fix(video): allow encoder probing when there are no devices at all

[FrogTheFrog]

Description

It is possible that if there are no devices reported, that the API is not functioning properly. Make sure not to prevent encoding in such cases if we can't tell.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.

Project coverage is 11.62%. Comparing base (24cce3a) to head (835ccb7).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/video.cpp	0.00%	9 Missing ⚠️
src/display_device.cpp	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3594      +/-   ##
==========================================
- Coverage   11.63%   11.62%   -0.01%     
==========================================
  Files          93       93              
  Lines       17314    17318       +4     
  Branches     8086     8091       +5     
==========================================
  Hits         2014     2014              
- Misses      14706    14710       +4     
  Partials      594      594              

Flag	Coverage Δ
Linux	11.30% <0.00%> (-0.01%)	⬇️
Windows	13.04% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/display_device.cpp	54.94% <0.00%> (+0.31%)	⬆️
src/video.cpp	21.73% <0.00%> (-0.13%)	⬇️

[sonarqubecloud]

Quality Gate failed

Failed conditions
2 New issues
2 New Code Smells (required ≤ 0)

See analysis details on SonarQube Cloud

Catch issues before they fail your Quality Gate with our IDE extension SonarQube for IDE