Cut an online video with ffmpeg

OS ffmpeg

Created At : 2022-01-11 10:15

Count:680 Views 👀 :

Cut an online video with ffmpeg
Why ffmpeg
Trick
My idea
My script
End

Cut an online video with ffmpeg

Tips Linux

Created At : 2022-01-11 03:15

Count:651 Views 👀 :2186

Why ffmpeg

This tool can decode a video and re-encode it.
You can remove the audio or the video, change the codec or use it to stream a file.

Trick

You can input a youtube video without downloading it, to do this you need youtube-dl.

youtube-dl -f best --get-url https://www.youtube.com/watch?v=H8w_Q57RQJc

https://rr3---sn-n4g-ouxs.googlevideo.com/videoplayback?expire=1641865369&ei=OYzcYZ7yKNuMxN8P7feTIA&ip=93.23.130.72&id=o-AO5ZLYd00XMxzT1PjKh0Grtrh-mtnzmQcTys0s1Fx-UI&itag=18&source=youtube&requiressl=yes&mh=Q-&mm=31%2C29&mn=sn-n4g-ouxs%2Csn-n4g-jqbed&ms=au%2Crdu&mv=m&mvi=3&pl=21&initcwndbps=1763750&vprv=1&mime=video%2Fmp4&ns=R-N0c7jT-8ZOyFPbWVfuYpAG&gir=yes&clen=139964871&ratebypass=yes&dur=6538.507&lmt=1540303910458790&mt=1641842946&fvip=5&fexp=24001373%2C24007246&c=WEB&txp=5531432&n=tXjNIa-Hi2X8YEz&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cratebypass%2Cdur%2Clmt&sig=AOq0QJ8wRgIhAPRj1ix2t8yS_B3M3QQaY0dCz4l-AaDkvF4r-sutJ50_AiEAk_E3dott1d4QWuDUqQkcSPtBRzIQi-rcNVeOV4Fg53E%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRQIgJInz5xNfosh2ocbFn41qMlAjCzdgTG0Xu3FjciwFCTkCIQCl7Jn3sVBFAmEnfXFmdH4k35tRXbMBB406wbAnyOLElQ%3D%3D

If you click on the big link you can see the video without the youtube things.

now ffmpeg can read the video with this link.

The command to get the youtube link is too big, so I’m gonna wrap it into a variable.

link=$(youtube-dl -f best --get-url https://www.youtube.com/watch?v=H8w_Q57RQJc)

ffmpeg -i $link output.mp3

My idea

I wanted to download every song in one youtube video, it was a pretty bad idea…
For exemple I wanted the full Album of VA-11 HALL-A.

I had to enter every title and every time code one by one.
I made the script in one afternoon and I took some time to understand how the programe work.

So, to download a specific moment of the video you have to use -ss with ffmpeg to indicate when it start,
and use t for the duration or to for the next time code.

ffmpeg -i "$vid" \
	-ss 0 -to 120 "output.mp3"

So with it you can pick the song you like in theres lists on youtube.

My script

This is my script, you have to guess how to use it, lol.
It’s made by a pro so it will be easy ( ͡° ͜ʖ ͡°).

vid=$(youtube-dl -f best --get-url $1)
listtime=("0")
listtitle=()
i=0
while true
do
	echo -e "The end: "
	read time
	echo -e "The title: "
	read title
	title=str="${title// /_}"
	listtime+=("$time")
	listtitle+=("$title")
	echo -e "1: Continue "
	echo -e "2: Start download"
	echo -n ": "
	read choix	
case $choix in
		1)
		clear
		;;
		2)
		echo -n "bye"
		clear
		break
		;;	
esac
done
i=0
while [ $i -ne ${#listtitle[@]} ]
do
	title=${listtitle[$i]} 
	start=${listtime[$i]}
	((i++))
	end=${listtime[$i]}
	title=${title:4}
	ffmpeg -i "$vid" \
		-ss $start -to $end "${title}.mp3"
done

End

Don’t do what I’ve done, it’s useless, it’s faster to download the musics on 1337 or somewhere else.
you can use it if you like a song and want to pick this one amoug every songs.

Built with Hexo and 3-hexo theme