
        image_std (`float` or `list[float]`, *optional*, defaults to `self.image_std`):
            Standard deviation to use if normalizing the video. This is a float or list of floats the length of the
            number of channels in the video. Can be overridden by the `image_std` parameter in the `preprocess` method.
            Can be overridden by the `image_std` parameter in the `preprocess` method.
        do_convert_rgb (`bool`, *optional*, defaults to `self.image_std`):
            Whether to convert the video to RGB.
        video_metadata (`VideoMetadata`, *optional*):
            Metadata of the video containing information about total duration, fps and total number of frames.
        do_sample_frames (`int`, *optional*, defaults to `self.do_sample_frames`):
            Whether to sample frames from the video before processing or to process the whole video.
        num_frames (`int`, *optional*, defaults to `self.num_frames`):
            Maximum number of frames to sample when `do_sample_frames=True`.
        fps (`int` or `float`, *optional*, defaults to `self.fps`):
            Target frames to sample per second when `do_sample_frames=True`.
        return_tensors (`str` or `TensorType`, *optional*):
            Returns stacked tensors if set to `pt, otherwise returns a list of tensors.
        data_format (`ChannelDimension` or `str`, *optional*, defaults to `ChannelDimension.FIRST`):
            The channel dimension format for the output video. Can be one of:
            - `"channels_first"` or `ChannelDimension.FIRST`: video in (num_channels, height, width) format.
            - `"channels_last"` or `ChannelDimension.LAST`: video in (height, width, num_channels) format.
            - Unset: Use the channel dimension format of the input video.
        input_data_format (`ChannelDimension` or `str`, *optional*):
            The channel dimension format for the input video. If unset, the channel dimension format is inferred
            from the input video. Can be one of:
            - `"channels_first"` or `ChannelDimension.FIRST`: video in (num_channels, height, width) format.
            - `"channels_last"` or `ChannelDimension.LAST`: video in (height, width, num_channels) format.
            - `"none"` or `ChannelDimension.NONE`: video in (height, width) format.
        device (`torch.device`, *optional*):
            The device to process the videos on. If unset, the device is inferred from the input videos.
        return_metadata (`bool`, *optional*):
            Whether to return video metadata or not.
        """


@add_start_docstrings(
    "Constructs a base VideoProcessor.",
    BASE_VIDEO_PROCESSOR_DOCSTRING,
)
@requires(backends=("vision", "torchvision"))
class BaseVideoProcessor(BaseImageProcessorFast):
    _auto_class = None

    resample = None
    image_mean = None
    image_std = None
    size = None
    size_divisor = None
    default_to_square = True
    crop_size = None
    do_resize = None
    do_center_crop = None
    do_pad = None
    do_rescale = None
    rescale_factor = 1 / 255
    do_normalize = None
    do_convert_rgb = None
    do_sample_frames = None
    fps = None
    num_frames = None
    video_metadata = None
    return_metadata = False
    valid_kwargs = VideosKwargs
    model_input_names = ["pixel_values_videos"]

    def __init__(self, **kwargs: Unpack[VideosKwargs]) -> None:
        super().__init__()

        self._processor_class = kwargs.pop("processor_class", None)

        # Additional attributes without default values
        for key, value in kwargs.items():
            try:
                setattr(self, key, value)
            except AttributeError as err:
                logger.error(f"Can't set {key} with value {value} for {self}")
                raise err

        # Prepare size related keys and turn then into `SizeDict`
        size = kwargs.pop("size", self.size)
        self.size = (
            get_size_dict(size=size, default_to_square=kwargs.pop("default_to_square", self.default_to_square))
            if size is not None
            else None
        )
        crop_size = kwargs.pop("crop_size", self.crop_size)
        self.crop_size = get_size_dict(crop_size, param_name="crop_size") if crop_size is not None else None

        # Save valid kwargs in a list for further processing
        self.model_valid_processing_keys = list(self.valid_kwargs.__annotations__.keys())
        for key in self.model_valid_processing_keys:
            if kwargs.get(key) is not None:
                setattr(self, key, kwargs[key])
            else:
                setattr(self, key, deepcopy(getattr(self, key, None)))

    def __call__(self, videos, **kwargs) -> BatchFeature:
        return self.preprocess(videos, **kwargs)

    def convert_to_rgb(
        self,
        video: "torch.Tensor",
    ) -> VideoInput:
        """
        Converts a video to RGB format.

