Add AV1 transcoding support (#8491)

* Add AV1 transcoding support

- AV1 encoding on CPU via SVT-AV1 (libsvtav1 in ffmpeg)
- Supports CRF and optionally capped CRF (max bitrate)
- Tested playback successfully in Chrome Win+Android, Firefox Win+Linux, Android app

* AV1: Add support for encoding threads option

* Revert previous commit; specifying params multiple times is bad

We need to specify all svtav1-params at once, so putting the thread option into getThreadOptions is not possible.

* AV1: Override VAAPI getSupportedCodecs as it does not yet support AV1 unlike nvenc, qsv, amf

* Change BaseHWConfig supported codecs to only H264/HEVC

Configs that support VP9 and/or AV1 need to override getSupportedCodecs()

* Set SVT-AV1 threads with svtav1-params, remove duplicate block in NVENCConfig

* AV1Config: Fix empty svtav1-params array being added to options

* add tests

* update api

* allow crf-based two-pass mode

* formatting

* suggest 35

---------

Co-authored-by: mertalev <101130780+mertalev@users.noreply.github.com>

server/src/services/media.service.ts

@@ -32,6 +32,7 @@ import { IStorageRepository } from 'src/interfaces/storage.interface';
 import { ISystemConfigRepository } from 'src/interfaces/system-config.interface';
 import { ImmichLogger } from 'src/utils/logger';
 import {
+  AV1Config,
   H264Config,
   HEVCConfig,
   NVENCConfig,
@@ -439,6 +440,9 @@ export class MediaService {
       case VideoCodec.VP9: {
         return new VP9Config(config);
       }
+      case VideoCodec.AV1: {
+        return new AV1Config(config);
+      }
       default: {
         throw new UnsupportedMediaTypeException(`Codec '${config.targetVideoCodec}' is unsupported`);
       }