Re: octave-forge video package

[Andreas Weber]

Am 30.03.2013 15:23, schrieb Christian Scholz:
> I had some problems building the video package on my system using the
> code provided on the website.
> After help from #octave I got it to work with the current svn and the
> following changes applied:

Yes, this was me. As I told you I work on Debian wheezy and there
av_malloc is located in libavcodec. I found this

http://web.archiveorange.com/archive/v/LGwh9dxPQl3ID7MSlW5X

...Move av_malloc(), av_realloc(), and av_free() from libavcodec to
libavutil...

I think configure.ac should therefore check both (avcodec and avutil)

> Also I'm really interessted in expanding the package, however I'm not
> familier with the octave source.
> What I'm trying to do is to expand the aviread function in order to read
> multiple frames at once
> (specified by an index vector, so that it works like its matlab
> counterpart).

Nice. Add your patches to the patch tracker and someone will push them
after a quick review.

> Any hints on how to get familiar with the octave types and
> classes, apart from reading through the whole source?

I don't think you have to read the "whole octave source".
If you want to extend the video package I suggest reading
http://www.gnu.org/software/octave/doc/interpreter/Oct_002dFiles.html#Oct_002dFiles

There are also some older tutorials for example:
http://octave.sourceforge.net/coda/ but the API made some bigger changes
so the info there is a little bit outdated.

Viele Grüße, Andy