        Args:
            video (`"torch.Tensor"`):
                The video to convert.

        Returns:
            `torch.Tensor`: The converted video.
        """

        video = F.grayscale_to_rgb(video)
        if video.shape[-3] == 3 or not (video[..., 3, :, :] < 255).any():
            return video

        # There is a transparency layer, blend it with a white background.
        # Calculate the alpha proportion for blending.
        alpha = video[..., 3, :, :] / 255.0
        video = (1 - alpha[..., None, :, :]) * 255 + alpha[..., None, :, :] * video[..., :3, :, :]
        return video

    def sample_frames(
        self,
        metadata: VideoMetadata,
        num_frames: Optional[int] = None,
        fps: Optional[Union[int, float]] = None,
        **kwargs,
    ):
        """
        Default sampling function which uniformly samples the desired number of frames between 0 and total number of frames.
        If `fps` is passed along with metadata, `fps` frames per second are sampled uniformty. Arguments `num_frames`
        and `fps` are mutually exclusive.

        Args:
            metadata (`VideoMetadata`):
                Metadata of the video containing information about total duration, fps and total number of frames.
            num_frames (`int`, *optional*):
                Maximum number of frames to sample. Defaults to `self.num_frames`.
            fps (`int` or `float`, *optional*):
                Target frames to sample per second. Defaults to `self.fps`.

        Returns:
            np.ndarray:
                Indices to sample video frames.
        """
        if fps is not None and num_frames is not None:
            raise ValueError(
                "`num_frames`, `fps`, and `sample_indices_fn` are mutually exclusive arguments, please use only one!"
            )

        num_frames = num_frames if num_frames is not None else self.num_frames
        fps = fps if fps is not None else self.fps
        total_num_frames = metadata.total_num_frames

        # If num_frames is not given but fps is, calculate num_frames from fps
        if num_frames is None and fps is not None:
            if metadata is None or metadata.fps is None:
                raise ValueError(
                    "Asked to sample `fps` frames per second but no video metadata was provided which is required when sampling with `fps`. "
                    "Please pass in `VideoMetadata` object or use a fixed `num_frames` per input video"
                )
            num_frames = int(total_num_frames / metadata.fps * fps)

        if num_frames > total_num_frames:
            raise ValueError(
                f"Video can't be sampled. The `num_frames={num_frames}` exceeds `total_num_frames={total_num_frames}`. "
            )

        if num_frames is not None:
            indices = torch.arange(0, total_num_frames, total_num_frames / num_frames).int()
        else:
            indices = torch.arange(0, total_num_frames).int()
        return indices

    def _decode_and_sample_videos(
        self,
        videos: VideoInput,
        video_metadata: Union[VideoMetadata, dict],
        do_sample_frames: Optional[bool] = None,
        sample_indices_fn: Optional[Callable] = None,
    ) -> list["torch.Tensor"]:
        """
        Decode input videos and sample frames if needed.
        """
        videos = make_batched_videos(videos)
        video_metadata = make_batched_metadata(videos, video_metadata=video_metadata)

