On Mon, 2008-10-06 at 10:36 -0500, Carl Karsten wrote:
> given the recent post about AV drift, this seemed relevant:
>
> http://www.pipapo.org/pipawiki/Lumiera/DesignProcess/time_handling
> Lumiera = video editor project (no usable app yet)
It's a nice summary, thanks for the link.
I'm already considering a a fair amount of points taken into the page;
unfortunately, implement them requires a fair amount of changes in the
codebase, most of them planned for 1.3.0 or even beyond (a deep overhaul
of import layer is needed, and planned).
The good news is that even smarter algos should fit nicely into the
synchro engine currently being laid.
> I am wondering what it would take to make a test app: something that would
> generate an input AV stream (file, v4l device... whatever), something like
> transcode would do something to it, and the output would be analyzed to see if
> the AV is still in sync.
>
> I did something similar using a webcam/mic pointed at a laptop that had a
> clock
> on the screen, and an audio clock ("at the tone, the time will be eight, oh
> one.
> beep.") I let that record for an hour, then played it back and looked to see
> if the tone beeped as the second hand crossed 12. I would like to think an
> app
> could do this too.
It is an interesting challenge (and it would be a nice tool to have).
Bests,
--
Francesco Romani // Ikitt
http://fromani.exit1.org ::: transcode homepage
http://tcforge.berlios.de ::: transcode experimental forge
