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Problems rendering rotoscopes

edwardl
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Problems rendering rotoscopes

Sun Nov 24, 2013 11:47 am
Hi.
I have a project here with 9 video tracks and 4 audio tracks. For about 2 minutes I've put together a fairly simple video mix using 1-2 video tracks and one audio track (extracted audio for noise reduction), with two exceptions. One being 5 videos Composited showing important bits beside each other, the other near the end where I've Rotoscoped and Rotated 4 videos Composited to a PNG image sequence. These 2 minutes render well, but the problem comes after this.
There is a "background" video that is zoomed and slowed down. Composited to this "background" are 4 Rotated Targa image sequences (with transparent areas). Affined (with rotation) to this "background" are so far 3 Rotoscoped videos. Gonna add a 4th one. About a second into this comes 3 wav files, 2 of which are cut and have Keyframed Volume points (fadings).
The problem is when kdenlive tries to render this fine mess the renderer crashes. All videos are 1080p, 50 fps, MTS files, recorded with a JVC HD Everio. The project, however, is set to 640x400 25fps. If you are wondering why, I have my reasons.
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uname -a
Linux amastair 3.2.0-53-generic-pae #81-Ubuntu SMP Thu Aug 22 21:23:47 UTC 2013 i686 athlon i386 GNU/Linux

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kdenlive --version
kdenlive: /usr/lib/libmlt.so.5: no version information available (required by kdenlive)
kdenlive: /usr/lib/libmlt++.so.3: no version information available (required by kdenlive)
Qt: 4.8.1
KDE Development Platform: 4.8.5 (4.8.5)
Kdenlive: 0.9.6

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melt --version
melt 0.8.8
Copyright (C) 2002-2013 Ushodaya Enterprises Limited
<http://www.mltframework.org/>
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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ffmpeg --version
ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  built on Apr  2 2013 17:00:59 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Missing argument for option '-version'

I've tried rendering using different formats, even without Exporting Audio:
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Rendering of /home/edward/kdenlive/video.mpeg2 crashed

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Rendering of /home/edward/kdenlive/video.h.264 crashed

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Rendering of /home/edward/kdenlive/video.flv crashed

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Rendering of /home/edward/kdenlive/video.rm crashed

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Audio only (WAV 44khz) seems to work, but I'd hate to sit there and take screenshots of each and every frame and fit it all onto one track. Please help.

/Edward
User avatar TheDiveO
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Re: Problems rendering rotoscopes

Sun Nov 24, 2013 3:42 pm
I would suspect the speed effect of the background clip to be a possible culprit. Over all the Kdenlive versions I worked with over the past two years or so I always got bitten by the speed effect. if you try a test rendering with the speed effect disabled for the moment ... does it still crash?


TheDiveO on YouTube: diving videos and aerial (quadcopter) videos, all made with Kdenlive.
TheDiveO Blog: know-how about Protune-grading in Kdenlive, GoPro HD Hero 3, DJI Phantom Quadcopter, full face mask diving, and some more...
edwardl
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Re: Problems rendering rotoscopes

Sun Nov 24, 2013 5:43 pm
I disabled the Speed with the Eye button and removed it completely. Same crash both times (different adress numbers).

/Edward
edwardl
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Re: Problems rendering rotoscopes

Tue Nov 26, 2013 9:33 pm
Hi.
I thought I'd try and use the Extract Frame option on all the problematic frames. I save a frame, press the right arrow, save another frame, right arrow, etc... However, like 7 frames in, when I press the right arrow, nothing happens as it tries to load these composites and then the whole program crashes. I try again, typing in the exact time code I was about to save, wait a bit, crash again! I go to the background video and disable the Speed. I get to see the frame, but when I try to save the frame, it crashed. I try again, disable speed, type in time code, crash.

Edit: Just to see if I was running out of memory, I took the 9 track video composition and made it its own project, removing all unrelated files. I tried a Render, the renderer crashed without any aditional info (numbers, wavs, etc). I then proceeded to save one frame at the time. When trying to read the 17th frame, the whole thing crashed, again and again. I tried to read the other frames passed that. Crashed just the same. Removing the Speed didn't help any.

Too much for kdenlive to handle?

/Edward

 
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