Videos recorded in portrait gets snapshots distorted for rotation metadata as '-90'

[Hagfjall]

Movies I record on Samsung Galaxy S23 in portrait mode have this metadata (only showing related data):

$ 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.

When I run

FFMpegCore/FFMpegCore/FFMpeg/FFMpeg.cs

Line 45 in 6c2311c

public static async Task<bool> SnapshotAsync(string input, string output, Size? size = null, TimeSpan? captureTime = null, int? streamIndex = null, int inputFileIndex = 0)

with only width as Size (to keep aspect ratio) the result gets distorted.
Reason is most likely due only checking the positive numbers of rotation here:

FFMpegCore/FFMpegCore/FFMpeg/SnapshotArgumentBuilder.cs

Line 67 in 6c2311c

if (source.PrimaryVideoStream.Rotation == 90 || source.PrimaryVideoStream.Rotation == 180)