[Config Support]: Aspect ratio 16:9 / 4:3 with go2rtc

[zewol95]

Describe the problem you are having

Good morning everyone,
I have implemented go2rtc in my setup.

However, I noticed that on the main page the aspect ratio is 4:3, but sometimes it changes to 16:9.
If I enter the camera view (still in Frigate), the aspect ratio is 4:3.
On the recordings/timeline page, it is 16:9 and the videos are recorded in 16:9.

Is there a way to force go2rtc to always use 16:9?
I tried adding #width=1920#height=1080 in the ffmpeg configuration, but without success.

(I’ve read that there are some previous posts about this, but I don’t know if anything has changed over time or with the latest versions of Frigate.)

Thankyou!

Version

version: 0.16-0

Frigate config file

version: 0.16-0

logger:
#  default: debug
  logs:
    frigate.record.maintainer: debug

mqtt:
  enabled: true
  host: 192.168.10.10
  port: 1883
  user: mqtt_user
  password: xxx
  topic_prefix: frigate
  client_id: frigate_client

ffmpeg:
  hwaccel_args: preset-vaapi

record:
  sync_recordings: true
  enabled: true
  retain:
    days: 3
    mode: all
  alerts:
    retain:
      days: 30
      mode: motion
  detections:
    retain:
      days: 30
      mode: motion

go2rtc:
  streams:
    esterno:
      - ffmpeg:rtsp://xxx:[email protected]:554/profile1#video=h264#hardware#width=1920#height=1080
  log:
    exec: trace

cameras:
  esterno:
    enabled: true
    ffmpeg:
      inputs:
        - path: rtsp://127.0.0.1:8554/esterno?video=h264
          input_args: preset-rtsp-restream
          roles:
            - record
            - detect

    detect:
      enabled: true
      width: 1920
      height: 1080
    objects:
      track:
        - person
    zones:
      area_perimetro_interno:  # Definizione della zona personalizzata.
        coordinates: 
          0.756,0.243,0.936,0.458,1,0.547,1,0.599,0.879,0.999,0.393,1,0.398,0.626,0.469,0.62,0.484,0.326,0.526,0.311,0.527,0.265,0.668,0.272,0.742,0.344
        # Coordinate del poligono che definisce la zona `area_perimetro_interno`.
        # Gli oggetti rilevati dentro questa zona possono essere distinti nei log e nelle notifiche.
        inertia: 3
        loitering_time: 0
      area_letizia:
        coordinates: 
          0,1,0,0.076,0.053,0.068,0.056,0.192,0.14,0.176,0.14,0.27,0.337,0.259,0.325,0.312,0.318,0.582,0.276,0.599,0.22,0.592,0.184,0.703,0.103,1
        loitering_time: 0
        inertia: 3
      area_esterna_comune:
        coordinates: 
          0.438,0.11,0.687,0.09,0.898,0.179,0.94,0.198,0.995,0.241,1,0.531,0.791,0.282,0.695,0.168,0.676,0.188,0.666,0.259,0.529,0.251,0.533,0.14,0.384,0.137,0.339,0.246,0.147,0.258,0.143,0.169

        inertia: 3
        loitering_time: 0
    review:
      detections:
        required_zones: area_perimetro_interno
    motion:
      mask:
        - 0.953,0.055,0.955,0.017,0.705,0.015,0.707,0.062
        - 0.065,0.001,0.066,0.173,0.537,0.084,0.54,0.001
        - 0.994,0.005,0.995,0.223,0.893,0.157,0.684,0.077,0.539,0.082,0.542,0.001
        - 0.385,0.146,0.529,0.156,0.523,0.303,0.475,0.317,0.463,0.613,0.394,0.617,0.376,0.999,0.114,0.985,0.224,0.604,0.276,0.61,0.33,0.588,0.329,0.322
snapshots:
  enabled: true  # Abilita il salvataggio degli snapshot.
  timestamp: false  # Disabilita l'inserimento di data e ora sugli snapshot.
  clean_copy: false
  bounding_box: true  # Mostra il riquadro attorno agli oggetti rilevati sugli snapshot.
  retain:
    default: 30  # Mantieni tutti gli snapshot per 30 giorni.
  # Nessun parametro `required_zones`, quindi Frigate salva snapshot per tutti gli oggetti rilevati nell'intero campo visivo.
  required_zones:
    - area_perimetro_interno  # Salva snapshot solo per oggetti rilevati in questa zona.