        # Only sample frames if an array video is passed, otherwise first decode -> then sample
        if is_valid_video(videos[0]) and do_sample_frames:
            sampled_videos = []
            sampled_metadata = []
            for video, metadata in zip(videos, video_metadata):
                indices = sample_indices_fn(metadata=metadata)
                metadata.frames_indices = indices
                sampled_videos.append(video[indices])
                sampled_metadata.append(metadata)
            videos = sampled_videos
            video_metadata = sampled_metadata
        elif not is_valid_video(videos[0]):
            if isinstance(videos[0], list):
                # Videos sometimes are passed as a list of image URLs, especially through templates
                videos = [
                    torch.stack([F.pil_to_tensor(image) for image in images], dim=0)
                    for images in self.fetch_images(videos)
                ]
                if do_sample_frames:
                    raise ValueError(
                        "Sampling frames from a list of images is not supported! Set `do_sample_frames=False`."
                    )
            else:
                videos, video_metadata = self.fetch_videos(videos, sample_indices_fn=sample_indices_fn)

        return videos, video_metadata

    def _prepare_input_videos(
        self,
        videos: VideoInput,
        input_data_format: Optional[Union[str, ChannelDimension]] = None,
        device: Optional[str] = None,
    ) -> list["torch.Tensor"]:
        """
        Prepare the input videos for processing.
        """
        processed_videos = []
        for video in videos:
            # `make_batched_videos` always returns a 4D array per video
            if isinstance(video, np.ndarray):
                video = to_channel_dimension_format(video, ChannelDimension.FIRST, input_data_format)
                # not using F.to_tensor as it doesn't handle (C, H, W) numpy arrays
                video = torch.from_numpy(video).contiguous()

            if device is not None:
                video = video.to(device)

            processed_videos.append(video)
        return processed_videos

    @add_start_docstrings(
        BASE_VIDEO_PROCESSOR_DOCSTRING,
    )
    def preprocess(
        self,
        videos: VideoInput,
        **kwargs: Unpack[VideosKwargs],
    ) -> BatchFeature:
        validate_kwargs(
            captured_kwargs=kwargs.keys(),
            valid_processor_keys=list(self.valid_kwargs.__annotations__.keys()) + ["return_tensors"],
        )
        # Set default kwargs from self. This ensures that if a kwarg is not provided
        # by the user, it gets its default value from the instance, or is set to None.
        for kwarg_name in self.valid_kwargs.__annotations__:
            kwargs.setdefault(kwarg_name, getattr(self, kwarg_name, None))

        input_data_format = kwargs.pop("input_data_format")
        do_sample_frames = kwargs.pop("do_sample_frames")
        device = kwargs.pop("device")
        video_metadata = kwargs.pop("video_metadata")

        sample_indices_fn = partial(self.sample_frames, **kwargs) if do_sample_frames else None
        videos, video_metadata = self._decode_and_sample_videos(
            videos,
            video_metadata=video_metadata,
            do_sample_frames=do_sample_frames,
            sample_indices_fn=sample_indices_fn,
        )
        videos = self._prepare_input_videos(videos=videos, input_data_format=input_data_format, device=device)

        kwargs = self._further_process_kwargs(**kwargs)
        self._validate_preprocess_kwargs(**kwargs)

        # Pop kwargs that are not needed in _preprocess
        kwargs.pop("data_format")
        return_metadata = kwargs.pop("return_metadata")

        preprocessed_videos = self._preprocess(videos=videos, **kwargs)
        if return_metadata:
            preprocessed_videos["video_metadata"] = video_metadata
        return preprocessed_videos

    def _preprocess(
        self,
        videos: list["torch.Tensor"],
        do_convert_rgb: bool,
        do_resize: bool,
        size: SizeDict,
        size_divisor: Optional[int],
        interpolation: Optional["F.InterpolationMode"],
        do_center_crop: bool,
        crop_size: SizeDict,
        do_rescale: bool,
        do_pad: bool,
        rescale_factor: float,
        do_normalize: bool,
        image_mean: Optional[Union[float, list[float]]],
        image_std: Optional[Union[float, list[float]]],
        return_tensors: Optional[Union[str, TensorType]] = None,
        **kwargs,
    ) -> BatchFeature:
        # Group videos by size for batched resizing
        grouped_videos, grouped_videos_index = group_videos_by_shape(videos)
        resized_videos_grouped = {}
        for shape, stacked_videos in grouped_videos.items():
            if do_convert_rgb:
                stacked_videos = self.convert_to_rgb(stacked_videos)
            if do_resize:
                stacked_videos = self.resize(
                    stacked_videos, size=size, size_divisor=size_divisor, interpolation=interpolation
                )
            resized_videos_grouped[shape] = stacked_videos
        resized_videos = reorder_videos(resized_videos_grouped, grouped_videos_index)

