[Support]: Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':

[paterson37]

Describe the problem you are having

Hi,

At the top of every hours I seem to get the error

Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':!

I installed the add-on on Home Assistant. I'm running a Raspberry Pi 5 8GB using Home Assistant OS.

Version

0.16.0-c2f8de9

What browser(s) are you using?

Google Chrome Version 139.0.7258.139 (Official Build) (64-bit)

Frigate config file

mqtt:
  host: core-mosquitto
  user: mqtt_user
  password: ***

detectors:
  coral:
    type: edgetpu
    device: usb

logger:
  default: info

go2rtc:
  streams:
    reolink_main: rtsp://admin:***@***:554/h264Preview_01_main
    reolink_sub: rtsp://admin:***@***:554/h264Preview_01_sub

ffmpeg:
  hwaccel_args: preset-rpi-64-h264

cameras:
  reolink_doorbell:
    ffmpeg:
      inputs:
        - path: rtsp://localhost:8554/reolink_sub
          roles:
            - detect
        - path: rtsp://localhost:8554/reolink_main
          roles:
            - record
            - audio
    detect:
      width: 480
      height: 640
      fps: 5
    record:
      enabled: true
      retain:
        days: 2
    snapshots:
      enabled: true
      timestamp: true
      bounding_box: true
      retain:
        default: 7
    motion:
      threshold: 40
      contour_area: 10
      improve_contrast: true
    objects:
      track:
        - person
        - package
      filters:
        person:
          min_area: 1200
          max_area: 100000
          threshold: 0.7

