Screen Recording Using FFmpeg X11grab & Xwininfo - Ubuntu 10.04

code: http://paste2.org/p/1203300

to install xwininfo, is under a different name
sudo apt-get install x11-utils

compile ffmpeg:
http://www.youtube.com/watch?v=VEYUoxnJ5jA

cut files:
http://www.youtube.com/watch?v=4uKE1xbUhHo

convert for youtube
http://www.youtube.com/watch?v=upVmBYpOUbc

bash alias:
http://www.youtube.com/watch?v=Xywy_muJRjQ

guake:
http://www.youtube.com/watch?v=VvHbpQYlgmg

Credits:
http://isparse.net/?p=229
http://isparse.net/?p=239
http://ubuntuforums.org/showthread.php?t=1392026
http://verb3k.wordpress.com/2010/01/26/how-to-do-proper-screencasts-on-linux/

Category:

Science & Technology

Tags:

• Screen
• Recording
• Using
• FFmpeg
• X11grab
• Xwininfo
• Ubuntu
• 10.04
• linux
• terminal
• xwininfo
• ffmpeg
• x11grab
• screencast
• record
• capture
• screen
• cli
• recordmydesktop
• sucks
• single
• window
• fullscreen
• specific
• size
• recorditnow
• effects
• encode
• on
• the
• fly

[theotherscientist]

can't somebody make a tutorial that starts with: for the following tutorial you need to install: .... and show how? Not just jump into the middle and start clicking around? I constantly get ultrafast not found, even though I installed the libx264

[gotbletu]

@theotherscientist theres stuff in the descriptions, which nobody looks at.

[richardsheppardaroq]

Thank you very much for showing how you did that gotbletu - it got me headed down the right path.

I'm running Arch Linux, and I'm not sure if it's why I had problems using your script 'as is', but I managed to make it work with:

ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $WIN_GEO -i :0.0+$WIN_XY -acodec libvorbis -vcodec libx264 -preset ultrafast -threads 0 -y output-single.mkv

[gotbletu]

@richardsheppardaroq yea this vid is a year old, u usually just need to edit the presets since ffmpeg changes those

[TheMelnTeam]

GTK on the fly is :(. ffmpeg Lossless recording creates absolutely huge file sizes though so people can opt to allow non lossless and ffmpeg can still put up impressive quality with file size no other software I've seen touch. Some problems:

1.  Audio is off about 1 sec, somehow at video start (it never desyncs further, even on long recordings). Right now I just bypass that with an offset command after.

2. I want to record 2 audio streams (mic and game sound), don't know how.

[gotbletu]

@TheMelnTeam check my others vids on sound and mic

[caballerogaona]

how to install that software?

[Nele8808]

Do you zoom in using ffmpeg?

[gotbletu]

@OniLinkPlus try using alsamixer and disable the other open sound, if any.

[OniLinkPlus]

I'm using your capture script, but I have a slight problem. The audio I capture has this strange buzzing sound which screws with my voice. Have you ever heard of this?