        # Group videos by size for further processing
        # Needed in case do_resize is False, or resize returns videos with different sizes
        grouped_videos, grouped_videos_index = group_videos_by_shape(resized_videos)
        processed_videos_grouped = {}
        for shape, stacked_videos in grouped_videos.items():
            if do_center_crop:
                stacked_videos = self.center_crop(stacked_videos, crop_size)
            # Fused rescale and normalize
            stacked_videos = self.rescale_and_normalize(
                stacked_videos, do_rescale, rescale_factor, do_normalize, image_mean, image_std
            )
            processed_videos_grouped[shape] = stacked_videos

        processed_videos = reorder_videos(processed_videos_grouped, grouped_videos_index)
        processed_videos = torch.stack(processed_videos, dim=0) if return_tensors else processed_videos

        return BatchFeature(data={"pixel_values_videos": processed_videos}, tensor_type=return_tensors)

    @classmethod
    def from_pretrained(
        cls,
        pretrained_model_name_or_path: Union[str, os.PathLike],
        cache_dir: Optional[Union[str, os.PathLike]] = None,
        force_download: bool = False,
        local_files_only: bool = False,
        token: Optional[Union[str, bool]] = None,
        revision: str = "main",
        **kwargs,
    ):
        r"""
        Instantiate a type of [`~video_processing_utils.VideoProcessorBase`] from an video processor.

        Args:
            pretrained_model_name_or_path (`str` or `os.PathLike`):
                This can be either:

                - a string, the *model id* of a pretrained video hosted inside a model repo on
                  huggingface.co.
                - a path to a *directory* containing a video processor file saved using the
                  [`~video_processing_utils.VideoProcessorBase.save_pretrained`] method, e.g.,
                  `./my_model_directory/`.
                - a path or url to a saved video processor JSON *file*, e.g.,
                  `./my_model_directory/video_preprocessor_config.json`.
            cache_dir (`str` or `os.PathLike`, *optional*):
                Path to a directory in which a downloaded pretrained model video processor should be cached if the
                standard cache should not be used.
            force_download (`bool`, *optional*, defaults to `False`):
                Whether or not to force to (re-)download the video processor files and override the cached versions if
                they exist.
            resume_download:
                Deprecated and ignored. All downloads are now resumed by default when possible.
                Will be removed in v5 of Transformers.
            proxies (`dict[str, str]`, *optional*):
                A dictionary of proxy servers to use by protocol or endpoint, e.g., `{'http': 'foo.bar:3128',
                'http://hostname': 'foo.bar:4012'}.` The proxies are used on each request.
            token (`str` or `bool`, *optional*):
                The token to use as HTTP bearer authorization for remote files. If `True`, or not specified, will use
                the token generated when running `hf auth login` (stored in `~/.huggingface`).
            revision (`str`, *optional*, defaults to `"main"`):
                The specific model version to use. It can be a branch name, a tag name, or a commit id, since we use a
                git-based system for storing models and other artifacts on huggingface.co, so `revision` can be any
                identifier allowed by git.


                <Tip>

                To test a pull request you made on the Hub, you can pass `revision="refs/pr/<pr_number>"`.

