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407 lines
13 KiB
Python
407 lines
13 KiB
Python
import _thread
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import logging
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import os
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import shutil
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import time
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from functools import lru_cache
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from queue import Queue
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from typing import List
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import cv2
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import numpy as np
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import torch
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from PIL import Image
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from torch.nn import functional as F
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from tqdm import tqdm
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from imaginairy.utils import get_device
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from imaginairy.utils.downloads import get_cached_url_path
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from .msssim import ssim_matlab
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from .RIFE_HDv3 import Model
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logger = logging.getLogger(__name__)
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def transfer_audio(sourceVideo, targetVideo):
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tempAudioFileName = "./temp/audio.mkv"
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# split audio from original video file and store in "temp" directory
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if True:
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# clear old "temp" directory if it exits
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if os.path.isdir("temp"):
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# remove temp directory
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shutil.rmtree("temp")
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# create new "temp" directory
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os.makedirs("temp")
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# extract audio from video
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os.system(f'ffmpeg -y -i "{sourceVideo}" -c:a copy -vn {tempAudioFileName}')
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targetNoAudio = (
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os.path.splitext(targetVideo)[0] + "_noaudio" + os.path.splitext(targetVideo)[1]
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)
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os.rename(targetVideo, targetNoAudio)
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# combine audio file and new video file
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os.system(
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f'ffmpeg -y -i "{targetNoAudio}" -i {tempAudioFileName} -c copy "{targetVideo}"'
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)
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if (
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os.path.getsize(targetVideo) == 0
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): # if ffmpeg failed to merge the video and audio together try converting the audio to aac
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tempAudioFileName = "./temp/audio.m4a"
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os.system(
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f'ffmpeg -y -i "{sourceVideo}" -c:a aac -b:a 160k -vn {tempAudioFileName}'
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)
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os.system(
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f'ffmpeg -y -i "{targetNoAudio}" -i {tempAudioFileName} -c copy "{targetVideo}"'
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)
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if (
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os.path.getsize(targetVideo) == 0
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): # if aac is not supported by selected format
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os.rename(targetNoAudio, targetVideo)
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print("Audio transfer failed. Interpolated video will have no audio")
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else:
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print(
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"Lossless audio transfer failed. Audio was transcoded to AAC (M4A) instead."
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)
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# remove audio-less video
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os.remove(targetNoAudio)
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else:
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os.remove(targetNoAudio)
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# remove temp directory
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shutil.rmtree("temp")
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RIFE_WEIGHTS_URL = "https://huggingface.co/imaginairy/rife-interpolation/resolve/26442e52cc30b88c5cb490702647b8de9aaee8a7/rife-flownet-4.13.2.safetensors"
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@lru_cache(maxsize=1)
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def load_rife_model(model_path=None, version=4.13, device=None):
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if model_path is None:
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model_path = RIFE_WEIGHTS_URL
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model_path = get_cached_url_path(model_path)
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device = device if device else get_device()
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model = Model()
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model.load_model(model_path, version=version)
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model.eval()
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model.flownet.to(device)
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return model
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def make_inference(I0, I1, n, *, model, scale):
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if model.version >= 3.9:
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res = []
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for i in range(n):
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res.append(model.inference(I0, I1, (i + 1) * 1.0 / (n + 1), scale))
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return res
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else:
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middle = model.inference(I0, I1, scale)
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if n == 1:
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return [middle]
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first_half = make_inference(I0, middle, n=n // 2, model=model, scale=scale)
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second_half = make_inference(middle, I1, n=n // 2, model=model, scale=scale)
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if n % 2:
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return [*first_half, middle, *second_half]
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else:
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return [*first_half, *second_half]
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def interpolate_video_file(
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video_path: str | None = None,
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images_source_path: str | None = None,
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scale: float = 1.0,
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vid_out_name: str | None = None,
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target_fps: float | None = None,
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fps_multiplier: int = 2,
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model_weights_path: str | None = None,
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fp16: bool = False,
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montage: bool = False,
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png_out: bool = False,
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output_extension: str = "mp4",
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device=None,
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):
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assert video_path is not None or images_source_path is not None
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assert scale in [0.25, 0.5, 1.0, 2.0, 4.0]
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device = device if device else get_device()
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if images_source_path is not None:
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png_out = True
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torch.set_grad_enabled(False)
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if torch.cuda.is_available():
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torch.backends.cudnn.enabled = True
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torch.backends.cudnn.benchmark = True
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if fp16:
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torch.set_default_tensor_type(torch.cuda.HalfTensor) # type: ignore
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model = load_rife_model(model_weights_path, version=4.13)
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logger.info(f"Loaded RIFE from {model_weights_path}")
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if video_path is not None:
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import skvideo.io
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videoCapture = cv2.VideoCapture(video_path)
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fps = videoCapture.get(cv2.CAP_PROP_FPS)
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tot_frame = videoCapture.get(cv2.CAP_PROP_FRAME_COUNT)
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videoCapture.release()
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if target_fps is None:
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fpsNotAssigned = True
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target_fps = fps * fps_multiplier
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else:
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fpsNotAssigned = False
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videogen = skvideo.io.vreader(video_path)
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lastframe = next(videogen)
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fourcc = cv2.VideoWriter_fourcc("m", "p", "4", "v") # type: ignore
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video_path_wo_ext, ext = os.path.splitext(video_path)
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print(
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f"{video_path_wo_ext}.{output_extension}, {tot_frame} frames in total, {fps}FPS to {target_fps}FPS"
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)
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if png_out is False and fpsNotAssigned is True:
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print("The audio will be merged after interpolation process")
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else:
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print("Will not merge audio because using png or fps flag!")
