[FFmpeg-user] Plotting Circles and labels on individual frames of a movie

Rainer M Krug Rainer at krugs.de
Thu Apr 8 12:10:16 EEST 2021

Hi Nicolas

> On 8 Apr 2021, at 10:58, Nicolas George <george at nsup.org> wrote:
> Rainer M Krug (12021-04-08):
>> I have found “draw_text”
>> (https://ffmpeg.org/ffmpeg-filters.html#drawtext), but I have no idea
>> how I could do this. We can assume that I have a text file with the
>> following columns:
>> FRAME: the frame on which the labels and circle should be plotted
>> X:     the x-coordinate
>> Y:     the y=coordinate
>> LABEL: label for the point
>> Also possibly important, there are multiple (many) particles for which
>> circles and labels need to be plotted on each frame. 
> This looks like something ASS subtitles can do easily.

Interesting - could you give me some more pointers? Formats?


> Regards,
> -- 
>  Nicolas George

Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)

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