                </Tip>

            return_unused_kwargs (`bool`, *optional*, defaults to `False`):
                If `False`, then this function returns just the final video processor object. If `True`, then this
                functions returns a `Tuple(video_processor, unused_kwargs)` where *unused_kwargs* is a dictionary
                consisting of the key/value pairs whose keys are not video processor attributes: i.e., the part of
                `kwargs` which has not been used to update `video_processor` and is otherwise ignored.
            subfolder (`str`, *optional*, defaults to `""`):
                In case the relevant files are located inside a subfolder of the model repo on huggingface.co, you can
                specify the folder name here.
            kwargs (`dict[str, Any]`, *optional*):
                The values in kwargs of any keys which are video processor attributes will be used to override the
                loaded values. Behavior concerning key/value pairs whose keys are *not* video processor attributes is
                controlled by the `return_unused_kwargs` keyword parameter.

        Returns:
            A video processor of type [`~video_processing_utils.ImagVideoProcessorBase`].

        Examples:

        ```python
        # We can't instantiate directly the base class *VideoProcessorBase* so let's show the examples on a
        # derived class: *LlavaOnevisionVideoProcessor*
        video_processor = LlavaOnevisionVideoProcessor.from_pretrained(
            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf"
        )  # Download video_processing_config from huggingface.co and cache.
        video_processor = LlavaOnevisionVideoProcessor.from_pretrained(
            "./test/saved_model/"
        )  # E.g. video processor (or model) was saved using *save_pretrained('./test/saved_model/')*
        video_processor = LlavaOnevisionVideoProcessor.from_pretrained("./test/saved_model/video_preprocessor_config.json")
        video_processor = LlavaOnevisionVideoProcessor.from_pretrained(
            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf", do_normalize=False, foo=False
        )
        assert video_processor.do_normalize is False
        video_processor, unused_kwargs = LlavaOnevisionVideoProcessor.from_pretrained(
            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf", do_normalize=False, foo=False, return_unused_kwargs=True
        )
        assert video_processor.do_normalize is False
        assert unused_kwargs == {"foo": False}
        ```"""
        kwargs["cache_dir"] = cache_dir
        kwargs["force_download"] = force_download
        kwargs["local_files_only"] = local_files_only
        kwargs["revision"] = revision

        use_auth_token = kwargs.pop("use_auth_token", None)
        if use_auth_token is not None:
            warnings.warn(
                "The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
                FutureWarning,
            )
            if token is not None:
                raise ValueError(
                    "`token` and `use_auth_token` are both specified. Please set only the argument `token`."
                )
            token = use_auth_token

        if token is not None:
            kwargs["token"] = token

        video_processor_dict, kwargs = cls.get_video_processor_dict(pretrained_model_name_or_path, **kwargs)

        return cls.from_dict(video_processor_dict, **kwargs)

    def save_pretrained(self, save_directory: Union[str, os.PathLike], push_to_hub: bool = False, **kwargs):
        """
        Save an video processor object to the directory `save_directory`, so that it can be re-loaded using the
        [`~video_processing_utils.VideoProcessorBase.from_pretrained`] class method.

        Args:
            save_directory (`str` or `os.PathLike`):
                Directory where the video processor JSON file will be saved (will be created if it does not exist).
            push_to_hub (`bool`, *optional*, defaults to `False`):
                Whether or not to push your model to the Hugging Face model hub after saving it. You can specify the
                repository you want to push to with `repo_id` (will default to the name of `save_directory` in your
                namespace).
            kwargs (`dict[str, Any]`, *optional*):
                Additional key word arguments passed along to the [`~utils.PushToHubMixin.push_to_hub`] method.
        """
        use_auth_token = kwargs.pop("use_auth_token", None)

        if use_auth_token is not None:
            warnings.warn(
                "The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
                FutureWarning,
            )
            if kwargs.get("token") is not None:
                raise ValueError(
                    "`token` and `use_auth_token` are both specified. Please set only the argument `token`."
                )
            kwargs["token"] = use_auth_token

        if os.path.isfile(save_directory):
            raise AssertionError(f"Provided path ({save_directory}) should be a directory, not a file")

        os.makedirs(save_directory, exist_ok=True)

        if push_to_hub:
            commit_message = kwargs.pop("commit_message", None)
            repo_id = kwargs.pop("repo_id", save_directory.split(os.path.sep)[-1])
            repo_id = self._create_repo(repo_id, **kwargs)
            files_timestamps = self._get_files_timestamps(save_directory)

