From 42f230f223589290e8b249eb0b5ac4ead71dc311 Mon Sep 17 00:00:00 2001
From: Copilot <198982749+Copilot@users.noreply.github.com>
Date: Thu, 23 Oct 2025 18:59:12 +0900
Subject: [PATCH] Fix video audio loss during compression by preserving audio
 stream (#16696)

* Initial plan

* Fix video audio loss during compression by specifying AAC codec

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

* Fix audio by avoiding transcoding - copy audio stream directly

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>
---
 packages/frontend/src/composables/use-uploader.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/frontend/src/composables/use-uploader.ts b/packages/frontend/src/composables/use-uploader.ts
index 12b6e85940..e4aa1fda53 100644
--- a/packages/frontend/src/composables/use-uploader.ts
+++ b/packages/frontend/src/composables/use-uploader.ts
@@ -634,7 +634,9 @@ export function useUploader(options: {
 					bitrate: item.compressionLevel === 1 ? mediabunny.QUALITY_VERY_HIGH : item.compressionLevel === 2 ? mediabunny.QUALITY_MEDIUM : mediabunny.QUALITY_VERY_LOW,
 				},
 				audio: {
-					bitrate: item.compressionLevel === 1 ? mediabunny.QUALITY_VERY_HIGH : item.compressionLevel === 2 ? mediabunny.QUALITY_MEDIUM : mediabunny.QUALITY_VERY_LOW,
+					// Explicitly keep audio (don't discard) and copy it if possible
+					// without re-encoding to avoid WebCodecs limitations on iOS Safari
+					discard: false,
 				},
 			});