[mythtv] [PATCH] better avi seek support

[John Patrick Poet]

Mark Spieth wrote:

> I have implemented a patch that allows avis to be played and seeked 
> correctly. it shows correct length too!
> I know its a bit of a nasty hack.
> The reasons for doing it this way is to minimise the impact on 
> libavformat which Isaac has stressed.
> Thus avidec.c has 1 new function and is thus easy to merge.
> The new function is the same as avi_read_seek except without the 
> url_fseek.
> It is needed to sync the audio and video stream timestamps otherwise 
> they diverge uncontrollably.
> It is only activated if there is an index in the avi file.
> The structures in avidec are partially reproduced in 
> avformatdecoder.cpp to allow scanning of the index table.
> This has been annoying me for a while now and have finally done 
> something about it.
> note that I use myth to play my avi's instead of mplayer or xine due 
> to timestretch and thus it was higher on my priority list.
> feedback welcome.
> cheers
> mark


I have several videos I have tried to import into Myth in the past.  
Doing a "mythcommflag --rebuild" has always been ineffectual.

I am at home waiting for the the "cable guy" to show up, and decided to 
see if this patch solves the problem.  It does!

After a jump to a new location in the file, the video is corrupt for a 
few seconds, but then it clears up and looks fine.  Small price to pay 
to actually be able import these files into the main Myth system.

Thank you,

John