birdseye:
  enabled: false
version: 0.16-0
detect:
  enabled: true

Relevant Frigate log output

2025-08-24 01:00:53.757605811  [2025-08-24 02:00:53] ffmpeg.reolink_doorbell.audio_record ERROR   : [rtsp @ 0x5587b9a9a0] method DESCRIBE failed: 404 Not Found
2025-08-24 01:00:53.758220311  [2025-08-24 02:00:53] ffmpeg.reolink_doorbell.audio_record ERROR   : rtsp://localhost:8554/reolink_main: Server returned 404 Not Found
2025-08-24 01:00:53.758822848  [2025-08-24 02:00:53] watchdog.reolink_doorbell      INFO    : Terminating the existing ffmpeg process...
2025-08-24 01:00:53.759381422  [2025-08-24 02:00:53] watchdog.reolink_doorbell      INFO    : Waiting for ffmpeg to exit gracefully...
2025-08-24 01:00:54.440397715  [2025-08-24 02:00:54] frigate.video                  ERROR   : reolink_doorbell: Unable to read frames from ffmpeg process.
2025-08-24 01:00:54.440877456  [2025-08-24 02:00:54] frigate.video                  ERROR   : reolink_doorbell: ffmpeg process is not running. exiting capture thread...
2025-08-24 01:01:03.760758509  [2025-08-24 02:01:03] watchdog.reolink_doorbell      ERROR   : Ffmpeg process crashed unexpectedly for reolink_doorbell.
2025-08-24 01:01:03.761429990  [2025-08-24 02:01:03] watchdog.reolink_doorbell      ERROR   : The following ffmpeg logs include the last 100 lines prior to exit.
2025-08-24 01:01:03.761773823  [2025-08-24 02:01:03] ffmpeg.reolink_doorbell.detect ERROR   : [rtsp @ 0x558dd18970] method DESCRIBE failed: 404 Not Found
2025-08-24 01:01:03.762558712  [2025-08-24 02:01:03] ffmpeg.reolink_doorbell.detect ERROR   : rtsp://localhost:8554/reolink_sub: Server returned 404 Not Found
2025-08-24 01:01:03.763851564  [2025-08-24 02:01:03] watchdog.reolink_doorbell      INFO    : Restarting ffmpeg...
2025-08-24 01:01:03.765769120  [2025-08-24 02:01:03] ffmpeg.reolink_doorbell.audio_record ERROR   : [rtsp @ 0x55aeb169a0] method DESCRIBE failed: 404 Not Found
2025-08-24 01:01:03.766847583  [2025-08-24 02:01:03] ffmpeg.reolink_doorbell.audio_record ERROR   : rtsp://localhost:8554/reolink_main: Server returned 404 Not Found
2025-08-24 01:01:03.768007545  [2025-08-24 02:01:03] watchdog.reolink_doorbell      INFO    : Terminating the existing ffmpeg process...
2025-08-24 01:01:03.768012879  [2025-08-24 02:01:03] watchdog.reolink_doorbell      INFO    : Waiting for ffmpeg to exit gracefully...
2025-08-24 02:00:00.498883600  [2025-08-24 03:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 02:00:00.498888970    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 02:00:00.498891248    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 02:00:00.498893489  /media/frigate/clips/previews/reolink_doorbell/1755997200.120576-1756000800.041373.mp4: No such file or directory
2025-08-24 19:56:31.033947  2025-08-24 02:00:00.498894340
2025-08-24 03:00:00.566262780  [2025-08-24 04:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 03:00:00.566268039    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 03:00:00.566270298    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 03:00:00.566272465  /media/frigate/clips/previews/reolink_doorbell/1756000800.041373-1756004400.071954.mp4: No such file or directory
2025-08-24 19:56:31.033956  2025-08-24 03:00:00.566273335
2025-08-24 04:00:00.515371123  [2025-08-24 05:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 04:00:00.515376845    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 04:00:00.515379160    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 04:00:00.515381419  /media/frigate/clips/previews/reolink_doorbell/1756004400.071954-1756008000.099374.mp4: No such file or directory
2025-08-24 19:56:31.033964  2025-08-24 04:00:00.515382327
2025-08-24 05:00:00.613824394  [2025-08-24 06:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 05:00:00.613830172    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 05:00:00.613832487    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 05:00:00.613834709  /media/frigate/clips/previews/reolink_doorbell/1756008000.099374-1756011600.14847.mp4: No such file or directory
2025-08-24 19:56:31.033973  2025-08-24 05:00:00.613835561
2025-08-24 06:00:00.578981107  [2025-08-24 07:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 06:00:00.578986737    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 06:00:00.578989088    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 06:00:00.578991274  /media/frigate/clips/previews/reolink_doorbell/1756011600.14847-1756015200.03045.mp4: No such file or directory
2025-08-24 19:56:31.033982  2025-08-24 06:00:00.578992125
2025-08-24 07:00:00.543418180  [2025-08-24 08:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 07:00:00.543423940    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 07:00:00.543426310    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 07:00:00.543428532  /media/frigate/clips/previews/reolink_doorbell/1756015200.03045-1756018800.079108.mp4: No such file or directory
2025-08-24 19:56:31.033990  2025-08-24 07:00:00.543429384