        # If we have a custom config, we copy the file defining it in the folder and set the attributes so it can be
        # loaded from the Hub.
        if self._auto_class is not None:
            custom_object_save(self, save_directory, config=self)

        # If we save using the predefined names, we can load using `from_pretrained`
        output_video_processor_file = os.path.join(save_directory, VIDEO_PROCESSOR_NAME)

        self.to_json_file(output_video_processor_file)
        logger.info(f"Video processor saved in {output_video_processor_file}")

        if push_to_hub:
            self._upload_modified_files(
                save_directory,
                repo_id,
                files_timestamps,
                commit_message=commit_message,
                token=kwargs.get("token"),
            )

        return [output_video_processor_file]

    @classmethod
    def get_video_processor_dict(
        cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs
    ) -> tuple[dict[str, Any], dict[str, Any]]:
        """
        From a `pretrained_model_name_or_path`, resolve to a dictionary of parameters, to be used for instantiating a
        video processor of type [`~video_processing_utils.VideoProcessorBase`] using `from_dict`.

        Parameters:
            pretrained_model_name_or_path (`str` or `os.PathLike`):
                The identifier of the pre-trained checkpoint from which we want the dictionary of parameters.
            subfolder (`str`, *optional*, defaults to `""`):
                In case the relevant files are located inside a subfolder of the model repo on huggingface.co, you can
                specify the folder name here.

        Returns:
            `tuple[Dict, Dict]`: The dictionary(ies) that will be used to instantiate the video processor object.
        """
        cache_dir = kwargs.pop("cache_dir", None)
        force_download = kwargs.pop("force_download", False)
        resume_download = kwargs.pop("resume_download", None)
        proxies = kwargs.pop("proxies", None)
        token = kwargs.pop("token", None)
        use_auth_token = kwargs.pop("use_auth_token", None)
        local_files_only = kwargs.pop("local_files_only", False)
        revision = kwargs.pop("revision", None)
        subfolder = kwargs.pop("subfolder", "")

        from_pipeline = kwargs.pop("_from_pipeline", None)
        from_auto_class = kwargs.pop("_from_auto", False)

        if use_auth_token is not None:
            warnings.warn(
                "The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
                FutureWarning,
            )
            if token is not None:
                raise ValueError(
                    "`token` and `use_auth_token` are both specified. Please set only the argument `token`."
                )
            token = use_auth_token

        user_agent = {"file_type": "video processor", "from_auto_class": from_auto_class}
        if from_pipeline is not None:
            user_agent["using_pipeline"] = from_pipeline

        if is_offline_mode() and not local_files_only:
            logger.info("Offline mode: forcing local_files_only=True")
            local_files_only = True

