[FFmpeg-user] custom video enhancements using ffmpeg

[Lou]

On Fri, Jul 27, 2012, at 09:11 PM, Matt Bione wrote:
> Hi,
>    I am looking to do the following :
> Add some custom enhancement (using my own code using opencv or something
> similar) to a video.
> 
> I am looking at ffmpeg to produce raw frames which I can tweak and then
> give back to the ffmpeg to transcode it back. Is there a way to do this
> using the ffmpeg command line tools - maybe using pipes or creating
> streams
> ? I can think of a really inefficient way to do this - dump every frame
> to
> the disk using ffmpeg (e.g. , ffmpeg -i video.mpg image%d.jpg); read
> those
> files and apply my modifications to those images and finally call ffmpeg
> to
> produce a video using those frames(e.g. ffmpeg -f image2 -i image%d.jpg
> video.mpg ). But hopefully there is a better way that someone can point
> me
> to ?
> 
> Regards
> Matt

You can pipe from and to ffmpeg. Possibly overly simple example:

ffmpeg -i input -f <output format> - | <your tool> | ffmpeg -i - output