[Config Support]: Is ffmpeg display_rotation supported

[HomeAssistantPim]

Describe the problem you are having

Thanx for frigate :)
I managed to rotate my camera using go2rtc and ffmpeg's rotate argument.
As I run frigate on my HAOS and my hardware is not that fantastic, I was wondering whether the ffmpeg display_rotation argument is supported as well (only rewrites meta data, no transcoding)?
I tried but it didn't work (or I didn't do it properly)

Version

0.14

Frigate config file

mqtt:
  enabled: false
#  host: 192.168.0.14

database:
  path: /config/frigate.db

go2rtc:
  streams:
    hal:
      - rtsp://.../Preview_01_sub
      - ffmpeg:hal#video=h264
    hal_rotated:
      - ffmpeg:hal#video=h264#rotate=270
    hal_hq:
      - rtsp://.../Preview_01_main
      - ffmpeg:hal_hq#video=h264
    hal_hq_rotated:
      - ffmpeg:hal_hq#video=h264#rotate=270

cameras:
  hal:
    enabled: true
    ffmpeg:
      inputs:
        - path: rtsp://127.0.0.1:8554/hal_hq_rotated
          input_args: preset-rtsp-restream
          roles:
            - record
        - path: rtsp://127.0.0.1:8554/hal_rotated
          input_args: preset-rtsp-restream
          roles:
            - detect

      output_args:
        record: -f segment -segment_time 15 -segment_format mp4 -reset_timestamps
          1 -strftime 1 -c copy -an

    motion:
      mask: 0.736,0.595,0.605,0.593,0.594,0.677,0.726,0.679
record:
  enabled: true
  retain:
    days: 2
    mode: all
  events:
    retain:
      default: 30
      mode: motion
version: 0.14

Relevant Frigate log output

none

Relevant go2rtc log output

none

Frigate stats

No response

Operating system

HassOS

Install method

HassOS Addon

docker-compose file or Docker CLI command

hacs managed

Object Detector

CPU (no coral)

Screenshots of the Frigate UI's System metrics pages

No response

Any other information that may be helpful

No response

[NickM-27]

Display rotation changes the bitstream data which will affect how it is displayed in a player. But this won't be supported for running object detection on the decoded frame because the frame is decoded directly.

[HomeAssistantPim]

Hi Nick,
So I would like my main stream not to be decoded (4K stream), just rotated for live view and recording.
While for detection I would like to use the sub stream (640x380 or so) decoded and rotated.
Could it be done?

[NickM-27]

it would likely be possible for recordings but not live view because I don't think browsers can read the rotation metadata

[HomeAssistantPim]

ok thnx, I guess I just have to keep the video quality low then or get a more powerfull pi to run frigate