[FFmpeg-soc] making moving and zooming effect

[Stefano Sabatini]

On date Tuesday 2009-11-03 23:05:52 +0200, Oleksandr Bondar encoded:
> Hello,
> 
> I am creating video web editor where I work on video effects now. Want to
> have effect when few videos change each other by moving and zooming. like
> slideshow on mac.
> 
> As I understand from sources and docs, I need to use transpose and scale,
> may be overlay filters. But I do not how to start with them.

Each filter is documented in doc/libavfilter.texi. And of course there
is the code, and ffplay.c / ffmpeg.c provide the reference examples
for their use in a complete application.
 
> I want to understand how to use filters taking filter source as a doc, but I
> do not understand how to do this for now.

You need a source, check for example libavfilter/movie_src.c.
 
> Please, give me direction and few simple examples of using those filters so
> I can continue and find out how to use avfilters.

Are you suggesting a sample application?

That would be useful for other users as well, if you want to try to
tackle the problem and provide some code I'll try to help / review it
here or on libav-user, then the example could be published on the
multimedia wiki.

Regards.