diff --git a/packages/frontend/src/components/MkMediaAudio.vue b/packages/frontend/src/components/MkMediaAudio.vue
index 964a6ff1fa..bfeb60cc1b 100644
--- a/packages/frontend/src/components/MkMediaAudio.vue
+++ b/packages/frontend/src/components/MkMediaAudio.vue
@@ -207,7 +207,8 @@ function init() {
 				isActuallyPlaying.value = false;
 				isPlaying.value = false;
 			});
-
+			
+			durationMs.value = audioEl.value.duration * 1000;
 			audioEl.value.addEventListener('durationchange', () => {
 				if (audioEl.value) {
 					durationMs.value = audioEl.value.duration * 1000;
diff --git a/packages/frontend/src/components/MkMediaVideo.vue b/packages/frontend/src/components/MkMediaVideo.vue
index 0f5fdfedc7..f08114fdd3 100644
--- a/packages/frontend/src/components/MkMediaVideo.vue
+++ b/packages/frontend/src/components/MkMediaVideo.vue
@@ -283,6 +283,7 @@ function init() {
 				isPlaying.value = false;
 			});
 
+			durationMs.value = videoEl.value.duration * 1000;
 			videoEl.value.addEventListener('durationchange', () => {
 				if (videoEl.value) {
 					durationMs.value = videoEl.value.duration * 1000;