fix ivideon source

[egmen]

This config shows error

streams:
  ustusa: ivideon:100-ovO8jrLNOcP2mQQjains3o/0

11:23:17.730 WRN internal/streams/producer.go:171 > error="wrong message type: {\"type\": \"metadata\", \"metadataOffset\": 3998.0, \"metadataPosition\": 1712910198585.0, \"absolute_time\": 1712910198585.0, \"keyframeIndex\": 2.0}" url=ivideon:100-ovO8jrLNOcP2mQQjains3o/0
11:24:31.692 ERR internal/mjpeg/init.go:166 > error="streams: wrong message type: {\"type\": \"metadata\", \"duration\": 3600.0, \"width\": 1920.0, \"height\": 1080.0, \"videodatarate\": 0.0, \"framerate\": 1000.0, \"videocodecid\": 7.0, \"audiodatarate\": 0.0, \"audiosamplerate\": 0.0, \"audiosamplesize\": 0.0, \"stereo\": false, \"audiocodecid\": -16.0, \"audiochannels\": 0.0, \"metadataOffset\": 0.0, \"metadataPosition\": 1712910270562.0, \"speed\": 1.0, \"fragmentPosition\": 1712910270562.0, \"fragmentDuration\": 3600000.0}"

skipping messages with type=metadata fixes stream

[evgenekov]

This fix works fine. Thank you very much.

[AlexxIT]

Thanks!

[AlexxIT]

https://github.com/AlexxIT/go2rtc/releases/tag/v1.9.0