Neither of those two criteria are good enough to judge whether hardware acceleration is working or not.
Take a 5 minute sequence. Add a few accelerated effects. Export with and without hardware acceleration. If it's working, export will be noticeably faster with CUDA on. If the times are the same, something is wrong.
What is the source footage being used? Please list the frame size, along with codec type and bitrate etc.
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I will try this now, thanks
It is footage taken off a Go Pro hero 2 (MP4, 1280X720, 59 FPS, Data rate = 15010kbs).
It seems to stutter without any effects added.
Hi Jim Simon
I tried what you told me to do, and you were right The accelerated export went around 3.5X faster than the software only. Six minutes of 1280x720 Mp4 footage took about 3.5 minutes to export to H.264 and the non acclerated took about 11 minutes.
I forgot to mention that I was also speeding up the footage through time-remapping, so maybe that was where I was having trouble with the jerky footage. I was under the impression that time remapping was also accelerated, maybe asking too much!
Thanks for your help.
Even though certain effects/scaling are acclerated by the GPU, the decoding of the footage itself is handled by your CPU. The type of source footage you're using is H.264/AVC video, and this type of content is very hard on your CPU because it's heavily compressed. So you're CPU is having to decode this heavily compressed media.
However your CPU should be handle to AVC media anyways though.