[bleep42]

ffmpeg: hevc: Fixes for ffmpeg 4 (680c1487)

 I still see a bad performance with that high bitrate Elysium video (compared to a ffmpeg 3 builds).     

Hi, I've been on hols, so have only just caught up. :-)
Please note the Elysium video is very much only a testing file, to be honest I never expected the Pi, of any sort, to be able to play it without stepping, I would certainly never use such high quality factor/bit rate for normal video file compression/viewing; I only use it, and others at lower bit rates, to see how the HEVC decoding is improving over time.
So I was surprised when the update ffmpeg 4.0-Leia-Alpha-1 came out that there was an approximate 10% CPU usage, step backwards while decoding, ie the sample Elysium file, which was easily playing before 4.0-Leia-Alpha-1 with about 10% spare, even at peak times, suddenly was maxing out at 100% at peak times, even sometimes stepping (on a Pi3B+).
I realise that there may well have been other under the hood improvements in quality, sharpness, etc... I don't know?
I was mearly pointing out, to those concerned, that there had been an apparent retrograde step, as far as HEVC decoding was concerned, I note that there have been a couple of further ff-mpeg updates recently, these have made a very small improvement in CPU usage, but nothing like it was before.
Regards,
Kevin Moore.