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# coding: utf-8
"""
functions for processing video
"""
import os.path as osp
import numpy as np
import subprocess
import imageio
import cv2
from rich.progress import track
from .helper import prefix
from .rprint import rprint as print
def exec_cmd(cmd):
subprocess.run(cmd, shell=True, check=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
def images2video(images, wfp, **kwargs):
fps = kwargs.get('fps', 30)
video_format = kwargs.get('format', 'mp4') # default is mp4 format
codec = kwargs.get('codec', 'libx264') # default is libx264 encoding
quality = kwargs.get('quality') # video quality
pixelformat = kwargs.get('pixelformat', 'yuv420p') # video pixel format
image_mode = kwargs.get('image_mode', 'rgb')
macro_block_size = kwargs.get('macro_block_size', 2)
ffmpeg_params = ['-crf', str(kwargs.get('crf', 18))]
writer = imageio.get_writer(
wfp, fps=fps, format=video_format,
codec=codec, quality=quality, ffmpeg_params=ffmpeg_params, pixelformat=pixelformat, macro_block_size=macro_block_size
)
n = len(images)
for i in track(range(n), description='writing', transient=True):
if image_mode.lower() == 'bgr':
writer.append_data(images[i][..., ::-1])
else:
writer.append_data(images[i])
writer.close()
# print(f':smiley: Dump to {wfp}\n', style="bold green")
print(f'Dump to {wfp}\n')
def video2gif(video_fp, fps=30, size=256):
if osp.exists(video_fp):
d = osp.split(video_fp)[0]
fn = prefix(osp.basename(video_fp))
palette_wfp = osp.join(d, 'palette.png')
gif_wfp = osp.join(d, f'{fn}.gif')
# generate the palette
cmd = f'ffmpeg -i {video_fp} -vf "fps={fps},scale={size}:-1:flags=lanczos,palettegen" {palette_wfp} -y'
exec_cmd(cmd)
# use the palette to generate the gif
cmd = f'ffmpeg -i {video_fp} -i {palette_wfp} -filter_complex "fps={fps},scale={size}:-1:flags=lanczos[x];[x][1:v]paletteuse" {gif_wfp} -y'
exec_cmd(cmd)
else:
print(f'video_fp: {video_fp} not exists!')
def merge_audio_video(video_fp, audio_fp, wfp):
if osp.exists(video_fp) and osp.exists(audio_fp):
cmd = f'ffmpeg -i {video_fp} -i {audio_fp} -c:v copy -c:a aac {wfp} -y'
exec_cmd(cmd)
print(f'merge {video_fp} and {audio_fp} to {wfp}')
else:
print(f'video_fp: {video_fp} or audio_fp: {audio_fp} not exists!')
def blend(img: np.ndarray, mask: np.ndarray, background_color=(255, 255, 255)):
mask_float = mask.astype(np.float32) / 255.
background_color = np.array(background_color).reshape([1, 1, 3])
bg = np.ones_like(img) * background_color
img = np.clip(mask_float * img + (1 - mask_float) * bg, 0, 255).astype(np.uint8)
return img
def concat_frames(I_p_lst, driving_rgb_lst, img_rgb):
# TODO: add more concat style, e.g., left-down corner driving
out_lst = []
for idx, _ in track(enumerate(I_p_lst), total=len(I_p_lst), description='Concatenating result...'):
source_image_drived = I_p_lst[idx]
image_drive = driving_rgb_lst[idx]
# resize images to match source_image_drived shape
h, w, _ = source_image_drived.shape
image_drive_resized = cv2.resize(image_drive, (w, h))
img_rgb_resized = cv2.resize(img_rgb, (w, h))
# concatenate images horizontally
frame = np.concatenate((image_drive_resized, img_rgb_resized, source_image_drived), axis=1)
out_lst.append(frame)
return out_lst
class VideoWriter:
def __init__(self, **kwargs):
self.fps = kwargs.get('fps', 30)
self.wfp = kwargs.get('wfp', 'video.mp4')
self.video_format = kwargs.get('format', 'mp4')
self.codec = kwargs.get('codec', 'libx264')
self.quality = kwargs.get('quality')
self.pixelformat = kwargs.get('pixelformat', 'yuv420p')
self.image_mode = kwargs.get('image_mode', 'rgb')
self.ffmpeg_params = kwargs.get('ffmpeg_params')
self.writer = imageio.get_writer(
self.wfp, fps=self.fps, format=self.video_format,
codec=self.codec, quality=self.quality,
ffmpeg_params=self.ffmpeg_params, pixelformat=self.pixelformat
)
def write(self, image):
if self.image_mode.lower() == 'bgr':
self.writer.append_data(image[..., ::-1])
else:
self.writer.append_data(image)
def close(self):
if self.writer is not None:
self.writer.close()
def change_video_fps(input_file, output_file, fps=20, codec='libx264', crf=5):
cmd = f"ffmpeg -i {input_file} -c:v {codec} -crf {crf} -r {fps} {output_file} -y"
exec_cmd(cmd)
def get_fps(filepath):
import ffmpeg
probe = ffmpeg.probe(filepath)
video_stream = next((stream for stream in probe['streams'] if stream['codec_type'] == 'video'), None)
fps = eval(video_stream['avg_frame_rate'])
return fps
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