Questions about TS audio-syncing and VITC removal

[Jarrah]

Good day,

I apologize in advance if this is a simple matter, or has been discussed before, but I've searched and browsed various threads and cannot find the answers to what I am having trouble with.

The first issue is removing the VITC (http://en.wikipedia.org/wiki/Vertical_interval_timecode) bars from the top of a DVB capture. Is there a simple way to do this with a program like VirtualDub? You can find a screenshot of what I'm working with here (http://i10.tinypic.com/63bqdzm.png).

My second issue, and the most troublesome one, is audio going out-of-sync after encoding my HDTV captures to XviD. The program I have used for cutting commercials, and converting to MPEG-2, is HDTVtoMPEG2 v1.11.89 and the audio stays in sync as MPEG-2. The problem arises after converting to XviD using AutoGK and only after the first commercial cut, everything leading up to that point is in sync. With that in mind, I tried VideoReDo which was easier for cutting the commercials, and a test clip I encoded to XviD looked promising, but yet again, the audio was off by a few seconds about 30 minutes into the show.

Is there something simple I am missing when it comes to HDTV to AVI encoding? I should also mentioned I tried with keeping the audio source as AC3 as well as CBR MP3, neither made a difference.

Thanks for any help.

[rack04]

My second issue, and the most troublesome one, is audio going out-of-sync after encoding my HDTV captures to XviD. The program I have used for cutting commercials, and converting to MPEG-2, is HDTVtoMPEG2 v1.11.89 and the audio stays in sync as MPEG-2. The problem arises after converting to XviD using AutoGK and only after the first commercial cut, everything leading up to that point is in sync. With that in mind, I tried VideoReDo which was easier for cutting the commercials, and a test clip I encoded to XviD looked promising, but yet again, the audio was off by a few seconds about 30 minutes into the show.

From what I've read HDTVtoMPEG2 has always had problems with conerting to MPEG2. Even the author suggests If you need this capability you should use another tool like VideoRedo. I have used VideoReDo many times and have never had a problem with it. Does your ac3 file have a delay? If so, are you accounting for this delay when muxing?

[laserfan]

...a test clip I encoded to XviD looked promising, but yet again, the audio was off by a few seconds about 30 minutes into the show...What method did you use to re-encode to Xvid? I'm guessing your conversion didn't take into account the true frame rate of the program and thus the audio gets out-of-sync.

Another thing to try is to set AGK to CBR audio (it defaults to VBR IIRC).