From 3fcb93712d2adb161efed5d76ea95d2fd2133dee Mon Sep 17 00:00:00 2001
From: Vanilagy <1696106+Vanilagy@users.noreply.github.com>
Date: Wed, 8 Jul 2026 16:50:58 +0200
Subject: [PATCH] @mediabunny/server: Properly force IDR frames when encoding
 AVC/HEVC on NVENC

---
 packages/server/src/video-encoder.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/server/src/video-encoder.ts b/packages/server/src/video-encoder.ts
index ed08d33..a37b4ff 100644
--- a/packages/server/src/video-encoder.ts
+++ b/packages/server/src/video-encoder.ts
@@ -203,6 +203,11 @@ export class NodeAvVideoEncoder extends CustomVideoEncoder {
 			if (isRealtime) {
 				codecContext.setOption('preset', '12');
 			}
+		} else if (this.avCodec.name === 'h264_nvenc') {
+			// When we force a key frame, we want a true IDR frame, not just an I frame
+			codecContext.setOption('forced-idr', '1');
+		} else if (this.avCodec.name === 'hevc_nvenc') {
+			codecContext.setOption('forced-idr', '1');
 		}
 
 		if (this.codec === 'prores') {