concatenate_videoclips([clip1,clip2]) results in a clip where the second clip is skewed and has severe lines

[evanthemann]

When running the following code:

`>>> from moviepy.editor import *

clip1 = VideoFileClip('clip1.MOV')
clip2 = VideoFileClip('clip2.mp4')
render = concatenate_videoclips([clip1,clip2])
render.write_videofile('render.mp4', codec='libx264')`

The resulting video file is messed up. It has lines all through the screen and there are about 4 copies of the clip tiled across the screen horizontally and vertically.

[Zulko]

that is most certainly because your clips are not the same size, therefore you must add method='compose' to concatenate_videoclip

[ghost]

Should we output a warning if the sizes are not equal and the method is not compose?

[ghost]

@evanthemann .. did @Zulko 's advice solve the problem?

[tburrows13]

In fact, why not make "compose" the default? I can't see why most people would want to use "chain"... @Zulko, is there any reason the default is "chain"?

[evanthemann]

Yes it did! Realized I was trying to combine a 1280x720 clip with a 1920x1080 clip. Thanks!

[tismagic]

Do you have a method to resize the video's size?
If you do, can you show me?

here is a method I wrote by myself. I don't think this is very good
def resizeAllClip(clips):
max = 0
for clip in clips:
if clip.size[1] > max:
max = clip.size[1]
clip_t = []
for clip in clips:
wid = int((max / clip.size[1]) * clip.size[0])
print(wid)
clip = clip.resize(width=wid, height=max)
clip_t.append(clip)
return clip_t

[EnvoySir]

@Zulko Thanks for your solution. is there any other useful params to remind us?