[FFmpeg-user] ffmpeg still to video question

Phil Turmel philip at turmel.org
Thu Aug 2 13:19:41 CEST 2012

On 08/02/2012 01:44 AM, ffmpeg at jrbtechnical.com wrote:
> Hello:
> I am looking to see if maybe I am missing an alternative to making a mp4
> from still images.
> I need the framerate of the mp4 (x264) to be 29.97, so I can't use the
> typical "-r 5" that people suggest to slow down the animation.  I am
> scripting things in perl with imagemagick, so I can easily create some
> loops in the script to output 15 frames of each image, making a frameset
> of a couple 100 frames, but that seems a bit "the long way around the
> barn".  But, this may be the only way to do this.

Option placement matters.  Try something like:

ffmpeg [in opts] -r 2 -i input%03d.png [out opts] -r 29.97 outputfile

If you need more help, you really should post your command line and
complete console output.

> I just thought I would check with people to see if there is something I am
> missing in ffmpeg so that it knows to make 15 frames out of the same still
> image before going to the next image in the still set, while creating the
> output movie.  I have been looking around different forums and the
> documentation, but not really finding anything that seems to work like
> this.
> Thank you for any help with this, if there is a solution other than
> creating all the frames individually.

If you need variable intervals, the simplest solution is to "duplicate"
frame images with softlinks as needed.  No extra disk space, and ffmpeg
doesn't care.



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