Support main+sub stream exports (#24193)

* Support multi resolution exports

* Fix decoder text

* Add dropdown and ability to select export stream selection

* Fix for review comments

* Fix mypy

* Cleanup wording

frigate/test/test_export_progress.py

@@ -12,7 +12,11 @@ from frigate.jobs.export import (
     ExportJob,
     ExportJobManager,
 )
-from frigate.record.export import PlaybackSourceEnum, RecordingExporter
+from frigate.record.export import (
+    ExportStreamEnum,
+    PlaybackSourceEnum,
+    RecordingExporter,
+)
 from frigate.types import JobStatusTypesEnum
 from frigate.util.ffmpeg import inject_progress_flags
 
@@ -38,7 +42,11 @@ def _make_exporter(
     exporter.ffmpeg_input_args = ffmpeg_input_args
     exporter.ffmpeg_output_args = ffmpeg_output_args
     exporter.cpu_fallback = False
+    exporter.stream = ExportStreamEnum.auto
     exporter.on_progress = on_progress
+    exporter.staged_runs = []
+    exporter.staged_transcode = False
+    exporter._coverage = ([], set(), False)
     return exporter