[thumbnail] temporarily unavailable, "Failed to get caps from capsfilter sink pad"

[joaoantoniocardoso]

Requesting http://blueos.local:6020/thumbnail?source=ball&quality=75&target_height=150, the answer is:

Thumbnail for source "ball" is temporarily unavailable. Try again later. Details: Failed to get caps from capsfilter sink pad

Relevant images:

Stream configuration:

Endpoints:

rtsp://192.168.0.48:8554/video_stream_ball

Configuration:

{
  "id": "6a5391f8-1121-4399-a437-15e181630b93",
  "running": true,
  "video_and_stream": {
    "name": "Stream ball",
    "stream_information": {
      "endpoints": [
        "rtsp://192.168.0.48:8554/video_stream_ball"
      ],
      "configuration": {
        "type": "video",
        "encode": "H264",
        "height": 240,
        "width": 320,
        "frame_interval": {
          "numerator": 1,
          "denominator": 5
        }
      },
      "extended_configuration": {
        "thermal": false
      }
    },
    "video_source": {
      "Gst": {
        "name": "Fake source",
        "source": {
          "Fake": "ball"
        }
      }
    }
  }
}

[joaoantoniocardoso]

I couldn't reproduce it a second time, tried several fps and size configurations.