[Cin] HEVC hw encoding on AMD Polaris cards

[Phyllis Smith]

@spitsyn.andrey:

Thanks for the script file.  Give me some time to ask GG if there is a way
to add this to the shell commands to let you do this inside of Cinelerra.
The limitation of *passing the filename is the problem*.  When gg added
{cinelerra_path}/doc/RenderMux.sh he saved the variable name used from the
Render menu, but in this case that is not available obviously.  Maybe he
can save the last loaded filename and use that.  I will see what he
thinks.   Phyllis

Here the script file:
>
> #!/bin/bash
>
> filename="$1"
> fileout="${filename%.*}"
> proxy="6"
> # Hardware encode AMD
> ffmpeg -threads 2 -hwaccel vaapi  -vaapi_device /dev/dri/renderD128  -i
> "$1" -c:v h264_vaapi -vf
> "format=nv12,hwupload,scale_vaapi=iw/'$proxy':ih/'$proxy'" -vcodec
> h264_vaapi  -preset fast -c:a copy -bf 0 -profile:v 66
> "$fileout".proxy"$proxy"-mp4.mp4
>
>
>
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