added a configuration option to select the dri node in transcoding (#6376)

* added a configuration option to select the dri node in transcoding

* chore: open api

* refactor: get hawrdware device

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

server/src/domain/media/media.util.ts

@@ -285,6 +285,20 @@ export class BaseHWConfig extends BaseConfig implements VideoCodecHWConfig {
     }
     return this.config.gopSize;
   }
+
+  getPreferredHardwareDevice(): string | null {
+    const device = this.config.preferredHwDevice;
+    if (device === 'auto') {
+      return null;
+    }
+
+    const deviceName = device.replace('/dev/dri/', '');
+    if (!this.devices.includes(deviceName)) {
+      throw new Error(`Device '${device}' does not exist`);
+    }
+
+    return device;
+  }
 }
 
 export class ThumbnailConfig extends BaseConfig {
@@ -463,7 +477,14 @@ export class QSVConfig extends BaseHWConfig {
     if (!this.devices.length) {
       throw Error('No QSV device found');
     }
-    return ['-init_hw_device qsv=hw', '-filter_hw_device hw'];
+
+    let qsvString = '';
+    const hwDevice = this.getPreferredHardwareDevice();
+    if (hwDevice !== null) {
+      qsvString = `,child_device=${hwDevice}`;
+    }
+
+    return [`-init_hw_device qsv=hw${qsvString}`, '-filter_hw_device hw'];
   }
 
   getBaseOutputOptions(videoStream: VideoStreamInfo, audioStream?: AudioStreamInfo) {
@@ -527,9 +548,15 @@ export class QSVConfig extends BaseHWConfig {
 export class VAAPIConfig extends BaseHWConfig {
   getBaseInputOptions() {
     if (this.devices.length === 0) {
-      throw Error('No VAAPI device found');
+      throw new Error('No VAAPI device found');
     }
-    return [`-init_hw_device vaapi=accel:/dev/dri/${this.devices[0]}`, '-filter_hw_device accel'];
+
+    let hwDevice = this.getPreferredHardwareDevice();
+    if (hwDevice === null) {
+      hwDevice = `/dev/dri/${this.devices[0]}`;
+    }
+
+    return [`-init_hw_device vaapi=accel:${hwDevice}`, '-filter_hw_device accel'];
   }
 
   getFilterOptions(videoStream: VideoStreamInfo) {