@mux/ai

Need to combine multiple

clips into one seamless video.

Whether you're merging

interviews, creating a

highlight reel or stitching a

simple shoot day, FFmpeg gives

you two ways to achieve this.

One, if all of the formats

and codecs are matching,

and another way, if they're

not, let's get into both.

Gonna have two different

ways to do this.

First one is if your video

files have the same codec

resolution, frame rate,

container, all that good

stuff, we're gonna be

working out of the multi

underscore, same folder here.

See this one?

Surfing righty.

Great.

So we're gonna concatenate

all these together.

The way to do that in

FFmpeg is you're gonna

create a text file and

that's gonna be our input

in our terminal for FFmpeg.

So there's a good shortcut

in Mac where you can right

click and hit option and

you can copy the four

items as path names.

And there are absolute paths.

Um, and then I'm just

gonna paste those here.

Um, you can automate this very

easily if you wanted to, the

creation of this text file.

But for kind of learning

purposes here, we're just

gonna do it manually.

So each one is gonna be file,

uh, single quote, the absolute

URL, or you could do relative.

But for this one, we're

gonna do, um, absolute.

I'm just gonna

highlight each one.

Put in single

quotes, put a file.

All right, then I'm gonna

hit command S for save.

Um, and so you see

here, it's all good.

So that's, this is

kind of what we want.

We're gonna go to

our terminal here.

Again, if you don't have

FFmpeg installed, um, you can

easily do, uh, brew, install

FFmpeg or builder from source.

Building it from source is a

little bit more convoluted.

Our command is gonna be

FFmpeg dash F for format.

And Concat is for

Concatenation Safe is a

way to pull in a text file

for security reasons, and

then Dash I is our input.

So I'm actually gonna copy

the path name here just for

an easier way of doing it.

I could also drag

it if I wanted to.

And then this is just

a stream copy, right?

So we're just stitching

it everything together.

So we're grabbing all streams.

I mean, we're just copying

them into our output files.

So I'm gonna put.

S underscore output .mp4

because that's what the

base format is here, right?

I'm gonna hit enter, let's

see, see what it outputted.

And it looks like

it all worked out.

So it is in the order

that you put it in,

um, in that text file.

But everything looks great.

And, uh, that's how you

stitch without re encoding.

And if they're all

the same format.

For our second section

of this, we're gonna

combine different kinds of

video files or different

flavors of video files.

Ones that have different

codecs or different frame

rates, different formats,

anything like that.

We have these two right here.

One's in 25 frames per

second, the other is in

30 frames per second.

So we have this one

and the surfing one.

So no text file for this.

We're just going to be doing

this in the terminal and we're

gonna have two inputs here.

And I'm just gonna

drag these over.

It's easier this way.

We're gonna do

our second input.

Great. So we have our two inputs

here now where you're

going to write a filter

map or a complex filter.

Gonna be two quotes and

it's gonna be a bunch

of square brackets and a

bunch of things that might

look a little foreign,

but just bear with me.

That is going to be the video

stream of the first input,

and we're gonna do the audio

stream of the first input.

Now we are going to do the

video stream of the second

input and then the audio

stream of the second input.

The one is for index one.

Then we are gonna tell

the filter to Concat.

The N is for the number

streams, V equals one, so two

streams into one video stream.

Then one audio stream,

pipe that into out.

It's almost like a variable

out V plus out A, which is

output video, output audio.

Close quotes there.

We're gonna map each one into

this new video, file out B,

and then map quotes, square

brackets out A, and then we're

gonna do D underscore output,

so for different, and then

we are going to run this.

Let's just make sure

looks good to me.

All right, let's run it.

And this one is encoding

as well as you see.

This is why it's taken a

little bit, but here we go.

Um, we do have to re-encode

just because they're different

formats, different codecs.

We wouldn't be able

to stream copy.

So let's check this one out.

That looks good.

That's the first file that

we, it's our first input.

And here's our second input.

So that's works for

kind of mismatched

clips, and that's it.

Now you can join video clips

in seconds with FFmpeg.

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See you in the next one.