Something for the programmers...

john_pappas bunt643 at h...
Fri, 12 Apr 2002 10:00:52 -0000


I may have stumbled onto some insight into timecode skips and stream 
oddities, but I'm not educated enough to know. I have been using 
ExtractStream 0.3 and the 0.3 version that came with TiVo app off and 
on. I was losing several seconds of shows at the ty stream breaks so 
I started mucking with sendstream. On one half-hour Futurama show, I 
recently used ES for the first and third segments, and had to use SS 
on the 2nd because ES was skipping large amounts of bad blocks (at 
least a couple seconds of a funny part). I then used TyConvert.exe 
on the 2nd segment to split it into 2 files like the ones I got from 
ES. After using TyConvert with the "Don't skip bad blocks" option 
turned on, I muxed the audio and video with TMPGEnc and noticed that 
roughly the first second of video was from a previous Futurama 
episode. The audio was correct, but the first half second of video 
was clearly from another episode (that's on my TiVo somewhere), and 
the 2nd half second was sort of a blurry blend between the wrong show 
back into the correct show. So is Sendstream (0.2) messing up? Do 
the files on the TiVo actually contain these artifacts from other 
shows? Do the mfs tools or drive expansion methods cause some minor 
glitches like this? Were it not for that one second glitch, I would 
have a flawless backup of the show. If I went back to 1 virgin 
drive, would I have this problem?

I am willing to do anything you might need of me to help look into 
this.

**TiVo software 2.5.1, with an HDR212 upgraded to dual 60 gig drives 
using the Hinsdale voodoo.