trouble in ffcast and ffmpeg!! " x11grab "

saeedit · 08-14-2011, 06:12 PM

Hello all out there

When i try these commands:

[
ffmpeg -r 15 -v 1 -s 1280x800 -an -f x11grab -i :0+0,0 -vcodec libx264 -vpre lossless_slow -crf 0 -f h264 -sameq "ffcast.110815031628.mkv"

result: Unknown input format: 'x11grab'
]

OR

]
ffcast -a -v
result: ffmpeg: failed, try running with --debug
]

How can i solve this?

Thanks.

David the H. · 08-15-2011, 11:34 AM

First, please use [code][/code] tags around your code, to preserve formatting and to improve readability.

Second, start by reading the error message it gave you. "Unknown input format: 'x11grab'" It's not recognizing the -f option you gave it.

So check whether you have the correct format. Run ffmpeg -formats.

Code:

$ ffmpeg -formats | grep "grab"
 D  dv1394          DV1394 A/V grab
 D  video4linux2    Video4Linux2 device grab
 D  x11grab         X11grab

So it's not x11grab, it's X11grab. Try it again with a capital X.

Here's another hint. Try putting the error messages you get into Google or another web search. Chances are you'll find that other people have had the same or similar problems.

saeedit · 08-15-2011, 03:08 PM

I'm so sorry for my ugly thread.
I'll search till finding the solution.

Best wishes.