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Add FAQ to explain why streams might work in VLC but not in Frigate (#15513)

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* Add faq to explain why streams might work in VLC but not in Frigate

* fix go2rtc version number

* wording

* mention udp input args and preset
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Josh Hawkins 2024-12-14 13:58:39 -06:00 committed by GitHub
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commit 17f8939f97
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docs/docs/configuration/advanced.md
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@ -174,7 +174,7 @@ NOTE: The folder that is set for the config needs to be the folder that contains
### Custom go2rtc version
Frigate currently includes go2rtc v1.9.4, there may be certain cases where you want to run a different version of go2rtc.
Frigate currently includes go2rtc v1.9.2, there may be certain cases where you want to run a different version of go2rtc.
To do this:

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docs/docs/troubleshooting/faqs.md
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@ -98,3 +98,11 @@ docker run -d \
-p 8555:8555/udp \
ghcr.io/blakeblackshear/frigate:stable
```
### My RTSP stream works fine in VLC, but it does not work when I put the same URL in my Frigate config. Is this a bug?
No. Frigate uses the TCP protocol to connect to your camera's RTSP URL. VLC automatically switches between UDP and TCP depending on network conditions and stream availability. So a stream that works in VLC but not in Frigate is likely due to VLC selecting UDP as the transfer protocol.
TCP ensures that all data packets arrive in the correct order. This is crucial for video recording, decoding, and stream processing, which is why Frigate enforces a TCP connection. UDP is faster but less reliable, as it does not guarantee packet delivery or order, and VLC does not have the same requirements as Frigate.
You can still configure Frigate to use UDP by using ffmpeg input args or the preset `preset-rtsp-udp`. See the [ffmpeg presets](/configuration/ffmpeg_presets) documentation.