Python实现GIF动图以及视频卡通化详解
时间：2022-08-07 08:59:26|栏目：Python代码|点击： 次
前言
参考文章：Python实现照片卡通化
我继续魔改一下，让该模型可以支持将gif动图或者视频，也做成卡通化效果。毕竟一张图可以那就带边视频也可以，没毛病。所以继给次元壁来了一拳，我在加两脚。
项目github地址：github地址
环境依赖
除了参考文章中的依赖，还需要加一些其他依赖，requirements.txt如下：
其他环境不太清楚的，可以看我前言链接地址的文章，有具体说明。
核心代码
不废话了，先上gif代码。
gif动图卡通化
实现代码如下：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/12/5 18:10
# @Author : 剑客阿良_ALiang
# @Site :
# @File : gif_cartoon_tool.py
# !/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/12/5 0:26
# @Author : 剑客阿良_ALiang
# @Site :
# @File : video_cartoon_tool.py
# !/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/12/4 22:34
# @Author : 剑客阿良_ALiang
# @Site :
# @File : image_cartoon_tool.py
from PIL import Image, ImageEnhance, ImageSequence
import torch
from torchvision.transforms.functional import to_tensor, to_pil_image
from torch import nn
import os
import torch.nn.functional as F
import uuid
import imageio
# -------------------------- hy add 01 --------------------------
class ConvNormLReLU(nn.Sequential):
def __init__(self, in_ch, out_ch, kernel_size=3, stride=1, padding=1, pad_mode="reflect", groups=1, bias=False):
pad_layer = {
"zero": nn.ZeroPad2d,
"same": nn.ReplicationPad2d,
"reflect": nn.ReflectionPad2d,
}
if pad_mode not in pad_layer:
raise NotImplementedError
super(ConvNormLReLU, self).__init__(
pad_layer[pad_mode](padding),
nn.Conv2d(in_ch, out_ch, kernel_size=kernel_size, stride=stride, padding=0, groups=groups, bias=bias),
nn.GroupNorm(num_groups=1, num_channels=out_ch, affine=True),
nn.LeakyReLU(0.2, inplace=True)
)
class InvertedResBlock(nn.Module):
def __init__(self, in_ch, out_ch, expansion_ratio=2):
super(InvertedResBlock, self).__init__()
self.use_res_connect = in_ch == out_ch
bottleneck = int(round(in_ch * expansion_ratio))
layers = []
if expansion_ratio != 1:
layers.append(ConvNormLReLU(in_ch, bottleneck, kernel_size=1, padding=0))
# dw
layers.append(ConvNormLReLU(bottleneck, bottleneck, groups=bottleneck, bias=True))
# pw
layers.append(nn.Conv2d(bottleneck, out_ch, kernel_size=1, padding=0, bias=False))
layers.append(nn.GroupNorm(num_groups=1, num_channels=out_ch, affine=True))
self.layers = nn.Sequential(*layers)
def forward(self, input):
out = self.layers(input)
if self.use_res_connect:
out = input + out
return out
class Generator(nn.Module):
def __init__(self, ):
super().__init__()
self.block_a = nn.Sequential(
ConvNormLReLU(3, 32, kernel_size=7, padding=3),
ConvNormLReLU(32, 64, stride=2, padding=(0, 1, 0, 1)),
ConvNormLReLU(64, 64)
)
self.block_b = nn.Sequential(
ConvNormLReLU(64, 128, stride=2, padding=(0, 1, 0, 1)),
ConvNormLReLU(128, 128)
)
self.block_c = nn.Sequential(
ConvNormLReLU(128, 128),
InvertedResBlock(128, 256, 2),
InvertedResBlock(256, 256, 2),
InvertedResBlock(256, 256, 2),
InvertedResBlock(256, 256, 2),
ConvNormLReLU(256, 128),
)
self.block_d = nn.Sequential(
ConvNormLReLU(128, 128),
ConvNormLReLU(128, 128)
)
self.block_e = nn.Sequential(
ConvNormLReLU(128, 64),
ConvNormLReLU(64, 64),
