[gst-devel] how to limit the duration of a pipeline in gst-launch and pyhton bindings?

[Pau Aliagas]

Sorry if this question has been asked before, I've searched the mailing 
list but I've found nothing.

I saw the excellent article from Jono Bacon (and the one in Portuguese 
from the comments), and I wanted to do something a little different, but I 
don't know whay, I cannot find any examples :(

What I want to do is an app that, given a video file in any format, can 
return a given length in the same format (same container, same codecs).

My first idea was to limit the formats, for a quick test, to 3gpp and mp4, 
and see if I could manage those, but it would be much better if the format 
could be autodetected on the fly; the output would always be limited by a 
start and a stop positions.

Before trying the python app, I tried to build the pipeline with 
gst-launch, but I do not know how to do it.

I even had a look a GNonLin -easy to install as is in Fedora Extras-, as 
it looked like it could do the job, but it is still more misterious to me 
than the other filters. I'm totally lost.

Can anybody enlighten me?

Thanks
Pau