python - Create a video of layered videos -


i'm python , opencv beginner! create video made of 3 others videos. each video moving car on black background

i created video empty moment: 

video_summary=cv2.videowriter(video_output_path ,fourcc,video_fps ,(480,270), true)

now, add videos called 0, 2 , 4 "video_a_ajouter" in video_summary.

video_a_ajouter=[0,2,4] video_working=[]

so, did this:

for in video_a_ajouter:    video_working.append(cv2.videocapture(output_directory_path+'output_tp_'+str(video_a_ajouter[0])+'.avi'))         video_a_ajouter.remove(video_a_ajouter[0])

i know how put 3 videos in video_summary, considering 0 overlaps 2 , 2 overlaps 4

thank in advance !! :)

i'm not sure mean "made of 3 other videos", here 2 ideas:

1) 3 videos seen 1 after in succession:

if case, can check if current video finished. if isn't, add frame, else append frame next video:

ret1,img1=cap1.read()//read 1st video ret2,img2=cap2.read()//2nd ret3,img3=cap3.read()//3rd  if(cap1.isopened()):    video_summary.write(img1) elif(cap2.isopened()):    video_summary.write(img2) elif(cap3.isopened()):    video_summary.write(img3)

2) need overlay 3 videos 1 on another:

in case, should addweighted function


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