Sorry for the top-post, unintentionally.
The high thread count caused significant quality reduction with older
I'll run some tests with the newer versions and post the results.
In most cases there is no reason for multi threaded decoding.
On the other hand 4 threaded x264 encoding runs 2.5-3 times faster than a
single threaded encoding, assuming that there are enough free CPU.
With 4 threads the quality insignificantly lower, almost invisible.
Unfortunately, I did not keep the PSNR results.
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