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Python modify picture resolution (with code) | Python tool

2022-02-02 09:46:48 Swordsman a Liang_ ALiang



Environment depends on




This article provides a method to adjust the image resolution python Code , Pragmatism as always .

Environment depends on

ffmpeg Environmental installation , You can refer to another article of mine :windows ffmpeg Installation and deployment _ A Liang's blog -CSDN Blog

ffmpy install :

pip install ffmpy -i


Don't bullshit , Code up .

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2021/12/11 21:43
# @Author  :  Swordsman a Liang _ALiang
# @Site    :
# @File    :

import os
import uuid
from ffmpy import FFmpeg

#  Resize the picture 
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)})
    return _result_path

Code instructions :

1、change_size The method input parameters are : Picture address 、 Output directory address 、 Width to be modified 、 Height to be modified .

2、 The verified image format is only png、jpg, If you need to add, add it yourself .

3、 To avoid duplicate output file names , Use uuid As the file name .

Check it out :

The prepared pictures are as follows :

Execute code :

if __name__ == '__main__':
    print(change_size('data/1234.jpg', 'data/', 1280, 720))

Execution results :

E:\ProgramData\Anaconda3\envs\pytorch\python.exe C:/Users/yi/PycharmProjects/test/
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':
    encoder         : Lavf58.45.100
    Stream #0:0: Video: mjpeg, yuvj444p(pc), 1280x720, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
      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

Effect picture :


OK, No problem .


There is nothing to sum up .

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