Automated Video Editing with MoviePy in Python

[00:04] [Music]

[00:09] what is going on guys welcome back in

[00:11] today's video i'm going to show you how

[00:12] you can automate video editing in python

[00:15] using movie pie so let's get right into

[00:17] it all right so what we're going to do

[00:18] is we're going to edit videos we're

[00:20] going to cut videos in python we're

[00:21] going to add some effects and for this

[00:23] we're going to use the library movie pi

[00:25] which is an external library which means

[00:26] that we need to install it using the

[00:28] command line so we open up cmd on

[00:30] windows or the terminal on linux and mac

[00:32] and we type pip install

[00:35] movie pi like that

[00:38] once you've done that you will be able

[00:39] to import it so we're going to say from

[00:41] movie pi and we're going to use a sub

[00:43] module editor so we're going to say from

[00:45] movie pi dot editor because we can do

[00:47] different things with

[00:49] uh with movie pie so we're going to pick

[00:51] the editor to edit videos and from the

[00:53] editor we're going to import a bunch of

[00:55] classes and functions and so on so

[00:59] if you just want to play around you can

[01:01] use a wildcard import but never use it

[01:03] in code if you have to import many many

[01:06] things in code you might want to use an

[01:07] alias something like import

[01:10] moviepie.editor s i don't know me or

[01:12] something i think there might even be a

[01:14] convention for that uh but don't just

[01:17] import everything you can do that if you

[01:19] just want to play around and if you want

[01:21] to to experiment uh for today's video

[01:23] we're just gonna import everything

[01:24] manually and the first thing you want to

[01:27] import here is the video file clip and

[01:29] before we continue with the code let me

[01:31] show you what the basic idea is of what

[01:33] we're going to do today so i have here a

[01:35] directory with

[01:37] an intro mp4 which is a neural nine

[01:39] intro and we have two videos which are

[01:42] copyright free um so i got them from

[01:45] pixabay

[01:46] to to be able to show them in that video

[01:48] here

[01:49] and when we open one of these videos

[01:51] here we're going to see they're quite

[01:53] simple so just some smoke

[01:56] um 59 seconds you can see some smoke

[01:59] animation here

[02:00] and the second one is also something

[02:03] similar

[02:04] as you can see here

[02:05] um and then i have the neural nine intro

[02:07] which i'm mainly going to use for the

[02:09] music so we're not going to use the the

[02:11] intro itself really as a video and the

[02:14] basic idea is just to show you here how

[02:15] you can add it how you can combine how

[02:17] you can cut videos with movie pie and

[02:19] python uh it is quite interesting

[02:21] especially if you want to i don't know

[02:23] do some compilation style video or you

[02:25] want to do some random compilation or

[02:27] you want to just automate your video

[02:29] cutting process if it's always the same

[02:31] you just need to enter the seconds or

[02:32] something like that uh there are many

[02:34] use cases for that so i'm going to give

[02:36] you the very simple example of just

[02:37] picking these videos that i showed you

[02:39] taking parts out of them combining them

[02:41] then adding some transitions then adding

[02:44] some music and so on uh just to see how

[02:46] this works

[02:47] so the first thing we want to do is we

[02:48] want to define clips we want to take for

[02:50] example

[02:52] the first video of the smoke animation

[02:54] if we want to take

[02:55] the part from second 10 to second 20.

[02:58] how do we do that we can say something

[03:00] like clip 1

[03:01] equals and then i say video file clip

[03:04] and here i enter the file name now so i

[03:06] enter 1.mp4

[03:08] which is the first video and then i can

[03:10] apply

[03:11] certain functions at the end of that

[03:13] video file clip so i can say ok dot sub

[03:15] clip and this is going to return again a

[03:18] clip now if i'm not mistaken video file

[03:20] clip

[03:22] um

[03:24] do we see that here

[03:26] okay we don't see that but video file

[03:28] clip returns a clip and when i then

[03:29] apply sub clip it returns a clip and i

[03:31] think that when i apply something else

[03:34] it also returns a clip so it's a little

[03:36] bit like a

[03:37] builder as far as i know but the

[03:39] important thing is we we do something

[03:41] like mp4 and then

[03:43] dot sub clip and here we specify

[03:46] second 10 second 20. this means we take

[03:48] the video uh at the location1.mp4 this

[03:52] is the file name then we sub clip

[03:54] meaning that we take uh the part of the

[03:56] video from second 10 to second 20 and

[03:59] then we can add some more stuff in the

[04:01] end if we want to we're just going to

[04:02] leave it like that for now then we can

[04:04] say clip 2 equals video file clip 2.mp4

[04:08] and we can do something something

[04:10] similar here so for example

[04:13] same time range and then we can say okay

[04:15] clip three is going to be just

[04:18] the

[04:19] one mp4 again

[04:24] dot sub clip 20 30 for example just to

[04:28] mix it up a little bit

[04:30] um

[04:30] [Music]

