Hello, We Plan to test HEVC 8K encoder with Codec SDK 7.0.
HardWate:
CPU: Intel I7 6700, GPU: GTX 1070
What’s new in Video Codec SDK 7.0
HEVC 8K (8192 pixels x 8192 pixels) encoding
HEVC 4:4:4 encoding
HEVC 10-bit encoding
HEVC lossless encoding
HEVC Sample Adaptive Offset (SAO)
HEVC Motion-Estimation-(ME)-only mode
HEVC (up to 8K) decoding
VP9 (up to 8K) decoding
HEVC long term reference (LTR) frame support
Asynchronous H.264 Motion-Estimation-(ME)-only mode
Look-ahead
Improved H.264 spatial adaptive quantization
H.264 temporal adaptive quantization
Rate control and quality improvements
So question 1 is a YES
Encoder quality+performance(fps)+latency depends on encoder configuration (~10 parameters or using parameter presets like NV_ENC_PRESET_LOW_LATENCY_DEFAULT_GUID).
The expected performance per chip (GTX1070 = GP104-200 = Pascal) is in application note [url]https://developer.nvidia.com/nvenc-application-note[/url] (presented values for 1920x1080/YUV4:2:0, 8 bit). But be aware, the performance depends also on bus width and frequency and some chips have two encoding units so you must test it with your card. (Update: number of encoders now published [url]https://developer.nvidia.com/video-encode-decode-gpu-support-matrix[/url])
The values from the application note are about what I get, so it is a good reference.
However for live HEVC encoding quality is not as good as eg x265. It is really missing b frames :(