        pretrained_model_name_or_path = str(pretrained_model_name_or_path)
        is_local = os.path.isdir(pretrained_model_name_or_path)
        if os.path.isfile(pretrained_model_name_or_path):
            resolved_video_processor_file = pretrained_model_name_or_path
            is_local = True
        elif is_remote_url(pretrained_model_name_or_path):
            video_processor_file = pretrained_model_name_or_path
            resolved_video_processor_file = download_url(pretrained_model_name_or_path)
        else:
            video_processor_file = VIDEO_PROCESSOR_NAME
            try:
                # Try to load with a new config name first and if not successfull try with the old file name
                # NOTE: we will gradually change to saving all processor configs as nested dict in PROCESSOR_NAME
                resolved_video_processor_files = [
                    resolved_file
                    for filename in [VIDEO_PROCESSOR_NAME, IMAGE_PROCESSOR_NAME, PROCESSOR_NAME]
                    if (
                        resolved_file := cached_file(
                            pretrained_model_name_or_path,
                            filename=filename,
                            cache_dir=cache_dir,
                            force_download=force_download,
                            proxies=proxies,
                            resume_download=resume_download,
                            local_files_only=local_files_only,
                            token=token,
                            user_agent=user_agent,
                            revision=revision,
                            subfolder=subfolder,
                            _raise_exceptions_for_missing_entries=False,
                        )
                    )
                    is not None
                ]
                resolved_video_processor_file = resolved_video_processor_files[0]
            except EnvironmentError:
                # Raise any environment error raise by `cached_file`. It will have a helpful error message adapted to
                # the original exception.
                raise
            except Exception:
                # For any other exception, we throw a generic error.
                raise OSError(
                    f"Can't load video processor for '{pretrained_model_name_or_path}'. If you were trying to load"
                    " it from 'https://huggingface.co/models', make sure you don't have a local directory with the"
                    f" same name. Otherwise, make sure '{pretrained_model_name_or_path}' is the correct path to a"
                    f" directory containing a {VIDEO_PROCESSOR_NAME} file"
                )

        try:
            # Load video_processor dict
            with open(resolved_video_processor_file, "r", encoding="utf-8") as reader:
                text = reader.read()
            video_processor_dict = json.loads(text)
            video_processor_dict = video_processor_dict.get("video_processor", video_processor_dict)

        except json.JSONDecodeError:
            raise OSError(
                f"It looks like the config file at '{resolved_video_processor_file}' is not a valid JSON file."
            )

        if is_local:
            logger.info(f"loading configuration file {resolved_video_processor_file}")
        else:
            logger.info(
                f"loading configuration file {video_processor_file} from cache at {resolved_video_processor_file}"
            )
        return video_processor_dict, kwargs

    @classmethod
    def from_dict(cls, video_processor_dict: dict[str, Any], **kwargs):
        """
        Instantiates a type of [`~video_processing_utils.VideoProcessorBase`] from a Python dictionary of parameters.

        Args:
            video_processor_dict (`dict[str, Any]`):
                Dictionary that will be used to instantiate the video processor object. Such a dictionary can be
                retrieved from a pretrained checkpoint by leveraging the
                [`~video_processing_utils.VideoProcessorBase.to_dict`] method.
            kwargs (`dict[str, Any]`):
                Additional parameters from which to initialize the video processor object.

        Returns:
            [`~video_processing_utils.VideoProcessorBase`]: The video processor object instantiated from those
            parameters.
        """
        video_processor_dict = video_processor_dict.copy()
        return_unused_kwargs = kwargs.pop("return_unused_kwargs", False)

        # The `size` parameter is a dict and was previously an int or tuple in feature extractors.
        # We set `size` here directly to the `video_processor_dict` so that it is converted to the appropriate
        # dict within the video processor and isn't overwritten if `size` is passed in as a kwarg.
        if "size" in kwargs and "size" in video_processor_dict:
            video_processor_dict["size"] = kwargs.pop("size")
        if "crop_size" in kwargs and "crop_size" in video_processor_dict:
            video_processor_dict["crop_size"] = kwargs.pop("crop_size")

        video_processor = cls(**video_processor_dict)

        # Update video_processor with kwargs if needed
        to_remove = []
        for key, value in kwargs.items():
            if hasattr(video_processor, key):
                setattr(video_processor, key, value)
                to_remove.append(key)
        for key in to_remove:
            kwargs.pop(key, None)

        logger.info(f"Video processor {video_processor}")
        if return_unused_kwargs:
            return video_processor, kwargs
        else:
            return video_processor

    def to_dict(self) -> dict[str, Any]:
        """
        Serializes this instance to a Python dictionary.

        Returns:
            `dict[str, Any]`: Dictionary of all the attributes that make up this video processor instance.
        """
        output = deepcopy(self.__dict__)
        output.pop("model_valid_processing_keys", None)
        output.pop("_valid_kwargs_names", None)
        output["video_processor_type"] = self.__class__.__name__

        return output

    def to_json_string(self) -> str:
        """
        Serializes this instance to a JSON string.

