How to capture a screenshot or a part of video within a rectangular area using mpv built-in commands

[ahaoboy]

The mpv command screenshot-to-file will have a filter effect when taking a screenshot, but how to specify a rectangular area when taking a screenshot?

I'm currently using ffmpeg to capture a rectangular area in the video, but this loses the effect of filters like anime4k.

And does mpv have a built-in command to export video within a specified range and set a rectangular area?

mpv-easy/mpv-easy#37

[kasper93]

--video-crop=<[W[xH]][+x+y]>, --video-crop=<x:y>

[ahaoboy]

--video-crop=<[W[xH]][+x+y]>, --video-crop=<x:y>

Thank you, this can indeed be used to replace ffmpeg, but what I want most is to be able to use mpv command to achieve this, so that the filter effect set by the user can be retained

like this:

screenshot-to-file ./a.png --video-crop=100x100+100+100

[kasper93]

set video-crop 100x100+100+100; screenshot-to-file ./a.png; set video-crop ''; or something similar.

[ahaoboy]

set video-crop 100x100+100+100; screenshot-to-file ./a.png; set video-crop ''; or something similar.

I have tried to do this, but the set video-crop or vf add command is not synchronized, and needs to wait for a frame, and this will cause the player to shrink and enlarge, which is not a good experience.

[mrfragger]

and needs to wait for a frame

perhaps try adding this in between
frame-back-step; frame-step
the new mpv nightlies don't have this problem anymore and it isn't required.