Add camera support to synology_dsm

[shenxn]

Proposed change

This PR adds camera support to the synology_dsm integration. After this integration, we should deprecated the synology integration since that is no longer needed.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example entry for configuration.yaml:

# Example configuration.yaml

Additional information

• This PR fixes or closes issue: fixes Synology Surveillance Station not providing RTSP stream (for live view, etc.) #29931, fixes Incorrect video resolution from Synology camera integration #36999
• This PR is related to issue: Can't connect to Synology Surveillance Station 6.1 #35475
• Link to documentation pull request: Add camera support to synology_dsm home-assistant.io#14467

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• Untested files have been added to .coveragerc.

The integration reached or maintains the following Integration Quality Scale:

• No score or internal
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• 🏆 Platinum

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[probot-home-assistant]

Hey there @hacf-fr, @Quentame, mind taking a look at this pull request as its been labeled with an integration (synology_dsm) you are listed as a codeowner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[Quentame]

Good job !

[Quentame]

Seems nice to me, will test before approval.

[Quentame]

get snapshot image worked well but live stream got stuck.

http://IP:PORT/webapi/entry.cgi?api=SYNO.SurveillanceStation.Stream.VideoStreaming&version=1&method=Stream&format=mjpeg&cameraId=1&StmKey="a4b710d547bf21275eb59143497fd9db" does not respond.

Investivating...

Almost the same as a synology issue #39813

[shenxn]

@Quentame I think the code uses rtsp streaming instead of the mjpeg one. Can you try the rtsp address?

[Quentame]

@Quentame I think the code uses rtsp streaming instead of the mjpeg one. Can you try the rtsp address?

I will

[Quentame]

Apparently a new version of the frontend fixes this issue, see : #39813 (comment)

So I'll rebase your branch locally and see if this works.

[Quentame]

Working after a rebase

[Quentame]

Good job, thanks a lot 😊

[Quentame]

Emmmm, it was quick 😅

I think we should add some doc @shenxn !

[shenxn]

I created a PR for doc. Now I think it's time to deprecated the synology integration.