Recently I've built vslsmashsource.dll with last available ffmpeg libs. As result I can decode H264 with cpu, cuvid and quicksync decoders from lsmas.LWLibavSource.
While testing, I found that DGDecodeNV and cuvid decoder from vslsmashsource performs on approx. the same speed (250 fps on my GTX 750), DGDecodeIM and qsv decoder differs: ~120 fps vs. ~380 fps (i5-4670k). Is there some limitation in DGDecodeIM?
P.S.: I know you're busy with tonemap stuff right now, so feel free to check things here once you done with it.
This is the home of QuickSync (aka Intel Media SDK) stuff.
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To be honest, DJ, I haven't looked at DGIM stuff for many years and it's still using an old Intel SDK. Let me get the next release of DGHDRtoSDR out and then I'll have a look at it. I placed a shortcut to this thread on my desktop so I don't forget.