Yarc
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- Feb 10, 2015
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Has anyone done quality comparisions between CUDA and Software transcoding? In my experience using CUDA produces slightly inferior results.
I've just made a video quality comparison between CUDA and software encoding with The Force Awakens using exact same settings for each. I selected to compress down to 2GB file size. I compared screenshots from each version by going to the same time in the film and taking a screenshot using PDVD16. There was a slight discrepancy in time between the two versions, to get the approximate same scene in the CUDA version I had to advance an extra second, even then the scene was not exactly the same but near enough for a comparison. PDVD16's info showed the CUDA version's quality at this point to be 1.26 Mbps compared to the software version's 1.3 Mbps. So a small difference in technical detail and visually, yes I found the software version to be slightly sharper. However, when watching the film rather than pixel hunting on a still shot I don't think this would really be noticeable. With less compression, I think the visual difference would be even less noticeable. But that's just my opinion. However, when considering that the CUDA version was 5.5 times quicker to produce, I think this is a good result.