ptch it bro

Dockerfile.transcode

@@ -0,0 +1,36 @@
+FROM golang:1.23-alpine AS builder
+
+ARG GO_TRANSCODE_COMMIT=f8137e68c7b8da88c51aec9563eec9585c10c723
+WORKDIR /src
+
+RUN apk add --no-cache git
+RUN git clone https://github.com/m1k1o/go-transcode.git . \
+    && git checkout "$GO_TRANSCODE_COMMIT"
+
+COPY patches/go-transcode-vaapi.patch /tmp/go-transcode-vaapi.patch
+RUN git apply /tmp/go-transcode-vaapi.patch \
+    && CGO_ENABLED=0 go build -o /go-transcode .
+
+# Keep Alpine 3.17: upstream documents an FFmpeg 6 segmenting regression with
+# newer Alpine releases. Install both Intel and Mesa VAAPI drivers so this also
+# works if the Unraid host exposes an AMD render device.
+FROM alpine:3.17
+WORKDIR /app
+
+RUN echo "https://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories \
+    && apk add --no-cache \
+        bash \
+        ffmpeg \
+        intel-media-driver \
+        libva-intel-driver \
+        libva-utils \
+        mesa-va-gallium
+
+COPY --from=builder /go-transcode /app/go-transcode
+
+EXPOSE 8080
+ENV TRANSCODE_BIND=:8080 \
+    TRANSCODE_VAAPI_DEVICE=/dev/dri/renderD128
+
+ENTRYPOINT ["/app/go-transcode"]
+CMD ["serve"]

config.example.yaml

@@ -1,33 +1,27 @@
-# go-transcode configuration for VAAPI hardware encoding
-# Copy this to go-transcode/config.yaml and adjust as needed
+# go-transcode VOD configuration. Hardware encoding is enabled by the
+# TRANSCODE_VAAPI_DEVICE environment variable in docker-compose.yml.
 
 vod:
   media-dir: /media
   transcode-dir: /tmp/go-transcode
-  # Cache transcoded segments
   cache: true
+  cache-dir: /cache
+  video-keyframes: true
+  video-profiles:
+    480p:
+      width: 854
+      height: 480
+      bitrate: 1200
 
-profiles:
-  480p:
-    height: 480
-    videoBitrate: 1500k
-    audioBitrate: 128k
-    hwaccel: vaapi
-    vaapi-device: /dev/dri/renderD128
-    codec: h264_vaapi
+    720p:
+      width: 1280
+      height: 720
+      bitrate: 3000
 
-  720p:
-    height: 720
-    videoBitrate: 3000k
-    audioBitrate: 192k
-    hwaccel: vaapi
-    vaapi-device: /dev/dri/renderD128
-    codec: h264_vaapi
+    1080p:
+      width: 1920
+      height: 1080
+      bitrate: 6000
 
-  1080p:
-    height: 1080
-    videoBitrate: 6000k
-    audioBitrate: 256k
-    hwaccel: vaapi
-    vaapi-device: /dev/dri/renderD128
-    codec: h264_vaapi
+  audio-profile:
+    bitrate: 192

docker-compose.yml

@@ -14,9 +14,12 @@ services:
 
   transcode:
     build:
-      context: https://github.com/m1k1o/go-transcode.git
+      context: .
+      dockerfile: Dockerfile.transcode
     devices:
       - /dev/dri:/dev/dri
+    environment:
+      - TRANSCODE_VAAPI_DEVICE=/dev/dri/renderD128
     volumes:
       - /mnt/user/plex:/media:ro
       - ./transcode-config.yaml:/app/config.yaml:ro

patches/go-transcode-vaapi.patch

@@ -0,0 +1,63 @@
+diff --git a/hlsvod/transcode.go b/hlsvod/transcode.go
+index 1b04b00..12eb935 100644
+--- a/hlsvod/transcode.go
++++ b/hlsvod/transcode.go
+@@ -6,5 +6,6 @@ import (
+ 	"fmt"
+ 	"log"
++	"os"
+ 	"os/exec"
+ 	"path"
+ 	"strings"
+@@ -56,6 +57,16 @@ func TranscodeSegments(ctx context.Context, ffmpegBinary string, config Transcod
+ 		}...)
+ 	}
+ 
++	// Decode and filter on the GPU when a VAAPI render device is configured.
++	// This is opt-in so upstream's software behavior remains available.
++	vaapiDevice := os.Getenv("TRANSCODE_VAAPI_DEVICE")
++	if vaapiDevice != "" {
++		args = append(args, []string{
++			"-init_hw_device", "vaapi=va:" + vaapiDevice,
++			"-filter_hw_device", "va", "-hwaccel", "vaapi", "-hwaccel_output_format", "vaapi",
++		}...)
++	}
++
+ 	// Input specs
+ 	args = append(args, []string{
+ 		"-i", config.InputFilePath, // Input file
+@@ -79,17 +89,26 @@ func TranscodeSegments(ctx context.Context, ffmpegBinary string, config Transcod
+ 		if profile.Width >= profile.Height {
+ 			scale = fmt.Sprintf("scale=-2:%d", profile.Height)
+ 		} else {
+ 			scale = fmt.Sprintf("scale=%d:-2", profile.Width)
+ 		}
+ 
+-		args = append(args, []string{
+-			"-vf", scale,
+-			"-c:v", "libx264",
+-			"-preset", "faster",
+-			"-profile:v", "high",
+-			"-level:v", "4.0",
+-			"-b:v", fmt.Sprintf("%dk", profile.Bitrate),
+-		}...)
++		if vaapiDevice != "" {
++			if profile.Width >= profile.Height {
++				scale = fmt.Sprintf("scale_vaapi=w=-2:h=%d:format=nv12", profile.Height)
++			} else {
++				scale = fmt.Sprintf("scale_vaapi=w=%d:h=-2:format=nv12", profile.Width)
++			}
++			args = append(args, []string{
++				"-vf", scale, "-c:v", "h264_vaapi", "-profile:v", "high",
++				"-level:v", "4.0", "-b:v", fmt.Sprintf("%dk", profile.Bitrate),
++			}...)
++		} else {
++			args = append(args, []string{
++				"-vf", scale, "-c:v", "libx264", "-preset", "faster",
++				"-profile:v", "high", "-level:v", "4.0",
++				"-b:v", fmt.Sprintf("%dk", profile.Bitrate),
++			}...)
++		}
+ 	}
+ 
+ 	// Audio specs