如何下载YouTube视频？

#1 楼

sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl
sudo chmod a+rx /usr/local/bin/youtube-dl

sudo -H pip install --upgrade youtube-dl

sudo apt-get install youtube-dl

youtube-dl [VIDEO_LINK]

man youtube-dl

#2 楼

sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl
sudo chmod a+rx /usr/local/bin/youtube-dl

sudo -H pip install --upgrade youtube-dl

youtube-dl YouTube-(or-other-website)-video-link

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#6 楼

sudo apt-get install wget

#!/usr/bin/perl -T

use strict;
use warnings;

#
##  Calomel.org  ,:,  Download YouTube videos and music using wget
##    Script Name : youtube_wget_video.pl
##    Version     : 0.38
##    Valid from  : March 2014
##    URL Page    : https://calomel.org/youtube_wget.html
##    OS Support  : Linux, Mac OSX, OpenBSD, FreeBSD or any system with perl
#                `:`
## Two arguments
##     YouTube URL from the browser
##     Prefix to the file name of the video (optional)
#

############  options  ##########################################

# Option: what file type do you want to download? The string is used to search
# in the YouTube URL so you can choose mp4, webm, avi or flv. mp4 seems to
# work on the most players like Android, iPod, iPad, iPhones, VLC media player
# and MPlayer.
my $fileType = "mp4";

# Option: what visual resolution or quality do you want to download? List
# multiple values just in case the highest quality video is not available, the
# script will look for the next resolution. You can choose "highres" for 4k,
# "hd1080" for 1080p, "hd720" for 720p, "itag=18" which means standard
# definition 640x380 and "itag=17" which is mobile resolution 144p (176x144).
# The script will always prefer to download the highest resolution video format
# from the list if available.
my $resolution = "hd720,itag=18";

# Option: How many times should the script retry the download if wget fails for
# any reason? Do not make this too high as a reoccurring error will just hit
# YouTube over and over again.
my $retryTimes = 5;

# Option: do you want the resolution of the video in the file name? zero(0) is
# no and one(1) is yes. This option simply puts "_hd1080.mp4" or similar at the
# end of the file name.
my $resolutionFilename = 0;

# Option: turn on DEBUG mode. Use this to reverse engineering this code if you are
# making changes or you are building your own YouTube download script.
my $DEBUG=0;

#################################################################

## Initialize retry loop and resolution variables
$ENV{PATH} = "/bin:/usr/bin:/usr/local/bin";
my $prefix = "";
my $retry = 1;
my $retryCounter = 0;
my $resFile = "unknown";
my $user_url = "";
my $user_prefix = "";

## Collect the URL from the command line argument
chomp($user_url = $ARGV[0]);
my $url = "" if ($user_url =~ m/^([a-zA-Z0-9\_\-\&\?\=\:\.\/]+)$/ or die "\nError: Illegal characters in YouTube URL\n\n" );

## Declare the user defined file name prefix if specified
if (defined($ARGV[1])) {
    chomp($user_prefix = $ARGV[1]);
    $prefix = "" if ($user_prefix =~ m/^([a-zA-Z0-9\_\-\.\ ]+)$/ or die "\nError: Illegal characters in filename prefix\n\n" );
}

## Retry getting the video if the script fails for any reason
while ( $retry != 0 && $retryCounter < $retryTimes ) {

    ## Download the html code from the YouTube page suppling the page title and the
    ## video URL. The page title will be used for the local video file name and the
    ## URL will be sanitized and passed to wget for the download.
    my $html = `wget -4Ncq -e convert-links=off --keep-session-cookies --save-cookies /dev/null --no-check-certificate "$url" -O-`  or die  "\nThere was a problem downloading the HTML file.\n\n";

    ## Format the title of the page to use as the file name
    my ($title) = $html =~ m/<title>(.+)<\/title>/si;
    $title =~ s/[^\w\d]+/_/g or die "\nError: we could not find the title of the HTML page. Check the URL.\n\n";
    $title =~ s/_youtube//ig;
    $title =~ s/^_//ig;
    $title = lc ($title);
    $title =~ s/_amp//ig;

    ## Collect the URL of the video from the HTML page
    my ($download) = $html =~ /"url_encoded_fmt_stream_map"(.*)/ig;

    # Print all of the separated strings in the HTML page
    print "\n$download\n\n" if ($DEBUG == 1);

    # This is where we look through the HTMl code and select the file type and
    # video quality.
    my @urls = split(',', $download);
    OUTERLOOP:
    foreach my $val (@urls) {
    #   print "\n$val\n\n";

        if ($val =~ /$fileType/) {
            my @res = split(',', $resolution);
            foreach my $ress (@res) {
                if ($val =~ /$ress/) {
                    print "\n\nGOOD\n\n" if ($DEBUG == 1);
                    print "$val\n" if ($DEBUG == 1);
                    $resFile = $ress;
                    $resFile = "sd640" if ( $ress =~ /itag=18/ );
                    $resFile = "mobil176" if ( $ress =~ /itag=17/ );
                    $download = $val;
                    last OUTERLOOP;
                }
            }
        }
    }