ConvNormLReLU(64, 32, kernel_size=7, padding=3)
)
self.out_layer = nn.Sequential(
nn.Conv2d(32, 3, kernel_size=1, stride=1, padding=0, bias=False),
nn.Tanh()
)
def forward(self, input, align_corners=True):
out = self.block_a(input)
half_size = out.size()[-2:]
out = self.block_b(out)
out = self.block_c(out)
if align_corners:
out = F.interpolate(out, half_size, mode="bilinear", align_corners=True)
else:
out = F.interpolate(out, scale_factor=2, mode="bilinear", align_corners=False)
out = self.block_d(out)
if align_corners:
out = F.interpolate(out, input.size()[-2:], mode="bilinear", align_corners=True)
else:
out = F.interpolate(out, scale_factor=2, mode="bilinear", align_corners=False)
out = self.block_e(out)
out = self.out_layer(out)
return out
# -------------------------- hy add 02 --------------------------
def handle(gif_path: str, output_dir: str, type: int, device='cpu'):
_ext = os.path.basename(gif_path).strip().split('.')[-1]
if type == 1:
_checkpoint = './weights/paprika.pt'
elif type == 2:
_checkpoint = './weights/face_paint_512_v1.pt'
elif type == 3:
_checkpoint = './weights/face_paint_512_v2.pt'
elif type == 4:
_checkpoint = './weights/celeba_distill.pt'
else:
raise Exception('type not support')
os.makedirs(output_dir, exist_ok=True)
net = Generator()
net.load_state_dict(torch.load(_checkpoint, map_location="cpu"))
net.to(device).eval()
result = os.path.join(output_dir, '{}.{}'.format(uuid.uuid1().hex, _ext))
img = Image.open(gif_path)
out_images = []
for frame in ImageSequence.Iterator(img):
frame = frame.convert("RGB")
with torch.no_grad():
image = to_tensor(frame).unsqueeze(0) * 2 - 1
out = net(image.to(device), False).cpu()
out = out.squeeze(0).clip(-1, 1) * 0.5 + 0.5
out = to_pil_image(out)
out_images.append(out)
# out_images[0].save(result, save_all=True, loop=True, append_images=out_images[1:], duration=100)
imageio.mimsave(result, out_images, fps=15)
return result
if __name__ == '__main__':
print(handle('samples/gif/128.gif', 'samples/gif_result/', 3, 'cuda'))
代码说明：
1、主要的handle方法入参分别为：gif地址、输出目录、类型、设备使用（默认cpu，可选cuda使用显卡）。
2、类型主要是选择模型，最好用3，人像处理更生动一些。
执行验证一下
下面是我准备的gif素材
执行结果如下
看一下效果
哈哈，有点意思哦。
视频卡通化
实现代码如下：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/12/5 0:26
# @Author : 剑客阿良_ALiang
# @Site :
# @File : video_cartoon_tool.py
# !/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/12/4 22:34
# @Author : 剑客阿良_ALiang
# @Site :
# @File : image_cartoon_tool.py
from PIL import Image, ImageEnhance
import torch
from torchvision.transforms.functional import to_tensor, to_pil_image
from torch import nn
import os
import torch.nn.functional as F
import uuid
import cv2
import numpy as np
import time
from ffmpy import FFmpeg
# -------------------------- hy add 01 --------------------------
class ConvNormLReLU(nn.Sequential):
def __init__(self, in_ch, out_ch, kernel_size=3, stride=1, padding=1, pad_mode="reflect", groups=1, bias=False):
pad_layer = {
"zero": nn.ZeroPad2d,
"same": nn.ReplicationPad2d,
"reflect": nn.ReflectionPad2d,
