@svta/common-media-library
Version:
A common library for media playback in JavaScript
25 lines • 914 B
JavaScript
import { FRAME_RATE_NUMERATOR_30, ZERO, } from '../../../../utils/constants.js';
/**
* @internal
*
* Get the framerate from a track.
*
* If frameRate numerator is not present, it uses 30 as default.
*
* @param track - to get the framerate from
* @returns frame rate as a string formatted as `numerator/denominator`
*/
export function getFrameRate(track) {
var _a;
let frameRate = undefined;
if ((track === null || track === void 0 ? void 0 : track.type) === 'video') {
const videoTrack = track;
frameRate = `${(_a = videoTrack.frameRate.frameRateNumerator) !== null && _a !== void 0 ? _a : FRAME_RATE_NUMERATOR_30}`;
frameRate =
videoTrack.frameRate.frameRateDenominator !== ZERO
? `${frameRate}/${videoTrack.frameRate.frameRateDenominator}`
: frameRate;
}
return frameRate;
}
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