Relevant Frigate log output

debug | 2025-08-27 17:19:01 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/18.47.mp4 in 0.05064892768859863 seconds.
debug | 2025-08-27 17:19:11 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/18.57.mp4 in 0.046556949615478516 seconds.
debug | 2025-08-27 17:19:21 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/19.07.mp4 in 0.05060291290283203 seconds.
debug | 2025-08-27 17:19:31 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/19.17.mp4 in 0.04489302635192871 seconds.
debug | 2025-08-27 17:19:41 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/19.27.mp4 in 0.04683089256286621 seconds.
debug | 2025-08-27 17:19:51 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/19.37.mp4 in 0.046766042709350586 seconds.
debug | 2025-08-27 17:20:01 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/19.47.mp4 in 0.046852827072143555 seconds.
debug | 2025-08-27 17:20:11 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/19.57.mp4 in 0.04310011863708496 seconds.
debug | 2025-08-27 17:20:21 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/20.07.mp4 in 0.0475919246673584 seconds.
debug | 2025-08-27 17:20:31 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/20.17.mp4 in 0.04348111152648926 seconds.
debug | 2025-08-27 17:20:41 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/20.27.mp4 in 0.04651808738708496 seconds.
debug | 2025-08-27 17:20:51 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/20.37.mp4 in 0.0471959114074707 seconds.
debug | 2025-08-27 17:21:01 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/20.47.mp4 in 0.04713010787963867 seconds.
debug | 2025-08-27 17:21:11 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/20.57.mp4 in 0.043906211853027344 seconds.
debug | 2025-08-27 17:21:21 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/21.07.mp4 in 0.04790210723876953 seconds.
debug | 2025-08-27 17:21:31 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/21.17.mp4 in 0.04568004608154297 seconds.
debug | 2025-08-27 17:21:41 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/21.27.mp4 in 0.04713702201843262 seconds.
debug | 2025-08-27 17:21:51 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/21.37.mp4 in 0.0456390380859375 seconds.
debug | 2025-08-27 17:22:01 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/21.47.mp4 in 0.05103707313537598 seconds.
debug | 2025-08-27 17:22:11 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/21.57.mp4 in 0.04489588737487793 seconds.
debug | 2025-08-27 17:22:21 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/22.07.mp4 in 0.04979395866394043 seconds.
debug | 2025-08-27 17:22:31 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/22.17.mp4 in 0.04584312438964844 seconds.
debug | 2025-08-27 17:22:41 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/22.27.mp4 in 0.04994511604309082 seconds.
debug | 2025-08-27 17:22:51 | frigate.record.maintainer | Copied /media/frigate/recordings/2025-08-27/17/esterno/22.37.mp4 in 0.04732203483581543 seconds.

Relevant go2rtc log output

info | 2025-08-27 17:21:49 | startup | 
info | 2025-08-27 17:21:49 | exec    | SEI type 32 size 46 truncated at 13
info | 2025-08-27 17:21:57 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 184 truncated at 15
info | 2025-08-27 17:21:57 | exec    | [h264 @ 0x587a39b00ac0] SEI type 32 size 184 truncated at 13
info | 2025-08-27 17:22:01 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 19 truncated at 15
info | 2025-08-27 17:22:01 | exec    | [h264 @ 0x587a39b00ac0] SEI type 32 size 19 truncated at 13
info | 2025-08-27 17:22:05 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 237 truncated at 15
info | 2025-08-27 17:22:05 | startup | SEI type 32 size 237 truncated at 13
info | 2025-08-27 17:22:09 | exec    | [h264 @ 0x587a39bfb640] SEI type 35 size 176 truncated at 9
info | 2025-08-27 17:22:09 | exec    | [h264 @ 0x587a39b00ac0] SEI type 35 size 176 truncated at 7
info | 2025-08-27 17:22:13 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 84 truncated at 15
info | 2025-08-27 17:22:13 | exec    | [h264 @ 0x587a39b00ac0] SEI type 32 size 84 truncated at 13
info | 2025-08-27 17:22:17 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 65 truncated at 15
info | 2025-08-27 17:22:17 | exec    | [h264 @ 0x587a39b00ac0] SEI type 32 size 65 truncated at 13
info | 2025-08-27 17:22:21 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 21 truncated at 15
info | 2025-08-27 17:22:21 | exec    | [h264 @ 0x587a39b00ac0] SEI type 32 size 21 truncated at 13
info | 2025-08-27 17:22:25 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 24 truncated at 15
info | 2025-08-27 17:22:25 | startup | SEI type 32 size 24 truncated at 13
info | 2025-08-27 17:22:29 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 69 truncated at 15
info | 2025-08-27 17:22:29 | exec    | [h264 @ 0x587a39b00ac0] SEI type 32 size 69 truncated at 13
info | 2025-08-27 17:22:33 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 120 truncated at 15
info | 2025-08-27 17:22:33 | exec    | [h264 @ 0x587a39b00ac0] SEI type 32 size 120 truncated at 13
info | 2025-08-27 17:22:37 | exec    | [h264 @ 0x587a39bfb640] SEI type 32 size 107 truncated at 15
info | 2025-08-27 17:22:37 | exec    | [h264 @ 0x587a39b00ac0] SEI type 32 size 107 truncated at 13