}
if pad_mode not in pad_layer:
raise NotImplementedError
super(ConvNormLReLU, self).__init__(
pad_layer[pad_mode](padding),
nn.Conv2d(in_ch, out_ch, kernel_size=kernel_size, stride=stride, padding=0, groups=groups, bias=bias),
nn.GroupNorm(num_groups=1, num_channels=out_ch, affine=True),
nn.LeakyReLU(0.2, inplace=True)
)
class InvertedResBlock(nn.Module):
def __init__(self, in_ch, out_ch, expansion_ratio=2):
super(InvertedResBlock, self).__init__()
self.use_res_connect = in_ch == out_ch
bottleneck = int(round(in_ch * expansion_ratio))
layers = []
if expansion_ratio != 1:
layers.append(ConvNormLReLU(in_ch, bottleneck, kernel_size=1, padding=0))
# dw
layers.append(ConvNormLReLU(bottleneck, bottleneck, groups=bottleneck, bias=True))
# pw
layers.append(nn.Conv2d(bottleneck, out_ch, kernel_size=1, padding=0, bias=False))
layers.append(nn.GroupNorm(num_groups=1, num_channels=out_ch, affine=True))
self.layers = nn.Sequential(*layers)
def forward(self, input):
out = self.layers(input)
if self.use_res_connect:
out = input + out
return out
class Generator(nn.Module):
def __init__(self, ):
super().__init__()
self.block_a = nn.Sequential(
ConvNormLReLU(3, 32, kernel_size=7, padding=3),
ConvNormLReLU(32, 64, stride=2, padding=(0, 1, 0, 1)),
ConvNormLReLU(64, 64)
)
self.block_b = nn.Sequential(
ConvNormLReLU(64, 128, stride=2, padding=(0, 1, 0, 1)),
ConvNormLReLU(128, 128)
)
self.block_c = nn.Sequential(
ConvNormLReLU(128, 128),
InvertedResBlock(128, 256, 2),
InvertedResBlock(256, 256, 2),
InvertedResBlock(256, 256, 2),
InvertedResBlock(256, 256, 2),
ConvNormLReLU(256, 128),
)
self.block_d = nn.Sequential(
ConvNormLReLU(128, 128),
ConvNormLReLU(128, 128)
)
self.block_e = nn.Sequential(
ConvNormLReLU(128, 64),
ConvNormLReLU(64, 64),
ConvNormLReLU(64, 32, kernel_size=7, padding=3)
)
self.out_layer = nn.Sequential(
nn.Conv2d(32, 3, kernel_size=1, stride=1, padding=0, bias=False),
nn.Tanh()
)
def forward(self, input, align_corners=True):
out = self.block_a(input)
half_size = out.size()[-2:]
out = self.block_b(out)
out = self.block_c(out)
if align_corners:
out = F.interpolate(out, half_size, mode="bilinear", align_corners=True)
else:
out = F.interpolate(out, scale_factor=2, mode="bilinear", align_corners=False)
out = self.block_d(out)
if align_corners:
out = F.interpolate(out, input.size()[-2:], mode="bilinear", align_corners=True)
else:
out = F.interpolate(out, scale_factor=2, mode="bilinear", align_corners=False)
out = self.block_e(out)
out = self.out_layer(out)
return out
# -------------------------- hy add 02 --------------------------
def handle(video_path: str, output_dir: str, type: int, fps: int, device='cpu'):
_ext = os.path.basename(video_path).strip().split('.')[-1]
if type == 1:
_checkpoint = './weights/paprika.pt'
elif type == 2:
_checkpoint = './weights/face_paint_512_v1.pt'
elif type == 3:
_checkpoint = './weights/face_paint_512_v2.pt'
elif type == 4:
_checkpoint = './weights/celeba_distill.pt'
else:
raise Exception('type not support')
