I have found that rendering to any sort of quicktime wrapper seems to extend render time dramatically, yesterday i set up a render that was on multiprocessing, outputting a set of targas, a h264, and a quictime on animation settings to find that it took 9 hours to render (Ha, what a joke for 125 frames). Today i did the same render but only output the targa sequence and it took 1 hour 20 min. It seems that it gets all messed up if it can't flush itself after each frame like when it has to put together a movie rather than a sequence. Another test was a different 125 frame render to H264 took 1 hour 13min, when i do the same render and only output a sequence it only takes 17 min.
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