pub unsafe static AVCaptionTimeCodeFrameDurationKey: Option<&'static AVCaptionSettingsKey>Available on crate feature
AVCaptionSettings only.Expand description
Frame duration used for the time code.
Some formats, such as TTML, use time code notation to indicate the timing of a caption. Use the property to specify the frame rate of the time code.
For example, if the time code steps for every 1001 / 30000 seconds, the value should be CMTime(value: 1001, scale: 30000).
See also Apple’s documentation