本文实例为大家分享了多个视频文件合成画中画效果的python代码，供大家参考，具体内容如下
Step 1 从视频中分离出音频（MP4->mp3）
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def separateMp4ToMp3(tmp): mp4 = tmp.replace('.tmp', '.mp4') print('---> Separate the video clip {0}'.format(mp4)) mp3 = tmp.replace('.tmp', '.mp3') if os.path.exists(mp3): print '\n\t{0} is detected. Skip. \n\tPlease delete .mp3 file if you need re-separate.'.format(mp3) return cmd = 'ffmpeg -i {0} -f mp3 -vn -loglevel fatal {1}'.format(mp4, mp3) print '\t{0}'.format(cmd) x = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) for log in x.stdout.readlines(): print '[ffmpeg info] {0}'.format(log) for log in x.stderr.readlines(): print '[ffmpeg error] {0}'.format(log) print '\tSuccess! {0} -> {1}\n'.format(mp4, mp3) |
Step 2 根据时间轴多个音频合成一份音频（MP3->mp3）
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def composeMp3ToMp3(arr = []): if len(arr) <=0 : print('--->Operate audio array is empty!') return thisDir = os.path.dirname(arr[0]) if (os.path.exists(thisDir + "/composeAudio.mp3")): print('--->{0}/composeAudio.mp3 is exist, if you need re-gennerate,Please delete it!'.format(thisDir)) return print('---> Compose the audio :') var = '' for tem in arr: if os.path.exists(tem) == False: print '\n\t{0} is not exist! \n\tPlease make sure audio file be exist if you need compose.'.format(tem) return var = var + " -i " + tem if var == '': print '\n\t{0} is empty. \n\tPlease check .mp3 file if you need compose.'.format(var) return cmd = 'ffmpeg {0} -filter_complex amix=inputs=2:duration=first:dropout_transition=2 -f mp3 -loglevel fatal {1}/composeAudio.mp3'.format(var, thisDir) print '\t{0}'.format(cmd) x = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) for log in x.stdout.readlines(): print '[ffmpeg info] {0}'.format(log) for log in x.stderr.readlines(): print '[ffmpeg error] {0}'.format(log) print '\tSuccess! {0} -> {1}\n'.format(var, thisDir + "/composeAudio.mp3") |
Step 3 多个视频合成画中画效果<无声>（MP4->mp4）
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def composeMp4ToMp4(arr = []): if len(arr) <= 0: print('--->Operate video array is empty!') return thisDir = os.path.dirname(arr[0]) if (os.path.exists(thisDir + "/composeVideo.mp4")): print('--->{0}/composeVideo.mp4 is exist, if you need re-gennerate,Please delete it!'.format(thisDir)) return print('---> Compose the video :') var = '' temparr = [] for tem in arr: if os.path.exists(tem) == False: print '\n\t{0} is not exist! \n\tPlease make sure video file be exist if you need compose.'.format(tem) return #split image png = tem.replace('.mp4', '.png') tempcmd="ffmpeg -i {0} -ss 00:00:2.435 -loglevel fatal -vframes 1 {1}".format(tem, png) print '\t{0}'.format(tempcmd) x = subprocess.Popen(tempcmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) x.wait() for log in x.stdout.readlines(): print'[ffmpeg info] {0}'.format(log) for log in x.stderr.readlines(): print'[ffmpeg error] {0}'.format(log) img = Image.open(png) imgSize = img.size #ipad if (imgSize[0] > imgSize[1]) : temparr.append(tem) #mobile else: var = var + " -i " + tem img.close() if (len(temparr) > 0): for tem in temparr: var = var + " -i " + tem if var == '': print '\n\t{0} is empty. \n\tPlease check video file if you need compose.'.format(var) return cmd = 'ffmpeg ' + var + ' -filter_complex "[1:v]scale=w=176:h=144:force_original_aspect_ratio=decrease[ckout];[0:v]' \ '[ckout]overlay=x=W-w-10:y=10[out]" -map "[out]" -movflags faststart -loglevel fatal ' + thisDir + '/composeVideo.mp4'.format(var, thisDir) print '\t{0}'.format(cmd) x = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) for log in x.stdout.readlines(): print '[ffmpeg info] {0}'.format(log) for log in x.stderr.readlines(): print '[ffmpeg error] {0}'.format(log) print '\tSuccess!\n {0} -> {1}\n'.format(var, thisDir + "/composeVideo.mp4") |
Step 4 音频与视频合成
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def communicateAudioVideo(folder): if (os.path.exists(folder + "/communicateVideo.mp4")): print('--->{0}/communicateVideo.mp4 is exist, if you need re-gennerate,Please delete it!'.format(folder)) return if ((os.path.exists(folder + "/composeVideo.mp4") == False) or (os.path.exists(folder + "/composeAudio.mp3") == False)): print('--->{0}/composeVideo.mp4 or composeAudio.mp3 must be exist!'.format(folder)) return print('---> Communicate the video :') cmd = 'ffmpeg -i ' + folder + '/composeVideo.mp4 -i ' + folder + '/composeAudio.mp3 -f mp4 ' \ ' -loglevel fatal ' + folder +'/communicateVideo.mp4' print '\t{0}'.format(cmd) x = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) for log in x.stdout.readlines(): print '[ffmpeg info] {0}'.format(log) for log in x.stderr.readlines(): print '[ffmpeg error] {0}'.format(log) print '\tSuccess!\n {0} and {1} -> {2}\n'.format(folder + '/composeVideo.mp4', folder + '/composeAudio.mp3', folder +'/communicateVideo.mp4') |
源码下载
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服务器之家。
原文链接：https://blog.csdn.net/wolfjson/article/details/76509709
