capture X11 to video

[dibl]

Re: capture X11 to video

Hey, maybe you can use CDE to package up a copy of your gx11grabber and email it to me?

I never knew about that! Thanks, GG -- I'd be happy to do it, but it looks like Rog has taken care of you.

[GreyGeek]

Re: capture X11 to video

Perhaps not.
I used KPackageKit to install the Lucid deb package but it failed with a msg which my poodle blew off the screen . It said something about "KpackageKit<somefunction> doesn't have "read" parameter"".
Nothing made it to the file system nor the menu.

So, I used GDebi to reinstall it. The files got put into their appropriate places in the fs, but the menu item ended up in the ".hidden" menus. When I dragged it into the open and ran it I got the qx11grab dialog windows.

However, NO combination of video or audio driver settings I could select would record. Regardless of which settings I chose they all ceased immediately with either a video or audio error. Running it as root made no difference.
.

[Rog131]

Re: capture X11 to video

A bit more information please
(If you want help)

...either a video or audio error.

i.e here the qx11grab will make the ffmpeg command:

/usr/bin/ffmpeg -f x11grab -xerror -r 25 -s 640x480 -i :0.0+0,30 -vcodec mjpeg -r 25 -b 9800k -y /tmp/qx11grab-184109.ogg

The result will be an error (executed in the konsole or looked through the qx11grab Logfile):

Output #0, ogg, to '/tmp/qx11grab-201843.ogg':
Metadata:
encoder : Lavf52.64.2
Stream #0.0: Video: mjpeg, yuvj420p, 640x480, q=2-31, 9800 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0.0 -> #0.0
Could not write header for output file #0 (incorrect codec parameters ?)

Solution - set the output filename with the .avi extension not the default .ogg.

[img width=400 height=101]http://img689.imageshack.us/img689/198/settingsgs.png[/img]

[vinnywright]

Re: capture X11 to video

thanks Rog131

I actually added your repo this time (man you've got some cool stuff in their) and qx11grab installed fine.

it allmost takes the fun out of figuring out a CLI string that will work but as GG and you pointed out you still half to be shure you have some sane values in qx11grab.

I also got errors the first run but soon figured out how to over come them ..........now to find a mic in my junk pile's of computer stuff...... he he and see if I can get audio on one of these captures

VINNY

[GreyGeek]

Since that thread was written I've messed around and worked out this command:

ffmpeg -f alsa -i plughw -f x11grab -s 1600x900 -r 25 -i :0.0 -sameq /home/jerry/out.mpg




To get app music and sound make sure the capture button in KMixer is at max and set the mic volume to a reasonable level.
A couple of test recordings may be necessary.

[perspectoff]

Lot of instructions for screencapture using FFMPEG here:

http://ubuntuguide.org/wiki/Screencasts

[vinnywright]

LOL..........well sense this subject has come up again I decided to play around a bit and try to find a set of options that would produce a really good screen cast.
It seems as though it depends a lot on your system and the codec's you have installed ......what works for one may not work for you.

@GreyGeek yours just crashed FFMPEG with a bunch of buffer overruns @ hear

@perspectoff nice link ....but again the line provided their did not work @hear

that sed hears one that produced (for me) a capture so nice when it was playing full screen in VLC you would have sworn it was the desktop it's self 8)
but the short vid it produced was 400MIB :eek: so be careful.

ffmpeg -f alsa -ac 2 -i pulse -f x11grab -s 1366x768 -r 25 -i :0.0 -vcodec ffv1 capturedvideo.avi

the vcodec ffv1 seems to be a FFMPEG native so maby thats why it worked so well .

and hears the vid .....it's a bit fuzzier after uploading to youtube and I fell of my script a bit but it's not a big production so..........

VINNY

[GreyGeek]

Nice video, Vinney!

[vinnywright]

Nice video, Vinney!

thank you Sr .......

took 5 hours to up lode it to youtube on my slow #$$ connection



VINNY

[GreyGeek]

:eek:

Aren't the Youtube videos limited to 15 mb?

[vinnywright]

:eek:

Aren't the Youtube videos limited to 15 mb?

the last one I did before this one ....yes that was the case .........BUT this one was 400Mib ....and it took it ........so IDK ?

maby they upped the size limit for older account's ........ I just dont know?

VINNY

[claydoh]

:eek:

Aren't the Youtube videos limited to 15 mb?

15 minutes of runtime iirc.