On Saturday 24 June 2006 05:05, Steven M. Schultz wrote: > On Sat, 24 Jun 2006, Roger Ivie wrote: > > On Sat, 24 Jun 2006, Bob Stia wrote: > > > Have a new problem that has never happened before. Ripped a dvd and > > > converted it to a movie.m2v - then shrunk that to shrink.m2v. ... > > Why shrink it? If you're making a 'backup copy' of one of your > DVDs (for the kids to scratch/maul/etc) why not simply use a dual > layer disc and make a 'bit for bit' copy? DL media's down to a dollar > or so for the 'noname' brands and not much more for the "good stuff" > (if you watch out for the rebates and sales). > > > > Went to recombine them with mplex for a movie.mpg. All seemed to work > > > well except that the audio is WAY out of sync with the video. Not just > > > a little. But by many many frames... > > > > Yeah, I've seen this. Sometimes quite obnoxiously; I've seen a few > > movies where the audio stream doesn't even start for a second or so! > > > > To deal with it, I use a little program I wrote called deltapts. It > > That's not the only problem that can arise > > Naive decode/re-encode pipelines can also run up against DVDs that > switch frame rates. DVD starts out with a 29.97 fps splash screen > and the decoding side uses that frame rate for the entire movie even > though the rate switches to 23.98 with 2:3 pulldown. > > > It does have a weakness in that it assumes all audio streams have the > > same delay; it returns the delay for the first audio stream it sees. > > Technically it's legal for the audio stream to stop/start at any time. > Not sure if any DVDs use that feature though ;) > > > I've seen a couple of cases where that isn't true. For those, I strip > > down to the audio stream I'm interested in using vobstripper, another > > I don't bother with either the stripping or the recoding/shrinking - > backups are just that: _exact backups_ > OK Steven,
I don't mind paying a buck or two for DL media, but how do you do your "bit for bit"? You still rip them and recombine them right? Are you saying that it is the "shrink" process that screws them up? Bob S. Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
