python 拼接Python实现多个合成的功能你知道吗

导读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....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。

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 FFmpegimport osimport uuidimport 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 # 构造拼接所需临时文件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fpsdef 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fpsdef 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：视频列表、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、临时的拼接文件会在使用后删除。

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 win32runfile(D:/spyder/csdn/tool/concat_video.py, wdir=D:/spyder/csdn/tool)subprocess 执行结果：out:b25/1\r\n err:bsubprocess 执行结果：out:b25/1\r\n err:bffmpeg -f concat -safe 0 -y -i C:/Users/huyi/Desktop\6d02df4b63d111eca6eee454e8bf1461.txt -c copy C:/Users/huyi/Desktop\6d02df4a63d111ec9dbbe454e8bf1461.mp4ffmpeg 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 filterInput #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 : VideoHandlerOutput #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 : SoundHandlerStream 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 0:1; previous: 6176768, current: 6176608; changing to 6176769. This may result in incorrect timestamps in the output file.frame=22199 fps=0.0 q=-1.0 Lsize= 119649kB time=00:14:48.05 bitrate=1103.7kbits/s speed=2.41e 03x video:111571kB audio:7524kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.465183%C:/Users/huyi/Desktop\6d02df4a63d111ec9dbbe454e8bf1461.mp4

结果验证