小编给大家分享一下Python怎么实现修改图片分辨率,希望大家阅读完这篇文章之后都有所收获,下面让我们一起去探讨吧!
ffmpeg环境安装,可以参考:windows ffmpeg安装部署
ffmpy安装:
pip install ffmpy -i https://pypi.douban.com/simple
不废话,上代码。
#!/usr/bin/env python # -*- coding: utf-8 -*- # @Time : 2021/12/11 21:43 # @Author : 剑客阿良_ALiang # @Site : # @File : image_tool.py import os import uuid from ffmpy import FFmpeg # 调整图片大小 def change_size(image_path: str, output_dir: str, width: int, height: int): ext = os.path.basename(image_path).strip().split('.')[-1] if ext not in ['png', 'jpg']: raise Exception('format error') _result_path = os.path.join( output_dir, '{}.{}'.format( uuid.uuid1().hex, ext)) ff = FFmpeg(inputs={'{}'.format(image_path): None}, outputs={ _result_path: '-vf scale={}:{}'.format(width, height)}) print(ff.cmd) ff.run() return _result_path
代码说明:
1、change_size方法入参分别为:图片地址、输出目录地址、需要修改的宽、需要修改的高。
2、验证的图片格式只有png、jpg,如需添加自行添加。
3、为了避免输出文件文件名重复,使用uuid作为文件名。
准备的图片如下:
执行代码:
if __name__ == '__main__': print(change_size('data/1234.jpg', 'data/', 1280, 720))
执行结果:
E:\ProgramData\Anaconda3\envs\pytorch\python.exe C:/Users/yi/PycharmProjects/test/image_tool.py ffmpeg -i data/123.jpg -vf scale=1280:720 data/709ad7cc5a8a11ec82c82c4d54eea02b.jpg ffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9.3-win32 (GCC) 20200320 configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-iconv --enable-zlib --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-ffnvcodec --enable-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libtwolame --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, image2, from 'data/123.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: 170762 kb/s Stream #0:0: Video: mjpeg (Progressive), yuvj444p(pc, bt470bg/unknown/unknown), 1920x1080, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native)) Press [q] to stop, [?] for help [swscaler @ 000001d3c41b6c00] deprecated pixel format used, make sure you did set range correctly Output #0, image2, to 'data/709ad7cc5a8a11ec82c82c4d54eea02b.jpg': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: mjpeg, yuvj444p(pc), 1280x720, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc58.91.100 mjpeg Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A frame= 1 fps=0.0 q=7.8 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.28x video:106kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown data/709ad7cc5a8a11ec82c82c4d54eea02b.jpg
效果图片:
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