Hi!

I'm trying to reduce the time that my videos are created. There are a method to speed up renders???
My current profile:

"/usr/bin/melt" "/tmp/kde-jordiMFuSFg/kdenlivefB2247.mlt -profile atsc_1080p_50 -consumer avformat:/home/jordi/Diània.tv/BARXETA/Bilbeny/JordiBilbeny.mp4 progress=1 f=mp4 hq=1 acodec=aac ab=192k ar=48000 pix_fmt=yuv420p vcodec=libx264 minrate=0 vb=6000k g=250 bf=3 b_strategy=1 subcmp=2 cmp=2 coder=1 flags=+loop flags2=dct8x8 qmax=51 subq=7 qmin=10 qcomp=0.6 qdiff=4 trellis=1 aspect=@16/9 threads=1 real_time=-1"

Is a Project with MTS files (Canon HF G10), Titles, Flac Audio file... But the Speed is slowwww...
:(


I'm catalan. Sorry for my english! :)

We just edited a 1 hour video and had the same slow render. In fact, it was so slow that we aborted it and pondered our fate.
Our video is 1920 x 1080 DNxHD 145Mb/s 30fps no proxy.
Kdenlive is 0.9.5 from GIT
MLT is 0.8.8 from GIT
OS is OpenSuse 12.1 64-bit

On a guess, we pondered converting the Affine transitions to Composite. Then we did a render test of a 1 minute segment that was entirely either Affine or Composite.

RESULTS for 1 minute render:
=================================
Affine - 8 minutes to render
Composite - 1 minute to render

Our 1 hour project rendered in 3 hours once we converted from Affine to Composite.

We understand that Affine is the new improved and preferred method, but all we were doing was hard cuts from one camera to the other. I wonder if anyone else has noticed this.

@kukat, what processor do you have and have you tried setting encoder threads equal to cores? So a four core processor, 4 encoder threads? It halves render times for me.

@Stevej, interesting results, I have a bug report open regarding other matters between Affine and Composite, in that Affine appears to skew colors in the rendered output, greys go greenish, Project Monitor vs Affine output differs. Where as Composite looks wrong in Project Monitor but encodes correct colors in render.

http://www.kdenlive.org/mantis/view.php?id=2934

Hi!!!
Thanks for the answer.

I have a Intel Core i3 - 370M Processor, and 4GB DDr3. and Ati HD Radeon 5470.

.mmmm...if I put a "4" on Encoder Threads I have more speed??? :D

My Kdenlive Project:




7 hours for rendering!! with 3 encoder threats to H264 mp4... 1 time only encode, with 8000 video audio 256..

Your MTS files are from the Canon HF G10?

Does it have a 50P 1920x1080 shooting mode to match your 1080 50P project?

Or is the camera 50i shooting mode? 1080_50i project?

If MLT is adjusting the frame rate of your source from 50i to match your project 50p then that might be part of the reason for such a long render time for a 30mins duration?