        Returns:
            `str`: String containing all the attributes that make up this feature_extractor instance in JSON format.
        """
        dictionary = self.to_dict()

        for key, value in dictionary.items():
            if isinstance(value, np.ndarray):
                dictionary[key] = value.tolist()

        # make sure private name "_processor_class" is correctly
        # saved as "processor_class"
        _processor_class = dictionary.pop("_processor_class", None)
        if _processor_class is not None:
            dictionary["processor_class"] = _processor_class

        return json.dumps(dictionary, indent=2, sort_keys=True) + "\n"

    def to_json_file(self, json_file_path: Union[str, os.PathLike]):
        """
        Save this instance to a JSON file.

        Args:
            json_file_path (`str` or `os.PathLike`):
                Path to the JSON file in which this image_processor instance's parameters will be saved.
        """
        with open(json_file_path, "w", encoding="utf-8") as writer:
            writer.write(self.to_json_string())

    def __repr__(self):
        return f"{self.__class__.__name__} {self.to_json_string()}"

    @classmethod
    def from_json_file(cls, json_file: Union[str, os.PathLike]):
        """
        Instantiates a video processor of type [`~video_processing_utils.VideoProcessorBase`] from the path to a JSON
        file of parameters.

        Args:
            json_file (`str` or `os.PathLike`):
                Path to the JSON file containing the parameters.

        Returns:
            A video processor of type [`~video_processing_utils.VideoProcessorBase`]: The video_processor object
            instantiated from that JSON file.
        """
        with open(json_file, "r", encoding="utf-8") as reader:
            text = reader.read()
        video_processor_dict = json.loads(text)
        return cls(**video_processor_dict)

    @classmethod
    def register_for_auto_class(cls, auto_class="AutoVideoProcessor"):
        """
        Register this class with a given auto class. This should only be used for custom video processors as the ones
        in the library are already mapped with `AutoVideoProcessor `.

        <Tip warning={true}>

        This API is experimental and may have some slight breaking changes in the next releases.

        </Tip>

        Args:
            auto_class (`str` or `type`, *optional*, defaults to `"AutoVideoProcessor "`):
                The auto class to register this new video processor with.
        """
        if not isinstance(auto_class, str):
            auto_class = auto_class.__name__

        import transformers.models.auto as auto_module

        if not hasattr(auto_module, auto_class):
            raise ValueError(f"{auto_class} is not a valid auto class.")

        cls._auto_class = auto_class

    def fetch_videos(self, video_url_or_urls: Union[str, list[str], list[list[str]]], sample_indices_fn=None):
        """
        Convert a single or a list of urls into the corresponding `np.array` objects.

        If a single url is passed, the return value will be a single object. If a list is passed a list of objects is
        returned.
        """
        backend = "torchcodec"
        if not is_torchcodec_available():
            warnings.warn(
                "`torchcodec` is not installed and cannot be used to decode the video by default. "
                "Falling back to `torchvision`. Note that `torchvision` decoding is deprecated and will be removed in future versions. "
            )
            backend = "torchvision"

        if isinstance(video_url_or_urls, list):
            return list(zip(*[self.fetch_videos(x, sample_indices_fn=sample_indices_fn) for x in video_url_or_urls]))
        else:
            return load_video(video_url_or_urls, backend=backend, sample_indices_fn=sample_indices_fn)


BaseVideoProcessor.push_to_hub = copy_func(BaseVideoProcessor.push_to_hub)
if BaseVideoProcessor.push_to_hub.__doc__ is not None:
    BaseVideoProcessor.push_to_hub.__doc__ = BaseVideoProcessor.push_to_hub.__doc__.format(
        object="video processor", object_class="AutoVideoProcessor", object_files="video processor file"
    )