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else:
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assert images_source_path is not None
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videogen = []
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for f in os.listdir(images_source_path):
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if "png" in f:
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videogen.append(f)
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tot_frame = len(videogen)
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videogen.sort(key=lambda x: int(x[:-4]))
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lastframe = cv2.imread(
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os.path.join(images_source_path, videogen[0]), cv2.IMREAD_UNCHANGED
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)[:, :, ::-1].copy()
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videogen = videogen[1:]
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h, w, _ = lastframe.shape
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vid_out = None
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if png_out:
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if not os.path.exists("vid_out"):
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os.mkdir("vid_out")
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else:
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if vid_out_name is None:
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assert video_path_wo_ext is not None
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assert target_fps is not None
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vid_out_name = f"{video_path_wo_ext}_{fps_multiplier}X_{int(np.round(target_fps))}fps.{output_extension}"
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vid_out = cv2.VideoWriter(vid_out_name, fourcc, target_fps, (w, h)) # type: ignore
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def clear_write_buffer(png_out, write_buffer):
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cnt = 0
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while True:
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item = write_buffer.get()
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if item is None:
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break
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if png_out:
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cv2.imwrite(f"vid_out/{cnt:0>7d}.png", item[:, :, ::-1])
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cnt += 1
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else:
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vid_out.write(item[:, :, ::-1])
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def build_read_buffer(img, montage, read_buffer, videogen):
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try:
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for frame in videogen:
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if img is not None:
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frame = cv2.imread(os.path.join(img, frame), cv2.IMREAD_UNCHANGED)[
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:, :, ::-1
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].copy()
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if montage:
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frame = frame[:, left : left + w]
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read_buffer.put(frame)
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except Exception as e: # noqa
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print(f"skipping frame due to error: {e}")
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read_buffer.put(None)
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def pad_image(img):
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if fp16:
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return F.pad(img, padding).half()
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else:
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return F.pad(img, padding)
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if montage:
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left = w // 4
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w = w // 2
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tmp = max(128, int(128 / scale))
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ph = ((h - 1) // tmp + 1) * tmp
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pw = ((w - 1) // tmp + 1) * tmp
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padding = (0, pw - w, 0, ph - h)
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pbar = tqdm(total=tot_frame)
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if montage:
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lastframe = lastframe[:, left : left + w]
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write_buffer: Queue = Queue(maxsize=500)
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read_buffer: Queue = Queue(maxsize=500)
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_thread.start_new_thread(
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build_read_buffer, (images_source_path, montage, read_buffer, videogen)
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)
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_thread.start_new_thread(clear_write_buffer, (png_out, write_buffer))
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I1 = (
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torch.from_numpy(np.transpose(lastframe, (2, 0, 1)))
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.to(device, non_blocking=True)
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.unsqueeze(0)
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.float()
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/ 255.0
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)
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I1 = pad_image(I1)
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temp = None # save lastframe when processing static frame
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while True:
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if temp is not None:
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frame = temp
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temp = None
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else:
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frame = read_buffer.get()
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if frame is None:
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break
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I0 = I1
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I1 = (
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torch.from_numpy(np.transpose(frame, (2, 0, 1)))
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.to(device, non_blocking=True)
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.unsqueeze(0)
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.float()
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/ 255.0
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)
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I1 = pad_image(I1)
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I0_small = F.interpolate(I0, (32, 32), mode="bilinear", align_corners=False)
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I1_small = F.interpolate(I1, (32, 32), mode="bilinear", align_corners=False)
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ssim = ssim_matlab(I0_small[:, :3], I1_small[:, :3])
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break_flag = False
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if ssim > 0.996:
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frame = read_buffer.get() # read a new frame
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if frame is None:
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break_flag = True
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frame = lastframe
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else:
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temp = frame
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I1 = (
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torch.from_numpy(np.transpose(frame, (2, 0, 1)))
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.to(device, non_blocking=True)
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.unsqueeze(0)
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.float()
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/ 255.0
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)
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I1 = pad_image(I1)
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I1 = model.inference(I0, I1, scale)
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I1_small = F.interpolate(I1, (32, 32), mode="bilinear", align_corners=False)
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ssim = ssim_matlab(I0_small[:, :3], I1_small[:, :3])
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frame = (I1[0] * 255).byte().cpu().numpy().transpose(1, 2, 0)[:h, :w]
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if ssim < 0.2:
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output = []
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for i in range(fps_multiplier - 1):
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output.append(I0)
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"""
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output = []
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step = 1 / fps_multiplier
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alpha = 0
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for i in range(fps_multiplier - 1):
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alpha += step
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beta = 1-alpha
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output.append(torch.from_numpy(np.transpose((cv2.addWeighted(frame[:, :, ::-1], alpha, lastframe[:, :, ::-1], beta, 0)[:, :, ::-1].copy()), (2,0,1))).to(device, non_blocking=True).unsqueeze(0).float() / 255.)
