How to see frame numbers on OSD

[sant527]

mpv version and platform

% mpv --version :(
mpv git-b1893d2 (C) 2000-2015 mpv/MPlayer/mplayer2 projects
built on Sun Nov 8 16:37:08 UTC 2015
ffmpeg library versions:
libavutil 54.31.100
libavcodec 56.60.100
libavformat 56.40.101
libswscale 3.1.101
libavfilter 5.40.101
libswresample 1.2.101
ffmpeg version: 2.8.7

When i do Shift + O , it shows the current time and total time of the video.
in the same manner how to se current frame number and total frame numbers

[wiiaboo]

Put this in your mpv.conf:

osd-status-msg=${playback-time/full} / ${duration} (${percent-pos}%)\nframe: ${estimated-frame-number} / ${estimated-frame-count}

[ghost]

Reminder that the frame numbers will be inaccurate.

[michael-ts]

Reminder that the frame numbers will be inaccurate.

Inaccurate? Why would this even be useful to me?

[ghost]

Well who cares?
Frame numbers don't exist.

[porg]

Thanks, this helps a lot for analyzing videos with a variable framerate (VFR), which one can create with the ffmpeg options -vf bpdecimate -vsync vfr to lower filesize without quality loss significantly in videos with a lot of still images (slideshows, screen recordings, etc).

[NA0341]

Well who cares? Frame numbers don't exist.

Does that mean that using the frame range to specify an exact portion of a video is inacurate?
I came here because I wanted mpv to show me the exact current frame number to specify the frame range in HandBrake. (I thought this is more precise than the timestamp since I'm referring to an exact frame in the video.)

I mean if you have a fixed frame rate of say 30 frames per second ~ then each frame should have an exact duration of 30/1 seconds ~ isn't it?
And even with VFR ~ after decoding you should still have a fixed number of frames per second.

I mean after all VFR is to reduce storage usage without compromising quality. But it doesn't concern with the bitrate (framerate) after encoding ~ or does it?

Otherwise using frames to specify exact points within a video stream shouldn't be a practicable thing in the first place if it's that inaccurate.

Can someone help?