I am only learning how to use ffmpeg with my cheap GeForce gtx1050 card.
currently I am using the following:
ffmpeg -i (inputFile) -vcodec hevc_nvenc -preset slow -global_quality
23 -rc-lookahead:v 32 -surfaces 38 -c:a copy -map 0 -sn (outputFile)
However recently I am getting the following warning: "Using
global_quality with nvenc is deprecated. Use qp instead."
the list of options confuses me, seems like -cq would be a suitable
replacement for -global_quality
-cq <int> E..V.... Set target quality level (0
to 51, 0 means automatic) for constant quality mode in VBR rate control
(from 0 to 51) (default 0)
-aud <boolean> E..V.... Use access unit delimiters
(default false)
-bluray-compat <boolean> E..V.... Bluray compatibility
workarounds (default false)
-init_qpP <int> E..V.... Initial QP value for P frame
(from -1 to 51) (default -1)
-init_qpB <int> E..V.... Initial QP value for B frame
(from -1 to 51) (default -1)
-init_qpI <int> E..V.... Initial QP value for I frame
(from -1 to 51) (default -1)
-qp <int> E..V.... Constant quantization
parameter rate control method (from -1 to 51) (default -1)
I did a google search but really can't find any good examples using gp.
Could someone give me a simple explanation of what I need to use to get
similar results to : -vcodec hevc_nvenc -preset slow
-global_quality 23 -rc-lookahead:v 32 -surfaces 38
thanks in advance,
joe
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