mpv-player / mpv-player/mpv

"Audio device underrun detected" causing dropped frames

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os:win
Dominant language
C
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Description

mpv Information
mpv v0.41.0-dev-g41f6a6450 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
 built on Dec 21 2025 19:30:47
libplacebo version: v7.358.0
FFmpeg version: f853d12
FFmpeg library versions:
   libavcodec      62.11.100
   libavdevice     62.1.100
   libavfilter     11.4.100
   libavformat     62.3.100
   libavutil       60.8.100
   libswresample   6.1.100
   libswscale      9.1.100
Other Information
- Windows version: 10.0.26200.9168
- GPU model, driver and version: integrated graphics AMD Ryzen 7 5800HS
- Source of mpv: GitHub Release
- Latest known working version: N/A
- Issue started after the following happened: N/A
Reproduction Steps

Issue happens even with --no-config --profile=fast --hwdec=yes

It happens with all media files I try to play

Expected Behavior

No frames dropped

Actual Behavior

Frames are dropped and the warning Audio device underrun detected is printed to the terminal

Log File

log.txt

Sample Files

No response

I carefully read all instruction and confirm that I did the following:
  • I tested and confirmed that the issue exists with the latest release version or newer.
  • I provided all required information including system and mpv version.
  • I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of --log-file=output.txt.
  • I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
  • I attached the full, untruncated log file.
  • I attached the backtrace in the case of a crash.

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the attached log.txt and reproducing the issue with --no-config --profile=fast --hwdec=yes on Windows. Confirm the same audio underrun warning and dropped frames across the reported media files; done means playback no longer drops frames or prints that warning.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
audio-video-rtc
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
45/100

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