python ffmpeg任意提取视频帧的方法
作者:anoyi
这篇文章主要介绍了python ffmpeg任意提取视频帧的方法,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
环境准备
1、安装 FFmpeg
2、安装 ffmpeg-python
pip3 install ffmpeg-python
3、【可选】安装 opencv-python
pip3 install opencv-python
4、【可选】安装 numpy
pip3 install numpy
视频帧提取
准备视频素材
抖音视频素材下载:https://anoyi.com/dy/top
基于视频帧数提取任意一帧
import ffmpeg import numpy import cv2 import sys import random def read_frame_as_jpeg(in_file, frame_num): """ 指定帧数读取任意帧 """ out, err = ( ffmpeg.input(in_file) .filter('select', 'gte(n,{})'.format(frame_num)) .output('pipe:', vframes=1, format='image2', vcodec='mjpeg') .run(capture_stdout=True) ) return out def get_video_info(in_file): """ 获取视频基本信息 """ try: probe = ffmpeg.probe(in_file) video_stream = next((stream for stream in probe['streams'] if stream['codec_type'] == 'video'), None) if video_stream is None: print('No video stream found', file=sys.stderr) sys.exit(1) return video_stream except ffmpeg.Error as err: print(str(err.stderr, encoding='utf8')) sys.exit(1) if __name__ == '__main__': file_path = '/Users/admin/Downloads/拜无忧.mp4' video_info = get_video_info(file_path) total_frames = int(video_info['nb_frames']) print('总帧数:' + str(total_frames)) random_frame = random.randint(1, total_frames) print('随机帧:' + str(random_frame)) out = read_frame_as_jpeg(file_path, random_frame) image_array = numpy.asarray(bytearray(out), dtype="uint8") image = cv2.imdecode(image_array, cv2.IMREAD_COLOR) cv2.imshow('frame', image) cv2.waitKey()
基于时间提取任意一帧
import ffmpeg import numpy import cv2 import sys import random def read_frame_by_time(in_file, time): """ 指定时间节点读取任意帧 """ out, err = ( ffmpeg.input(in_file, ss=time) .output('pipe:', vframes=1, format='image2', vcodec='mjpeg') .run(capture_stdout=True) ) return out def get_video_info(in_file): """ 获取视频基本信息 """ try: probe = ffmpeg.probe(in_file) video_stream = next((stream for stream in probe['streams'] if stream['codec_type'] == 'video'), None) if video_stream is None: print('No video stream found', file=sys.stderr) sys.exit(1) return video_stream except ffmpeg.Error as err: print(str(err.stderr, encoding='utf8')) sys.exit(1) if __name__ == '__main__': file_path = '/Users/admin/Downloads/拜无忧.mp4' video_info = get_video_info(file_path) total_duration = video_info['duration'] print('总时间:' + total_duration + 's') random_time = random.randint(1, int(float(total_duration)) - 1) + random.random() print('随机时间:' + str(random_time) + 's') out = read_frame_by_time(file_path, random_time) image_array = numpy.asarray(bytearray(out), dtype="uint8") image = cv2.imdecode(image_array, cv2.IMREAD_COLOR) cv2.imshow('frame', image) cv2.waitKey()
相关资料
https://github.com/kkroening/ffmpeg-python/tree/master/examples
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。