[FFmpeg-user] Explanation of how -r affects frame rate of filtergraph

[Lou Logan]

On Wed, Feb 26, 2020, at 4:02 PM, Peter wrote:
>
> This also results in a 30fps output with all frames present but seems
> counter intuitive to put the frame rate on an image input. I wasn't able to
> find documentation on this behavior. Is someone able to explain how this is
> working internally? And whether or not this "fix" is actually reliable or
> just a lucky coincidence?

Default frame rate for the image demuxer is 25 unless you add the -framerate
input option.

https://ffmpeg.org/ffmpeg-formats.html#image2-1