obs-ffmpeg: Add texture-based hardware AMD encoder

Adds support for texture-based AMD encoding, with both H264, HEVC, and
HDR support. Falls back to FFmpeg when texture-based encoding cannot be
used for whatever reason.

(Jim note: This is based upon obsproject/obs-studio#4538 by AMD/Luxoft
with fewer files, FFmpeg fallback for software encoding, and HDR
support. I also went to lengths to ensure that FFmpeg command line
parameters also works with it)

Co-authored-by: Jim <obs.jim@gmail.com>

plugins/obs-ffmpeg/data/locale/en-US.ini

@@ -12,6 +12,9 @@ KeyframeIntervalSec="Keyframe Interval (seconds, 0=auto)"
 Lossless="Lossless"
 Level="Level"
 
+AMFOpts="AMF/FFmpeg Options"
+AMFOpts.ToolTip="Use to specify custom AMF or FFmpeg options. For example, \"level=5.2 profile=main BPicturesPattern=3\""
+
 BFrames="Max B-frames"
 
 VAAPI.Codec="VAAPI Codec"
@@ -33,6 +36,10 @@ NVENC.CQLevel="CQ Level"
 NVENC.10bitUnsupported="Cannot perform 10-bit encode on this encoder."
 NVENC.TooManyBFrames="Max B-frames setting (%d) is more than encoder supports (%d)."
 
+AMF.Preset.speed="Speed"
+AMF.Preset.balanced="Balanced"
+AMF.Preset.quality="Quality"
+
 FFmpegSource="Media Source"
 LocalFile="Local File"
 Looping="Loop"
@@ -72,6 +79,9 @@ WarnWindowsDefender="If Windows 10 Ransomware Protection is enabled it can also
 Encoder.Error="Failed to open %1: %2"
 Encoder.Timeout="Encoder %1 is taking too long to encode (timeout: %2 seconds)"
 
+AMF.Error="Failed to open AMF codec: %1"
+AMF.GenericError="Check your video drivers are up to date. Try closing other recording software which might be using the AMD encoder such as the Radeon Software or Windows 10 Game DVR."
+
 NVENC.Error="Failed to open NVENC codec: %1"
 NVENC.GenericError="Check your video drivers are up to date. Try closing other recording software which might be using NVENC such as NVIDIA Shadowplay or Windows 10 Game DVR."
 NVENC.BadGPUIndex="You have selected GPU %1 in your output encoder settings. Set this back to 0 and try again."