How to view performance metrics (upload/render/present times)

mpv Information

mpv v0.38.0-717-g92f052c14e Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on Aug 23 2024 19:03:40
libplacebo version: v7.349.0 (v7.349.0-5-g82bf46ae)
FFmpeg version: N-116756-gcfe0a36352
FFmpeg library versions:
   libavcodec      61.11.100
   libavdevice     61.2.100
   libavfilter     10.2.102
   libavformat     61.5.101
   libavutil       59.34.100
   libswresample   5.2.100
   libswscale      8.2.100

Other Information

- Linux version:UnionTech OS Desktop 20 Pro
- Kernel Version:4.19.0-amd64-desktop
- Mesa/GPU Driver Version: OpenGL version string: 4.1 build 20240905 release db38ca5a4 db38ca5a4@20240905

Reproduction Steps

mpv --hwdec=vaapi --vo=gpu 1920-1080-60.flv --loop
Statistics on decoding time could not be found
What does key_page_0's vo-video-draw and vo-video-time mean

Expected Behavior

performance metrics can be viewed via stats (upload/render/present times)

Actual Behavior

last avg peak always equal to 0

Log File

mpv.log

Sample Files

No response

I carefully read all instruction and confirm that I did the following:

• I tested with the latest mpv version to validate that the issue is not already fixed.
• 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.

Start with mpv's stats output and the key_page_0 values for vo-video-draw and vo-video-time, using the reproduction command and attached log. Determine why the last, average, and peak values remain zero; done means stats expose meaningful upload, render, and present times.