Taskbar progress indicator does not appear at the very start of video playback

[raziel711]

mpv Information

mpv v0.38.0-372-g481e4984 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
 built on May 31 2024 12:18:20
libplacebo version: v7.349.0 (v6.338.0-140-g50ddb03-dirty)
FFmpeg version: N-115464-g249c66bb2
FFmpeg library versions:
   libavutil       59.20.100
   libavcodec      61.5.104
   libavformat     61.3.104
   libswscale      8.2.100
   libavfilter     10.2.102
   libswresample   5.2.100

Other Information

• Windows version: Windows 10 22H2
• GPU model, driver and version: NVIDIA GeForce GTX 1650, driver version 555.85
• Source of mpv: https://github.com/zhongfly/mpv-winbuild/releases
• Introduced in version: N/A

Reproduction Steps

When using taskbar-progress, the taskbar progress indicator does not appear at the very start of video playback. For example, when using a video with a duration of 23:41 played with mpv --no-config, at six seconds the progress indicator is not visible on the taskbar:

It only appears starting at seven seconds:

For reference, this is at the six second mark with MPC-HC; the indicator shows up from the start of the video:

I've tested videos with various lengths, and it seems like the progress indicator does not appear until the video reaches around 0.5% of the total duration. I'm sure that behavior is probably a part of Windows itself and can't be changed; however, when mpv is paused, the indicator is visible even at the very beginning of the video.

For instance, here is an example from the same video at two seconds:

Would it be possible to make it so that the behavior for the progress indicator matches when the video is playing and when it is paused?

Expected Behavior

The taskbar progress indicator should appear from the start of the video while it is playing.

Actual Behavior

While the video is playing, the progress indicator does not appear on the taskbar until the video reaches ~0.5% of its total duration. The indicator only appears before the 0.5% point if the video is paused.

Log File

log.txt

Sample Files

Any sufficiently long video file should work.

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

• [X] I tested with the latest mpv version to validate that the issue is not already fixed.
• [X] I provided all required information including system and mpv version.
• [X] 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.
• [X] I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• [X] I attached the full, untruncated log file.
• [X] I attached the backtrace in the case of a crash.

[kasper93]

the progress indicator does not appear on the taskbar until the video reaches ~0.5% of its total duration.

Yes, that's correct assessment. The position send to taskbar is rounded to integer % value and 0 is interpreted as no progress by Windows, so only after 0.5% it starts showing anything. There is no reason to do that, ITaskbarList3 api takes ULONGLONG, so the progress can be more fine grained. I will update that when I have time.

EDIT: Will be fixed by https://github.com/mpv-player/mpv/pull/14283