2025-08-24 08:00:00.493029602  [2025-08-24 09:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 08:00:00.493035195    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 08:00:00.493037528    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 08:00:00.493039787  /media/frigate/clips/previews/reolink_doorbell/1756018800.079108-1756022400.107603.mp4: No such file or directory
2025-08-24 19:56:31.033998  2025-08-24 08:00:00.493040639
2025-08-24 09:00:00.567825319  [2025-08-24 10:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 09:00:00.567831059    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 09:00:00.567833393    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 09:00:00.567835634  /media/frigate/clips/previews/reolink_doorbell/1756022400.107603-1756026000.215472.mp4: No such file or directory
2025-08-24 19:56:31.034007  2025-08-24 09:00:00.567836522
2025-08-24 10:00:00.349954628  [2025-08-24 11:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 10:00:00.349960350    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 10:00:00.349962720    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 10:00:00.349964998  /media/frigate/clips/previews/reolink_doorbell/1756026000.215472-1756029600.019259.mp4: No such file or directory
2025-08-24 19:56:31.034015  2025-08-24 10:00:00.349965905
2025-08-24 11:00:00.441787352  [2025-08-24 12:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 11:00:00.441792574    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 11:00:00.441794908    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 11:00:00.441797185  /media/frigate/clips/previews/reolink_doorbell/1756029600.019259-1756033200.079941.mp4: No such file or directory
2025-08-24 19:56:31.034023  2025-08-24 11:00:00.441798093
2025-08-24 12:00:00.611151602  [2025-08-24 13:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 12:00:00.611157380    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 12:00:00.611159732    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 12:00:00.611161991  /media/frigate/clips/previews/reolink_doorbell/1756033200.079941-1756036800.016406.mp4: No such file or directory
2025-08-24 19:56:31.034032  2025-08-24 12:00:00.611162898
2025-08-24 13:00:00.514380342  [2025-08-24 14:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 13:00:00.514386361    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 13:00:00.514388731    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 13:00:00.514416953  /media/frigate/clips/previews/reolink_doorbell/1756036800.016406-1756040400.097012.mp4: No such file or directory
2025-08-24 19:56:31.034040  2025-08-24 13:00:00.514418009
2025-08-24 14:00:00.498551019  [2025-08-24 15:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 14:00:00.498556926    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 14:00:00.498559204    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 14:00:00.498561408  /media/frigate/clips/previews/reolink_doorbell/1756040400.097012-1756044000.090713.mp4: No such file or directory
2025-08-24 19:56:31.034048  2025-08-24 14:00:00.498562278
2025-08-24 15:00:00.451025998  [2025-08-24 16:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 15:00:00.451031442    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 15:00:00.451033886    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 15:00:00.451036109  /media/frigate/clips/previews/reolink_doorbell/1756044000.090713-1756047600.057097.mp4: No such file or directory
2025-08-24 19:56:31.034057  2025-08-24 15:00:00.451036998
2025-08-24 16:00:00.481714528  [2025-08-24 17:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 16:00:00.481720399    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 16:00:00.481722788    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 16:00:00.481725010  /media/frigate/clips/previews/reolink_doorbell/1756047600.057097-1756051200.065392.mp4: No such file or directory
2025-08-24 19:56:31.034065  2025-08-24 16:00:00.481725973
2025-08-24 17:00:00.550741722  [2025-08-24 18:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 17:00:00.550747796    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 17:00:00.550750259    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 17:00:00.550752593  /media/frigate/clips/previews/reolink_doorbell/1756051200.065392-1756054800.16478.mp4: No such file or directory
2025-08-24 19:56:31.034074  2025-08-24 17:00:00.550753518
2025-08-24 18:00:00.471857028  [2025-08-24 19:00:00] frigate.output.preview         ERROR   : Error saving preview for reolink_doorbell :: Input #0, concat, from '/dev/stdin':
2025-08-24 18:00:00.471862750    Duration: N/A, start: 0.000000, bitrate: N/A
2025-08-24 18:00:00.471864991    Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 180x240, 25 fps, 25 tbr, 25 tbn
2025-08-24 18:00:00.471867250  /media/frigate/clips/previews/reolink_doorbell/1756054800.16478-1756058400.182676.mp4: No such file or directory
2025-08-24 19:56:31.034082  2025-08-24 18:00:00.471868083

