Topic: Offline rendering speed

Viewing 3 posts - 1 through 3 (of 3 total)
  • July 29, 2010 at 11:23 #2324
    kyran
    Participant

    Is there a reason why offline rendering the master track doesn’t use my entire cpu? The load never goes over 30% on my quad core machine. So I assume it’s just using one core/thread for the rendering.
    It’s actually faster to put a recorder effect on the master chain and just record the playback. It is quite annoying having to wait 15 minutes for a 3 minute track to render.

    I haven’t tested this, but I assume this behaviour is the same when offline bouncing a track, as the mechanism used is the same IIRC.

    It might be a bug, but it also might just be me missing a setting somewhere. All input is appreciated 🙂

    July 30, 2010 at 11:48 #19016
    Zynewave
    Keymaster

    It depends on how many plugins you have in your arrangement. A plugin chain on a single track can only use one cpu-core, because each plugin depends on the finished output of the previous plugin. So if you only have plugins on your master track, then only one core can be used. That’s the same in realtime and offline rendering. If the offline render is slower than realtime, then I would think a plugin is to blame. Some plugins may not be capable of doing faster than realtime, and thus may block the offline render. Try switching out the plugins to see if one of them is to blame.

    July 30, 2010 at 11:59 #19017
    kyran
    Participant

    Even if it’s a plugin it’s quite strange. I would assume that in the worst case the offline render would be just as fast as the realtime playback.

    When I have some spare time, I’ll experiment to find out which plugin causes this behaviour.

    During realtime playback I get around 50% cpu load (ie about 2 cores), which is fine.

    edit: do you pass any special flags to the plugins when doing an offline bounce? If you do not, then it probably is not a plugin problem.

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