Radeon RX580 and trouble with Ffmpeg

[Jim]

Today the Radeon RX580 graphics card I bought arrived.  To get the 
drivers for the card, I went here

https://www.amd.com/en/support  where I downloaded 
amdgpu-install_6.0.60002-1_all.deb

Next I started following the instructions at 
https://amdgpu-install.readthedocs.io/en/latest/ then I started running 
into problems.

amdgpu-install --vulkan=amdvlk,pro gave me 2 errors:

E: Unable to locate package vulkan-amdgpu-pro and the same for 
vulkan-amdgpu-pro:i386

I kept going and entered amdgpu-install -y  --usecase=workstation

That returned the errors Unable to locate package amdgpu-pro and 
amdgpu-pro-lib32

With the error messages I figured I'd have problems, but I tried to find 
out if I could use the hardware acceleration so I entered|:|

|ffmpeg -i input.mp4 -c:v h264_amf -c:a copy output.mp4

That gave me several errors.  The first one was [h264_amf @ 
0x562e1f855380] DLL libamfrt64.so.1 failed to open|

|So I tried sudo updatedb and locate libamfrt64.so.1 which returned 
nothing. That told me the file wasn't there.|

|I tried to transcode a file with Handbrake but it didn't show h264_amf 
among the available codec options.|

|I tried searching for how to install libamfrt64.so.1 but all I got was 
references to steps I already tried.
|

|Did I make a mistake somwhere or does AMD need to fix something?|

|Thank for your help.|

|Jim
|
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