Relevant go2rtc log output

2025-08-23 06:33:04.757996614  [INFO] Preparing new go2rtc config...
2025-08-23 06:33:04.834555728  [INFO] Got IP address from supervisor: ***
2025-08-23 06:33:04.898276714  [INFO] Got WebRTC port from supervisor: 8555
2025-08-23 06:33:05.590994455  [INFO] Starting go2rtc...
2025-08-23 06:33:05.761119122  07:33:05.760 INF go2rtc platform=linux/arm64 revision=fa580c5 version=1.9.9
2025-08-23 06:33:05.761126752  07:33:05.760 INF config path=/dev/shm/go2rtc.yaml
2025-08-23 06:33:05.761775659  07:33:05.761 INF [rtsp] listen addr=:8554
2025-08-23 06:33:05.762193548  07:33:05.761 INF [api] listen addr=:1984
2025-08-23 06:33:05.762964566  07:33:05.762 INF [webrtc] listen addr=:8555
2025-08-23 06:33:13.310843580  [INFO] Starting go2rtc healthcheck service...
2025-08-24 01:00:01.548765754  02:00:01.548 WRN github.com/AlexxIT/go2rtc/internal/streams/producer.go:170 > error=EOF url=rtsp://admin:***@***:554/h264Preview_01_main
2025-08-24 01:00:01.556070328  02:00:01.555 WRN github.com/AlexxIT/go2rtc/internal/streams/producer.go:170 > error=EOF url=rtsp://admin:***@***:554/h264Preview_01_sub
2025-08-24 01:00:26.947155411  02:00:26.947 WRN [rtsp] error="streams: dial tcp ***:554: i/o timeout" stream=reolink_main
2025-08-24 01:00:36.960949805  02:00:36.960 WRN [rtsp] error="streams: dial tcp ***:554: i/o timeout" stream=reolink_sub
2025-08-24 01:00:36.961193712  02:00:36.960 WRN [rtsp] error="streams: dial tcp ***:554: i/o timeout" stream=reolink_main
2025-08-24 01:00:44.404035275  02:00:44.403 WRN [rtsp] error="streams: wrong response on DESCRIBE" stream=reolink_main
2025-08-24 01:00:44.474355106  02:00:44.474 WRN [rtsp] error="streams: wrong response on DESCRIBE" stream=reolink_sub
2025-08-24 01:00:54.368380329  02:00:54.368 WRN [rtsp] error="streams: wrong response on DESCRIBE" stream=reolink_main
2025-08-24 01:00:54.426008234  02:00:54.425 WRN [rtsp] error="streams: wrong response on DESCRIBE" stream=reolink_sub

FFprobe output from your camera

N/A

Frigate stats

No response

Install method

Home Assistant Add-on

docker-compose file or Docker CLI command

N/A

Object Detector

Coral

Network connection

Wired

Camera make and model

Reolink Video Doorbell WiFi-W (D340W-White)

Screenshots of the Frigate UI's System metrics pages

Any other information that may be helpful

No response

[inkeep-ai-assistant[bot]]

The errors you're seeing—such as “Error saving preview for reolink_doorbell” and repeated 404 Not Found messages for your RTSP streams—indicate that Frigate is unable to access or maintain a connection to your camera streams via go2rtc and ffmpeg at certain times(1)(2). This commonly happens when:

• The RTSP streams (rtsp://localhost:8554/reolink_main and rtsp://localhost:8554/reolink_sub) are not available or go2rtc cannot relay them.
• The camera is overloaded, offline, or there is a network issue between Frigate and the camera.
• There are configuration or copy-paste errors in your go2rtc stream names or paths.

Actions to resolve:

1. Check Camera Connectivity: Make sure your Reolink doorbell is online and that the RTSP URLs work when accessed directly from the Frigate host.
2. Validate go2rtc Streams: In your config, confirm that the names in go2rtc: streams: match exactly with your ffmpeg input paths. For example, if you use reolink_main and reolink_sub in go2rtc, you must reference them as rtsp://localhost:8554/reolink_main and rtsp://localhost:8554/reolink_sub in your ffmpeg inputs(3)(4).
3. Check for Camera Overload: Reolink cameras can refuse connections if they are overloaded by too many simultaneous streams(1).
4. Network/Firewall: Ensure there are no network or firewall issues between Frigate and your camera.
5. Directory Existence: The error /media/frigate/clips/previews/reolink_doorbell/...mp4: No such file or directory means Frigate cannot write the preview file. Check that the /media/frigate/clips/previews/reolink_doorbell/ directory exists and is writable by Frigate.

If after checking the above your streams are still unstable, you may want to reduce the number of concurrent connections to your camera or use the secondary stream for detection and the primary for recording only, as described in the camera-specific configuration(4).

Check out these potentially useful sources: Configuring go2rtc, Camera Specific Configurations, Config Support: Log file full of FFMPEG/Go2rtc Errors

Would you like a general answer based on my knowledge instead?

📚 Sources:

1. [Config Support]: Log file full of FFMPEG/Go2rtc Errors
2. [Support]: getting a Server returned 404 Not Found
3. Configuring go2rtc
4. Camera Specific Configurations

---

Have another question? Just tag @inkeep.

[hawkeye217]

In addition, you should be using the recommended Reolink config for your doorbell: https://docs.frigate.video/configuration/camera_specific/#reolink-doorbell