Discussion:
[kdenlive] [Bug 401821] New: Screen Grab recording fails on Windows due to x11grab
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Jarno van der Kolk
2018-12-06 13:20:56 UTC
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https://bugs.kde.org/show_bug.cgi?id=401821

Bug ID: 401821
Summary: Screen Grab recording fails on Windows due to x11grab
Product: kdenlive
Version: 18.08.2
Platform: MS Windows
OS: MS Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: Video Display & Export
Assignee: ***@kdenlive.org
Reporter: ***@jarno.ca
Target Milestone: ---

SUMMARY
When trying to record the screen using Kdenlive on Windows, I get the error
"Unknown input format: 'x11grab'". This of course makes perfect sense since
Windows does no use X11.

However, if the Windows version of Kdenlive were to use gdigrab instead of
x11grab, this would allow the Windows version of Kdenlive to record the screen
as well.

I tested this by calling the ffmpeg.exe that comes with Kdenlive for Windows
from the Windows Command Prompt.

STEPS TO REPRODUCE
1. Start a new project
2. In the Clip Monitor, press the +
3. Select "Screen Grab"
4. Press Record

OBSERVED RESULT
Kdenlive displays "Capture crashed, please check your parameters" along with a
"show log" button. Pressing the "show log" button shows the error to be
"Unknown input format: 'x11grab'" along with the version (4.0) and compile
options of ffmpeg.

EXPECTED RESULT
The screen would be recorded.

SOFTWARE/OS VERSIONS
Windows: 10
MacOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version: 5.50.0
Qt Version: 5.11.1

ADDITIONAL INFORMATION
I really love this program!
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emohr
2018-12-08 19:18:07 UTC
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https://bugs.kde.org/show_bug.cgi?id=401821

emohr <***@gmx.net> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |***@gmx.net
Flags| |low_hanging+
Status|REPORTED |CONFIRMED
Keywords| |junior-jobs
Ever confirmed|0 |1

--- Comment #1 from emohr <***@gmx.net> ---
Thanks for reporting this issue. It seems easy to fix. I marked it as a junior
job.
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