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)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
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)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
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)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
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