Frigate stats

No response

Operating system

Debian

Install method

Docker

docker-compose file or Docker CLI command

version: "3.9"
services:
  frigate:
    container_name: frigate
    privileged: true # this may not be necessary for all setups
    restart: unless-stopped
    image: ghcr.io/blakeblackshear/frigate:stable
    network_mode: bridge
    shm_size: 512mb # update for your cameras based on calculation above
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - config:/config
      - /mnt/data/surveillance_file/frigate:/media/frigate

    ports:
      - "5000:5000"
      - "8554:8554" # RTSP feeds
      - "8555:8555/tcp" # WebRTC over tcp
      - "8555:8555/udp" # WebRTC over udp
    environment:
      FRIGATE_RTSP_PASSWORD: "xxx"
    
volumes:
  config:

Object Detector

Coral

Screenshots of the Frigate UI's System metrics pages

Any other information that may be helpful

No response

[inkeep-ai-assistant[bot]]

There is no way to directly force go2rtc or Frigate to always display a specific aspect ratio (such as 16:9) in the Live UI. The aspect ratio used in the Frigate web UI is determined by the stream resolution and client/browser handling, not by a Frigate config parameter. Attempting to set #width=1920#height=1080 in the go2rtc stream URL does not guarantee the displayed aspect ratio in the UI(1)(2).

From available discussion, Frigate may intelligently select between MSE and WebRTC streams for live view, and certain browsers (like Chrome) may display 4:3 while others (like Firefox or Safari with WebRTC) show 16:9(3). There is currently no setting to strictly enforce which protocol or aspect ratio the UI will use, and the selection is not user-configurable within Frigate(3). Video recordings will use the resolution/aspect ratio of the source stream as configured in your ffmpeg input and detect/record settings, but live view may vary(2)(4).

If you want to ensure a consistent aspect ratio, make sure your camera stream itself is always 16:9 and that all Frigate detect, record, and go2rtc input resolutions match (e.g., 1920x1080 everywhere). However, the UI may still display differently depending on browser quirks and Frigate's internal stream selection logic(2)(3).

Check out these potentially useful sources:

• Live View
• Configuring go2rtc
• [Support]: Live view aspect ratio different than original camera stream

Would you like a general answer about video aspect ratios in streaming applications instead?

📚 Sources:

1. Configuring go2rtc
2. Live View
3. [Support]: Live view aspect ratio different than original camera stream
4. Full Reference Config

---

Have another question? Just tag @inkeep.

[hawkeye217]

What browser are you using?

[zewol95]

Chome latest version

[hawkeye217]

What happens if you try another browser like Firefox or Safari that is non-Chromium based?

[Cold-Lemonade]

I've always thought the issue is that the aspect ratios of my cameras' detect streams differ from those of my cameras' go2rtc streams. For example, I have Dahua clones with detect streams at 704x480 and go2rtc streams (which I restream to record) at 2688x1520. The main page of Frigate's GUI shows the detect stream and I believe updates it once per minute unless it detects motion in which case it switches to record stream which I've defined in go2rtc.

But you're using the same stream for both so I am baffled and perhaps my conjecture is wrong.

[chlorophyceae]

I had this issue before, I am using imou ranger s2 camera. I solved it using SmartPSS software from dahua website, and changed the sub-stream camera encoding to NHD(16:9), it was VGA (4:3)