前言
本文提供将多个视频拼接为一个视频的Python工具代码，其中有一些限制条件，下面的代码说明会提到，
环境依赖
ffmpeg环境安装，可以参考：windows ffmpeg安装部署
本文主要使用到的不是ffmpeg，而是ffprobe也在上面这篇文章中的zip包中，
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ffmpy安装：
pip install ffmpy -i https://pypi.douban.com/simple代码
#!/user/bin/env python
# coding=utf-8
"""
@project : csdn
@author : 剑客阿良_ALiang
@file : concat_video.py
@ide : PyCharm
@time : 2021-12-23 15:23:16
"""
from ffmpy import FFmpeg
import os
import uuid
import subprocess
# 视频拼接
def concat(video_list: list, output_dir: str):
if len(video_list) == 0:
raise Exception('video_list can not empty')
_ext = check_format(video_list)
_fps = check_fps(video_list)
_result_path = os.path.join(
output_dir, '{}{}'.format(
uuid.uuid1().hex, _ext))
_tmp_config = make_tmp_concat_config(video_list, output_dir)
ff = FFmpeg(inputs={'{}'.format(_tmp_config): '-f concat -safe 0 -y'}, outputs={
_result_path: '-c copy'})
print(ff.cmd)
ff.run()
os.remove(_tmp_config)
return _result_path
# 构造拼接所需临时档案
def make_tmp_concat_config(video_list: list, output_dir: str):
_tmp_concat_config_path = os.path.join(output_dir, '{}.txt'.format(uuid.uuid1().hex))
with open(_tmp_concat_config_path, mode='w', encoding='utf-8') as f:
f.writelines(list(map(lambda x: 'file {}\n'.format(x), video_list)))
return _tmp_concat_config_path
# 校验每个视频的格式
def check_format(video_list: list):
_video_format = ''
for x in video_list:
_ext = os.path.splitext(x)[-1]
if _video_format == '' and _ext != '':
_video_format = _ext
continue
if _video_format != '' and _ext == _video_format:
continue
if _video_format != '' and _ext != _video_format:
raise Exception('Inconsistent video format')
return _video_format
# 校验每个视频的fps
def check_fps(video_list: list):
_video_fps = 0
for x in video_list:
_fps = get_video_fps(x)
if _video_fps == 0 and _fps:
_video_fps = _fps
continue
if _video_fps != 0 and _fps == _video_fps:
continue
if _video_fps != '' and _fps != _video_fps:
raise Exception('Inconsistent video fps')
if _video_fps == 0:
raise Exception('video fps error')
return _video_fps
# 获取视频fps
def get_video_fps(video_path: str):
ext = os.path.splitext(video_path)[-1]
if ext != '.mp4' and ext != '.avi' and ext != '.flv':
raise Exception('format not support')
ffprobe_cmd = 'ffprobe -v error -select_streams v -of default=noprint_wrappers=1:nokey=1 -show_entries stream=r_frame_rate {}'
p = subprocess.Popen(
ffprobe_cmd.format(video_path),
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
shell=True)
out, err = p.communicate()
print("subprocess 执行结果：out:{} err:{}".format(out, err))
fps_info = str(out, 'utf-8').strip()
if fps_info:
if fps_info.find("/") > 0:
video_fps_str = fps_info.split('/', 1)
fps_result = int(int(video_fps_str[0]) / int(video_fps_str[1]))
else:
fps_result = int(fps_info)
else:
raise Exception('get fps error')
return fps_result
if __name__ == '__main__':
print(concat(['D:/tmp/100.mp4', 'D:/tmp/101.mp4'], 'C:/Users/huyi/Desktop'))代码说明
1、主要拼接方法为concat，入参分别为：视频串列、输出目录，
2、该视频拼接命令对视频本身有所限制，需要保证都是相同格式的视频，其次是每个视频的fps得一致，不然最终合成的视频会无法打开或者出现花屏现象，
3、临时的拼接档案会在使用后洗掉，
4、最终输出的文件名为了保证唯一使用uuid，
验证一下
下面是我准备的两个视频：
执行结果
PyDev console: starting.
Python 3.6.13 |Anaconda, Inc.| (default, Mar 16 2021, 11:37:27) [MSC v.1916 64 bit (AMD64)] on win32
runfile('D:/spyder/csdn/tool/concat_video.py', wdir='D:/spyder/csdn/tool')
subprocess 执行结果：out:b'25/1\r\n' err:b''
subprocess 执行结果：out:b'25/1\r\n' err:b''
ffmpeg -f concat -safe 0 -y -i C:/Users/huyi/Desktop\6d02df4b63d111eca6eee454e8bf1461.txt -c copy C:/Users/huyi/Desktop\6d02df4a63d111ec9dbbe454e8bf1461.mp4
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
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001de4a7aebc0] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from 'C:/Users/huyi/Desktop\6d02df4b63d111eca6eee454e8bf1461.txt':
Duration: N/A, start: -0.064000, bitrate: 1098 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 69 kb/s
Metadata:
handler_name : SoundHandler
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1080x1920, 1028 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
Metadata:
handler_name : VideoHandler
Output #0, mp4, to 'C:/Users/huyi/Desktop\6d02df4a63d111ec9dbbe454e8bf1461.mp4':
Metadata:
encoder : Lavf58.45.100
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1080x1920, q=2-31, 1028 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 69 kb/s
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Stream #0:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001de4a7aebc0] Auto-inserting h264_mp4toannexb bitstream filter
[mp4 @ 000001de4acdabc0] Non-monotonous DTS in output stream 0