Bug 401821

Summary:	Screen Grab recording fails on Windows due to x11grab
Product:	[Applications] kdenlive	Reporter:	Jarno van der Kolk <jarno>
Component:	Rendering & Export	Assignee:	Jean-Baptiste Mardelle <jb>
Status:	RESOLVED FIXED
Severity:	normal	CC:	fritzibaby
Priority:	NOR	Keywords:	junior-jobs
Version:	18.08.2	Flags:	fritzibaby: low_hanging+
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Jarno van der Kolk 2018-12-06 13:20:56 UTC

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!

Comment 1 emohr 2018-12-08 19:18:07 UTC

Thanks for reporting this issue. It seems easy to fix. I marked it as a junior job.

Comment 2 emohr 2020-03-08 16:50:48 UTC

This is fixed in 19.12.3. Use view -> Screen grab. Make sure that the paths to FFMPED in settings environment are set properly.

We close this bug. If it still appears in the latest version, please feel free to re-open it and update the affected version number.