From 90d11810e3eaa2938459752ec2fdaf0b61395cca Mon Sep 17 00:00:00 2001
From: Romain Vimont <rom@rom1v.com>
Date: Sat, 21 Feb 2026 12:20:55 +0100
Subject: [PATCH] Set MediaCodec KEY_LATENCY to the minimum value

The encoder must output a frame as soon as one frame is queued.

Refs <https://developer.android.com/reference/android/media/MediaFormat#KEY_LATENCY>
Refs #6238 comment <https://github.com/Genymobile/scrcpy/issues/6238#issuecomment-3828402687>
PR #6670 <https://github.com/Genymobile/scrcpy/pull/6670>
---
 .../main/java/com/genymobile/scrcpy/video/SurfaceEncoder.java   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/server/src/main/java/com/genymobile/scrcpy/video/SurfaceEncoder.java b/server/src/main/java/com/genymobile/scrcpy/video/SurfaceEncoder.java
index 39ad273d..0f7e9a21 100644
--- a/server/src/main/java/com/genymobile/scrcpy/video/SurfaceEncoder.java
+++ b/server/src/main/java/com/genymobile/scrcpy/video/SurfaceEncoder.java
@@ -266,6 +266,8 @@ public class SurfaceEncoder implements AsyncProcessor {
         format.setLong(MediaFormat.KEY_REPEAT_PREVIOUS_FRAME_AFTER, REPEAT_FRAME_DELAY_US); // µs
         // real-time priority
         format.setInteger(MediaFormat.KEY_PRIORITY, 0);
+        // output 1 frame as soon as 1 frame is queued
+        format.setInteger(MediaFormat.KEY_LATENCY, 1);
         if (maxFps > 0) {
             // The key existed privately before Android 10:
             // <https://android.googlesource.com/platform/frameworks/base/+/625f0aad9f7a259b6881006ad8710adce57d1384%5E%21/>