Re: Windows, “play” bug with space key

Eugen Mohr eugen.mohr at
Wed Aug 1 18:46:23 BST 2018

Is there some interaction between MLT and audio to block playing?

When I move the sliders back and forth in an effect (doesnt' matter 
which one) I see on the VU-Meter of the project monitor the white peek 
line each time goes down a bit until is gone on the left site.

Am 01.08.2018 um 12:00 schrieb Eugen Mohr:
> I made further tests:
> Open Kdenlive 18.04.1d on Windows 7. Load a project. Start playing 
> with hit space bar. Stop playing hit space bar again. Then playing 
> works only if I hit space bar and the arrow key right.
> If the timeline contains 2 clips above each other (on video 1+2) and 
> they are connected with a composition playing works more smooth. Even 
> after hitting space bar several times starts/stops the video correctly.
> After 27 times hitting space and arrow right it appears a time lag 
> between 2-3 seconds to react on hitting the space bar or click the 
> play button. After this 27 times I can only play with CTRL-SPACE and 
> while the video is playing clicking into the timeline to other 
> positions. Or while play is off I press constantly the arrow key right 
> for playing. And only when play is off I can click the play heat onto 
> a new position.
> Am 27.05.2018 um 10:16 schrieb Eugen Mohr:
>> Maybe I found the “root cause” of the “play” bug in Windows.
>> It has something to do with the Processing Threads in the Environment 
>> menu.
>> Processing Threads = 1 -> start/stop with space doesn’t work. Frame 
>> by frame with the arrow key work. All other key commands work.
>> Processing Threads = 2 or bigger -> start/stop with space work! But: 
>> frame by frame with the arrow key and all other key commands doesn’t 
>> work!
>> Maybe something to do with the type of compiling for Windows?
>> Merlimau

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