os.makedirs(output_dir, exist_ok=True)
# 获取视频音频
_audio = extract(video_path, output_dir, 'wav')
net = Generator()
net.load_state_dict(torch.load(_checkpoint, map_location="cpu"))
net.to(device).eval()
result = os.path.join(output_dir, '{}.{}'.format(uuid.uuid1().hex, _ext))
capture = cv2.VideoCapture(video_path)
size = (int(capture.get(cv2.CAP_PROP_FRAME_WIDTH)), int(capture.get(cv2.CAP_PROP_FRAME_HEIGHT)))
print(size)
videoWriter = cv2.VideoWriter(result, cv2.VideoWriter_fourcc(*'mp4v'), fps, size)
cul = 0
with torch.no_grad():
while True:
ret, frame = capture.read()
if ret:
print(ret)
image = to_tensor(frame).unsqueeze(0) * 2 - 1
out = net(image.to(device), False).cpu()
out = out.squeeze(0).clip(-1, 1) * 0.5 + 0.5
out = to_pil_image(out)
contrast_enhancer = ImageEnhance.Contrast(out)
img_enhanced_image = contrast_enhancer.enhance(2)
enhanced_image = np.asarray(img_enhanced_image)
videoWriter.write(enhanced_image)
cul += 1
print('第{}张图'.format(cul))
else:
break
videoWriter.release()
# 视频添加原音频
_final_video = video_add_audio(result, _audio, output_dir)
return _final_video
# -------------------------- hy add 03 --------------------------
def extract(video_path: str, tmp_dir: str, ext: str):
file_name = '.'.join(os.path.basename(video_path).split('.')[0:-1])
print('文件名:{}，提取音频'.format(file_name))
if ext == 'mp3':
return _run_ffmpeg(video_path, os.path.join(tmp_dir, '{}.{}'.format(uuid.uuid1().hex, ext)), 'mp3')
if ext == 'wav':
return _run_ffmpeg(video_path, os.path.join(tmp_dir, '{}.{}'.format(uuid.uuid1().hex, ext)), 'wav')
def _run_ffmpeg(video_path: str, audio_path: str, format: str):
ff = FFmpeg(inputs={video_path: None},
outputs={audio_path: '-f {} -vn'.format(format)})
print(ff.cmd)
ff.run()
return audio_path
# 视频添加音频
def video_add_audio(video_path: str, audio_path: str, output_dir: str):
_ext_video = os.path.basename(video_path).strip().split('.')[-1]
_ext_audio = os.path.basename(audio_path).strip().split('.')[-1]
if _ext_audio not in ['mp3', 'wav']:
raise Exception('audio format not support')
_codec = 'copy'
if _ext_audio == 'wav':
_codec = 'aac'
result = os.path.join(
output_dir, '{}.{}'.format(
uuid.uuid4(), _ext_video))
ff = FFmpeg(
inputs={video_path: None, audio_path: None},
outputs={result: '-map 0:v -map 1:a -c:v copy -c:a {} -shortest'.format(_codec)})
print(ff.cmd)
ff.run()
return result
if __name__ == '__main__':
print(handle('samples/video/981.mp4', 'samples/video_result/', 3, 25, 'cuda'))
代码说明
1、主要的实现方法入参分别为：视频地址、输出目录、类型、fps（帧率）、设备类型（默认cpu，可选择cuda显卡模式）。
2、类型主要是选择模型，最好用3，人像处理更生动一些。
3、代码设计思路：先将视频音频提取出来、将视频逐帧处理后写入新视频、新视频和原视频音频融合。
关于如何视频提取音频可以参考我的另一篇文章：python 提取视频中的音频
关于如何视频融合音频可以参考我的另一篇文章：Python 视频添加音频
4、视频中间会产生临时文件，没有清理，如需要可以修改代码自行清理。
验证一下
下面是我准备的视频素材截图，我会上传到github上。
执行结果
看看效果截图
还是很不错的哦。
总结
这次可不是没什么好总结的，总结的东西蛮多的。首先我说一下这个开源项目目前模型的一些问题。
1、我测试了不少图片，总的来说对亚洲人的脸型不能很好的卡通化，但是欧美的脸型都比较好。所以还是训练的数据不是很够，但是能理解，毕竟要专门做卡通化的标注数据想想就是蛮头疼的事。所以我建议大家在使用的时候，多关注一下项目是否更新了最新的模型。
2、视频一但有字幕，会对字幕也做处理。所以可以考虑找一些视频和字幕分开的素材，效果会更好一些。
