fix: Snapshots from rotated videos should have correct width/height

[Hagfjall]

Some video-files have their metadata as -90 instead of 90. This PR handles correct aspect-ratio and rotation when taking snapshots.

Example:

$ ffprobe -print_format json -loglevel error  -show_format -sexagesimal -show_streams ./20240330_072509.mp4 | jq '.streams[] | {coded_width, coded_height, side_data_list}'
{
  "coded_width": 1280,
  "coded_height": 720,
  "side_data_list": [
    {
      "side_data_type": "Display Matrix",
      "displaymatrix": "\n00000000:            0       65536           0\n00000001:       -65536           0           0\n00000002:            0           0  1073741824\n",
      "rotation": -90
    }
  ]
}

Note the rotation is -90.

The sample video provided in the PR is my own recording. A bit too big maybe? I couldn't find any command to set the metadata to -90 on existing video. Would be happy to get it working on already existing test-data to reduce size.

Fixes #509

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.24%. Comparing base (f8407bc) to head (fe4b79e).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #510      +/-   ##
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- Coverage   74.31%   71.24%   -3.08%     
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  Files         113      115       +2     
  Lines        2854     2914      +60     
  Branches        0      281     +281     
==========================================
- Hits         2121     2076      -45     
  Misses        733      733              
- Partials        0      105     +105     

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