[04:32] yeah so this is without effect this is

[04:33] without transitions this is just a basic

[04:36] uh the basic clips here and now we can

[04:38] go ahead and combine these into one full

[04:40] video that we then save that we then

[04:43] export to the hard drive and how we can

[04:46] do that is we need to import another

[04:47] function which is called concatenate

[04:50] video clips

[04:51] and as the name already says it

[04:52] concatenates video clips so we're going

[04:54] to say combined equals concatenate video

[04:57] clips and here we basically just pass a

[04:59] list of clips so clip 1

[05:01] clip 2

[05:03] clip 3 like that

[05:05] and all we need to do now to produce to

[05:08] produce the final video is combined dot

[05:11] write video file and then combine dot

[05:13] mp4 for example

[05:18] so we run this and we're hopefully going

[05:21] to see the progress here you can see

[05:23] it's working

[05:25] uh it may take a little bit longer if

[05:26] you don't have a strong computer and

[05:28] then it's done we can go ahead and open

[05:31] it up in the explorer

[05:33] and then just click on it and you can

[05:35] see here that we have the first 10

[05:37] seconds are the animation from video one

[05:39] from the second 10 to second 20 and then

[05:43] after 10 seconds we're going to switch

[05:44] you're going to see here there you go it

[05:46] switches and then

[05:48] at around second 20 there you go it

[05:50] switches back again so we just combined

[05:52] three clips we took a video we took two

[05:55] videos we got some clips out of that we

[05:57] combined them in a certain order and

[05:59] that's basically it so this is how you

[06:01] basically just cut videos now you can

[06:03] also add some animation you can add

[06:05] transitions you can add effects uh so

[06:08] let me show you a very simple one you

[06:09] can go just ahead here and say clip four

[06:12] and we're gonna take uh let's say again

[06:15] 10 20 so we basically take the same clip

[06:18] but we're now gonna add some effects and

[06:20] how do we add effects now i'm not sure

[06:22] if we need to import that no we don't

[06:24] need to import that but we need to

[06:25] import uh something else so we can call

[06:27] the dot fx function to add some effect

[06:30] to add some filter basically and here

[06:33] now we need to use vfx so we need to

[06:35] import vfx and we're going to use vfx

[06:38] for

[06:39] um

[06:41] for all sorts of filters for all sorts

[06:43] of video transitions everything that's

[06:46] related to video effects is in vfx

[06:48] everything that's related to audio

[06:50] effects is in afx so later on we're also

[06:52] going to import afx now let me just see

[06:54] if you can see all the imports yes you

[06:56] can

[06:57] um

[06:58] and now what we can do here is we can

[06:59] just say okay

[07:01] let's say vfx dot color

[07:04] x

[07:05] and now i can just say 1.5

[07:09] and this is going to change the color

[07:11] color x value

[07:12] i can also change the contrast now let

[07:14] me just start a new line here how do we

[07:16] do that in python again like that right

[07:19] uh so

[07:21] dot fx and then vfx dot

[07:25] loom underscore contrast and we're gonna

[07:29] say this is 0

[07:31] 50

[07:32] 128 or something

[07:35] i hope these are acceptable values now

[07:36] let me indent that a little bit here

[07:40] and

[07:42] now we can just add this clip here in

[07:44] the end and this is going to take some

[07:45] time probably because it has to do the

[07:48] calculations so you're going to see that

[07:50] when it works it's going to start quite

[07:52] quickly and then in the end it's going

[07:53] to take some more time i think there you

[07:55] go

[07:56] now now it uh it is a little bit slower

[07:58] because it has to apply onto each frame

[08:00] all these effects now those are just two

[08:02] effects but if you have a lot of effects

[08:04] on each frame this needs to be

[08:06] calculated what it looks like and so on

[08:08] uh and then it produces the final video

[08:10] and now we're going to see that we have

[08:12] an additional clip an additional 10

[08:14] second clip

[08:15] and if we open this up again

[08:19] in the explorer

[08:21] and we go to the end you're going to see

[08:24] that we now have this thing here which

[08:26] is essentially

[08:27] uh the first

[08:29] the first clip with these filters again

[08:31] i didn't choose quite i didn't choose

[08:34] any

[08:35] interesting or meaningful filters i just

[08:37] showed you something again if you want

[08:38] to see all the functions like usual you

[08:41] just go to documentation but this is the

[08:43] general idea you call the fx function on

[08:46] a clip and then you pass vfx for video

[08:49] effects and then uh you you pick some

[08:51] filter you pick some setting that you

[08:53] want to change

[08:54] now

[08:55] another thing that we can do here is

[08:57] transitions as i already said so what i

[08:59] usually do in my videos you have

[09:00] probably noticed is i have one clip at

[09:02] least when i split the video up into

[09:04] multiple clips i have one clip and then

[09:06] in the end i have a one second

