fix bug

src/renderer/src/util/duration.test.ts

@@ -45,6 +45,8 @@ it('should format and parse duration with correct rounding', () => {
   expect(formatDuration({ seconds: parseDuration('00:00:00,00', 30), fps: 30 })).toBe('00:00:00.00');
   expect(formatDuration({ seconds: parseDuration('00:00:00,29', 30), fps: 30 })).toBe('00:00:00.29');
   expect(formatDuration({ seconds: parseDuration('01:00:01,01', 30), fps: 30 })).toBe('01:00:01.01');
+  expect(parseDuration('0', 30)).toBe(0);
+  expect(parseDuration('0,1', 30)).toBe(0.03333333333333333);
 });
 
 // https://github.com/mifi/lossless-cut/issues/1603

src/renderer/src/util/duration.ts

@@ -40,7 +40,7 @@ export function formatDuration({ seconds: totalSecondsIn, fileNameFriendly, show
 }
 
 // todo adapt also to frame counts and frame fractions?
-export const isExactDurationMatch = (str) => /^-?\d{2}:\d{2}:\d{2}.\d{3}$/.test(str);
+export const isExactDurationMatch = (str: string) => /^-?\d{2}:\d{2}:\d{2}.\d{3}$/.test(str);
 
 // See also parseYoutube
 export function parseDuration(str: string, fps?: number) {
@@ -60,7 +60,7 @@ export function parseDuration(str: string, fps?: number) {
     sec = parseFloat(secWithFraction);
   } else {
     const [secStr, framesStr] = secWithFraction.split('.');
-    sec = parseInt(secStr!, 10) + parseInt(framesStr!, 10) / fps;
+    sec = parseInt(secStr!, 10) + (framesStr != null ? parseInt(framesStr, 10) : 0) / fps;
   }
 
   if (min > 59) return undefined;