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"""
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else:
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output = make_inference(
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I0, I1, fps_multiplier - 1, model=model, scale=scale
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)
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if montage:
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write_buffer.put(np.concatenate((lastframe, lastframe), 1))
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for mid in output:
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mid = (mid[0] * 255.0).byte().cpu().numpy().transpose(1, 2, 0)
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write_buffer.put(np.concatenate((lastframe, mid[:h, :w]), 1))
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else:
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write_buffer.put(lastframe)
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for mid in output:
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mid = (mid[0] * 255.0).byte().cpu().numpy().transpose(1, 2, 0)
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write_buffer.put(mid[:h, :w])
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pbar.update(1)
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lastframe = frame
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if break_flag:
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break
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if montage:
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write_buffer.put(np.concatenate((lastframe, lastframe), 1))
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else:
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write_buffer.put(lastframe)
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while not write_buffer.empty():
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time.sleep(0.1)
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pbar.close()
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if vid_out is not None:
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vid_out.release()
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assert vid_out_name is not None
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# move audio to new video file if appropriate
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if png_out is False and fpsNotAssigned is True and video_path is not None:
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try:
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transfer_audio(video_path, vid_out_name)
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except Exception as e: # noqa
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logger.info(
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f"Audio transfer failed. Interpolated video will have no audio. {e}"
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)
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targetNoAudio = (
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os.path.splitext(vid_out_name)[0]
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+ "_noaudio"
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+ os.path.splitext(vid_out_name)[1]
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)
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os.rename(targetNoAudio, vid_out_name)
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def pad_image(img, scale):
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tmp = max(128, int(128 / scale))
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ph, pw = (
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((img.shape[1] - 1) // tmp + 1) * tmp,
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((img.shape[2] - 1) // tmp + 1) * tmp,
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)
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padding = (0, pw - img.shape[2], 0, ph - img.shape[1])
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return F.pad(img, padding)
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def interpolate_images(
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image_list,
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scale=1.0,
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fps_multiplier=2,
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model_weights_path=None,
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device=None,
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) -> List[Image.Image]:
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assert scale in [0.25, 0.5, 1.0, 2.0, 4.0]
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torch.set_grad_enabled(False)
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device = device if device else get_device()
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model = load_rife_model(model_weights_path, version=4.13)
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interpolated_images = []
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for i in range(len(image_list) - 1):
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I0 = image_to_tensor(image_list[i], device)
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I1 = image_to_tensor(image_list[i + 1], device)
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# I0, I1 = pad_image(I0, scale), pad_image(I1, scale)
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interpolated = make_inference(
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I0, I1, n=fps_multiplier - 1, model=model, scale=scale
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)
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interpolated_images.append(image_list[i])
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for img in interpolated:
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img = (img[0] * 255.0).byte().cpu().numpy().transpose(1, 2, 0)
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interpolated_images.append(Image.fromarray(img))
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interpolated_images.append(image_list[-1])
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return interpolated_images
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def image_to_tensor(image, device):
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"""
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Converts a PIL image to a PyTorch tensor.
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Args:
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- image (PIL.Image): The image to convert.
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- device (torch.device): The device to use (CPU or CUDA).
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Returns:
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- torch.Tensor: The image converted to a PyTorch tensor.
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"""
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tensor = torch.from_numpy(np.array(image).transpose((2, 0, 1)))
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tensor = tensor.to(device, non_blocking=True).unsqueeze(0).float() / 255.0
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return tensor
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