    ## Clean up the URL by translating unicode and removing unwanted strings
    $download =~ s/\:\ \"//;
    $download =~ s/%3A/:/g;
    $download =~ s/%2F/\//g;
    $download =~ s/%3F/\?/g;
    $download =~ s/%3D/\=/g;
    $download =~ s/%252C/%2C/g;
    $download =~ s/%26/\&/g;
    $download =~ s/sig=/signature=/g;
    $download =~ s/\u0026/\&/g;
    $download =~ s/(type=[^&]+)//g;
    $download =~ s/(fallback_host=[^&]+)//g;
    $download =~ s/(quality=[^&]+)//g;

    ## Clean up the URL
    my ($youtubeurl) = $download =~ /(http?:.+)/;

    ## URL title additon
    my ($titleurl) = $html =~ m/<title>(.+)<\/title>/si;
    $titleurl =~ s/ - YouTube//ig;
    $titleurl =~ s/ /%20/ig;

    ## Combine the YouTube URL and title string
    $download = "$youtubeurl\&title=$titleurl";

    ## A bit more cleanup as YouTube
    $download =~ s/&+/&/g;
    $download =~ s/&itag=\d+&signature=/&signature=/g;

    ## Combine file variables into the full file name
    my $filename = "unknown";
    if ($resolutionFilename == 1) {
        $filename = "$prefix$title\_$resFile.$fileType";
    }
    else {
        $filename = "$prefix$title.$fileType";
    }

    ## Process check: Are we currently downloading this exact same video? Two of the
    ## same wget processes will overwrite themselves and corrupt the video.
    my $running = `ps auwww | grep [w]get | grep -c "$filename"`;
    print "\nNumber of the same wgets running: $running\n" if ($DEBUG == 1);
    if ($running >= 1)
    {
        print "\nAlready $running process, exiting." if ($DEBUG == 1);
        exit 0;
    };

    ## Print the long, sanitized YouTube URL for testing and debugging
    print "\n$download\n" if ($DEBUG == 1);

    ## Print the file name of the video collected from the web page title for us to see on the cli
    print "\n Download: $filename\n\n";

    ## Background the script. Use "ps" if you need to look for the process
    ## running or use "ls -al" to look at the file size and date.
    fork and exit;

    ## Download the video
    system("wget", "-4Ncq", "-e", "convert-links=off", "--load-cookies", "/dev/null", "--tries=10", "--timeout=20", "--no-check-certificate", "$download", "-O", "$filename");

    ## Print the error code of wget
    print "     error code: $?\n" if ($DEBUG == 1);

    ## Exit Status: Check if the file exists and we received the correct error code
    ## from system call. If the download experienced any problems the script will run again and try
    ## continue the download till the file is downloaded.

    if ($? == 0 && -e "$filename" && ! -z "$filename")
    {
        print " Finished: $filename\n\n" if ($DEBUG == 1);
        $retry = 0;
    }
    else
    {
        print STDERR "\n FAILED: $filename\n\n" if ($DEBUG == 1);
        $retry = 1;
        $retryCounter++;
        sleep $retryCounter;
    }

} # while

#### EOF #####

chmod 755 youtube_wget.pl

#7 楼

cclive -s best http://youtu.be/D6z6hn6wZlg

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#11 楼

youtube-dl -U

youtube-dl -c -t URL_HERE

youtube-dl -c -t -a urls.txt

#12 楼

sudo wget https://yt-dl.org/downloads/latest/youtube-dl -O /usr/local/bin/youtube-dl && sudo chmod a+x /usr/local/bin/youtube-dl

sudo apt-get install youtube-dl

xargs youtube-dl

#13 楼

sudo add-apt-repository ppa:clipgrab-team/ppa
sudo apt-get update && sudo apt-get install clipgrab

#14 楼

$ sudo apt-get install python-pip
$ sudo pip install --upgrade youtube_dl

$youtube-dl <video_url>

$ youtube-dl -citw <playlist_url>

$ youtube-dl -citw ytuser:<channel_name>

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#19 楼

sudo apt-add-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install youtube-dlg

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#21 楼

#!/bin/bash
#
# grabflash
#
# Finds any cached Flash videos in the kernel file handles list
# and copies them to the user Videos folder ; this gets around
# the new Flash players habit of opening a cache file in /tmp
# and immediately deleting it.
#
# Usage: Play the video until it's all cached. Run script.
#        The video will be copied to ~/Videos folder as FLV.
#

for I in $(pgrep -f libflashplayer.so)
    do ls -l /proc/$I/fd/* | \
    grep '/tmp/Flash' | \
    grep -o "/proc/$I/fd/\S*" | \
    xargs --no-run-if-empty cp -t ~/Videos/
done

#22 楼

$ sudo apt-get install libavcodec-extra-53

$ sudo apt-get install ffmpeg

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#25 楼

wget https://yt-dl.org/downloads/2014.08.10/youtube-dl
chmod a+x youtube-dl

./youtube-dl https://www.youtube.com/watch?v=QRPVy_t1_IE

./youtube-dl https://www.youtube.com/watch?v=QRPVy_t1_IE -F

./youtube-dl https://www.youtube.com/watch?v=QRPVy_t1_IE -f 38

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