Hide

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

OpenID
or
Sign in Register

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Hide

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

Hide

News

2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.
Hide

Tags

Hide

Functions

Hide

Credits

Site by David Winterbottom (user root).

Commands matching x11grab

Commands matching x11grab from sorted by
Terminal - Commands matching x11grab - 10 results
ffmpeg -f x11grab -s wxga -r 25 -i :0.0 -sameq /tmp/out.mpg
2009-02-05 17:23:43
User: wwest4
188
Up
Down
Capture video of a linux desktop
Comments (14) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/outputFile.mpg
2009-06-05 21:11:17
User: dcabanis
Tags: video X11 ffmpeg
36
Up
Down
Record a screencast and convert it to an mpeg

Grab X11 input and create an MPEG at 25 fps with the resolution 800x600

Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 30 -s 1024x768 -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 ./Desktop/mydesktop.mkv
2011-09-29 19:50:41
User: dcabanis
7
Up
Down
Recording the desktop and an application audio source for webcast

You will have to use the sound preferences (record) to choose the audio source and set it to internal.

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ffmpeg -f x11grab -s `xdpyinfo | grep 'dimensions:'|awk '{print $2}'` -r 25 -i :0.0 -sameq /tmp/out.mpg > /root/howto/capture_screen_video_ffmpeg
2010-03-27 21:31:34
User: brubaker
Functions: awk grep
Tags: ffmpeg awk
5
Up
Down
Capture video of a linux desktop
Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ffmpeg -y -f alsa -ac 2 -i pulse -f x11grab -r 30 -s `xdpyinfo | grep 'dimensions:'|awk '{print $2}'` -i :0.0 -acodec pcm_s16le output.wav -an -vcodec libx264 -vpre lossless_ultrafast -threads 0 output.mp4
2010-11-19 09:31:56
User: NoahY
Functions: awk grep
5
Up
Down
Capture video of a linux desktop

Proper screencast with audio using ffmpeg and x264, as per http://verb3k.wordpress.com/2010/01/26/how-to-do-proper-screencasts-on-linux/

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
gorecord() { if [ $# != 1 ]; then echo 'gorecord video.mp4' return fi ffmpeg -f x11grab -s <resolution> -r 25 -i :0.0 -sameq -vcodec mpeg4 "$1" }
2010-03-29 20:21:35
User: meathive
Functions: echo return
3
Up
Down
High resolution video screen recording
gorecord foo.mp4

I've tried all of the screen recorders available for Linux and this is easily the best. xvidcap segfaults; VNC is too much hassle. There are alternatives of this command already here that I am just too lazy to reply to. Messing with the frames per second option, -r, 25 seems to be the best. Any lower and the video will look like a flipbook, if it records at all - -r 10 won't - any faster is the same, oddly enough.

Edit: CLF doesn't like my long command to add audio, so here it is in the description.

goaddaudio() { if [ $# != 3 ]; then echo 'goaddaudio < audio > < src video > < dst video >' return fi f=goaddaudio$RANDOM ffmpeg -i "$2" &> $f d=$( grep Duration $f | awk '{print $2}' | tr -d ',' ) && rm $f && ffmpeg -i "$1" -i "$2" -r 25 -ab 192k -ar 44100 -sameq -t $d "$3" }
Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ffmpeg -f alsa -itsoffset 00:00:02.000 -ac 2 -i hw:0,0 -f x11grab -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -r 10 -i :0.0 -sameq -f mp4 -s wvga -y intro.mp4
2010-03-31 09:33:05
User: mohan43u
Functions: awk grep
Tags: ffmpeg awk grep alsa xwininfo x11grab mp4 wvga
3
Up
Down
Capture screen and mic input using FFmpeg and ALSA

Yet another x11grab using ffmpeg. I also added mic input to the capturing video stream using alsa. Yet I need to find out how to capture audio which is currently playing.

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y output.mkv
2010-10-04 19:56:02
User: Bonster
Functions: awk grep
2
Up
Down
Screencast with ffmpeg x11grab

requires ffmpeg & xwininfo to be installed

replace hw:0,0 with pulse if you like using pulseaudio

press q to quit

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
gnome-terminal -e "bash -c \"ffmpeg -f x11grab -r 25 -s $(xwininfo -root |sed -n 's/ -geometry \([0-9x]*\).*/\1/p') -i :0.0 -vcodec huffyuv -sameq ~/Desktop/screencast.avi; exec bash\""
2011-08-15 01:59:50
User: o0110o
1
Up
Down
A video capture command which can be assigned to a keyboard shortcut.

A video capture command which can be assigned to a keyboard shortcut.

Comments (3) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
ffmpeg -f alsa -i default -f x11grab -s sxga -r 10 -i :0.0 -f mp4 -s vga -sameq out.mp4
2011-09-18 15:10:56
User: unixmonkey21861
Tags: ffmpeg
0
Up
Down
capture screen and mic

sxga ==> 1280x1024

vga ==> 800x600

------------------------------------------------

xwininfo -root | grep geometry

------------------------------------------------

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate