On Tue, 2005-01-04 at 12:04 -0600, Lane Schwartz wrote: > On Tue, 4 Jan 2005 12:03:56 -0600, Lane Schwartz <[EMAIL PROTECTED]> wrote: > > 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 > > > > I should point out that I'm using a PVR-250 and am in the U.S. > > Lane
Thanks for the replies. Oddly enough whilst fiddling about today, I have found out that very recent recordings are fine, it's just older recordings. All of them have been recorded on the same version 0.16. During that time I have converted a couple of files to divx with no bother. The box has seen no change in hardware or software, just a couple of database checks following a power outage. So I've got no idea why, but the problem has gone away. Very strange. Thanks Gary
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