[ExtractStream] Re: DVD writing

[David Gerdes]

I see the same thing. On two different Tivo units, one running 1.3 and 
one 2.01 I get glitches in my streams. Some are very minor, some are many 
seconds of garbage. Any glitch seems enough to screw up the final stream 
when mplexing them back together.

Most glitches are visible both on the stream and played directly on Tivo.

This is why we need tools to keep the streams in sync when they
are separated and rebuilt. I think spliting and rejoining synced 
streams should be easy enough. But then re-encoding both the 
video and audio and trying to keep them this sync data seems like a 
monumental task. 

I am starting to think of my Tivo as just a VCR for temporary recording 
of shows. I am thinking about looking at some of these PC based capture
cards to be able to start with a known good stream.

I currently have my Linux drive full of TyStreams that I don't know what
to do with. I am going to start looking to see what is the cheapest 
large scale archival medium out there today so I can hang on to the streams 
until we have tools to keep them in sync. I can always use playitsam to 
replay them back onto the Tivo in the interim. I do like that program.


Michael Patterson wrote:
> 
> I'd like to add my personal audio problems to this list :)
> 
> I've been working ont he DVD writing thing for some time, and I've gotten to
> a frustrating point.
> 
> I split the ty stream into audio and video, and then manually add/remove
> sound from the beginnning of the audio stream until I get it to synch with
> the video.
> 
> Great! So I pipe it in through TMPEG to mux the streams (and do minor
> editing), and find that there is a loss of sync part way through! (by
> watching the end). I have not checked to find out where the two go out of
> sync, but I have a suspiciion...
> 
> There are two spots where the video glitches slightly. These glitches dont'
> show up on the TIVO, just my streams. I suspect this is causing the loss of
> sync.
> 
> When I pull out the ty stream from the TIVO, I get about a 4gig file. If I
> try to use mot tools to split the stream, or convert to MPEG2, I end up with
> only about 250 megs of video data, which doesnt' play.
> 
> --Mike
> 


-- 
David