[kdenlive] Rendering with -3 MLT threads

[Harald Albrecht]

Hi,
in my past six or seven projects I've tested final rendering of these projects using three MLT threads (not counting ffmpeg multithreading for decoding and encodingy). My results were always very positive: a speedup between 2x and 2.5x in rendering and never any corruption or memory issues. Before, my i7 rrely got above 30% usage, now I get 80%, and more, depending on what compositing madness I do in my projects.
I'm thus asking to add an experimental feature to the master branch to enable MLT rendering using between 1 and 3 threads. The current multithread rendering option instead controls ffmpeg decoding and encoding and can be kept as is; albeit I suggest changing its textual description to better reflect its nature.
With best regards, Harald
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/kdenlive/attachments/20160409/c5f13c47/attachment.html>