[09:08] fade out or half a second fade out and

[09:10] then fade in again

[09:12] to switch between the individual clips

[09:14] so we can do something similar here as

[09:16] well we can just say fx and then vfx

[09:19] dot fade in

[09:21] and then specify the second so one

[09:24] second fade in

[09:25] and then also

[09:27] fx vfx and now i think i'm starting to

[09:30] block the code right

[09:31] there you go so let me just move this

[09:33] down here

[09:36] um i can say vfx dot fade out

[09:40] and

[09:42] vfx fade out is gonna have also one

[09:44] second and now i can just take this here

[09:47] i can copy this and i can

[09:51] paste this

[09:52] and there you go

[09:54] and that will then generate a simple

[09:57] fade in fade out effect now before we

[09:59] just do that i also want to add an audio

[10:01] clip or actually let's first see what

[10:03] what this looks like since we don't have

[10:05] the effects now anymore this is not

[10:07] going to take too long uh but then we're

[10:09] also going to get uh we're we're going

[10:11] to add the audio from my intro just to

[10:13] have some audio again the result of this

[10:15] is not going to be a fancy video it's

[10:16] just showing you how to use everything

[10:18] and then you can make your own fancy

[10:20] video if you want to

[10:22] but now we should be able to see a fade

[10:24] in effect there you go we saw the fade

[10:27] in effect now

[10:28] at second

[10:30] 10 we see it fade out fade in and so on

[10:33] and so forth so this is quite useful um

[10:36] if you want to use python for video

[10:37] editing i don't i use davinci resolve

[10:39] but still you can use python for video

[10:41] editing if you want to

[10:43] now let's go ahead and

[10:45] get the audio clip and for that we're

[10:46] going to also import here the audio file

[10:49] clip

[10:50] and we're also going to import afx for

[10:52] the audio effects

[10:54] um and how do we do that essentially we

[10:56] just say okay audio equals audio file

[10:59] clip and we don't have to load an mp3 or

[11:02] an audio file we can also get a video

[11:04] file and get the audio from that video

[11:06] file

[11:07] and now we can add some some effects

[11:09] here as well so we can say fx and then

[11:11] for example af afx dot audio

[11:16] underscore

[11:18] fade in

[11:19] to fade in the audio obviously and also

[11:21] here we can specify a second

[11:24] and then we're going to say fx

[11:26] af afx and we can change the volume now

[11:30] let's do it first without the volume

[11:31] change i'm actually not sure if you're

[11:34] going to hear something because i think

[11:35] i have disabled the desktop sound

[11:37] um

[11:39] but

[11:40] this is how you create your audio clip

[11:41] and now to the final video clip you just

[11:43] have to say combined dot

[11:46] audio equals and then this is another

[11:48] thing that we need to import here

[11:50] composite audio clip

[11:53] um

[11:55] and we just say here composite audio

[11:57] clip

[11:58] audio like that

[12:01] so we can run that and then it's going

[12:03] to get the audio from the intro again i

[12:05] don't think that you're going to hear it

[12:06] maybe i can change something about the

[12:08] settings here

[12:10] so i now enable the desktop audio maybe

[12:12] you're going to hear something if not

[12:14] you can just run this on your own

[12:15] computer and you're going to see

[12:17] that the audio is there

[12:19] and

[12:20] again

[12:24] [Music]

[12:27] you want to do it on your own and um now

[12:30] we can add a final filter here we can

[12:31] just say fx

[12:34] af x dot

[12:36] uh what was the name volume x and this

[12:38] basically means that we can

[12:40] uh increase or decrease the volume so if

[12:42] i say 0.1 we're not going to hear

[12:44] anything now i don't know if you heard

[12:46] anything

[12:46] um

[12:47] right now but if you have heard anything

[12:50] right now now you would hear it way uh

[12:53] way more silent

[12:54] so the the volume is going to be

[12:56] decreased and we can see the effect

[12:58] hopefully you can also hear it in the

[13:00] video again otherwise just try it on

[13:01] your own

[13:04] and there you go

[13:07] so there is still audio but it's very

[13:09] very

[13:10] silent

[13:11] i'm not sure if silent is the correct

[13:12] word so this is how you can cut videos

[13:15] how you can edit videos in python you

[13:17] just have video clips you have audio

[13:19] clips you can

[13:20] cut them you can add effects you can add

[13:22] transitions you can change the audio you

[13:24] can fade in fade out and a ton of more

[13:26] things that you can read about in a

[13:28] documentation this was a very basic

[13:30] introduction i hope you enjoyed it and

[13:32] that's it

[13:33] so that's it for today's video i hope

[13:34] you enjoyed it and i hope you learned

[13:36] something if so let me know by hitting

[13:37] the like button and leaving a comment in

[13:39] the comment section down below and of

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[13:46] other than that thank you much for

[13:47] watching see you next video and bye

[13:50] [Music]

[14:06] you