On Mon, 03 Jan 2005 16:31:26 +0000, Gary Dawes <[EMAIL PROTECTED]> wrote: > Having finally treat myself to a DVD burner for christmas, I have > started exporting shows to DVD, but have found that the audio is ahead > of the video by a small amount. > > I have searched the various wikis, and mailing lists, and have found > various posts about this, but while different people have suggested > different things, none of them have worked for me, and noone else with > the problem has reported that they have solved the problem, and by what > method. > > I'm running knoppmyth, with mythtv 0.16, and the latest versions of > transcode mjpegtools available from apt. I'm also running the latest > nuvexport (27/12). > > I've checked my audio recording settings and they are at 48khz > > I found one snippit of information which suggested running mpeg2desc -m > on the .mpg file to determine the audio offset, and then using that > information to reencode the file. > > Any ideas? > > Thanks > > Gary
Gary, I've had this issue, too. In fact you probably ran across some of my earlier posts in your research. The only conclusion that I was able to come to is that there is a bug in some ivtv versions which cause the mpeg files that are recorded to have some flaw in them. I was always able to play the original recordings with no sync issues. It was when I tried the mpg2->mpg2 cutting that I hit problems. I also hit the same problems with a manual edit using avidemux and mplex. After spending a good chunk of my Christmas vacation on it, I now have a fully functional Myth box again. I can successfully export recordings with no audio sync issues. While I was debugging, I tried almost everything. I tried multiple versions of avidemux, mjpegtools, even multiple versions of the kernel. I tried ivtv 0.1.9 and 0.1.10 (100zz, I think). I tried FC2, then back to FC1. Nothing worked. Why does it work now? Well, I switched back to FC2. Then I used one of the new 0.2 ivtv drivers. I think that's what did it. I can now successfully export my _new_ recordings. However, when I try to export any of the old recordings, I still get audio sync issues. This fact makes me even more confident that the problem lies in the ivtv driver. I know this is a really frustrating problem. Try the new ivtv drivers and see if that helps. I think they're in atrpms testing, so make sure that's enabled (this is assuming you're running Fedora and using apt). If you'd like I can get you the versions of all of the relevant programs on my functional box. Cheers, Lane -- Meetup with other Myth users! http://mythtv.info/moin.cgi/MUG
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