FEAT: Support for ffmpeg presets

[NickM-27]

Implementation of #3429

I decided to go with a preset for each ffmpeg arg separately as having a separate preset field presented a few problems.

1. There would either be a low number of presets and customization (picking and choosing what to support) would be low, or there would be an incredible amount of variations. Per camera there would need to be an option for specific types of cameras * rtsp / other protocols * tcp / udp * default / with audio
2. The override behavior would also be difficult to handle, if a user sets preset but then also sets other fields as well.

To-Do:

• Convert the preset args from a string to a list to avoid converting them
• Potentially add more test cases
• Likely need to add presets for the other cuvid decoders
• Refine docs especially around cuvid

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[felipecrs]

Wow. This really looks good. I think you forgot to update this page maybe: https://docs.frigate.video/configuration/index

[blakeblackshear]

Just a nitpick. Otherwise looks great.

[NickM-27]

Wow. This really looks good. I think you forgot to update this page maybe: https://docs.frigate.video/configuration/index

Thank you! I want to leave that page the same, it isn't meant to be copied and it is a good reference for what the default args actually are.

[roger-]

This looks useful. Will it be possible to define presets in the yaml as well?

[felipecrs]

This looks useful. Will it be possible to define presets in the yaml as well?

That's a great idea! I'd suggest you open a separate issue/feature request for it.

[NickM-27]

This looks useful. Will it be possible to define presets in the yaml as well?

Not in this iteration, maybe in the future.

[felipecrs]

I just realized that FFmpeg have built-in support for presets, through files: https://ffmpeg.org/ffmpeg.html#Preset-files

Perhaps we should have taken that route instead. =/

[NickM-27]

I just realized that FFmpeg have built-in support for presets, through files: https://ffmpeg.org/ffmpeg.html#Preset-files

Perhaps we should have taken that route instead. =/

It would be difficult to do the custom fps args for mjpeg and other cases like that

[felipecrs]

That's true. :)