[FFmpeg-user] FFplay: How to show the first frame of a video

[Michael Koch]

Am 14.08.2023 um 07:41 schrieb Michael Koch:
> Hello,
>
> I'd like to make a batch file for FFplay that shows only the first 
> frame of a video until the window is closed. It should also work for 
> still images. This command line works for still images and for most 
> videos, but not for all:
>
> ffplay -loop 0 -t 0 -x 500 -an %1
>
> Below is the console output for a video where it doesn't work. I saw 
> these three messages:
> [mov,mp4,m4a,3gp,3g2,mj2 @ 000001e8bef96180] st: 0 edit list: 1 
> Missing key frame while searching for timestamp: 1000
> [mov,mp4,m4a,3gp,3g2,mj2 @ 000001e8bef96180] st: 0 edit list 1 Cannot 
> find an index entry before timestamp: 1000.
> [h264 @ 000001e8c4a4fc00] co located POCs unavailable
>
> I have two questions:
> 1. How must the command line be modified to make it work with all videos?
> 2. Any idea how to show the n_th frame of a video?

Just found the solution myself:

ffplay -vf select='eq(n,0)' -x 500 -an %1

Michael