Demux and Mux question

[danielmak]

I have 2 soccer DVDs. One is poor quality with English commentary. And one is excellent quality with Dutch commentary. Both are PAL dvds and I am working on an iMac Intel processor in the US. I used baturjan's guide for replacing audio on a dvd. In sum, I extracted each DVD to a single VOB using MTR. I demuxed both VOB files with MPEGStreamclip (with the audio file being split as an AIFF file in both cases). I then did a second conversion in MPEGSTREAMCLIP of the Dutch video so I had a DV file. I imported this DV file into iMovie HD6 and edited the English AIFF file so it matched up with the Dutch video. I then exported the edited AIFF file out of iMovie. I then converted the AIFF file with FFMPEGX to an AC3 audio file, since this was the original file type that was used on the Dutch DVD. I put the AC3 and original M2V in the same folder (both with the same name but different file extensions). I then muxed the edited AC3 file and the M2V video file in Toast under the Video tab. The total multiplexing and burning process did not take much longer than any other burn I do in Toast using the video tab setting. And I always burn at 4X using Verbatim 16X DVD-R.

Here's the rub: When the DVD was finished my sound was perfectly matched up with the video but when I play it on my set-top DVD player the video is jumpy. As is standard with Toast when I burn PAL video footage, Toast asks if I want to write NTSC or write PAL and I always choose PAL since there is no need to change the framerate (I have a Philips set-top DVD player that is set to Region 0 and plays PAL and NTSC equally fine). But the video quality of my newly edited DVD is not the same as the original Dutch DVD video quality, which is not jumpy at all. And I should add that the kind of jumpiness is one that is on par with (A) dvds where someone did convert from PAL to NTSC or NTSC to PAL (or both multiple times if a range of folks feel the need to convert) or (B) when people convert XVID files to VOB (although those files are usually very blotchy as well, which is not the case here).

So, can anyone help me understand why this new video would be jumpy when all I did was demux, let the m2v sit while I edited audio, and then mux? Is this a problem with MPEGStreamclip's demuxing (which did not seem jumpy when I viewed the DV file in iMovie) or with Toast's muxing? And how might I solve this problem? Thanks in advance for any help.

[baturjan]

Daniel, I have never worked with PAL. You may want to try BitVice Helper. I can't find it on the internet anymore, but I have a copy that I can send you. However, since upgrading to Snow Leopard it won't launch. In fact, I don't even remember using it on Leopard. If you are going to be working with mpeg2 files, you may want to get Mpeg2Works. It has a lot of tools built into it. The demuxing and multiplexing is nice.