可以看到700M的图片可以压缩到只有9M,并且模型推理精度只会下降0.07.有很多种压缩方式,经过大量实验qb36是最好的,默认使用这个。
@input_images:原始图片。
@mkv_files\qb36:中转文件,也就是说原始图片要先转换为.mkv文件,然后继而转换为被压缩后的图片。
@output_images:不用多说,压缩后的图片。
NOTE:只需安装ffmpeg。
👑核心代码:
python
import os
import glob
from tqdm import tqdm
class x265_encode_decode_Tool(object):
def __init__(self, quality, mkv_path, input_img_path, output_img_path) -> None:
self.quality = quality
self.mkv_path = mkv_path
self.input_img_path = input_img_path
self.output_img_path = output_img_path
self.mkvFile = ""
if not os.path.exists(self.mkv_path):
os.makedirs(self.mkv_path)
if not os.path.exists(self.output_img_path):
os.makedirs(self.output_img_path)
def run_x265_encode(self):
label_list=os.listdir(self.input_img_path)
for label in tqdm(label_list): #xxx.jpg
'''
jpg to mkv with qpxx
'''
os.chdir(self.input_img_path) # .../JPEGImages/
cmd_jpg_to_mkv="ffmpeg -i " + label + " -c:v libx265 -x265-params qp="\
+ self.quality[2:] + " "+ self.mkv_path + "/"+\
label[:len(label)-4]+".mkv"
# print(cmd_jpg_to_mkv)
os.system(cmd_jpg_to_mkv)
def run_x265_decode(self):
# '''
# mkv to jpg
# '''
label_list=os.listdir(self.input_img_path)
for label in tqdm(label_list): #xxx.jpg
os.chdir(self.mkv_path + "/" + self.mkvFile) #.../x265_VOC2007/
cmd_mkv_to_jpg = "ffmpeg -i "+label[:len(label)-4]+".mkv -r 1 \
-f image2 "+ self.output_img_path + "/" + self.mkvFile + "/" + label
# print(cmd_mkv_to_jpg)
os.system(cmd_mkv_to_jpg)
def run_x265_encode_and_decode(self):
label_list=os.listdir(self.input_img_path)
for label in tqdm(label_list): #xxx.jpg
'''
jpg to mkv with qpxx
'''
os.chdir(self.input_img_path) # .../JPEGImages/
cmd_jpg_to_mkv="ffmpeg -i " + label + " -c:v libx265 -x265-params qp="\
+ self.quality[2:] + " "+ self.mkv_path + "/"+\
label[:len(label)-4]+".mkv"
# print(cmd_jpg_to_mkv)
os.system(cmd_jpg_to_mkv)
# '''
# mkv to jpg
# '''
os.chdir(self.mkv_path + "/" + self.mkvFile) #.../x265_VOC2007/
cmd_mkv_to_jpg = "ffmpeg -i "+label[:len(label)-4]+".mkv -r 1 \
-f image2 "+ self.output_img_path + "/" + self.mkvFile + "/" + label
# print(cmd_mkv_to_jpg)
os.system(cmd_mkv_to_jpg)
👑调用接口:
python
from x265_encode_and_decode import x265_encode_decode_Tool
if __name__ == "__main__":
quality = 'qb36'
mkv_path = '/data2/personal/jiangziliang/projects/x265_imageCompressor/mkv_files/%s' % quality
input_img_path = r'/data2/personal/jiangziliang/projects/x265_imageCompressor/input_images'
output_img_path = r'/data2/personal/jiangziliang/projects/x265_imageCompressor/output_images'
x265Tools = x265_encode_decode_Tool(
quality, mkv_path, input_img_path, output_img_path)
'''
jpeg -> mkv
'''
# x265Tools.run_x265_encode()
'''
mkv -> jpeg
'''
# x265Tools.run_x265_decode()
'''
jpeg -> mkv -> jpeg
'''
# x265Tools.run_x265_encode_and_decode()