It takes ~30ms on my machine (4 core 8 thread - i7) to scale one frame. But the problem now seems to be sws_scale.
Then I able to solve most of the frame rate issues by asking FFMPEG to multi-thread the decode process (which was also recently added by FFmpegInterop).This made 1080p videos play much smoother, but 4k was still pretty poor. Also, decoding and scaling the frame too. First of all, audio and video pipeline are not split up into separate threads in ffmpeg interop.I had lot of issues with framerate, that's why I checked this project. I have my own uwp video project where I'm trying to play such videos. IPhones now captures videos in 1080p and 4k and as a result they have become so common.
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