Audio glitches and instability W11; scrcpy 4.0

Enviroment:
W11, scrcpy 4.0, android 16, galaxy s25+

On Windows 11 with a Samsung Galaxy S25+, Android 16, I get audio glitches (stuttering/crackling) when using scrcpy 4.0 with both audio and video enabled in a single instance.

The issue persists across different codecs (AAC), buffers, FPS, and bitrates.

However, the problem disappears completely when splitting into two processes:

Video:

scrcpy --no-audio --max-fps=60 --video-bit-rate=6400k --video-codec=h265

Audio:

scrcpy --no-video --audio-source=output --audio-codec=aac --audio-buffer=400 --audio-output-buffer=100

In this split setup, both audio and video are stable. But together they won't work.

Start by reproducing the combined audio-and-video command on Windows 11 with the listed Galaxy S25+ and Android 16, then compare it with the two-process setup in the report. Varying codecs, buffers, FPS, and bitrates has already been tried; done means identifying and fixing the combined-mode stuttering and crackling without regressing either stream.

Written by the indexing model from the issue text.