@src4x src4x

This tag name carries more than one meaning (2)

Source URL of the image at 4x resolution

JSON key
src4x
Format
string
Min / Max
0 - 1
Default value
""
Always emit
No

Used by bits

Source URL of the video at 4x resolution

JSON key
{
  "thumbnails": [
    {
      "src": "$"
    }
  ]
}
Format
string
Min / Max
0 - 1
Default value
""
Always emit
No